LS4 Performance - Couple of runs at the track




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smokin06impala ss
05-28-2012, 10:04 PM
Well even though some people dont reply at all to my threads I really dont give a fck . I post up for current or future LS4 owners ...... Here are some pics and vids of last Wednesday track runs. Best time was 13.6 @ 101 Mph

http://i559.photobucket.com/albums/ss38/villalobosc/DSC_0968.jpg

http://i559.photobucket.com/albums/ss38/villalobosc/DSC_0967.jpg

http://i559.photobucket.com/albums/ss38/villalobosc/DSC_0966.jpg


Me vs a LT1
http://www.youtube.com/watch?v=SLudH6Wu35w
Friends Monte Carlo SS
http://www.youtube.com/watch?v=LoJiP7bg1cI
Me vs a 4door silverado( 6.0 cammed , Stalled, Heads , Intake , Tune )
http://www.youtube.com/watch?v=nmLNyICF3AY


Andrew91PGT
05-28-2012, 10:51 PM
Do you have any mods? Are those drag radial runs or street tires?

Panther427
05-28-2012, 10:53 PM
Very nice. How consistently were you running. Since that's one of the hard things to do with LS4 cars. How are you liking your current front tire choice


smokin06impala ss
05-28-2012, 10:54 PM
Do you have any mods? Are those drag radial runs or street tires?

They are drag radials and mods are CAI,magnaflow exhaust, LS6 Intake, D.T. Headers ,HP Tuned, TEP 3.29s . With a better burnout , Im sure I can get them to hook a better time.

smokin06impala ss
05-28-2012, 10:58 PM
Very nice. How consistently were you running. Since that's one of the hard things to do with LS4 cars. How are you liking your current front tire choice

Better than the Mickey Thompson ETs I had. I ran one 13.6 and two 13.7s @ 101 Mph. Before the 3.29s I was running 13.6s but in cold weather @ 103 Mph.

MillerMonteSS
05-29-2012, 12:02 AM
Do you think that you would get a cooler air charge by removing your driver's side headlight? I have seen people do it before, but I'm not sure how well it would work. Nice runs.

smokin06impala ss
05-29-2012, 12:04 AM
Do you think that you would get a cooler air charge by removing your driver's side headlight? I have seen people do it before, but I'm not sure how well it would work. Nice runs.

Thanks man, I did actually remove the headlight.

94ss06gxp
05-29-2012, 02:39 PM
what were your 60ft's?

smokin06impala ss
05-29-2012, 02:41 PM
what were your 60ft's?

2.16-2.19

JessmoMonteSS
05-29-2012, 02:45 PM
Nice runs man, get that 60' down and you'll see some good times!

94ss06gxp
05-29-2012, 07:11 PM
2.16-2.19

wow horrible, get them in the 1.7-1.8 area on some sticky tires and good DA and you might see a 12.xx slip.

smokin06impala ss
05-29-2012, 07:19 PM
wow horrible, get them in the 1.7-1.8 area on some sticky tires and good DA and you might see a 12.xx slip.

Nahhh..... I think the closest I will get on good DA would be a 13.3 maybe a 13.2.

baltsk8er69
05-29-2012, 08:12 PM
Yeah a 1.8-1.9 would get you around a 13.1-13.2. No 12s on that setup. But great runs. I would think 13.6s would come out of intake exhaust tires and tune. So I think your leaving some on the table. A little practice and you should easily be 13.2.

smokin06impala ss
05-29-2012, 08:20 PM
Yeah a 1.8-1.9 would get you around a 13.1-13.2. No 12s on that setup. But great runs. I would think 13.6s would come out of intake exhaust tires and tune. So I think your leaving some on the table. A little practice and you should easily be 13.2.

Yeah i definetlly need practice , plus it was very humid and hot ....

