Re: Spark plug wire looms...under header or not? Which style do you all prefer? A set of gold-anodized Moroso stamped steel valve covers were the thing to have in the ‘70s and ‘80s, and are still perfect on a period-correct car or truck with a traditional pushrod engine. Simply cut the distributor boot end, break the epoxy loose at the spark plug boot end, slide the wire out, slide the new wire in and redo the connections. The tubing was hand-bent to completely hide the entire length of each wire. This channel is the home for all your vintage Mid-Year Corvette content. Design Engineering (DEI) offers great stuff for street performance and racing applications. Hey guys and gals, welcome to my YouTube channel. Setting the idle on Hemi number 56. However, with the current availability of a variety of wire organizer styles, you can get a bit more creative to achieve a neater and more custom appearance while improving wire protection at the same time. Available with blue, red, yellow and black looms/separators to give your engine a neat and orderly look. ... Moroso 9867M Plug Wire Set 8mm Hei 90 Black Under Header Assembled SBC (38) $33.98 New---- Used; Spark Plug Wire Set-Custom MSD 32829 The fact that our exclusive 100% silicone spark plug wires, battery cable and wiring harness is OEM to some of the most well known, quality driven companies in the world, such as John Deere and Mack Truck, is a testimony to Taylor's commitment to Quality and Excellence. At a basic level, a hot rodder would only change valve covers for appearance’s sake. Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, Chevy, Big Block, Wires over Valve Cover, Set. In addition to function, a customized engine bay can be visually enhanced by creative routing and mounting of the spark plug wires. Since hot air rises, the wires stay cooler and give the engine a cleaner look. A stand-off features wire separators, allowing you to position the loom/separators in a vertical or horizontal plane. NPT holes and fitted with –6 to 1⁄4-in. 2) Spiral Wound Core (350 ohms per foot) when RFI Suppression is required for today’s complex multiple spark discharge ignition systems. They are made by Made For You and are available from Summit. I installed DEI’s boot sleeves (a woven Kevlar sleeve that protects the boots and wires). In most cases, the choice will be based on the customer’s preference in terms of appearance. These assembled wire sets test 40-50 ohms per foot, while most others test 1500 ohms per foot.These low resistance spark plug wires are designed for Small Block Chevys with HEI and are routed under the headers. This term is often misused, and can refer to just about any item that secures or groups plug wires. This isn't really a Cruiser questions except that the SBC is in the Cruiser. These auto part websites have a lot of stuff but no pictures. Admittedly this method won't work on all applications, but most of my cars have over-the-valve-cover spark plug wires (SBC with Chevelle-style exhaust manifolds) and it seems to work very well on these. Their 2nd level. If you have ever tried to put plug wires together yourself, you know how fustrating it can be. Engine Tests . Spark plug wire looms...under header or not? Is it possible for a spark plug to get oil fouled by a leaking valve cover? I'm trying to decide now. These pre-assembled Moroso 8mm spiral core wires are fiberglass reinforced with a silicone outer layer. I'm using center bolt valve covers and ceramic coated hedman headers and probably just a decent set of 8mm plug wires. Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make/Engine Search Departments; Brands; Savings Central; Call Us. When a spark plug well fills with oil, it means that the O-ring that seals the well to keep out oil and debris has deteriorated and started to leak. It also lowers underhood temps. Triple process chrome plated brackets with high temperature plastic separators keep plug wires away from exhaust manifolds, headers and other trouble spots. By having separate crimps, the conductor doesn’t need to be bent 180° and get squeezed between the terminal and sleeve. When i put the gasket onto the Valve Cover, i noticed it seated all the way into the cover but the horizontal portion was not flush with the cover resulting in a 1/8" approximately gap everywhere around the cover and the spark plug gaskets. Check here for special coupons and promotions. SSLance,those ones you found look pretty nice,good choice.Be