My best run was a 14.137 @ 94.57 MPH on Mickey Thompson ET Street slicks. My best 60' was 1.999. Mods are in sig. Is this about what my car should run in the 1/4? What is/are the biggest thing(s) that are holding me back? What can I do to run at least 13.99? What will I have to do to run 12.99? Are 12s possible on a long-tube TPI design? I don't want NOS. Thanks.

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1984 Camaro Sport Coupe - 73K Miles, Rebuilt 355 TPI L98, Crane 2032 CompuCam - 214/220 @ .050", Crane adjustable fuel pressure regulator, MSD Blaster coil, custom burned PROM, stock TPI intake, Accel 24# injectors, gutted air box with K&N filters
F41 Suspension Package, 700R4 Tranny, TCI Breakaway torque converter, 3.27 Disc Brake Posi Rear
Hooker Shorty Headers, Catco High-Flow 3" Cat, Flowmaster 3" American Thunder Cat-Back
New Paint
Best 1/4 Mile Run:
14.137 @ 94.57 MPH

[This message has been edited by CamaroX84 (edited July 10, 2001).]

[This message has been edited by CamaroX84 (edited July 10, 2001).]

 

wow i run a 13.82 on basically a stock motor, i dont know what to tell you about running a 12.99 but i am almost sure its impossible without a power adder.

but good job, and keep up the work.

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Jarrad
1990 IROC-Z L98 350 TPI
TH-700R4
G92- 9 Bolt Borg-Warner 3.27gears
Bright Red Hardtop/ Grey Interior


DAILY DRIVER: 1991 GREY S10 2.5L/5SPD -FOR SALE.

 

Get an intake? Bigger TB? It seems your trap speeds are low indicating your hp is weaksauce. I run a 94mph trap speed @ 14.4. Only reason your running so quick because the torque and those slicks. Gut or remove your cat. If MAF get a bigger one. You need air flow it seems...anything that will improve airflow will definately help that cam, maybe heads too. That stuff and low 13's are gonna be in sight.

 

I guess it all depends on how much money you want ot spend?
First how many runs did you make?
Where ALL you 60' consistant? (2.01 +/-0.02?)
I don't know what a "F41 Suspension package" is??
What was your fuel pressure set at?

Lets just talk the cheap way and how to break into the 13's.
If you haven't ported the plenum Then do it!
If your fuel pressure was not set at 48 - 49 for the runs try that.
Base timing Was it set at 6*? Then try 8*. I run my setup at 8* and no problems.
Make a home made ram air for your setup. People have said it gives a .1 drop in times and more mph, maybe 1 - 2 mph.
You can also put a torque convertor lockup switch for racing again people say it helps by like .1 seconds and a 1 mph more.


Now some of these things are nothing but simple tuning tricks to find out for your car t run at its best.
They won't get you into the 12's! But it is a good base to start at.

I agree with the guy above You need an aftermarket intake but you will also need aftermarket heads or some real good porting done. With out these two things you will never see 12.99 except possiblly with a power adder or NOS! You have a 355 so the engine needs LOTS of air! Oh you'll need aftermarket runners too!
The last thing I would recommend is a adjustable torque arm, if you don't have it get it! Spohn has a real nice one. And you should be able to keep your 60' times under 1.99 consistantly. And then LCAs and SFC if you don't have them.
And after you get the heads and intake and runners more custom tuning of your chip will be needed to get the most from your engine.

Your trying to do the same thing I'm doing but I'm trying to do it with 2.77 gears !
Good Luck!


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89 IROC 350 Auto
MSD 6AL
Custom DUAL Exhaust
Edelbrock Performer 6085 Aluminum Heads
ZZ9 Cam
TPIS Level 5 Chip
And Free mods.
(stock intake, runners and suspension)

13.879 @ 98.90 mph (with 2.77 gears!)


Moderator of http://www.iroczone.com

Member of JFA Crew

 

Just to clear up something that was posted above. You cannot get a bigger MAF sensor for our cars. The one on there now is all you're gonna get.
bsa

 

Thanks for the replies. I had my fuel pressure at 48 PSI. At first the timing was set at 8* BTDC, but I changed it to 12*, which knocked off a couple of tenths. My car is speed density and I have a gutted air box. So with a bigger throttle body, ported plenum, bigger runners, a bigger base, and a set of AFR heads, what do you think I will be running? Thanks.

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1984 Camaro Sport Coupe - 73K Miles, Rebuilt 355 TPI L98, Crane 2032 CompuCam - 214/220 @ .050", Crane adjustable fuel pressure regulator, MSD Blaster coil, custom burned PROM, stock TPI intake, Accel 24# injectors, gutted air box with K&N filters
F41 Suspension Package, 700R4 Tranny, TCI Breakaway torque converter, 3.27 Disc Brake Posi Rear
Hooker Shorty Headers, Catco High-Flow 3" Cat, Flowmaster 3" American Thunder Cat-Back
New Paint
Best 1/4 Mile Run (with old LG4 motor):
16.760 @ 80.74 MPH

1992 1LE B4C Police Camaro RS - 305 TPI 5-Speed

 

I think you need to spend some time tuning. Unless you are running at altitude you should be getting more than 94.5 mph from that setup as is. Even though the stock intake and heads are a definite restriction, you should still be able to get a lot closer to 100mph trap speeds, even in hot summer air. Get serious with your tuning and i'll be you can knock a lot off your ET right there.

