Hi-Performance Lists

Aaron - adtke@email.msn.com - '91 B4C Camaro

I bought a 1991 Police Camaro that was equipped w/ the L98 and auto trans. 1st steps with the car was to get it running cool before I could do anything. The car was such a terd at first because it would not spin any tires. Culprit was timing; it was 20 degree's retarded. I bumped it up to 8 degree's. Exhaust was junk so I replaced it with Flowmaster cat back system. This is where I baselined the car at the track. Best was a 14.49 at 95.5 mph. Next mods came several at a time. New Rapid Fire plugs, Accel Cap and rotor, new factory GM plug wires, underdrive pullies, K&N's, airfoil, and removed the bumps in the plenum behind the throttle body. Took it back to the track(Speed world in Sun city AZ). First run was massive spin off the line so I let off the gas a little and trans upshifted into 2nd. Stomped the gas and it downshifted and recovered in the run to a 14.30 at 100.86 mph. I couldn't believe the triple digits on my time slip. This is with a x-cop car with 112k miles on it with the original trans(no rebuilds). Best run with the car that night was 14.09 at 100.58mph. I am sure with good tires and traction I could have been in the 13's. Hopefully this system is repeatable since I sold that car and looking for another one now. For reference my two friends were out there w/ their police camaro's and the one in his stock 92' L98 ran a best of 14.22 @95.5 and the other in his 94' LT1 with drag radials ran 13.96 at 98.9 mph.

?? - RFUENTESP@aol.com - '88 IROC-Z

i own a 1988 IROC Z28 5.7 TPI WITH HYPERTECHS STREETMASTER CHIP WITH THE

EXCEPTION OF THE COLLING FANS KICKING IN MUCH EARLIER THERE IS HARDLY ANY

DIFF FROM THE STOCK CHIP. ALSO EVERYONE KNOWS RUNNING THE THERMOMASTER ON

ANY V8 3RD GEN CANARO IS NOT A GOOD IDEA. I HAVE OWNED 5 3RD GENERATION Z28S

ANYONE KNOW THEY ALWAYS RUN HOT IN THE SUMMER DUE TO LACK OF AIR COMING IN

FROM THE FRONT OF THE CAR. I HAVE MY ELECT FANS ON CONSTANT RUN PLUS

INSTALLED A STEWART HP QWATERPUMP WITH A 4 CORE RADIATOR AND A 160 DEGREE

THERMOSTAT. KNOW IT CAN BE 120 DEGREES OUT WITH THW AIR ON AND THE TEMP NEVER

GETS OVER 220 DEGREES IN TRAFFIC. I ALSO INCREASED THE FAN SIZE WITH

DIFFERENT FANS FROM FLEX O LITE. OF AL THE CHIPS TESTED PER SUPER STOCK MAG

JUNE1991 HYPERTECH STAGE 1 CAME IN DEAD LAST. EVEN GM HP CHIP BEAT IT

OUT!!!!THE OTHER CHIPS TESTED WERE(GOING FROM THE BEST TO LAST.)

BEST-PERFORMANCE RESOURCE, GULDSTRAND ENGINEERING, GM PERF CHIP, ADS, TPI

SPEC STAGE 2.,LAST HYPERTECH STAGE 1. I HAVE EXTRA COPIES OF THE ARTICLE IF

ANYONE WANTS ONE. EMAIL RFUENTESP AT AOL. I HAVE OWNED 5 FBODIES INCLUDING

THE 1ST 1982 Z28 IN CHICAGO BACK IN 82. THAT I GOT RID OF FAST BECAUSE OF THE

CEASE FIRE INJECTION.. I HAVE TRIED A LOT OF THINGS ON THESE CARS AND KNOW

WHAT WORKS AND DONT>

Daniel Burk - transamws6@home.com - '84 Camaro

The third-gen can corner at nearly a g on street tires, and over 1.15 g on road

race compound DOT legal tires. I've measured it on my own '84, and I wasn't even

done with the suspension!

Here's cornering tips:

1) Rebuild the whole front end with PST parts. $314 for everything including

centerlink and idler arm.

2) Install a good set of shocks/struts/ Choose KYB if you are on a budget, or go

KONI.

3) Subframe connectors. I used Kenny Brown.

4) Performance alignment. Dial camber as negative as you can get. it will end up

around -0.5 degrees. Castor: +4.5 degrees. Toe-in: Straight-up.

5) Springs & swaybars. Stock 1LE pieces are nice. So are the regular WS6 pieces.

6) Steering box brace. They are cheap and help locat the box for more positive

feel.

7) Rear panhard rod.

8) strut tower Brace.

9) Rear lower control arms.

10) Road-race compound tires. These will be the biggest handling increase of

all.

Note: Even without items 6 through 9, my '84 was recorded as pulling a sustained

1.1 g in the corners, with peaks at almost 1.27 g. When mounted on old Goodyear

P225-55-16's that I bought at a garage sale for $2.50 per tire, I registered 0.9

g before the handling went away.

