LS Build Disappointed
Thread Starter
Teching In
Joined: Mar 2014
Posts: 19
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From: Monticello, MS
LS Build Disappointed Hey guys I managed to get my car to the track after years of buiding and working out the kinks and am quite disappointed with the results and regretting the way i went with the engine build. With the specs below I ran a best of 11.6x 1/4 @ 122 7.3 1/8 with a 1.59 60 ft. I am just curious as if this is an ideal time for this setup. Specs below. I will admit the wideband was reading 10.8-11.0 afr at full throttle, not sure how much this would affect it.
1996 Camaro- Approximately 3500 lbs
LQ4 414 Callies Dragonslayer Crank/Compstar Rods
317 Mild Ported Heads flowed 279/200
Comp .614 .621 227 235 113+3
Diamond Forged Pistons 11:1 measured 10.6 compression after porting
Fast 102mm LSXR
1 7/8 Speed Engineering Long Tubes with y-pipe and single dumped bullet
4L80E with transgo shift kit
Yank SS4000
Moser 9" Rear With 4.11 gears
Relocated LCAs
Spohn Tunnel Mount Adjustable Torque Arm
28" MT Pro Radial
1996 Camaro- Approximately 3500 lbs
LQ4 414 Callies Dragonslayer Crank/Compstar Rods
317 Mild Ported Heads flowed 279/200
Comp .614 .621 227 235 113+3
Diamond Forged Pistons 11:1 measured 10.6 compression after porting
Fast 102mm LSXR
1 7/8 Speed Engineering Long Tubes with y-pipe and single dumped bullet
4L80E with transgo shift kit
Yank SS4000
Moser 9" Rear With 4.11 gears
Relocated LCAs
Spohn Tunnel Mount Adjustable Torque Arm
28" MT Pro Radial
TECH Veteran
Joined: Sep 2014
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From: Mississippi
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Very true, but in this case his a/f is pig rich, the heads are subpar, cam is rather small, and compression could be higher. Combine all that I still think he did decent, especially considering the weight
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Verdad Gallardo Thread Starter
Teching In
Joined: Mar 2014
Posts: 19
Likes: 0
From: Monticello, MS
As far as the tune the tuner gave it a base tune because the transmission was shifting through the gears immediately cruising and said the converter felt extremely loose. After that i spent some time on the street tweaking part throttle shift points and it drove pretty well and thats when i made some track passes. I then returned to him and on the dyno he selected manual third and whenever he made a pull i guess it let go. It ramped up to around 250 rwhp and pegged the limiter. Not sure if it was converter or trans but I have a brand new jakes performance level 3 4L80E with transbrake and a PTC nitrous converter to go in. Timing is around 25 degrees WOT and and knock sensors were pulling up to 8 degrees around 5000 rpm which i assume is false knock i have not determined that yet.
I think once the afr is fixed the trap speed will go up a couple of mph which isnt too far off for an auto with a 9" rear. The cam and heads are very conservative for that build IMO
Staging Lane
Joined: Jan 2016
Posts: 66
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Not sure why everyone's saying the heads and cam and a/f ratio are the problem when you hit 122mph. The power is there.
It seems your take off is hurting your time - big time. If your 60 ft time was just 0.1 of a second quicker, you would've ran a 10.7 (approx) according to an online 1/4mile calculator.
I've also had mates run high 10's with lower top speeds (same car weight).
Maybe heat up the tyres more next time before the run or lower the psi in them..
It seems your take off is hurting your time - big time. If your 60 ft time was just 0.1 of a second quicker, you would've ran a 10.7 (approx) according to an online 1/4mile calculator.
I've also had mates run high 10's with lower top speeds (same car weight).
Maybe heat up the tyres more next time before the run or lower the psi in them..
Originally Posted by ChevFTW
Not sure why everyone's saying the heads and cam and a/f ratio are the problem when you hit 122mph. The power is there.
It seems your take off is hurting your time - big time. If your 60 ft time was just 0.1 of a second quicker, you would've ran a 10.7 (approx) according to an online 1/4mile calculator.
I've also had mates run high 10's with lower top speeds (same car weight).
Maybe heat up the tyres more next time before the run or lower the psi in them..
It seems your take off is hurting your time - big time. If your 60 ft time was just 0.1 of a second quicker, you would've ran a 10.7 (approx) according to an online 1/4mile calculator.
I've also had mates run high 10's with lower top speeds (same car weight).
Maybe heat up the tyres more next time before the run or lower the psi in them..
Put the same top end and mods on both the 346 and 414 and there will be little difference. I still think the trap speed here is pretty much on for the mods, a/f, weight, etc...
Staging Lane
Joined: Jan 2016
Posts: 66
Likes: 0
When people ask you "what does your car do on the quarter" you don't answer back "xxx mph". You tell them the time.
Very strange.
"Any" car, any motor... 11.6 is a slow time for a 122mph trap.
He should be in the 10's (with slicks).
Like I said, my old mates ran high 10's with slower top speeds (with different engines, not LS1's) and have noticed hundreds of other cars running very similar times and mph to them.
His main problem is his launch.
Like I also said; if he cut his 60 ft time by just 0.1 of a second, he will be in the 10's. Almost a second improvement in the quarter.
He should experiment with tyre pressures, heat and engine RPM when launching and not put the blame on his engine/setup.
Don't know how anyone can even slightly disagree with what I'm saying.
Hey guys I managed to get my car to the track after years of buiding and working out the kinks and am quite disappointed with the results
This is the definition of mismatched parts thrown together into an engine.
TECH Veteran
Joined: Sep 2014
Posts: 4,893
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From: Mississippi
Stroke eats duration.... a 227 duration cam in a 4 inch crank is useless. Cam would be nice for a stock cube LS1. Look across the board and see most guys runnin 240 minimum cam in a 402 plus cube motor.
that's damn right! 227 is perfect blend of power and drive ability on a 346. I'd go something like 240/246 on a 113 LSA for a 402.