Beyond that, the intake and heads will both need to go if you want to take full advantage of that cam. You can get it into the 12s however you like, throw a power adder on it, or get serious with your top end. Tim Sifford ran 12.2 w/ a smaller cam than you on a stock L98 shortblock. AFR 190s, a miniram, 3.73s and a vigilante are the difference (and of course tuning).

------------------
Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
LB9 4L60 GU2 G80 - stock, soon to be sleeper
-=ICON Motorsports=-

- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die

 

What do you mean by "tuning?" I set the timing, checked the fuel pressure, and the spark plugs/wires are brand new. So is it possible to get into the 13s without making anymore purchases? Oh yeah, weather was not an issue. It was a cool night up in Wisconsin. Thanks for the help.

[This message has been edited by CamaroX84 (edited July 11, 2001).]

 

Also, do you think the 3.27 gears are holding me back? Thanks.

 

I believe Traxon is running in the 12s naturally aspirated however he does have a mini ram set up.

As for the TPI runner design. There was a video of a turbod 305 that still kept the TPI and it was running in the 9s. Willie on the power adder board is close to running 11s with his 305 and D1SC 3 core intercooled procharger.

Anything's possible, it's all down to how much you want to spend.

Rob

 

I think what Ed Maher is saying is the custom chip is not tuned for the best it can be. Hence "tuning" we mean the chip needs to be tweaked or tuned again for the engine to preform better. The "DIY Prom Board" has a load of info and you can start to program your own chips for under $250. It isn't hard just have to read about it.
If you do have a custom chip who did it? Did they program it for the 24# injectors, it does make a difference. The tuning of the chip is as important as adding aftermarket heads and intake. Too lean or too rich of an air/fuel mixture will kill your times. Plus if your running the timing 12* and the knock sensor doesn't kick in then you timing table for the chip needs to be readjusted.
Tuning for TPI engines means the chip most of the time.

As for your gears, I personally, do NOT think they are hurting you. I think Traxion had 3.73 gears and is now switching to 3.27 or 3.23 to be in the power band for his engine.
Good Luck!

------------------
89 IROC 350 Auto
MSD 6AL
Custom DUAL Exhaust
Edelbrock Performer 6085 Aluminum Heads
ZZ9 Cam
TPIS Level 5 Chip
And Free mods.
(stock intake, runners and suspension)

13.879 @ 98.90 mph (with 2.77 gears!)


Moderator of http://www.iroczone.com

Member of JFA Crew


[This message has been edited by Ski89Z28 (edited July 11, 2001).]

[This message has been edited by Ski89Z28 (edited July 11, 2001).]

 

I agree with Ski...changing plugs/wires/timing/fuel pressure is not tuning, that is "tune up". Tweaking the eprom is "tuning".

And Ski is right, its a LOT easier than everyone thinks it is. There is a LOT of things that a beginner can do right off the bat that will help and after a little of practice (and following some of the things we DIY'ers are doing), you can virtually do ANYTHING to your motor.

Just requires a little investment in reading on your part, purchase a few key items (burner) and then you can REALLY TUNE.

BTW, you don't even need to buy a scan tool. Craig Moate's has a scan tool he wrote for FREE. Just have to build a cable or you can purchase one. But I recommend building one yourself.

 

All you need is to either get your lower intake fully hand ported, and get some long tube runners or other air-flow intake mods.

Your 3.27 gears are fine for your powerband and that cam.

 

Thanks for all the help again. The 24# injectors were added after the chip was burned. I only went this big on injectors because two of my stock ones were bad and I eventually plan on getting a Super/Mini Ram. Could this be hurting me? How long does it take to learn to burn a chip and actually do it? Will burning my own chip bring me into the 13s? Thanks.

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1984 Camaro Sport Coupe - 73K Miles, Rebuilt 355 TPI L98, Crane 2032 CompuCam - 214/220 @ .050", Crane adjustable fuel pressure regulator, MSD Blaster coil, custom burned PROM, stock TPI intake, Accel 24# injectors, gutted air box with K&N filters
F41 Suspension Package, 700R4 Tranny, TCI Breakaway torque converter, 3.27 Disc Brake Posi Rear
Hooker Shorty Headers, Catco High-Flow 3" Cat, Flowmaster 3" American Thunder Cat-Back
New Paint
Best 1/4 Mile Run:
14.137 @ 94.57 MPH

1992 1LE B4C Police Camaro RS - 305 TPI 5-Speed

 

Oh yeah, one more thing. Could I have only been in the 14s because of my manually shifting of the 700R4? I just found out that you can't use a V6 tach on a V8 car. I have a V6 tach. So I was shifting between 5500 and 6000 according to the V6 tach. Could that be hurting me that bad? Thanks.

------------------
1984 Camaro Sport Coupe - 73K Miles, Rebuilt 355 TPI L98, Crane 2032 CompuCam - 214/220 @ .050", Crane adjustable fuel pressure regulator, MSD Blaster coil, custom burned PROM, stock TPI intake, Accel 24# injectors, gutted air box with K&N filters
F41 Suspension Package, 700R4 Tranny, TCI Breakaway torque converter, 3.27 Disc Brake Posi Rear
Hooker Shorty Headers, Catco High-Flow 3" Cat, Flowmaster 3" American Thunder Cat-Back
New Paint
Best 1/4 Mile Run:
14.137 @ 94.57 MPH

1992 1LE B4C Police Camaro RS - 305 TPI 5-Speed