MillsMotorvation

Ok Ill give my setup.(14/15psi) 1981 TTA, 5.3, Ls1 intake, 706 heads hand port exht side,GT 45 trubo, 60lb inject,FMIC,and snow meth inject. LS6 cam& springs setup, and 7.450 pushrods, 3300 stallTCI, 3.08 posi, 295/55/15MTET, car weight3900. 3.5inch downpipe, spilit to 2.5 to duals.
So I have guys wanting to run me at the track for cash, Im thinking his car runs 6.0s in the 1/8. The best I cn get out of my car is 7.74298.9mph, with a 2.0/60ft. I launch with 4psi shifted at 6000rpm. Car has a TH350 trans. Now Ive tried the things that I know of. I have HPTuner, and was wondering what kind of timing I need at launch, any tunning info that will help. Also I ordered a 2step this week, can you tell me how to make the best of that. The best Ive got out the car is 11.60@129.9/ 7.85@100, bit thats with a 2.02-60ft.

71 chevy

iTrader: (18)

do you have a vid of the car launching?

silver_82

how much boost can you build on launch?

get more aggressive with the tune to help it spool. what are your current afr's and timing?

boostit5.3

iTrader: (3)

^^ what silver said be more aggresive at the launch are you pulling any timing at the start?

Sales@Tick

iTrader: (3)

There are numerous threads that have gone over this just in the past month or two. I'll see if I can dig some up.

Sales@Tick

iTrader: (3)

https://ls1tech.com/forums/forced-in...pool-time.html

https://ls1tech.com/forums/forced-in...-60-times.html

MillsMotorvation

Im new at tunning a ls but I can learn. A/R1.01 timing is 16.5@Wot. Never paid atten at launvh
Maybe 21. I can build 8/9psi before meth kicks on. Run 91/93 oct&meth.

Sales@Tick

iTrader: (3)

Do you have a log file from a run at the track?

Can you send me your tune?

WheelsUp84z

iTrader: (14)

Does the trans have a brake? I had mine at around 25* on the brake in the rpm range i wanted to launch at and around 12.5 afr. It would build 10lbs on the footbrake without the 2 step pretty easily.

MillsMotorvation

Think I can load a tune on here.This is a pass. my MPH stop working, and the WB on screen dont match the one in the dash, anyone can help? On this pass it ran 11.65@129.9, and 7.85@100 mph, annd 2.0 60ft, this is a pass in the street, with a Gtech. So traction was limtited.

6.0mustang

iTrader: (2)

28x10.5 MT stiff sidewall slicks(12psi). 3.42 gears. tbrake 3800 stall. what shocks in rear?

Sales@Tick

iTrader: (3)

I need the configuration you're using to log these runs with.

MillsMotorvation

Got my 2step, hope it helps. This is the HPtuner config. Car has stock shocks and TH350

BAKED

iTrader: (14)

Pull some weight out of that pig! That will help you 60' better for sure

Sales@Tick

iTrader: (3)

Those stock shocks are also killing your 60'.

You have to be able to control weight transfer and control the separation of the rear suspension.

You cannot have a car that squats in the rear as it picks the tire up while the body pushes down.

You want the tire to push down into the ground planting itself and the body to move up away from the tire as it plants.

Having too much separation or too violent separation will either put the car into a wheel stand or just crush the tire and be inefficient. You want to be able to slow down the hit of the tire with extension of the shock and then control how it stays stuck once it does plant with compression.

With a single adjustable you cannot adjust compression separate from extension. You're adjusting both at the same time which on a radial is not conducive to fast 60' times.

I have double adjustables on my nitrous race car and it is probably one of the most important tuning tools I have while I'm at the track. They have made my car extremely predictable and consistent after I learned what the car wanted with the current suspension set-up(instant center, anti squat percentage etc.) and able to get me 1.29 60' times every single time.

MillsMotorvation

Thanks a lot, will look into better shocks. I want the car streetable. Took me forever just to remove the front sway bar, but it helped alot. Thanks for all the replys. What budget friendly shocks should I try?

Sales@Tick

iTrader: (3)

QA1's or Strange single adjustables will most likely be your best bet.

If you can swing the Strange double adjustables that'd be the best budget friendly modification you could do no doubt.

MillsMotorvation

Thanks, will check it out.

mterveen

iTrader: (2)

so do you want the rear DA shocks set as hard as possible on the compression? where should the rebound be set (hard, middle, soft?)

Sales@Tick

iTrader: (3)

That will be entirely set-up dependent.

You'll want to start with the compression 1/2 from full tight and the rebound 1/2-2/3 from full tight.

If it plants the tire violently and goes into a wheel stand you want to tighten the rebound.

If it shakes on the hit tighten compression and/or raise air pressure.

If it hits the tire like you want, but spins more than 20-30' out you need to tighten compression.

If you have the rebound set closer to full tight and when it plants the tire it bounces like a basketball you need tighter compression.

These are just a set of very simple guide lines to follow.