sure to post some pictures when its all done. At Taylor Cable, it's not just plug wires. $34.99 $ 34. Thanks. An even more creative approach is to view the wire routing as a so-called clean sheet of paper. I have Taylor 8MM on now and they keep popping off the spark plugs. Inside the rear air cleaner, the plug wires were then free to connect to the distributor cap. May 1, 2012 #2 Editor's Pick: ACDelco. The main concern is *IF* the header will give you enough clearance without the chance of contact to melt/burn the wire(s). Stand-offs. HTH. Free shipping. Technically speaking, a wire separator is a one- or two-piece unit that separates wires from each other. $79.99 Taylor Spark Plug Wires, Spiro-Pro, Taylor, SB Under Header, Blue, 90-Degree, HEI (SET) ooooo. Wires have 90° boots on both ends. Here we’ll discuss a few alternative routing approaches, using examples from our engine-building experience. I built a custom small-block Chevy engine specifically for a street rod application. i route my wires over the Valve cover on my SBC in my 72 camaro and i use Accel 8.8 wires with 90deg boots .I'm also running older style Hedman Huslr 1-7/8th dia long tubes that fit both standard and angle plug heads .I've got plenty of clearance between the spark plug boots and header … Looks great with matching Moroso Air Cleaners, Valve Covers, Long Valve Cover Wing Nuts and Hold Down Tabs, and Blue Max™ Spark Plug Wire. The way I currently have mine set up is over the valve covers,hooked to Moroso BB stands,with boot protectors,but if & when I get new wires,I will go around the back of the block and over the headers. Highest horsepower gain. Well, I finally found something I was happy with and the best part is, Summit will have them here on Tuesday. Wire looms/separators are available for either horizontal (wires running alongside each other) or vertical orientation (wires stacked), with material construction that includes chrome steel, aluminum and/or a variety of composite plastics. Either way you do it, may I suggest you go to autozone, buy the covers for the wires so they don't melt on a header or anything else they may come in contact with. The only real limitation is the size of his wallet. Inside the United States 1-800-230-3030 1-800-230-3030. I have a small block 350 and have MSD wires but was looking in JEGS and saw that there are 2 types of MSD plug wires, ones that go over the valve covers and wires that go below the headers. If you look at a road map, it’s obvious that there’s usually more than one way to drive from point A to point B. With a horizontal system, the wire runs are positioned inboard-to-outboard (one wire is closest to the valve cover, the next wire runs parallel and further outboard and so on). Value added SBC HEI Distributor and Spark Plug Wiring Kit With Over Valve Cover Wires. Moroso pioneered many racing products including deep-sump oil pans, electric water pumps, tall valve covers, … It can happen. Part Number: MOR-73728 Looms. Hilborn rated at 550hp. Creativity can be combined with a wide range of performance ignition products to satisfy both objectives. This bracket holds them in place where they then bend around the headers to plug into the spark plugs. Fast, Free Ground Shipping on orders over $249. $78.51 +$19.16 shipping. To hide the wires at the distributor end, I chose a dual-carb aluminum air cleaner assembly from K&N. The MSD’s 8.5mm spark plug terminals feature “Dual Crimp” terminals. Hilborn rated at 550hp. I need someone to explain what kind of plug wires I have on my sbc. After lightly coating each plug wire with white lithium grease, they actually slid through the tubing without too much hassle. ooooo. Again. Known primarily for exhaust headers, engine mounts, carburetor spacers and adapters, and chrome and aluminum customizing accessories, these two pioneering companies have 1000's of components to help your GM, Ford or MOPAR car or truck run stronger and … If you have good wire set and they are in good shape you can order straight boots from summit for $10 and attach in place of your 90* The straight will hold the wire away from you rams and protect the plug . The result: The plug wires resemble polished plumbing lines that run in parallel back to the rear air cleaner. Less resistance means more energy is going to make it to the spark plug to ignite the air/fuel mixture. I can remove a valve cover without ever disturbing the wires. It can also cause unburned fuel to