i have a 1989 formula 350 .
all stock with 3/23 gears.
anyone know what a decent 1/4 mile et should be.

 

Totally stock, 14.8 or there abouts...

 

When my car was totally stock, it ran a 15.18. According to the back of the Hypertech box for the Thermomaster chip, it says a stock 1989 350 TPI w/ automatic does 15.50.

 

Never ran it totally stock, but with exhaust I did a 14.38@95 2.0 60'.
Anywhere between 14.5 and 15.5 is probably the norm depending on many things.

 

how much of an improvement do you guys think the SLP package will make on this same car. i have a 89 Formula 350 w/3.27 gears
will 0-60 be around 6 sec?

 

Which package? what's in it?

 

the headers, cai, chip and exhaust. not sure about the runners. i've heard good and bad about them.

 

my 88 formula 350 i had, stock except flowmaster exhaust, k&n and air fil ran a best of 14.426 with a 1.9xx 60 foot, i dont remember the mph but i would think like 95.

my 91 formula 350 is a bit faster.

 

Around 240 HP stock, if memory serves. I plan to improve induction and add headers. Do away with exhaust manifolds!

Bill

 

From what I've come across, shorter runners on the plenum [am I referring to the right thing?, now that I think about it hehe] will only add performance.
The big ones look nice, and now I see a kit available for a chromed version...that would get noticed!
Bill