Well we dynoed a H/C stalled auto car with truck coils and did multi pulls so we whould not have any fluke pulls and the results speak for them self. The plugs were gaped at .050 ngktr55 if the trck coils were beter they whould deff show on the .050 gap
TRUCK COILS 374.41 STOCK COILS 375.20
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1994 Z28 Ls1 Swap CAM ONLY 10.38 @ 129.5
1998 Z28 440LSX Beck Sheet metal intake , Fast XFI ...Under Construction
Last edited by SSPerformance; 10-23-2009 at 09:11 PM..
Dont ruin this for everyone!!! Im waiting to see "Truck coil swap" in peoples sigs...
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Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
Coils don't get "weak"..either they're good or they're not... This is one test result vs. how many??? How many times have we seen guys go from an LS6 mani to Fast 90 and posted a loss and other's have picked up 14+/- hp&tq.
i never knew truck coils would really show improvement on a low HP car like this anyways? i always hear they were only beneficial in the high HP applications.
__________________ Upstate F-Body of SC Comp 232 cam, LTs, true duals, 4.10, HP TUNERS. 377 rwhp
this seems like an accurate result-i really can't see changing coils adding power unless there is another ignition problem.If the coil is lighting the plug and firing the cylinder there is no more power to be had through ignition.
__________________ www.virginiaspeed.comcustom engines for street or race,tuning,installs,fabrication. check our our online store-i'm adding new products every day http://shop.virginiaspeed.com/main.sc757-468-5101 1979 Z28 Outlaw 10.5-670bbc twin promod 94's Crew Chief,engine builder,tuner of Phil Thomas's
LSX powered Mustang"The Renegade" 7.29, 198mph-best 1/8 et.4.70 @ 164mph 315 radials at 3275lbs
I dont think he is kidding at all. Im the one that started the last thread showing a gain from swapping coils.
Please tell me what I have to gain by that? Do you think I have a shed full of used coils Im trying to sell?
I simply posted the results we saw from one test. Thats all. Do with it what you will.
__________________ 1990 Ford Mustang "7-up" convertible.
LS3 416 stroker build in progress. L92 Heads. Comp Cam. Lots and Lots of giggle juice.
Performance Innovators of the Mid-South
6258 E. Shelby Dr. Memphis TN 38141 www.spectaclesolutions.com
The numbers don't lie guys... Some people have no idea about stalled autos and dynos
Lock the converter
FWIW, Jeff @ Spectacle was merely posting some results he found in his shop. There's nothing to gain from posting HP gains from a truck coil, unless you're a GM parts dealer. So there's absolutely no reason to make direct or indirect comments about anyone making false claims, or claims for personal gain. They simply posted feedback on it.
Carry on.
PS- For the record, I've never thought it was worth the swap either.
FWIW, we tested my car back to back getting it ready for the last rental... In hopes of making the most possible power, I ended up gaining like 10 average hp under 5,000 rpm, but lost over 5,000 rpm by ~10 hp I think... So, back to stock coils for me, as my car really never see's sub 5,000 rpm at the track.... We did the baseline, swap to trucks, then swap back and the only time it lost was with the trucks. We did 6 pulls.
__________________ 10.95 @ 125.61 1.46 60', best 60' 1.42 Granny shifting 2000 SS 6 speed Patriot Heads/ torquer II/ MONSTER Clutch (Stock pistons Not flycut, stock bearings, stock crank, stock rods, stock oil pump, stock main caps, ARP rodbolts!!!) 439 rwhp/ 394 trq Mustang Dyno Tuned By Brian @ Kaltechwww.kaltechtuning.com H/C combo for sale:http://www.ls1tech.com/forums/lsx-pa...sec-combo.html
Truck Coils MYTH PROVEN INSIDE 