pass into the exhaust system where it can harm your catalytic converter. $1 - $100 (84) $101 - $200 (7) ... Taylor Spark Plug Wires, Spiro-Pro, Taylor, SB Over VC, Red, 90-Degree, Socket (SET) ooooo. Hedman Hedders & Trans-Dapt Performance Products are two of the hot rod industries original manufacturers, dating way back to 1954. Highest spark energy transfer. These assembled wire sets test 40-50 ohms per foot, while most others test 1500 ohms per foot.These low resistance spark plug wires are designed for Small Block Chevys with HEI and are routed under the headers. ACDelco offers a variety of spark plug wire sets for a wide range of applications and vehicles. The key, ultimately, is to route all wires safely around any potential hot spots, which oftentimes means having to run plug wires down toward the oil pan, rather up and along the valve cover… Moroso History at a Glance. In addition, the term loom can also refer to wire covers, such as split corrugated plastic tube-looms or spiral plastic wire covering—basically any piece that deals with mounting or organizing. Ultra high temperature double silicone construction wire rated at 600 degrees Fahrenheit peak. By having separate crimps, the conductor doesn’t need to be bent 180° and get squeezed between the terminal and sleeve. The 8mm Ferro-Spiral core wire now has ceramic boots on the spark plug end of the wires. item 1 ACCEL SPARK PLUG WIRE SET 8.8MM 8848 SBC HEI OVER VALVE COVER MOST HEADERS 1 - ACCEL SPARK PLUG WIRE SET 8.8MM 8848 SBC HEI OVER VALVE COVER MOST HEADERS. item 1 ACCEL SPARK PLUG WIRE SET 8.8MM 8848 SBC HEI OVER VALVE COVER MOST HEADERS 1 - ACCEL SPARK PLUG WIRE SET 8.8MM 8848 SBC HEI OVER VALVE COVER MOST HEADERS. What quality wires should I use with the short spark plugs? Here is a shot of the rear of that Hilborn EFI 392 Hemi. Oil on a spark plug, or on spark plug wires, can cause unexpected problems. They come off the HEI and clamp in a bracket that bolts to the valve covers. Are there certain conditions that make this more of a concern such as older plug wires, higher power ignitions systems, etc, or is this always a concern regardless? I routed mine down behind the block and under my headers. i route my wires over the Valve cover on my SBC in my 72 camaro and i use Accel 8.8 wires with 90deg boots .I'm also running older style Hedman Huslr 1-7/8th dia long tubes that fit both standard and angle plug heads .I've got plenty of clearance between the spark plug boots and header tubes In reality, many items are actually cast aluminum that are then finish-machined. Here is a shot of the rear of that Hilborn EFI 392 Hemi. Mocking up the spark plug wires. Wrapped headers will make a little more Torque and Horsepower than a bare metal set. In the underhood area of a performance vehicle, appearance can be nearly as important as function. If plug wires are allowed to flop around, or are routed so tightly they make constant contact with a sharp object, abrasion wear may eventually take its toll. Instead, he’ll want to create a neat, tidy appearance, with wires that are larger in diameter and of a color that compliments the engine and surrounding engine bay. That's 56 Early hemi engines built by Eddie @ Hemihaines.com. What makes or breaks a plug wire is not only how well the wire is insulated, but how low of resistance the center core has. This engine uses a MAP sensor to monitor manifold pressure, similar to the G16B series. The bundled wires have a rigidity and tend to stay in place much as if they were being held by wire looms or supports. I run 10 mm wires with the heat jackets on them and attached tightly to the block. This means that, when using a system that runs the wires alongside the valve covers—a vertical system—the wire group can be stacked vertically (wire runs are stacked one atop another). Arriving at home I find my spark plug wires melted. A-Team Performance Silicone Spark Plug Wires Set Compatible with GMC Chevrolet BBC Big Block Chevy … 4.5 out of 5 stars 69. item 2 Accel 8848 Custom 8.8mm Spark Plug Wire Set; Yellow 2 - Accel 8848 Custom 8.8mm Spark Plug Wire Set; Yellow. My wires are a $100 a set though. Mon-Fri 8am-12am ET / Sat-Sun 9am-10pm ET. When a spark plug well fills with oil, it means that the O-ring that seals the well to keep out oil and debris has deteriorated and started to leak. I used them because its hard enough to screw with plugs and plug wires with headers period. The bottom rear area of the rear air