will 4.3 injectors work in a 3.1 ironhead?

[no_doz]

topic

[geoffinbc]

That is not enough info. What 4.3L and what 3.1L

[Rhedalert]

{reply}

[no_doz]

92 ironhead 3.1 out of a firebird (mpfi of course), and im talking 90-96?

[geoffinbc]

The only MPFI 4.3L that EVER existed was on the GMC Syclone and Typhoon.

So why would you want to use 4.3L injectors on a 3.1L?

[Guest]

The only MPFI 4.3L that EVER existed was on the GMC Syclone and Typhoon.

So why would you want to use 4.3L injectors on a 3.1L?

Yeah I love how people think we are mind readers.

[fivepointhustla]

The only MPFI 4.3L that EVER existed was on the GMC Syclone and Typhoon.

So why would you want to use 4.3L injectors on a 3.1L?

my 95 blazer and my friends 96 & 97 both have mpfi

[geoffinbc]

Nope sorry they are not MPFI in the typical sense. They are CPI and CSFI. The injectors are located centrally in the manifold. When the injectors open fuel travels through a hose to a poppet valve and is injected into the intake runner.

The CPI has one single large injecor and 6 poppet valves. Meaning it is batch fired.

CSFI has 6 smaller centrally located injectors and 6 poppet valves and they are sequentially fired.