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MODIFICATIONS - What others have done (Performance Lists)

Hi-Performance Lists

This page shows what other F-Body enthusiasts suggest to increase the performance of your Third Generation F-Body. Use these suggestions at your own risk, none of the people below or myself are responsible if your car starts having problems! Send E-Mail to Brian (E-Mail address on left side) to submit more suggestions.

 


In a recent issue of High-Tech Performance Magazine, they claimed they could get anywhere from 0.3-1.5 seconds off the 1/4 of a 305/350 Camaro/Firebird (3rd gen.) by doing the following:

Stage 1

  • Remove filters (Race use only)
  • Set base timing to 11-13 BTDC
  • Remove front sway bar
  • Pump front tires to 40 psi (Race use only)
  • K&N air filters for street, $40
  • Auto Specialties crank pulley, $80
  • 160 thermostat, $15
  • Hypertech fan switch, $30
  • Cool intake with ice**, $5
  • Total: $170

Stage 2

  • Slicks and wheels, $400
  • Driveshaft loop, $40
  • Total: $610

Stage 3

  • Flowmaster High-flow exhaust, $350
  • Total: $960

Stage 4

  • Edelbrock headers, $350
  • Throttle body air foil, $60
  • Crane 1.6 self-aligning roller rocker arms, $300
  • Fuel pressure adjustable regulator and gauge, $100
  • Install 3.73-4.10 gears, $200
  • Total: $1970

** The colder the intake manifold, the colder the air entering your engine. This means free horsepower. We've dropped as much as .3 second on 5.0 and LT1 engines using this practice.

CAUTION: After icing intake for a half-hour or more, remove the ice pack and clear any remaining water from the underhood area. If you don't clean the water, there is a good chance that it will end up on the track and under your rear tires, negating all the work you've done.

For more information, go to http://www.cskpub.com/HTtoc.html.

 


Adam S. Bruce - adam@nettally.com - adam@gulf.net - http://www.gulf.net/~adam - Florida

With a few cheap mods you'll get 14s no problem:

  • K&N Filter - $30 - ? hp
  • Gut Mass air flow sensor (take screens off) - free! - 10 hp
  • Throttle body spoiler - $35 - 10 hp
  • 160 thermostat - $10 - ? hp
  • Throttle body bypass - $0.60 - ? hp
  • Advance timing - free! - ? hp
  • Hypertech chip (Noticeable Difference) - $99 - ? hp
  • Exhaust cut out - $45 - 20 hp

 


Jim Black - 1995 Z28 M6

  • Throttle body air-foil 10 hp
  • Adjustable Fuel Pressure Regulator 10 hp
  • Power Pulley 10 hp
  • Hypertech chip

 


Terry Hartman - txhartma@spd.dsccc.com - Plano, TX - '87 5.7L GTA Trans Am

For even more performance, contact The Turbo Shop in California. They have TBI spacers that'll allow better airflow. They even have an adjustable fuel pressure regulator that'll allow you to tune-in your fuel curve better.

For even better induction performance - look at the Edelbrock aluminum TBI intake manifold.

I'd also recommend getting a free-flow mandrel bent cat-back exhaust - it doesn't have to be loud to be effective either ;) ;)

 


Paul Niezabytowski - pjniez@rochester.rr.com - Rochester, NY - '89 IROC-Z, 305, A4, Borla

I have never taken my car to the track to see what it will do. I can only comment on SOP differences. I don't drive my IROC daily. I drive my '93 Integra if there is rain in the forcast which is most of the time. So every time I drive my IROC it always seems quicker by the SOP and it is
hard for me to determine SOP pants differences. BTW, I purchased this car from my brother last June with 106K and it has over 110K on it right now. Next year I will be looking to rebuild the tranny and the year after replace the motor with at least a 350.