Daniel Burk

Kevin Minor - klvilla@juno.com -- Michigan - '92 Camaro Z-28

Hey Brian,

This is the first time I have visited your site, looks pretty good. I

currently have a 92 1LE Z-28 with a 5.7. It is mostly a garage queen but

I do take it out to the track once in a while. I purchased the car new

in 92' and ran it at the track with a best time of 14.5 stock. I

started doing free mods. to help the performance. The first thing was I

pulled the air filters and cut the bottom out of the air cleaner housing

out. Now I had two holes about 5" by 5" that I could look down and see

the street through. My car does not have fog lights so I fabricated a

ram air set up that scooped the air out of the holes where the fog lights

would be. Cooling is not a problem because air from the radiator comes

from underneath the spoiler. I also pulled the valve body down and

stretched the pressure regulator spring to boost my line pressure. I

removed the #8 check ball and drilled the orifice next to it ( I don't

remember the size) and I also removed the 1 - 2 accumulator spring. My

next time at the track I went 14.23 on stock tires. The increased

airflow and trans. mods. made a big difference, I have a Tech 1 scanner

and could snapshot the engine data and the shift added about 5mph, I

could watch the beginning of the shift about 30 mph, the mph would go up

about 15 mph (tires spinning during shift) then it would go back down to

about 35 mph in about 2-3 frames of the snapshot (about 1 second). I

played with the timing but it didn't do much, only gave me a rough idle.

Then bad stuff started to happen. I ordered a cat-back exhaust, headers,

intake runners and a prom from SLP. I installed these and noticed a

decrease in torque off the line and while driving. My next run at the

track I ran a 15.3. Lost about a second in the 1/4 mile. I took the

intake runners off and put the factory runners back on and got down to a

14.7 so I think the rest is in the exh. mods.. I also swapped back to my

original PROM with no change. I had my Tech 1 on and could not find any

engine parameters that were off base, my fuel pres. was fine, 47 psi, and

there were no codes set. I think the SLP bolt ons need some engine mods.

i.e. cam, to work properly. I really don't want to crack this engine so

I am not installing a bigger cam. I did look into longer ratio rockers

but the ones I ordered required I pull the heads and install pushrod

guide plates. I need some self aligning rockers.

This summer I have installed a Paxton supercharger, I am tuning it

now. The car pulls strong up until about 4000 rpms then leans out. I

put an adjustable regulator on and it hasn't helped fully so I am going

to go to bigger injectors. Hopefully I can get it to the track this

summer.

Sorry for babbling about my car for so long, hopefully my trial and

errors can help somebody else.

Brian - BRIANS86IROC@aol.com - '86 IROC-Z Camaro

Hi, my name is also Brian. I have an 86' IROC-Z, it has had a few engines and

transmissions in the past 5 years that I have owned it. It was all done for

the purpose of research & the never-ending quest for more power. I would like

to submit a few suggestions if I may.

TPI Car mods:

1) remove all of the restrictions of the factory set up; i.e. - air box, mass

air, exhaust system. Replace or modify these pieces to achieve more air flow.

2) replace all worn suspension pieces. You will never go be fast if you can't

put the power to the pavement.

3) TPI cars generally peak at 4200 - 4500 RPM, adjust your shift points

accordingly.

4) Give the car a good tune up with high quality parts; plugs, wires, cap &

rotor, fuel filter, fuel pump, pcv valve.

5) cheap mods: LT1 style IAT sensor relocated to the air box - reads cooler

air, advances ignition timing. Approx. $34. Port the plenum - more air flow.

$gaskets. Adj. fuel pressure regulator - more fuel to compensate for

increased air flow. $70-80

Notes: Most people seem to think that 3.73's or 4.10's are the hot set up for

TPI cars, with their limited RPM range - this is not the case. Generally

3.23's are the max for any TPI car running stock height tires; cars w/ 28

inch or taller tires will require more gear. TPI Specialties has a great deal

of knowledge concerning these cars, they were always right on with their

suggestions. When I second guessed them, I went slower - hence my comment

about the gears.

Traction Tip: by placing 4-5 washers between the spacer on the drivers side

end-link on the front sway bar, you can preload the suspension and improve

your 60 ft. times.

I own a 91' Z-28 Camaro with a stock L-98 5.7L engine. The 5.7L according

to Car and Driver magazine already runs a 14.40 stock. The 87'-92' 5.7L is

one of the most under estimated engines ever. With nothing done to my car I

ran a 14.30@97mph.

Then I started into the car:

K&N air filter

Take out the back seats and spair tires

A fresh tune-up, Boush Plat. Plugs, Excell wires, and an oil change

I ran a 14.10@ 98mph w/ a 2.1 60ft time which is OK

From there:

Hyproformance Dynomax Exausht

Not CATs

Less than 1 gallon of tubo blue racing fuel {run it with less than one

gallon of gas}

{Remeber: every 100 pounds a car loses, you gain a .10 of a second}

Synthentic Oil

Also good traction {Tires at 22pounds}

I ran a 13.69@ 98mph w/ 1.9 60ft times

Remeber the L-98 engine is an all torque motor, a Mustang will run a 14.20

at 104mph, but you got a faster time through the quarter mile, That's what

counts.