they made around 200 350's with 5 speeds, it had to be ordered though.

 

Really was it the same 5spd as the 305...because I thought those weren't rated to handle the mad TPI power...this is actually the first I have ever heard of these anyone got pics of one or something...

 

Everywhere I have read(mainly thirdgen.org) the consensus seems to be that there were no 350tpi's with the manual 5 speed from the factory. However, everyone knows a cousin's boyfriends brother in-law who has one. I guess we'll never know. But that doesn't mean the guy swaped it out. But it could possibly just be the 305, they look identical and they only way you would be able to tell is by looking at the casting number on the block....or by how bad you beat him

 

The original post never said the car was an L98 It prolly is a 230fwhp LB9. That was my mistake. Sorry, Anyone can install a 5spd behind a L98 though. There are TKO's out there rated at 600 ft/lbs of tq.

I had a 91 formula with a 5spd 230 hp LB9 and a 91 GTA with an a4 L98. Off the line the LB9 seemed just as fast but the 350 ran better on the highway. I have a friend with a 96 ws6 and destroyed me in the 305 on the highway but the GTA was right with him until I redlined in 3rd. Luckily he didn't want to go any faster so he gave up then. If I'd kept it I'd have installed the corvette shift solenoid. Fun cars though. Heck of a lot more of a sleeper than the 96' SS.

 

Back when they were new, I dont recall any bone stock third gens dipping into the 13's at all. LT1 cars have gone 13.50s stock. Didnt happen often, but it did happen.

 

i had a 91 l98 t/a and the best it ever ran was a 14.11 with a 1.85 60' with the same mods on my lt1 it went 13.2 only difference being the 91 was an auto the lt1 is a m6. also when i had all the mods on my 91 i ran my g/f (droptop 95 z28 m6) and she would hand it to me every time and her car was bone stock at the time

 

Alot of guys are taking the 305 T5 and putting it behind the 350.

It works, its not meant for the power just like how our rears aren't ment for our power but it works. It makes a really fun car too as all of the L98 stuff seems to make killer torque.

A big difference in a L98 and a LT1 is its not unusual to see a L98 to do 300rwhp and 380rwtq. They have plenty of intake options now that make it compareable to a LT1 with a nice set of heads.

 

i have had plenty 3rd gens to run 13s at sea level they only require a few mods to do so!!!!!!!!!!!!!!!!!!!!!........
my fastest stock motor t-5(conv)91z28 3.45 rear,hooker 1-5/8 shorties,no cats,amer. thunder,pulley's,cut air boxes with ram air fabbed,crane afpr,autolite 26's,ws6 alum.driveshaft,58mm tb,ported upper plenum,perf.resource chip,no front sway-bar, on m&h racemasters ran a 13.1@106 1.7 60' at sea level so it is entirly possible.....
i worked on 2 cars that did not exist to the general public at my old shop they both worked for GM 91 5.7tpi 5-speed droptop,92 t-top5.7 5-speed they told me "if you know how to read codes when ordering you can get it but most salesmen will tell you it was unavailable plus it helps to work for GM"

 

Stumpy has gone 11.96 @ 112 in a stock motor LT1.

 

tpi will compete with the LT1 until the TPI gets to about 3000-3500 rpm, then the tpi becomes a major restriction. look at a dyno sheet on the TPI cars and you will see the powerband drops off alot once it closes in on 4800 rpm, 4800 rpm is known as the tpi wall. the intake cant flow enough to make good power above that. if they switch intakes to like a stealth ram or mini ram on a tpi car they are close to an LT1. i had a 89 iroc z with a 350 and a t56 and the best i got in it was 14.2 before i switched to the stealth ram. after that it would run all the way past 6000rpm with no problem. revving to 6000 on a tpi intake is just pointless, you can do it, but there is no power up there.

 

You do not want to run a 4.11 rear on a TPI system, you will run out of gear up high real quick, 3.73 is probably the highest you want to go with a 5speed in a TPI.

 

Yeah, thats what everyone I know is saying too. "He can't run it too fast, he'll rev that engine too high and blow it." I think im gonna save some $ and mod my engine a bit before I even think about going against him. (nothing too serious.. just CAI, Exhaust, maybe bigger TB)

 

unless your car is a factory freak slow car, then you would beat the TPI car with no problem, just run up to 5800rpm on every up shift so you are higher in the powerband where you make good power after you shift, once you hit 3500, your LT1 will outrun a TPI car since your still accelerating to 5800rpm while he is shifting at 4800rpm. that is how to take care of a TPI car in a street race. late model 350 3.23 and 3.27, and 305 3.42 and 3.45 5 speeds, those are the top of the line L98s, ratios for rear determined by either MAF of MAP.