Car is a 2008 LS3 Z51 Mods as follows

RPM 4L65E transmission
RPM Differential with 3.42 gearing
Yank 4000 SS torque convertor
LG G6X3 cam package
Milled LS3 heads pistons are fly cut
Under drive pulley
ARH 1 7/8 with cats
NPP exhaust installed by GM
Latest Mod below

Changed the cold air intake from Callaway Honker to Vararam with Wedge.

Also changed injectors from stock to 850CC from injector dynamics, changed the 6 year old AC Delco battery with a new AC Delco battery and retuned the car. The car was retuned by James with LStuner we started with 93 octane pump gas had a little Sunoco GTX 260 plus 104 in it. Then removed the pump gas and retuned with VP T4 100 octane. The 93 and 100 octane gas were both purchased on Friday 1/17/14. The T4 from VP fresh barrel delivered on Monday 1/13/14. Unknown when Exon delivered. Dyno results showed no difference in HP or torque using either the 100 octane or the 93 pump gas. Final dyno results were 490 RWHP and 438 Torque. The cost of T-4 was $11.00 per gallon whereas the Exon was $3.60. Bottom line for my mods I will be using 93 pump gas.

Next refilled the tank with the 93 octane that was removed earlier and went to the track. Got there 20 minutes before close, reduced the tire pressure in the hoosiers 315 X 17 from 35psi to 19psi and made 3 passes with the pump gas, new tune, vararam with wedge. Ran best 10.567 at 125.18 car was picking up MPH and ET was improving with each pass. The DA was around +1000. My best time with the Callaway was 10.60 in better air.


Back on December 28, 2013 went to Dallas Raceway with the listed mods but with the Callaway honker. The DA was around +300 at the track. Made three passes all on left lane best time was 10.621 at 124.73 MPH.




Don’t have a true comparison of the Callaway compared to the Vararam due changes to the injectors, the tune, and the track conditions and DA being different, but anytime a mod yields results at the track it’s a great mod for me.

Next mod either GTO spares or electric water pump. With the GTO spares don’t want to use spacers so will need to change out Z51 size rotors in front with the base C6 size.

 

Nice!

 

Very nice! I also have '08 LS3. Did a tune a few months ago. Just installed Vararam yesterday. Thinking about headers as next mod.

Those are amazing dyno numbers - 490 rwhp - that rocks. I would expect that kind of number from a supercharger package or something. Very impressive.....

 

Great results!

Who did the cam install and head and piston work?

 

I think 1 3/4" headers (no cats) w/3" X-pipe may give you more low/mid range torque for a better result. That converter is getting the job done.

 

I LOVE your set up. Ideally, I'm doing the exact same as you and am also in your area. We'll have to get together at the strip sometime.

Anyways, are you running your 315/17's on those TSW's out back? Are they 17x9's? Also, what made you swap out the 6L80 tranny to the 4L65?

 

Great ET and mph, and I bet the car sounds great with that LG cam. I sent you a PM/ question about Dallas Raceway.

 

Not only some very good times, but the consistency is impressive.

 

LG installed their cam package, then milled the heads were another mod completed by LG but not done at the same time.

 

Congrats, looking forward to it going even faster next weekend as the weather is looking better! Hopefully you can make it, we'll be out there including James...the skinnies will definitely be worth it, just ask JoeG

 

Sweet setup man!

 

Any help on the wheel specs and tranny info?

 

Wheels are TSW Nurburgring 17 x 9 19.2 lbs

The transmission was recommended by LG to go with RPM since that is who they use when building their race cars and have a good reputation. RPM could not get the 6L80 to be reliable for higher HP and multiple passes at the track and they were not even doing the rebuilds when I bought the 4L65. I bracket race and do 100's of passes per year so the transmission conversion made sense for me versus rebuilding my 6L80 that failed.

 

Gotcha. Thanks for the help. Have you tried using MT 315/35/17's or just the Hoosiers specifically?

 

And those 60 times....1.4+ is getting it done too!

 

I have used MT 305/35/18 heavier taller tire hooks well until you get to the wear bars. The Hoosiers recover better if you spin off the line, the MT's spin my experience.

 

Plan to be at the track this weekend, the GTO spares bought them with radial tires which weigh 34lbs versus 30lbs with bias ply. Still 6lbs less than current set up.

 

Hoosiers over the mickeys all day.

I could never get my 295/45/17's MTs to hook like the hoosiers and played with air pressure alot.

Btw why did you go with the ID850's? My car made 476 and im still in the low 80% IDCs

 

Which Hoosiers do you have exactly? Are they streetable at all? I'm just trying to decide on the best tire to throw on a set of 17x9's, and since the TSW's don't weigh much I was thinking of picking a set up to throw some MT 275/40/17's on there, but if the MT 315/35/17's will fit - I'll try them out. Though, you have me curious about Hoosiers now...

Are these yours?
http://www.summitracing.com/parts/hoo-17332/overview/

 

Those are the ones. They are a slick with two grooves.