well its 2 am and im bored, i dont think my car is track worthy really lol, but i would like to hear what you guys think it might run and save me the embarrassment,its a 305 tpi lb9 with a 700r4, with dynomax cat back, k&n filter, i put 350 injectors in it (19 lbs), it has 2.73 rear end limited slip posi, its been flashed for injectors, screens taken out of maf. the car has been lowered 2 inches. the top end has been taken from a 350 i believe also

 

first of all 350 injectors are 21lbs. When u mean top end from a 350, are u referring the tpi system or l98 heads? unless ur boosed, l98 heads will lower ur cr considerable which will make u slower, plus i think the intake valves are too big to clear the 305 bores. The tpi system are the same for 305 and 350's. To give u an estimate i had an 89 tpi trans am and i ran a 16.0 @84mph with a 2.64 60'with the mods in sig which included a rebuilt engine that was bored .030 over. As u could see i can't drive. I sold my car to steve 87tpi and with the proper tune up, he out runned an l98 on the streets. Steve guesses he could hit mid to low 14's in the car. We find out tomorrow when we go to the drag strip. so to answer ur question, it depends on the driver. Some lb9 could range between high 14's to low 16's. in my case low 16's to low 17's

 

Low 15's, high 14's

 

for the record, the 1.94/1.5 valve combo in the l98 heads work fine in a 305, however, the 64cc combustion chamber will lower the compression ratio, which will decrease engine output.

with that in mind, your sitting at about 8.7:1 compression if that is infact the case. i'd say mid/low 15's with a decent 60'.

if the 081 heads are still on the motor, then it'll be right at 9.5:1, and with traction, the car *should* run high/mid 14's.

 

ya sorry guys i musta had a brain fart cause it 2 am but when i said 350 top end i was talking about the tpi, my dad and i put it on, not sure if it would help any, stock heads are on it, o and the cat is gutted lol, but almost done buliding a vortec 350 so i think that will be track worthy. i thought 305 injectors were 17 lbs and the 350 were 19 ? o well

 

was the car originally an lb9, or an lo3?

 

I thought L98 injectors we're 22lbs? Doesn't really matter but hey...

 

lb9 is what shows in my rpo and hasnt been touched. what was really funny cause my dad is good friends with the original owner, when he bought it the car in new york or new jersey the car had formula 350 decals all over it, and they told him there was a 350 in it, i even have origal paper work, but as far as i know its an lb9.

 

it would be an L03 then if you swapped a TPI into it though, which means it not the original motor if you have LB9 paper work....

solid 15's if it was a L03 your not gonna pop a 14...

 

it was a tpi when i got it, we just swapped parts im not really sure i think runners were dinked, manifold was corroded etc.

 

you got a crap cam, bad gears/peg leg and a slush box so I would say low 15's, high 14's in good tune... Give it some timing and get her running nice.

 

its not a peg leg its POSI limited slip.

 

can i go ahead and suggest sfc, lca relocation brackets and sticky tires...otherwise, your just spinning your wheels...literally.

 

bolt on or weld on sfcs? and how makes some good ones. and why relocate lcas? educate me.

 

too bad your not closer to me, i'd make you a set of inexpensive custom sfc's myself...but, your not, so i'll suggest some spohn WELD IN sfc's. the bolt just stretch the holes over time and lots of power.

by relocating the lca's, you move the back of the lca's below the front. this makes the lca's act as a lever.

when torque is applied to the rearend, the pinion gear tries to climb the ring gear. when the back of the lca is above the front, it pushes the rearend up, which enhances wheelhop. when it's below, and the rearend tries to rotate over backwards, the lca pushes against the car, planting the rearend and lifting the front of the car. these seem to work the best when using a drag radial or full slick.

because of their wonderful street characteristics, and DOT approval, i suggest the M/T ET Street Radials...and a set of 3.42 gears. do all of this and your stock lb9 will thank you!

 

lol thanks but lb9 is gonna be sold not sure how much i can sell it for its got 73k miles on it. i gotta make room for the vortec engine i have, i just bought a lt4 hot cam and related, and crane gold 1.6 rockers.

 

i'm just saying, you can take full advantage of the current power. all of these things will be useful when you put more power to the car, as they will no longer be just a nice thing to have for tuning, etc., but a necessity.

 

LB9 cars like a 3.4x gear with some stick tires to get a killer 60'. Much like with any tpi car, if you plan to get any kind of et, your 60's have to be near the 2.00 mark. I would suggest headers and stall, and if thats more work than you would like, catback, suspension work and simple intake mods work well.