Dragaholic

iTrader: (180)

Just like the title says. Please list what tranny you have, converter, rev limiter, shift points, rpm you pass traps at, and if you're naturally aspirated, nitrous assisted, or have boost. Thanks.

SUX2BU

iTrader: (14)

TH350
Turbo action 8" 5300
7,400 rpm rev limiter
6,000 rpm shift point(right now still experimenting)
not sure what i pass the traps at but its 96 mph in the 1/8
N/A stock internal.

cablebandit

iTrader: (37)

346 15psi of boost
4l60 3800 Vig multidisk
3.23 gear 26x10x15 tires
136-137 traps
6500 rev limiter...shifting around 6200...lock converter in 3rd...cross traps around 6k I THINK

Dragaholic

iTrader: (180)

SUX2BU, you left out your gear and tire combo which was the main thing I was looking for.

Pro Stock John

iTrader: (34)

T400
TCT 9" converter for FI
7300 rev limiter
6600-6800 shift points
Trap 6800-7000 rpms
3.50 gear
28x10x15 slick
143-144.6mph trap speeds

348ci + big boost (18-21 psi)_

MADMAN

iTrader: (4)

3.50 gear 3000stall 29.5 NON w tire 8150rpm 169mph.

kevredz

iTrader: (2)

Th350
3800stall Edge Racing, 9.5"
6600 rev limiter
6200 shift points
cross the 1/4 line at 6300rpms
121-124mph
naturally aspirated
26" MT's
3.73's

SUX2BU

iTrader: (14)

Oops sorry
26x10.5x15 ET Drag
4.10

So Slow

iTrader: (2)

Turbo 400
5000 Stall Vigilante
7400 Rev Limit
7000 rpm Shiftpoints crosses traps at 7000 rpm
N/A
118-121 Trap speeds
28/10.5/15 ET Drags
4.71 Gears

12secSS

iTrader: (30)

TH400
B&M 8" 4600 stall
7300 rev limiter
6400 shift points
6800 rpms through the traps
4.33 gears
28x10.5x15 ET Drag, will be going back to a 29.5x9.0x15 ET Drag
123 mph trap speeds
346ci N/A stock short block

Dragaholic

iTrader: (180)

Anyone out there running a 4.56 or higher?

So Slow, what kind of setup do you have on your motor? Cam only, H/C, Stroker, etc.?

BKHAWK1

TH400-3speed
ATI 4000 stall 8"
reverse pattern manual valve body
6800chip in shft light
rev limiter 7000
forged FMS 346
200shot TNT power ring
28x10.5x15R going to a W
M/T DR's 325x60x15 =28"
373's
cross traps at 6600
130-135mph
1.39-1.41 60'

So Slow

iTrader: (2)

Motor Built by Jason Reibert at Thunder Racing
- Diamond 3.905" bore pistons (11.0:1 compression)
- Manley 6.125" connecting rods (LS1 On-Center)
- stock, polished crank
- JE 3.905" rings (1.5/1.5/3mm; standard tension)
- Federal Mogul bearings

- GTP stage 2 5.3 truck heads (2.02/1.57 valves; milled .030")
- Crane dual springs/Titanium retainers
- TR 7.350" pushrods

- Thunder Racing 236/242 .602/.610 114 lsa/110 ICL

Fast LSX 90mm Intake/90mm TPIS Throttle Body/Pace 85mm MAF
ASP Crank Pulley
Magnacor ignition wires
NGK TR-6 Plugs

Coated Hooker Long Tube headers /Dynomax Bullets
Geoff Skinner custom tune in the PCM By Thunder Racing (Speed Density)

Mezier Electric Water Pump
Motor made 414 RWHP at 461 lb.ft of torque

I am fixing to put a set of 4.86's in the car soon..I think during the hot summer months with my combo a 4.86 would be ideal and the 4.71's would be right for winter months..

12secSS

iTrader: (30)

I believe Coach uses 5.13s and 30" tires.

Dragaholic

iTrader: (180)

Well the biggest tire I wanna run is a 29.5x10.5x15, but if it really isn't necessary, then I don't wanna spend the extra money for them and have more work for them to fit. It seems that most people using 4.56 gears are running 28x10.5 ET Drags. I dont know for a fact, despite what caculators say, I've seen most people running the 4.56/28" slick combo. I'm thinking the 29.5x10.5 is too much tire for a 4.56 gear. I may be wrong though.

Pro Stock John

iTrader: (34)

4.56 and a 28x10.5 might mean going thru the lites at over 7200 right?

Dragaholic

iTrader: (180)

I dont know cause I dont have personal experience with either one of them and if that's the case, then its not enough tire because my limiter is a 7200 with 7000 shiftpoints.

Ben R

Depends on the MPH.

Dragaholic

iTrader: (180)

Ok...I used this calculator to figure some numbers:

http://www.f-body.org/gears/

With the old setup which consisted of a Yank PT4400, 4.10 gear, 26x10x15 ET Drag, 7000 rpm shift points, and a 7200 rpm rev limiter, I would cross the traps around 6800-6900 @ roughly 125. According to the calculator at 6900 rpms it shows 130 mph which is off by over 5 mph. I know I know, the calculator doesnt accomidate for tire growth or converter slippage.

With a 4.56 gear and a 28" slick at 6900 rpms it shows 126 mph.

With a 4.30 gear and a 28" slick at 6900 rpms it shows 134 mph.

With a 4.56 gear and a 29.5" slick at 6900 rpms it shows 133 mph.

With a 4.30 gear and a 29.5" slick at 6900 rpms it shows 141 mph.

Now I have a 7200 rev limiter, so I could be looking at 7000 rpms which there's no problem crossing the traps at that speed and it would bump all the trap speeds up 2 mph. Anyhow with the old setup, there was about 5 mph slippage because I was passing at roughly 6900 with a 124.5 trap speed and the calculator shows 6900 with a 130 trap speed. So let's say that the new converter had just as much slippage as the old converter and subtract 5 mph from the calculator, I would want to be looking for something in the 135 mph range so that I can really go 130 or so. That would probably be the maximum that a cam only setup will see in an automatic. So with that in hand, a 4.30 and a 28x10.5x15 would work or a 4.56 and 29.5x10.5x15 would work. What do you think would be best?

Ben R

Now that you know which gear works with what tire, you need to decide which tire to use.

The bigger tire will make the car a little more consistant, especially if you're at the track on a night when the prep is sub-par.