injectors for a tpi?

ok, i'm going to go get that camaro tomorrow, the guy says it has a 350 that he swapped in place of a 305, with the same ecm and injectors and all that stuff. I was wondering what injectors do the 305s use, and the 350s use? I need to use it against him so i can lower the price on the car. Hes asking 2995 for a z-28 with a "350", thats torn up. So if you guys could please help me out, with most things you would need to change to go from a 305 to a 350 just on the manifold area. Greatly appreciated, thanks

[99SSRhodes]

can't u just check the block num?? and make it so there is no dispute on it being a "350"

[thursday12889]

see uhh right there, i don't know what your talking about thats why i need help, all the help i can get so i can lower this guys price so i can do an even trade, my s-10 for that camaro

[GETGONE]

Actually there was something in the latest GMHTP and it said you can use the stock TPI, injectors and ECM from a 305 on a stock spec 350 and it'll work fine. Only if you have a built 350 do you need to upgrade that stuff.

[99SSRhodes]

I ment block not "black"

There is a number molded on the block depending on what it is
look for the number and here is all teh numbers for the 350's and 305's

I did't kno what yr the car ur lookin at was so i just put all of it up

Years Casting CID

1980-85 140029 350
1978-86 366245 350
1982-86 366286 350
1982 366299 350
1968-76 3855961 350
1968-76 6259425 350
1980-85 14010207 350
1980-85 14010209 350
1982 14011064 350
1978-85 14016379 350
1986-94 14079287 350
1987 14088526 350
1986-94 14088548 350
1986-94 14093638 350
1986-94 14101148 350
1969-85 14316379 350

1986-92 14088551 305
1988-94 14093627 305
1980-84 14016381 305
1978-88 14016383 305
1978-86 14049047 305
1978-86 14010231 305
1980-84 14010201 305
1980-84 14010202 305
1980-84 14010203 305
1976-85 355909 305
1976-79 361979 305
1976-79 460776 305
1976-79 460777 305
1978-79 460778 305
1976-85 581671 305
1987-88 14102058 305
1988-94 14094766 305

[thursday12889]

thank you very much, that will be of great help, and its an 86 camaro

[MattODoom]

The difference between the 305 and 350 TPI is two things.

305 has 19lb Injectors,
350 has 22lb Injectors.

305 and 350 have different MEMCAL packs (the "chip" in the ecm). You'd need new Injectors and the proper MEMCAL to get it running right.

Since its an 86 and has a swapped in 350 is likely a perimeter bolt valve cover head, which means its not a factory roller cam. If its a centerbolt head then it might be a factory roller motor... but they started those in FBodys in 87. Trucks didnt get them till 94-95.

[WMCCjames]

Matt pretty much summed it up. Just be sure and check the casting numbers so you aren't getting taken for a scam.

Also....you can use those 19lbs injectors just fine on that 350....just need to get an adjustable fuel pressure regulator. It's not the "right" way to do it, but it works. Back in the day before I starting burning chips I had 19lbs injectors running a very mild 406.....I just had the pressure jacked up to 60psi

[thursday12889]

alright, well I still wrote all the block numbers, and what injectors are for what, and the memcal pack thing, i need as much stuff to use against this guy as possible so i can get it for as cheap as possilbe. He thinks i'm just a stupid kid that doesn't know anything at all but oh yeah i'll show him, start throwing all these questions out that he won't be able to answer. HAHA, in his face

[thursday12889]

oh and also, if i get it, would you recommend changing it to speed density instead of having a MAF sensor, and do the tpi airfoils really show an improvment?

[WMCCjames]

I'm not commenting on the MAF vs. speed density issue. I personally have a MAF set-up in my car, but am switching over to SD when I get the time. I have tuned both set-ups before on other peoples cars. I prefer SD from a tuning aspect.

Airfoils are a gimmick. The gains you see from them are negligiable at best.

[thursday12889]

oh alright, now since you seem to know alot about the tpi engine, i was also looking at the slp runners, slp cold air kit vs. a k&n filter right off the throttle body, and switching it over to SD. So you think go the SD route, but what other things could i do just for some bolt on performance parts, without getting real high dollar, like your engine appears to be from what i saw at the dust off?

[MattODoom]

oh and also, if i get it, would you recommend changing it to speed density instead of having a MAF sensor, and do the tpi airfoils really show an improvment?

MAF is more forgiving with mods. You wont need a custom chip with mods and mild cams, SD will need a custom chip for anything much more then exhaust.

I have a TPI airfoil... couldnt tell you if it helped, did it same time as cam and heads.

[thursday12889]

oh, well know anything about the runners and the cold air intake setup? And yeah I'll stick with the MAF, just get a high performance JET one or whatever there called. If you guys have any bolt on ideas i can do that will give me more power after i get the engine rebuilt please list them. And I will post up pics of that 86 camaro tomorrow.

[99SSRhodes]

sounds like a sweet car I'd say number one thing with out a doubt is check the block nums cuz then there is no doubt about what it is and he can't argue

but i was j/w how do u kno its not a 350??