Ok, lets say that I have a 5.0 TPI from an F-Body that was complete, ready to throw in and start driving. Then, I also have a 350 with no intake that's an 87+ style block with heads and everything. Can I take the TPI stuff off of the 305 and stick it on the 350 and have a 350 TPI?

 

Most definately. I don't see why it wouldn't work, to tell you the truth. It should all bolt up the same, only difference being the internals. Please someone correct me if I'm wrong . . .

 

What year is the 305? If its 87+ as he said, yes it will work great.You might want to change injectors as the TPI 350s had 21lbs and 305 had 19lbs depending on what your doin w/ it also.

 

Dont you mean 24lbs? My 87 5.7 had stock 24lb injectors

 

Are you sure? I could be wrong but I didnt think GM used 24lbs in F Bodys until the LT1.?

 

Actuallly I believe they are 22 pph they ran rich with 24 pph

 

Nope the ones that came in my car were 24s & since nothing was really changed in the last 17yrs I assume they were stock.

My car now has 30s in it which will change once the new chip is done & will go back to 24s.

 

No it didn't. 305s came with 19lb injectors, 350s came with 22lb injectors. If yours had 24lb'ers then they weren't stock.

 

Why would everything else in my car be stock & not the injectors? I mean when I got the car 2yrs ago it even had the factory org Fuel filter in it which was changed a year after I got the car. I mean EVERYThing but the steering wheel was factory org.

Plus when I called to have my chip done by two diff. shops they said they were 24lbs & all the race guys around here who work on TPI engines say they are 24 lbs?

 

I have seen the EPROM codes and they are set at 22. When I put 24 in it one time without the EPROM changes, the car ran rich.

 

Possibly because they had a probmem and had to change it to 24. You do realize that because of the GM tag on it, you get to pay a premium. Just like a lot of Bosch components are the same as Mercedes Benz and even have the same part numbers. However, because it comes in the silver box with the 3 point star, you get to pay more. If I was the previous owner, I might have elected to change the injectors because the EPROM will adjust for it. Only reason I knew it ran richer was because my car is SD and it doesn't adjust as well and I could see it on the scan tool.

 

Taken from Chevy High Performance online tech article:
"The TPI manifold was originally designed for 305ci engines with 19 lb/hr fuel injectors operating at 36 psi, and employs a long and narrow runner to enhance bottom and midrange torque. The 350ci TPI-equipped engines use the same intake as the 305ci with larger 22 lb/hr injectors at 43.5 psi . . ."

 

Then would someone please tell all the Perfessionals in this area & across the country they are WRONG & total idoits.

 

I don't think I would go as far as calling all the "Perfessionals" around the country "total idiots", but perhaps miscommunication got the best of some of us . . .

 

Gladly, they never ever came with 24# injectors. Ever. 1993+ cars had 24#'ers with the advent of the LT1. (Or 1992 for the Corvette. )