thegooseman

Last night I went to Irwindale and for myself had a big improvement of three tenths of a second just by putting in the stock injectors and stock tune! I got to go three times last night and this is what I got.

First run
60'...2.113
1/8...9.534
mph...73.61

Second run
60'...2.177
1/8...9.599
mph...73.69

Third run
60'...2.150
1/8...9.527
mph...74.22

This was done with K&N filters, SLP runners and edelbrock baseplate, SLP 1 5/8 headers with Dyno Don y-pipe and magnaflow catback (duel cats)

For my suspension I have black poly thouout the whole car, granetelli control arms, some tubular panhard rod i got off eBay and TDS subframe connectors welded in.

The car has 181.xxx miles and it and the gear ratio is 2.77 9 bolt

1989GTATransAm

iTrader: (3)

"The car has 181.xxx miles and it and the gear ratio is 2.77 9 bolt"

IMHO that is one of the things holding you back. You need to change the gear ratio.

thegooseman

You mean its not the 305? I do want to change the gears.

Red87SC

i really need to get my TA out to Irwindale before it starts getting warm again!

I'm hoping for mid 8's

thegooseman

I just started going and its a lot of fun. Some guys talk about a in between get together from meetings and I think this would be an awesome thing to do. I'm going again this Thursday.

ZexGX

Nice times... You finally beat my V6! Get some better gearing or a different rear end and see what it'll do.

thegooseman

Bump for Irwindale tomorrow!

thegooseman

*update*
My first run of the day is also my best one to date.
60'...2.111
330...6.143
1/8...9.467
MPH...74.45

My second run I decided to take off the air lid completely to see if it made a difference, so it was an open throttle body. The 1/8th ended up being 9.542. That cold air does make a difference!

ZexGX

Nice! Did you do anything different this time when launching?

TPI TERR

iTrader: (9)

lee.. may i ask who said this.

"that one dude with that one fourth gen with a stock motor and trans that looks like it's confused and has ugly exhaust tips and is really slow"


LOL

ZexGX

It's just something I made up. The fourth gen thing is true, and it having a stock motor and trans is true. Some dude from Thirdgen.org at Irvine Cars n Coffee said my car "looks confused" because of the TA wing and the Raptor hood. The exhaust tips thing is a mix of what people say and what I say, and the really slow thing is me being a smartass.

thegooseman

No, just the way I always do it. Go figure.

thegooseman

Ok I got the new 10 bolt in with 3.42's. Lets see how I do tonight. Plus anybody else interested in going? It would be nice to see some more thirdgens there.

thegooseman

Ok sorry to of taken so long but here are the results

first run
60'...2.264
330...6.264
1/8...9.575
mph...73.75

second run
60'...2.095
330...6.126
1/8...9.446
mph...73.55

third run
60'...2.125
330...6.171
1/8...9.513
mph...72.92

fourth run
60'...2.091
330...6.095
1/8...9.452
mph...72.28

To be honest I'm a little dissappointed. I didnt do anything different from the other times I have been there before. Sure I got a couple 9.4's and a 2.0 60' but I was thinking I would be running 9.3's maybe 9.2's after the gear swap.

The only thing that is different on my car are going from 2.77 gear ratio to a 3.42, and 17inch Zr1's with nitto drag radials on the back. I definitely thought the tires would of helped too. I guess thats what I get for having a 305.

TPI TERR

iTrader: (9)

not bad my near stock tpi i ran a 8.9
it had a ol school (jet perf) chip, flowmaster a overhauled kit on the 700-r4
and bbk tb.

///DAN///

iTrader: (1)

were the tires you switched to bigger , that may have evened out any gains going to a taller tire .If they are bigger try switching back just to see the difference in the two.

thegooseman

I was thinking about trying my old tires this week to see if it makes a difference.

Z28FAST1

Are you spinning or bogging out of the hole. If you are bogging you definitely need a stall in there and should be able to get 8.9's!! Keep us posted.

thegooseman

Ok I got my new best tonight.

60'...2.014
330...5.975
1/8...9.289
MPH...73.18

Things that have been changed were a new red poly trany mount and this is the fourth time replacing it. LS1 aluminum driveshaft, and March underdrive pullies. I only put on the crank and water pump. I’ve been meaning to get on the alternator but haven’t had time. For the record I have no problems with the pullies. Not even during the traffic I was in today going to the track. And the last thing was putting in a 180 thermostat. Funny thing is the previous owner put in a 160 and I thought the stock 195 was still there. The 180 is working quite well though.

I believe I can still make an improvement with my little 305. Ideas are an adjustable fuel pressure regulator, my SLP cold air intake I bought 3 years ago but never installed because I haven’t relocated the battery yet and the biggest thing is getting the shift points corrected. Since I had the transmission rebuilt the shift points have been too high and the guys at the shop can’t seem to get it down after a couple tries. Tonight it was shifting around 5500 to 6000RPM.

Here is my Dyno graph

joeblue83

iTrader: (8)

that graph does not look to healthy

thegooseman

Do you think it doesnt have enough hp for the mods I have? The powerband is falling off to early even for TPI? Both? Or something else?