Apart from the injector size (305 is 19lb and 250 is 22lb..I think), is there a difference between the TPI setups in a 305 and 350.

I have a 305 TPI and someone is selling a stock 350 TPI setup. I want to see if it is worth buying and swapping onto my stock 305.

Thanks....Bill

 

theres a definite hp gain and torque gain. Not to mention more options you have with a 350. I bet the TPI is larger too

 

Everything's the same, except the knock sensor, the injectors and the ECM calibration.

 

Aperion,

Is there anything to be gained by buying the 350 base, plenum, throttle body and injectors and putting them on my 305?

 

nope, nothing at all.....you wont need bigger injectors unless you have a cam. 19 lbs are fine for most bolt on 305's

350 TPI is same as the 305 TPI. runners/base/plenum are identical.

only differences from the LB9 305 and the L98 350 is the injectors, ecm, and heads... 305 heads have smaller combustion chambers and thus raise compression on a 350 car.

 

He was asking about the actual TPI intake itself, not about the engine size configuration. And the actual TPI intake, runners, throttle body, and plenum are the exact same on a 305 engine or a 350 engine.

 

Thanks all. Guess I leave the 305 as is and keep my $$ for something else.

Thanks Again

 

Buy the intake, port the intake and put it on then re-sell your old one. That will make a difference in power, and reduce your down time. Also keep in mind that they have made a few versions of these intakes, so you want one without the cold start injector, and one that's not for a Corvette as the base bolts are different.

 

Now here my question....i have the 305tpi with the 700r4 tranny if i put the 350tpi in it will it match??? and then one more i luv to drag race.....do i use carberated or fuel injected?

 

Match? You mean, fit? Yep! As far as drag racing, most go carb but FI is more dependable and daily drivable. Don't think that it will be just your racer. There's many times I had to pull out the bird because of something that happened to the cobalt. You need your car as a backup sometimes. Also consider emissions. Switching setups is a big time no-no.

 

ok well i have a back up car basically id prolly drive it im just wanting something thats going to do better in the quarter mile.....u know carberated or fuel injection????...and should i put the 350 in it???

basically i have a Muncie 4 speed i can put in it and it will work on bother the 305 or 350. please help please and thank you

 

You can put a muncie trans in a thirdgen, but it's not a simple, bolt-in job. You'll need a custom crossmember (Spohn) to accomodate the torque arm setup in a thirdgen, and you'd also need the mechanical clutch linkage from an 82 f-body, a custom linkage setup, or the mega-expensive, aftermarket hydraulic throwout bearing assembly. In fact, if you're mainly building a quarter mile screamer, you'd be better off building an old, carbureted Camaro, Nova, or Chevelle, etc. I love my 4 speed, 69 Camaro for screaming through the gears in a straight line, but my thirdgen is a godsend when it comes to a fun, sporty car to drive daily.

 

so im better off building a 355 or 350 carberatored?? i always though fuel injection would be faster especially threw the quarter mile?

 

First thing first, please learn how to spell check...or how to spell. Reading posts that look like they are written by a 5th grader bugs me. This is not an attack on you, it just happens that your thread is the one I am responding to right now.

On to your question. Fuel injection is more efficient and can produce more power. But it is harder to tune properly if you don;t know what you are doing. A carb can be tuned at the track without pulling out a laptop (and depending on what computer set up is in the car, you may need to take re-flash gear with you too).

 

ok sorry about the spelling lol.....so then i should take out the 350tpi and switch it with a 350 carburated?

 

EFI is better for a street car, and carbs are better for a race car. You decide, but I prefer EFI. And I really dislike converting a TPI car to an antique carb. Buy a carb car if you want a carb.

 

the knock module is different too.....

 

I am with Kevin....I too would stick with EFI, but the cost is a lot higher to do it and get the same power.