Anybody upgraded to MFI?

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iamdub

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I haven't personally. But I know it's a great solution for those needing more fuel such as for a huge cam in racing applications and turbo- and supercharging. You looking at doing a marine intake manifold conversion?
 
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4myfreedom

4myfreedom

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I haven't personally. But I know it's a great solution for those needing more fuel such as for a huge cam in racing applications and turbo- and supercharging. You looking at doing a marine intake manifold conversion?
Idk want better injection not keen to marine


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bigfootchiro

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Are we talking about the upgraded MPFI unit to replace spider or marine intake injectors? The MPFI was the upgraded GM unit, because they noticed how horrible of a design was on the CSFI or “spider”. I upgraded to MPFI and it’s worth it. Easy to do too. Done it a few times.
 
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4myfreedom

4myfreedom

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Are we talking about the upgraded MPFI unit to replace spider or marine intake injectors? The MPFI was the upgraded GM unit, because they noticed how horrible of a design was on the CSFI or “spider”. I upgraded to MPFI and it’s worth it. Easy to do too. Done it a few times.
The answer I was looking for brother where did you get yours my bro and me have 1999 Tahoe sport and want do as soon as weather breaks


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true95w/t

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The answer I was looking for brother where did you get yours my bro and me have 1999 Tahoe sport and want do as soon as weather breaks


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I bought mine from summit. Bought upgraded spider and the new hold down for 272 to my door


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Shaw520

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I did the GM upgrade from CPI to MPI to my 00' HD2500, the last yr of the 5.7,....it was a huge improvement in every way, ran better, more power, better gas mileage. It cost me like $485 for the A/C delco MPIU
 

My99Yukon

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I just did the MPFI conversion. Not too difficult and huge improvement. Everyone running an old 5.7 should consider it.
 

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