I have a 89 fomula firebird. It has 3.43 rear gears and 3' exaust ,shift kit, and a chip. every thing else is stock. what can I do to improve quarter mile performance. I don't want to bottle feed or super charge the motor. I would appreciate everyones suggestions.

 

Do the little things first if not already done.
Tune up with good plugs and wires
Underdrive pulleys
K&N air filter
Port plenum
Air foil
AFPR
sub frame connectors
strut tower brace
good shocks and struts
then you can move to cam, heads, new ignition, headers, high flow cat.
I think that should get you started. There is a lot of stuff listed in the tech articles on this web site as well check those out.

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Member of NCTGA
North Carolina Third Gen. Assoc.
'89 Iroc-Z
305 TPI few minor things
5 speed
Lowered 2" and yes it is a pain to drive

 

1. 2200-2500 rpm stall converter
2. Drag radials

Worth .3-.6 seconds.

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87 Formula 350 13.94@96.67
98 Z28 1LE 13.15@107.59
1LE Owners Association

 

there are hundreds of things you can do. Where would you like to start?

taking care of the torque converter, tranny, and tires for traction is a very good start.
then I would optimize the exhaust as much as possible.

Then move on to any number of things pertaining to the TPI.

what are you wanting to work on?

 

I would like to start with bolt-ons ,headers and tpi work. what would you recommend. Also what dot tires hook up good off the line under $120 a tire. I was thinking about 245/45/16 for the rear and 245/50/16 for the rear. do you know anyone who makes these. Thanks

 

I use a Mcreary Road Star in 15" that works great. You will have to check for a 16" version.
E.T. Streets come in 16"

 

A friend of mine has run the Nittos but they didn't work out so good for traction.
I don't think he could pull better than a 1.70 60' time with the Nittos.

 

On a budget,
you could get some TES headers and port the flanges yourself.
An RPM switch to control your torque converter lockup is a cheap mod good for a nice gain.

Underdrive crankpullies work well.

Higher ratio rockers may work well for you too.

Those are some lower buck boltons. They should all add solid power.

 

Thanks for all your suggestions