Ls1 irocz first Track run: Updated
#1
Ls1 irocz first Track run: Updated
After a year long build finally took my 1987 iroc to the track. It's a full weight car with the following mods.
2000 5.7 sbe
243 heads. Home ported. Shaved .025
224/224 .600 .600 112 lsa cam
fast 90/nw 92
ati 10%
long tubes
yank 3600.
410 gears.
DA was at 2600 ish for both passes.
Air temp 94 degrees 85% humidity
First pass whent 11.81@112.73
second pass whent 11.71 @ 112.50
Edit: second pass whent 11.77
car pulled great till the 1/8 mile then fell on it face. Feels like it's running out of usable rpm with the baby cam. Overall though it ran well considering the horrible track conditions.
Update:
Got another crack at this in decent weather. The only changes are a meziere water pump.
I think this is about as fast as this car is going without major changes.
2000 5.7 sbe
243 heads. Home ported. Shaved .025
224/224 .600 .600 112 lsa cam
fast 90/nw 92
ati 10%
long tubes
yank 3600.
410 gears.
DA was at 2600 ish for both passes.
Air temp 94 degrees 85% humidity
First pass whent 11.81@112.73
second pass whent 11.71 @ 112.50
Edit: second pass whent 11.77
car pulled great till the 1/8 mile then fell on it face. Feels like it's running out of usable rpm with the baby cam. Overall though it ran well considering the horrible track conditions.
Update:
Got another crack at this in decent weather. The only changes are a meziere water pump.
I think this is about as fast as this car is going without major changes.
Last edited by wph351; 04-30-2018 at 10:40 AM.
#5
Here are the slips of both runs. The mph is disappointing. I was holding the car in 3rd for fear it would shift just before the finish line. I'm thinking I shold have let it go into 4th. It was completely out of steam the final 200 ft or so. I don't know what rpm I crossed at, but it was definitely past a good useable rpm.
Last edited by wph351; 06-13-2017 at 05:32 AM.
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#10
#11
I don't know about the timing, I don't have a data logger or any tuning devices. I'm running a basic street tune by Steve Williams at efi performance.
I can only go as quick as 11.50 at my local track before they require cage work and additional safety equipment. I plan on going down in the fall and testing how steadfast they enforce the rules on test N tune sessions.
I'm SURE the weather conditions cost everyone .2 ish that day. The conditions were awful for drag racing.
#12
10 Second Club
What size tire? I'm running 26" with 3.73 and cross in 3rd at 6200 rpms with a yank ss4000. Probably need a 28" tire for 4.10s if you aren't spinning it high.
#13
what mph are you crossing at?
#14
10 Second Club
With stock cam and heads 113.5 with good air. I went low 114 a couple weeks ago with ls6 cam and 2000' da. Should go 116 in good air, but will be really close to shifting to 4th. I liked the 3.42 when I had it.