89fastlookinRS

Well I went to the track tonight. It was 39 degrees and a strong headwind. Everyone seemed to be running 4 tenths slower than normal. Here is my best run:

Re: .763
60ft: 2.35
330ft: 6.52
1/8 et: 9.94
1/8mph: 73.55
1/4 et: 15.39
1/4mph: 90.27

I beat a 85 IROC on this run with 305 TPI he ran a 15.56

The 4 tenths thing seems to be right on cause I put my mph in the e.t. calculator and it brought up a 15.01. Plus I got another chip going in with 350 injectors. Aaaaaand my 3000 rpm stall will be here on monday which should be good for 5 tenths or more cause I have no low end power. So it should be a mid to low 14 sec car on street tires.

steve8586iroc

Nniiiiccccceeee Tttiiiimmmmmeeeesssss

Low C1500

Not sure if a 3000 stall is going to make you any faster, but it will lwt you roast the tires.

89fastlookinRS

I'll have to work on the launches but with the stock stall i can't get off the line with this setup. The motor is all high end now, it sometimes tries to break em loose at around 3 grand more than punching it off the line.

iroc22

Those times can definitely be improved on. That engine should be low 14s.

Low C1500

What size injectors do you have, what pressure are u running?

Yeah I guess a car hooks better than a truck, so with that stall you'll still be planting down the power.

r90camarors

You should definetely be running better time with the mods you have done, and the potential is definetely there.
You have a limited slip, but with what gears? If you are running the stock gears, then that is definetely holding you back. I don't know if a stall converter will be worth .5 sec, but add gears to the equation and the likely hood will be much greater. I really think you will benifit from the chip as well, as long as it is a custom one, and not one of the off the shelf pos's. I agree with you though, you should definetely be a low 14 sec car after she is tuned.
Now, you might want to think about LCAs and relocation brackets if you're worried about traction...... Best of luck and keep up the good work Roy

Chuck!

Same setup as me, same problems as me.

2.412 60'
stock suspension/gears. My car doesnt start pulling until about 3k, too and by the time I catch traction its too late. It bogs then finally hits the powerband and Im approaching the 1/8th.

JPrevost

If you guys are running custom eproms (made by yourself) send them my way. I'd like to see what you've got and tell me what your base timing is set at. Those cars should be low 14's if I was high 13's with the 350, 2.2 60' and 102mph. The mph should be more like 96 to 98 with the 305 and your mods.
The bogging down low is most likely related to pump shot. You need to be generous if you've got an aftermarket intake. A vac.afpr would help cure this.

Dan W

What gears are you guys running?
How have you done your tuning?

These seem about 10mph slow to me.

Chuck!

Stock gears.
Stock tuning
Terrible track (Dragway 42)
Haha stab me in the face.

Although I do own a posi/3.42 rear and a pocket programmer 2 now. Hopefully over easter I can start programming stuff. Jon, can you clear out your pm box a little, I wanted to send you a message but it says you're full. Thanks man.

89fastlookinRS

I'm running 2.73's with a limited slip. I'm installing my 350 injectors tomorrow with a chip for the bigger injectors. I bog real bad off the line and still have a few high end bobbles that we're trying to iron out. I've been working with a buddy on the chip tuning. I've been running between 12-14 psi after the new fuel pump.

Dan W

Just a couple of notes for you guys...

I think JPrevost is right about the pump shot... I was very traction limited with my 350 TBI even at 6000 ft altitude. Thats with a 3.50 gear, 2100 stall converter, 219/227 cam and #7525 intake. My off idle acceleration did suffer until I got the pump shot right.

The mods you made really should not cost you any significant low end torque but I wouldn't expect any real gains either below 2500-3000 rpm.

You are a bit under geared. 2.73's are slugs behind nearly any motor.

I'd try to tune your low end before the converter swap... the converter is a good idea but you should fix the problem before the converter goes in and covers part of it up.

To get the rest of your power you may have to pump up the pressure with your 350 injectors... I think you will need something like 150# of fuel.

I dont know what all is going on with your valve train but valve float starting around 5500-6000 is a common problem with hyd rollers.

How are you shifting? Letting it shift itself at the stock 4500 ish shift point? Shifting manually? Retuned your shift points?

lanyabuddy

What is the part number for that intake? Because I know that the Edelbrock Performer has a direct replacement for the tbi intake manifold, but I didn't see any RPM one for TBI in the summit catalog?

Dan W

Most guys here choose to run carb type manifolds with TBI adapter plates.

There is no Performer RPM manifold for TBI.

brodyscamaro

yah, a heads cam intake LO3 running 15s, wow!

Chuck!

Dont worry, it'll be a 13 second na car this year. Have some faith

89fastlookinRS

No kidding, this is a long tuning process. This stuff doesn't just bolt on and make 300 hp out of the box. It's all about trial and error with our computer systems.
I am running the carb version of the rpm intake with a tbi adapter plate, then I took a dremel to the intake and tapered the top of the plenum to match the tbi openings. I will check on the pump shot deal, and see what I can do.
I know I can run low 14's, cause from a 35 mph roll I have run side by side with my buddies 14.1 95 GT. So my main problem is getting the low end dialed in. Looking at my old and new timeslips my 60ft's are almost identicle with my stock runs, but at the 330ft mark on down the track there is a huge difference. About 4 mph and 5 tenths all way from 330 to the 1/4.