Density Altitude: 2035 feet
Relative Density: 94.18 %

DavidGXP
05-29-2012, 11:58 PM
Time for some more valve lift with all of that air flow.
I would either cam it, or install some gold race roller rockers from crane cams.
Even though your 60 ft times are hurting your ET, your ET is impressive! I am a little concerned with your mph though.. I would like to see 105 ish with your set up.
What Rpm are you shifting at and who tuned your car? Something is holding your hp back.

Panther427
05-30-2012, 01:29 AM
I'm curious too what kinda rpms are you pulling. At the end of your run. With the different gear ratio are you into third? At 100 mph.

smokin06impala ss
05-30-2012, 06:50 AM
Time for some more valve lift with all of that air flow.
I would either cam it, or install some gold race roller rockers from crane cams.
Even though your 60 ft times are hurting your ET, your ET is impressive! I am a little concerned with your mph though.. I would like to see 105 ish with your set up.
What Rpm are you shifting at and who tuned your car? Something is holding your hp back.

Rocker arms and springs are definetly in the plans .

I was hoping better Mph too but didn't happen .

I'm shifting at 6100rpm on first and second. And as for who tuned it , it was tuned by the trans guy . He changed the gear ratio and shift points since they were at 6500 before . Need to get a really good tune on it for sure .

smokin06impala ss
05-30-2012, 06:54 AM
I'm curious too what kinda rpms are you pulling. At the end of your run. With the different gear ratio are you into third? At 100 mph.

At the end of the run I has shifted in third gear and Rpm was around @ 4800.

DavidGXP
05-30-2012, 11:03 AM
Get your afr and timing tables checked. You have a lot more power
Hidden somewhere.

Thanks for posting your times!

DavidGXP
05-30-2012, 11:04 AM
Shifts are fine btw

smokin06impala ss
05-30-2012, 06:57 PM
Shifts are fine btw

Thanks for the feedback , hoping to get retuned next month then off to the track it is.

DavidGXP
05-30-2012, 07:42 PM
Search high and low before some rear spring blocks before you go back. Sticker tires will make traction worse, due to the ass end squatting and pulling the front end up.

DavidGXP
05-30-2012, 07:45 PM
I ment to say to search high and low for some rear spring blocks.

DavidGXP
05-30-2012, 07:49 PM
Remove as much weight from the rear ass possible too. Keep the front heavy!

turyg ls1
05-30-2012, 08:11 PM
nice run.. by the way i have some cuzins that live out there in mercedes tx and go to the track near there and whats funny on 1 of the pics looks to be my cuzin sittin in back of the tailgate and gmc truck looks like his brother...lol

Panther427
05-30-2012, 09:30 PM
Have you done the free dog bone bushing nod. To me it sounds like the trans guy only tuned the car to be safe with the rebuilt trans. Ie shift points and such. Or is that just my imagination

smokin06impala ss
05-30-2012, 10:56 PM
Search high and low before some rear spring blocks before you go back. Sticker tires will make traction worse, due to the ass end squatting and pulling the front end up.
I've been looking for some spring blockers , a while back CentexSS was going to sell me some but he never replied back. :(
I actually like my DRs over the Micket Thompson ETs I had.

nice run.. by the way i have some cuzins that live out there in mercedes tx and go to the track near there and whats funny on 1 of the pics looks to be my cuzin sittin in back of the tailgate and gmc truck looks like his brother...lol
Wow bro ........ what a small world and thanks.


Have you done the free dog bone bushing nod. To me it sounds like the trans guy only tuned the car to be safe with the rebuilt trans. Ie shift points and such. Or is that just my imagination

I have the poly bone and yeah I agree , I think he tuned it conservate. :thumbsdow

SSCoop
05-30-2012, 11:42 PM
Nice runs man! You have one clean Impala btw!!

blkchevyz
06-04-2012, 01:10 PM
Search high and low before some rear spring blocks before you go back. Sticker tires will make traction worse, due to the ass end squatting and pulling the front end up.

wouldnt some spring air bags work? id think you fill those things up you would stiffen up the rear alot. I know it sure helps to keep rear wheel drive cars from squating.