racewrench

iTrader: (1)

all I have delt with up untill now has been 2nd gen f body cars. now I am getting into a 87 Iroc project for a friend. he wants to put a 300 hp 350 gm crate motor in. it has center bolt heads, but it uses the old style intake bolt pattern. he wants to retain the tpi. will the tpi intake work with the old intake pattern heads? what do we have to do to make it run right? injectors, throttle body, knock sensor, chip, fuel pump, regulator? any and all help will be greatly appreciated.

five7kid

iTrader: (14)

Depends upon how "old style" you're talking about. The description of the crate motor sounds like one people have discussed here before, and it has the '87-up bolt angles. But, even if it is '86-earlier, minor modification to the intake base center two bolt holes on each side is all that's required to make it work.

FWIW, center bolt covers and '87-later intake bolt pattern typically go together (except on my World heads ).

305 throttle body is the same as the factory 350, but upgrade to 52mm coupled with plenum porting wouldn't hurt anything.

300 HP would probably be supported by the 19 lb 305 injectors with an adjustable fuel pressure regulator.

Get a 350 knock sensor & module. 350 chip a good idea as well.

Fuel pump is the same, already discussed the reg.

racewrench

iTrader: (1)

It is the pre-87 style, so I will have to change the angle of the center two bolt holes on the lower intake. I'm thinking we will be going with 21-24lb injectors, and 58mm throttle body, what fuel pressure should we need to run? where can we get a 350 knock sensor/chip? and what "module" is five7kid talking about?

five7kid

iTrader: (14)

21 lb will handle 300 HP with ease (remember, they're talking about gross flywheel HP, not the net that is quoted from the factory). 58mm will be overkill. Fuel pressure is a matter of tuning.

The knock module is up on the firewall, driver's side. You can get the sensor & module, and chip, for '87-'89 L98 from a dealer or used auto parts specialist.

racewrench

iTrader: (1)

heads on crate motor are casting number 14096217. research on them shows that they have 72 deg. intake bolts, and they have 64cc chambers. will that work with the 87 tpi. ? or are those the ones that I will have to elongate the center holes? would it be better to use those heads or the 305 heads? does the 305 have a roller cam?

five7kid

iTrader: (14)

That's the '87-up pattern. No elongation required.

Only remaining question is if they're swirl ports. If the answer to that is "yes", the TPI 305 heads, with 1.94" intake valves installed and some basic porting, would be better.

'87 was a roller lifter type cam, if it is the original 3rd gen engine.

Frank 84 Bird

I have the same engine that I'm gonna be swapping from my wrecked 84 Bird to my 87 T/A with 305 tpi. The cylinder heads are non swirl and are based after the cast iron l98 heads. My heads do have the pre 87 intake bolt pattern. I'm just gonna port out the base and plenum and get some after market runners for it. The stock throttle body should be enough for this engine.

This is my engine

http://www.sallee-chevrolet.com/Chev...ckV8s/300.html

five7kid

iTrader: (14)

From that link:
"This engine has been discontinued.
This page will remain here for information only.
Webmaster 9-30-99."

racewrench

iTrader: (1)

the motor is a few years old, it spent a few years in a suburban pulling around a boat. It has aprox. 40,000 (very hard) miles on it. we have dissasembled it and there is almost no signs of wear, nice cross hatch pattern on the cylinder walls, not much wear on the bearings, ect. we are going to have the block cleaned and honed, and have the rotating assembly balanced. we are still looking at which cam to go with, any suggestions? it does have the optional 3.45 rear gear.

Frank 84 Bird

I bought my engine way back in 1994. Mine only has about 20k miles on it. As far as the cam I'm still trying to figure that out my self. The block is setup for a roller cam(more $$ though). If you go roller your going to have to do some work to the heads for larger springs.

racewrench

iTrader: (1)

What "Extra" under the hood stuff can be left out and still retain the TPI when we put the 350 in........ smog pump? I'm not sure if the budget will allow for headers right now, so I was wondering how hard is it to put headers in with the motor in, assuming there is no smog control stuff? I live In Kansas, as of yet we have no smog laws.