i recently bought a 1990 firebird w/ no mods or anything. its a stock lo3 with 130,000 miles on it. i have been looking all over for quarter mile times from the factory but i cant find any. i took it to the track bout a week ago and my fastest time was 17.01 at 80 mph. i was expecting a little more out of my 305. does any one know if thats a normal time or do i need to do a tune up or two?

 

i forgot to say its TBI, and from what i read i should have 170hp and 255 ft/lb torque.

 

There are certain things that may give you slower times like altitude for 1.

Where I'm from, compared to L.A. for instance, the altitude diference adds a whole 1/2 second to my time! So if I made a pass and ran 14.8, in L.A. I wouild have ran 14.3, big difference.

I am about 2,200 above sea level, I do not know where you are located but this may be a factor that hurts your time.

Also, is your car tuned up? Lo3's are't really all that great of engines, then again when I had my 84 LG4 Camaro SC, I would run in late 16's with it, so I don't know whats wrong with your situation

is your car auto or manual??

hope this info helps.

 

A low 16 should be possible.
Have you done a tune up on it? How does the tranny shift?
What were your 60' times? Like said altitude will affect the times too.

 

0-60 times were 2.545 and my car is automatic, and i dont live in high altitude, at least i dont think wisconsin is very high.

 

hmmm, "looking for my LG4's time slips, be back with ya "

 

Looks like you have some improvement to do in the 60' times. Did you spin off the line?

 

yeah, it felt like i was spinning them, but not a really long time. some friends of mine who were watching said they could see a little puff of smoke. i was thinking about things i could do to the car and the first place i am going to start is the rear end and suspension. i wanna go from the 2.73 gears (which i think is killing me) to 3.73. plus i am gonna go with posi. i am thinking it will set me back a good 900 but its worth it.

 

I think 3:42s would help you more, unless you plan on doing a cam swap and adding a free flow exhaust. You really need to match gears to your cam's powerband.

I didn't, went from 2:73s to 3:73 posi, didn't run any faster.

 

i was under the understanding that the higher the gears the better, unless your at your redline at the end of the run. but maybe i should take your advice. i am pretty sure i wont be doing a cam cause i dont have the time and knowledge to do it myself and i also dont have the money for someone else to do it for me. but i will get an exaust done on it

 

No, WI is not high eleveation. At least where at I'm at (Hudson) it's about 1100 ft.

 

16.7 @ 86.8mph via G-tech 1990 Camaro RS w/TBI automatic no mods all stock with 3/4 tank full......Chicago IL