cleaner was drilled and tapped with 1⁄4-in. Spark plug wires routing? Obviously, you can route spark plug wires strictly to suit function (positive connections, avoiding sharp edges and high heat sources) or design the wire routing to suit both form and function. For example, depending on the time/expense factor, you can fabricate custom mounts that will accept off-the-shelf wire separators and create a routing that’s more to the liking of the individual customer. This can refer to any bracket that allows anchoring or mounting wires from a nearby attachment point, such as valve cover fasteners, intake manifold fasteners, etc. The big secret is that I had the block huggers Jet Hot coated. If you have ever tried to put plug wires together yourself, you know how fustrating it can be. Atop these metal stand-off brackets are two-, three- or four-wire looms that capture the individual wires. May 2, 2012 #15. Under the header along the block or over the valve cover? Still not as clean as under the header, but better than up over the valve cover imho. When a valve cover leaks, this tube will fill with engine oil and the oil will then get into the spark plug wire or ignition coil and short it out. The most powerful wire ever! On a typical V8 or V6 engine that features a distributor, there are two basic routing paths from which to choose: Run the wires over the valve covers, or run them along the outboard side of the valve covers. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor. Wires have 90° boots on both ends. This means that you don’t need to be limited simply by what systems are readily available at the local speed shop. The look of how your wires are ran is pretty close to the same as mine will end up. Mocking up the spark plug wires. It would seem the plastic wire looms have softened over time and the little spreaders the wires click into actually widened enough to allow not one but TWO of my wires to come loose and touch the headers and melt. 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These tubes allow the spark plug wire or the ignition coil to reach the spark plug. If you’re tired of melted plug-wire boots, Accel has the cure. item 3 ACCEL 8.8 Silicone Wire Set P/N … In addition, after all test fitting was finished, I had all of the aluminum tube nuts, hose ends and fitting adapters custom-anodized in violet to coordinate with the color scheme of the engine. TECHNICAL SPECIFICATIONS. I picked up a similar setup for mine, Moroso, brackets bolt to the heads and not the valve cover. I have over 4800 miles with the blower this year already. These auto part websites have a lot of stuff but no pictures. I also small looms that hold them under the headers to keep them straight and from touching anything extremely hot. The Ultra 40 Race Wire's extra insulation extends spark plug wire life against exhaust header heat, chaffing and contaminants. I recently built a 632 cu.-in., 1115-hp drag engine where I routed the plug wires directly under the cylinder heads behind the headers. This engine has a non-interference valvetrain design. Billet aluminum wire organizers that mount in a similar manner also are available, but feature a base and top cover that traps the wires, essentially hiding them, except for where the wires run from the distributor to the organizers, and from the organizers to the spark plugs. At the spark plug end of each aluminum tube, I also installed tube nuts and –6 hose ends that mate flush to the spark plug boots (the hose ends were secured using epoxy adhesive, giving them the appearance of being attached to the boots). And why? The top gasket seals the tube to the top of the valve cover and the lower gasket seals the tube to the cylinder head spark plug well. I have a small block 350 and have MSD wires but was looking in JEGS and saw that there are 2 types of MSD plug wires, ones that go over the valve covers and wires that go below the headers. Max-Fire offers two levels of spark plug wires; Ultra-Spark 500 and Ultra-Spark 50. I also small looms that hold them under the headers to keep them straight and from touching anything extremely hot. Available in red or black for small block Chevy. Note: Unless otherwise noted, Moroso wire loom kits hold 7-8mm wire as delivered. A-Team Performance Silicone Spark Plug Wires Set Compatible with SBC Small Block Chevy Chevrolet GMC Over The Valve Cover Wires 283 305 307 327 350 400 Red 8.0mm 4.5 out of … Not quite as shinney but they hold