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tbi to tpi conversion

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tbi to tpi conversion

ruben89 ruben89
New User | Posts: 4 | Joined: 10/08
Posted: 10/12/08
06:38 PM

any body converting from tbi to corvette-camaro tpi well its alot easier than you think any questions just ask  

Demal Demal
New User | Posts: 1 | Joined: 10/08
Posted: 10/16/08
10:41 PM

Looking to covert my 1990 chevy silverado fron TBI to TPI. Need a how to book.  

jgl4444 jgl4444
New User | Posts: 1 | Joined: 08/09
Posted: 08/01/09
08:34 PM

I am going to attempt to do a tbi to tpi conversion.How should I start.
Thanks for your time.  

gunjunkie gunjunkie
New User | Posts: 1 | Joined: 10/09
Posted: 10/05/09
05:21 PM

Hi I have a 95 chevy tahoe with a 350/tbi , i'm looking to convert it over to a tpi system , any help out there ? thanks  Confused  

New User | Posts: 6 | Joined: 02/12
Posted: 02/17/12
08:47 AM


adam1989 adam1989
New User | Posts: 1 | Joined: 07/12
Posted: 07/06/12
11:34 AM

i have a 89 chevy 350 tbi wanting to convert to big block 454 any suggestion how how to go about that and will it work with same wire harness  

waynep71222 waynep71222
New User | Posts: 15 | Joined: 05/12
Posted: 07/08/12
07:56 AM


454s also came TPI... up through i think 1992 is a direct swap.. as the computer should be in the same location...

you might be able to get the 350 harness to fit... but it is going to be tight in some areas...

to remove the 454 or the 350...  with the computer in the dash board..

get under the dashboard... unplug the computer... plug the connector to the dash harness..  remove the U shaped clip that holds the ELBOW to the outside of the firewall...  the clip is on the inside.. the harness end under the dash pushes through the hole and comes out with the Complete motor...   this allows the ground connections that are on the back of the head to be properly connected before installation..

if you really want to wake your 350 TPI motor up....  if you don't have to rebuild the bottom end..

swap on a set of vortec cylinder heads...   these have the wrong bolt pattern.. but can be drilled or some of the aftermarket versions come drilled for both patterns..

if your block needs rebuilding.. stroker.. build a 383 with the vortec heads and the TBI.  you will need to either swap in some police car TBI injectors or the smaller of the 454 injectors..

you will also want to look around for an OBD1 scan tool.. so you can see what the computer data stream is... makes it a LOT easier to know what needs to be done...  make sure the OBD1 scan tool actually displays live data for the OBD1 gm.. not all current new ones show more than codes and codes won't fix your truck..