1989GTATransAm

iTrader: (3)

Ok here is the deal. Two cars dyno'd exactly 350rwhp and the curve on the dyno is virtually the same. Weight of the M6 car is 3650. The weight of the Auto car is 3750 both with drivers.

One car is an M6. The other car has a 700R4 with shift kit and Yank SS3600 stall. Both cars will be shfting at the 6000rpm mark as that would provide the best power under the curve in each case. The automatic car has 3.70 rear gears with a nine bolt and the M6 car has 3.90 gears with a Ford nine inch. Both have posi-traction with the same suspension mods.

Which car will be faster in the quarter mile? By the way this is a for real scenario to be played out at the track in a few weeks.

speedracer0626

I would have to say that it would come down to the driver. Sounds like a good match to me. Drivers race. Let me know how it turns out

online170

tires and wheels?

1989GTATransAm

iTrader: (3)

The M6 has M/T ET Streets 255/16 on stock rims. The Auto has M/T ET Street Radials 255/16 on stock rims.

5678TA

it comes down to wheel and tire combo and drivers.. if both hook up, the manual with a GOOD driver should take it..

more gear in the manual=faster acceleration.. but if the stick driver is a normal driver forget about it.. you need to be a good driver to outrace an auto..

fastfbody

iTrader: (4)

that stall should make the auto walk the m6. thats a very serious stall.when all i hade was a stall on my 98 there was no m6 cars stock\lighty modded that could get near me.

atc3434

iTrader: (4)

+1 for the stall/auto for the win. Hard to beat a well setup auto out of the hole, should give it more than enough to stay in front for the 1/4 miles with everything else being so equal. The M6 car may trap a little high, but I think the 60' is gonna make or break this race.

Zepher

iTrader: (1)

My money is on teh Auto. I know what a stall can do.

5678TA

ok i guess i can re-word my guess.. if the 60fts are the same, then the manual should take it.. but only with a good driver..

i've chased down a 69 camaro that went 12.5.. she pulled a 1.60 60ft to my 1.8x.. i slammed my gears and caught her maybe 5 feet after the finish.. she caught the red light by .15 so i won.. so a good driver can/will be the difference in the manual..

DIGGLER

iTrader: (1)

if the manual car had more gear i would give it to him.... but i think he might bog with the 3.90's/t56.

5678TA

it shouldnt bog that bad.. i'm roughly around that power with the same gear and trans ratio and i dont bog..

ok nevermind.. i dont bog because i kill my tires off the line..

DIGGLER

iTrader: (1)

yea i know of a couple cars that have a pretty good bog with similar power and gear. still 1.6x 60's, but a bog when they do it.
im thinking the auto will be quicker to the 330', at least.

fastfbody

iTrader: (4)

never bogged my m6 supercharged lt1 ta 400rwhp 400ft.lbs 6psi and a exhaust all stock besides that. but i was pulling 1.9 60 ft spinning my car to the rev-limter in 1st and almost spinning all of 2nd drag radials arnt made for stock supension 400hp cars.i got a 1.59 60 ft with et drags no bog just neck breacking launch.

should be a good race but the stalled auto should have him by a car or 2 if the m6 is driven like a raped ape. if not 3-4 car win for the auto.all hes got to do is slam it and go the stall will do the rest.the stall wont let it come down from the power band so he will be makeing that 350rwhp the hole time. the m6 is fadeing from 225rwhp-350rwhp as he changes gears.

1989GTATransAm

iTrader: (3)

That is pretty much what I was thinking. The Yank SS3600 has a nice stall extension so the car will be pretty much in the power band all the way down the track. I can see a one or two car length at the end.

Usually with both motors putting out the same power at the flywheel the auto will see a bigger rwhp loss than the M6. However in this case the auto is making the same RWHP as the M6.

That would mean that the auto is making more flywheel horsepower.

DIGGLER

iTrader: (1)

not a real good comparison to a 350rwhp n/a car. ~80ft. lbs less torque....
my LS1 camaro with ~376rwhp and 4.30 gear with a 6200 dump on et streets didnt bog either. 1.53 60's with some tire spin.
fwiw, my car ran 7.44@93 in the 1/8. around 3400-3500#.

fastfbody

iTrader: (4)

i was jokeing not compareing.

Dyno Don

iTrader: (7)

The M6 car has a 2.97 1st w/3.90 rear gears. I don't see any bog here

Kevin91Z

iTrader: (1)

It might depend on which car has more horsepower under the curve. Or it might just come down to the driver and his ability to make the car hook.
Either way, I tuned them both on the dyno, so for a few dollars more, I can detune one of them.

TTA 1387

Was the converter locked on the dyno? If not, the A4 car will destroy the M6 car.
If it was locked, more than likely a very good race. The A4 car will get a huge advantage off the line but run out of steam as the M6 charges in the back 1/8.

1989GTATransAm

iTrader: (3)

Converter was unlocked.

We are going to have a NorCal versus SoCal 3rd gen shootout at Famosa Racetrack North of Bakersfield on June 2nd. We will know the results at that time.

We were preparing our cars for the race and during the dyno tuning noticed the uncanny similarity of the rwhp results between the two cars.

ShiftyCapone

iTrader: (7)

Both of these combo's are in 3rd gens right .

The auto will get the jump off the line and should cross the stripe first. If the race were to go past 1320 the M6 would pull and eventually pass. That is my prediction.

1989GTATransAm

iTrader: (3)

Yes both third gens. The auto is a GTA and the M6 is a late RS.

TTA 1387

You are putting out a lot more power than the M6 car. Lock the converter and you'll probably pick up 20-30rwhp/rwtq, if not more.

If both cars can hook respectively, you'll easily have .5 second on him.