Think I will need a chip?

[sled_dog]

Going back to my 89 Suburban for my daily driver but I want to do a little motor work. Will have, full length headers, stock heads with just a little port work and slightly stronger springs. Smallest camshaft that Comp Cams makes for this purpose, and finally a Holley intake and a 454 throttle body. Think I will need to get a new chip?

 

[smokkey1]

TTT couse I would like to know too.

 

[jac6695]

I had nearly the same combo on my BB. I used a Edelbrock Performer cam and intake. Engine ran great with the stock chip, except that the Oxygen sensor I moved to the collector would cool off at an idle and send the ECM into open loop. The engine ran rich in open loop, but would idle fine. I had also disconnected the AIR pump and EGR. The ECM would throw codes, but wasn't really a problem.

To answer your question, no you shouldn't have to, but I would since it so cheap to have one burned now and you should see more power as a result. Contact PCM For Less , they have a great reputation on the Impala and Camaro Boards. /forums/images/graemlins/thumb.gif

 

[K5MONSTERCHEV]

MAF? I wouldnt think so, you could always call somewhere like street and performance and ask them.

 

[SUBFAN]

This information seems to be like Voodoo....

 

[jac6695]

You are referring to a TBI 454 Chevy engine, right?

Did I respond with something that didn't make sense? /forums/images/graemlins/dunno.gif

I had an 87 454 in my Blazer until about a month ago.

 

[Hossbaby50]

I think he is talking about a 454 Throttle body on a SBC motor so it will flow more air.

I would say yes you will need a new chip for that combo. MAP (which TBI is) is very picky about stuff usually so it probably won't run right.

If you where running a MAF TPI or something that runs MAF then you might be ok but MAP systems are very finiky from what I hear.

Harley

 

[Thunder]

I dont think you will need a new chip. Just put the 350 injectors in the 454 TB. Also install an adjustable fuel pressure regulator and turn up the pressure so you can feed the better flowing engine a little more fuel.

 

[sled_dog]

doh I knew I was too vauge. Its my 350. I got a new motor today though. A Caprice 9c1(police car)350 with an L98 roller camshaft, think I will need a new chip anyway so screw it. Gonna put a carb intake on it I think, might as well.