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a_kelley

a_kelley

mechanical fixer
Joined
Jan 26, 2010
Location
Rutherfordton
O great ones of the chevies..

Is there any way to go from CPI to SFI? In other words is there any way to make either my CPI[95 S10 Blazer 4.3L] intake work on an SFI[96 S10 4.3L] motor??

The intake has me stumped... The ports don't line up.. Is this an impossible feat? Basically can I rewire the SFI spider to run as the Central injector? Tie all 6 hots together and all 6 colds together and make the computer "believe" its a single central injector? fuel pressure compatible?

Nevermind getting the motor out that was no small task..
 
Different heads. Completely different. I tried sticking a 92 CPI block and heads in my 96 and thats when I found out. If you swapped the heads to a 96 plus then you could run the SFI intake. Fuel pressures would be the same, but if Im not mistaken the SFI spider needs the obdII computer to operate as efficiently as it can. In other words, its no small fleet. I wouldn't even bother doing it. There isn't any point or real gain in swapping them.
 
96superflow said:
Different heads. Completely different. I tried sticking a 92 CPI block and heads in my 96 and thats when I found out. If you swapped the heads to a 96 plus then you could run the SFI intake. Fuel pressures would be the same, but if Im not mistaken the SFI spider needs the obdII computer to operate as efficiently as it can. In other words, its no small fleet. I wouldn't even bother doing it. There isn't any point or real gain in swapping them.
Click to expand...

well yes to run the SFI injector *properly*, you would need the SFI harness.. however.. I was wondering since I have a good SFI block/head/intake and a presumably bad CPI block/head that maybe I could use the SFI block/head/intake by tying all 6 pairs injector wires together to make them fire the same way the CPI injector does.

I'd just hate to go and do all that work of putting it back together and in the blazer and have it not run..
 
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