Given that, here is what I have done and what I THINK the SOP performance was:

  • K&N air filter - No SOP difference.
  • Replaced MAF w/ new MAF from TPIS with screens and heat sinks removed (I ruined mine when I removed my screens) - slight SOP increase (could be attributed to the fact that I had to drive my Integra for about a week straight until I figured out what to do about the broken MAF).
  • Hypertech Stage II Power Chip - slight SOP increase at WOT
  • Hypertech 160 deg. thermo. - No SOP difference but car runs CONSIDERABLY cooler!
  • Hypertech 2nd fan switch - Not installed yet - do not expect any SOP increase; just run a little cooler when sitting still idling or in stop and go traffic.
  • '95 Borla adjustable cat back sys. - slight SOP increase at higher RPMs; VERY cool sound! VERY cool looks! I feel there is too much restriction from the cat up to the motor - need to make some improvements here but I will wait until I get a new motor!

That's about it for now. Next year I plan on doing the tranny for sure and possibly put in a F*rd 9" rear with 3.73 or 4.11. Hopefully, the year after change the motor for a 350, 383, or 400.

 


David Tuschhoff - DavidT.RS.SLU@worldnet.att.net - '91 RS 5.0L M5 3.08's & MODS!

I have done 115mph easy. i figure i could do about 130+ mph. you probably could too. definately get a chip and change the thermostat. as for the spacers, there will not be enough hood clearence but you can get the injector spacer. this is what i have. dunno if it did much but every little thing felps. a mod that you can do yourself is remove the lip that sticks up about an inch inside the base of the air cleaner. there is four spots where it is welded in but just pry it apart. with a K&N filter your motor will get a lot more air. hope this felps.


Bill - onthree@algorithms.com - '87 Formula 305 4bbl TH700R4

Ok, i have John here with me and he is going to tell you what he has on his car.

---John typing----
this is what i have put on my car in the past 6 months

160 thermo
Hypertech Thermomaster
Manual fan switch
Flowmaster Cat Back Sys
At first gutted cat (then put in a high flow cat)
Edelbrock Headers
Corvette Transpack (same as Bill's)
K&N filter
underdrive pullies

i am going to go with a cam really soon probibly one of the compucams

---Bill Typing----

anyway i hope this helps you in your quest to go fast.. you can see that his bolt ons are the basics exhaust intake and cooling.. i am going to be helping him put in the cam.. cause i will be getting one soon also, and i can use the experience... IMO your best bet would be to look at your cat, see if the inside is melted or not. make sure you look in the front of it., cause that's where it would melt.... if so replace it with a high flow one. and go with a cat back sys... these are the easiest things to do..... and you can go with the K&N filtercharger.. that will help you breath.. these are the two/three things that i would do first with your car.


CamarowGuy - CamarowGuy@aol.com - '92 Camaro RS TBI & Mods

I have a '92 camaro RS TBI. Mods are as follows:

1) Jet performane chip; Didn't notice a difference
2) K&N open element air cleaner; noticed a BIG difference
3) Hedman emissions legal tubular headers; No difference
4) Hi flow 3" cat. with 2 3/4" exhaust and single in/out 3" flowmaster muffler; made a diff but not much
18" O.Z. monte carlo wheels; no difference, but look cool.
Future Mods.
Putting true dual exaust
670 cfm holley projection thottle body and edelbrock intake.
360 hp 350 from summit
auburn positive traction unit

Any questions you can e-mail me at CamarowGuy@AOL.Com


Karel Lacaci - lacaci@gate.net - '86 Berlinetta

All I see are people with State-of-the-art Z-28's and IROC's, is there any normal camaro driver out there? Here's what I did to my 86 Berlinetta, and can take any IROC any time...

- Replace stock air filter with GM performance chrome - no HP but good looks :)

- Rebuild Engine and replace camshaft and timing chain - From 0-5500 RPM, no fancy stuff..

- Replace valve springs and tune heads.

- Replace stock carburetor and manifold with Edelbrock manif, and a Holley 600 cfm carburetor... nice HP, good fuel consumption.

- Tune transmission.

- After all those changes, no car will pass the emissions test so you may as well take off the catalytic converter and change the exhaust system to a direct pipe with dual exhaust. Note: Headers are a piece of crap, these only burn gaskets and do not increase any RPM unless your engine is only for racing.

If you are a street racing fan, this will be a costly "tune-up" but your car will look "stock" and will kick any Mustang Cobra's ass on the track.

 


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

http://www.isthq.com/~dan/fcar.html


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.


?? - Sendal16@aol.com - '91 Camaro Z-28

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.