hey to all my 92 tbi is going to be a tpi
from a 87
(everything should bolt up correct?)


its going to be a 305 of course with a lt1 cam and full exhaust and soon a nice rear end (probably a 3.42)



wondering if tpi heads are keepers?

good flow?
should i go ahead and put some aftermarket rockers on em??
or just buy better heads?

knowing all this should i use stock injectors or go bigger and
im pretty sure i cant reuse my feulpump from my tbi correct me if im wrong
if i need a new one wat would be the best ones to get?

 

i guess that's up to you on the heads, if you can afford that is. second, if you do a head swap you should get your intake port- matched,or buy a bigger intake. You also need to re-pin your harness at the ecm to work with tpi. stock injectors are fine. Idk for sure,but pretty sure you have to swap out the fuel pump.Car will run better with a custom re-burn of the prom too.

 

im gettin the ecm also for a tpi but i wonder hpw the tbi heads would work on it. . . . could possibly go to vortechs

 

I wouldn't use those. At least use tpi heads.

 

You will definitely need a different fuel pump. TBI only puts out 14 psi- TPI requires close to 50. Also, the rubber lines need to be EFI lines for the pressure. You may already have this- just don't know what a TBI car came with. You can use a stock GM TPI pump, or aftermarket like Walbro 255.

 

yeah either tpi heads or vortechs
really leading towards vortechs


have to do research on that one for feul lines

 

Yeah,well,if you the vortec route for $600/pair then don't forget you need a special tpi lower intake base, it costs about $450.

 

id figure be best bang for buck the shorty headers should bolt up correct

 

my tbi lines bolted up no problem. if you dont have the wiring harness from the 87 then re pin your computer to the 730 ecm. if you do have that harness then its fairly easy. plugs in the same BUT you have to swap a few wires around. took me all of 2 hrs to swap harnesses then make the changes.

 

i just sarted to my cam swapp!!! so whileihave everything off imma do the swapp and of course make a thread first time doing it imm excited but i did break the distibutor boot my cars gonna be out of commmision for a ateast till november but probally even longer gotta make second payment on tpi setup then buy new water pump new fan and rocker arms eitherr buy tpi heads or just make tbi heads specs the same as tpi then after that rear end gear any idea on good parts
open to opinions
feul pump
fan maybe double
water pump
rocker arms
imm use the lt1 liftrs sprins and cam
and heads

keep yall updated!

 

good luck. hope you enjoy the swap. i know i have!

 

so far i have enjoyed there tear down but came across some bad news
lol broke some parts to
(by the way first time ever doing this cam swapp and tbi swap to tpi)

taked off the intake manifold and there wuz antifreeze there sothinking sighn of blown head gasket .. . . . .


any info anyone has be nice

got some pics postem up soon


i was wondering about serpitine system
any changes need to be made?

also im taking out ac and condenser and gonna replace pulley parts (water pump etc.) with aluminium ones to save weight

with taking out ac i will be using a diff belt setup anyone else do this and can it be done?? thanks

 

by the way gettin ecm wire harness and tpi setup from a 87! gonna be a longbuild though gonna be fun

 

How much antifreeze where? Don't forget that by pulling the intake you're going to have some antifreeze in the engine. If it's milkshaked that's another issue entirely of course.

 

illhave to take pic tomorrow after work to show yall cant really tell