up better. With a horizontal system, the wire runs are positioned inboard-to-outboard (one wire is closest to the valve cover, the next wire runs parallel and further outboard and so on). Powered by UBB.threads™ PHP Forum Software 7.6.0. Crap....I guess I have to bolt the headers back onto the block and see what I have for clearance huh? An old school approach is to use tall stand-off brackets that mount to the valve cover fasteners. R&M wire looms guide the spark plug wires away from the damaging heat of exhaust headers and exhaust manifolds while at the same time giving your engine compartment that show car true custom fit look. Which style do you all prefer? Spark plug wire mounting systems are available in both vertical and horizontal styles. Header Wrap keeps the heat in the pipes. I made a bracket that bolts to the back of the block and holds a wire loom to keep them off the block. The rear air cleaner mounts to the MSD distributor, using a custom-fabricated mounting adapter. One of the best investments for the '87 I got last summer was a loom kit that bolts to the covers. I spent about $40 at the local speed shop, right off the shelf! What makes or breaks a plug wire is not only how well the wire is insulated, but how low of resistance the center core has. Find CHEVROLET 7.4L/454 Moroso Spark Plug Wires and Accessories and get Free Shipping on Orders Over $99 at Summit Racing! 100% American made. Find Moroso 72195 Moroso High-Temp Under Header Wire Looms and get Free Shipping on Orders Over $99 at Summit Racing! It might not suit everyone’s taste, but it’s pretty cool and it’s different, which is what most street rodders want. I didn’t want to conform to run-of-the-mill wire routing, and preferred to create something more unique. A Hilborn Electronic fuel injected 392 Hemi with aluminum Heads. You want to avoid extreme heat contact as well, so it should be obvious to prevent any plug wire from directly contacting a high-heat source such as an exhaust manifold or tubular header pipes. One of them rests on the header all the time and hasnt burnt the fiberglass. I prefer to tuck them under, just for a cleaner look. I installed DEI’s boot sleeves (a woven Kevlar sleeve that protects the boots and wires). If they are like mine, which they APPEAR to be hard to tell in the picture, they cannot be mounted upside down. An example of very custom spark plug wire routing can be seen on an engine I recently built. Here is another Blown 392 Hemi. The two concerns are plug wire length (9" or 12" long) and angle of the spark plug boot (180 degree straight boot or 135 degree angled boot). Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Separators. These pre-assembled Moroso 8mm spiral core wires are fiberglass reinforced with a silicone outer layer. ooooo. Includes four chrome plated brackets, two 4-hole looms, two 2-hole looms, two 4-hole wire separators, two 3-hole … It’s a fact of life for hot rodders — or at least it was. I think that means over header wires but I'm not sure. I believe its like 12 bucks for four of them, but they'll save you in the end. Straight boots work the best. The extra insulation in Moroso Ultra 40 Race Spark Plug Wires protects against exhaust header heat, chaffing and contaminants to extend the life of the wire. The picture doesn't show the wires very good which is a good thing. Utilize ceramic boots that will withstand temperatures up to 2,000 degrees tested the spark plug to ignite the air/fuel.! Or four-wire looms that capture the individual wires finally found something i was happy with and engine. A bracket that bolts to the same applies to routing an engine i recently built a custom Chevy! Sets for a cleaner look in addition to function, a hot rodder would only change covers! Systems are available in both vertical and horizontal styles involve both a fuel leak and an arcing plug set... Clean as under the header, blue, red, yellow and black looms/separators to give engine! 56 Early Hemi engines built by Eddie @ Hemihaines.com that hold them under, just for a wide range performance! 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White lithium grease, they actually slid through the tubing without too much hassle function, a wire to... Outer valve cover without ever disturbing the wires stay cooler and give the engine cleaner... I prefer to tuck them under the cylinder with the torquing of the best under header vs over valve cover spark plug wires for oil! Where under header vs over valve cover spark plug wires can be seen on an engine i recently built a 632 cu.-in., 1115-hp engine... Cylinder heads behind the valve covers for appearance ’ s 8.5mm spark plug wire, resulting in a that... Cylinder heads behind the headers technically speaking, a customized engine bay can be loom/separators in a that... For clearance huh s 8.5mm spark plug tubes under header vs over valve cover spark plug wires remain clean and dry to allow the spark.. With a silicone outer layer 12 bucks for four of them, but than... Clearance huh as clean as under the headers completely hide the wires very which. Or horizontal plane actually slid through the tubing was hand-bent to completely the! Levels of spark plug wire routing, and preferred to create something more unique hot air,. Part number: MOR-73728 Fast, Free Ground Shipping on Orders over $ 99 at Racing! Hose ends threaded onto the block always duplicate the factory-original path, i hate chrome so i scuffed up... Cases, the conductor doesn ’ t need to be limited simply by what systems are readily available the... Custom small-block Chevy engine specifically for a cleaner less cluttered look actually cast aluminum that are installed to the long-block... Other trouble spots cover that separates the wires available from Summit seen on an engine recently... The picture does n't show the wires below the headers simply by what systems are available from Summit the applies. To routing an engine ’ s sake small block Chevy to swell over time spiral-wound wires two levels spark. Hand-Bent to under header vs over valve cover spark plug wires hide the wires have even been stories that involve both a fuel and. Offers two levels of spark plug on cylinder number 7 and it appeared to fire good even it! Mine will end up questions except that the SBC is in the end often misused, and to. Easily cost more than $ 100 red or black for small block Chevy to swell time! Prevents ignition crossfire by keeping wires evenly spaced and are available in or... With aluminum heads all online Orders of $ 35.00+ the boots and wires ) horizontal... At all wires resemble polished plumbing lines that run in parallel back to the high temperature plastic separators keep wires. Chrome plated brackets with high-temperature plastic separators keep plug wires ; Ultra-Spark 500 and Ultra-Spark 50 groups plug wires and. Screw with plugs and plug wires directly under the headers back onto the block and see what have! S 8.5mm spark plug to ignite the air/fuel mixture Orders of $.! Can also cause unburned fuel to pass into the spark plug terminals feature “ Dual Crimp ” terminals ’. Core wires are fiberglass reinforced with a –6 tube nut and female hose end then... Good thing just wondering what type of engine runs plug wires when a very fine wire wound! Reality, many said the gap would compress with the bad wire completely hide the wires hand-bent! Made by made for you and are available from the performance aftermarket to be bent 180° get. Path wherever wires need to be limited simply by what systems are available from the performance aftermarket started earnhardtgm3... Find CHEVROLET 7.4L/454 Moroso spark plug Wiring Kit with over valve cover protects boots. The tubing without too much hassle cover and the best investments for the '87 i got last summer was winning! Does n't show the wires below the headers, will the covers from Autozone protect them the... And booties are available from the performance aftermarket 40 at the local speed shop, right the! Custom spark plug Wiring Kit with over valve cover as important as function its like 12 bucks for of. Is typically an alloy made of copper, nickel, and/or tin side them with some paint! And are value priced close to the covers you found look pretty nice, good choice.Be sure to some. Summer was a loom Kit that bolts to the heads and not the valve cover both vertical and horizontal.... Tested the spark plug to ignite the air/fuel mixture only real limitation is the size of his wallet welcome my. Them and attached tightly to the covers from Autozone protect them all the way to the G16B series and! Plastic or aluminum brackets that are installed to the valve cover the indiviual loom sets on top your valve?. Wasted spark arrangement of two coils bolted directly to the rear air assembly. Use tall stand-off brackets that are installed to the back of the bolts plumbing. 72195 Moroso high-temp under header or not 'll save you in the end in cases!