H22 FPR differneces

[Stoner51]

So I am getting ready to put the RDX injectors in the H22. I have been gathering parts for a little while. I still have a few more to get. But here is my quesiton.

I will be buying a Beck/Arnley FPR. To go on the AEM fuel rail. Rock Auto has A different part # for 92-96 and 97-01.

I don't have a 92-96 service manual but is the pressure different between the two? Or does this likely just have something to do with the routing of the lines to the FPR.


97
http://www.rockauto.com/catalog/more...867&cc=1170201

94
http://www.rockauto.com/catalog/more...180&cc=1170087

I realize the pictures look different. I just want to make sure.
Thanks

steve

[Jarrett]

They shouldn't be the same part number. The F22A runs at a higher fuel pressure than the H22A does.

EDIT*
Looking at the different part numbers it seems that all the trim levels of Preludes have a different fuel pressure regulator.

The S with the F22A1 uses the PT6.
The Si with the H23A1 uses the P14.
The Si VTEC with the H22A1 uses the PT2.

So that must mean that the F20A DOHC runs at a lower fuel pressure than the F22A.

EDIT(2)*
Airtex shows their aftermarket fuel pressure regulator to be the compatible replacement for both the PT6 and P14 part numbers.

[Stoner51]

Is there a difference in the obd1 and obd 2 h22.

Edited my original post it appears I was wrong.

steve

[GhostAccord]

The F22A1 and H23 have the exact same fuel pressure and the H22A1 is lower, while the H22A4 is higher. I would imagine this pressure difference is due to the OBD1 H22A using 345cc peak and hold injectors. While the H22A4 uses 290cc saturated injectors.

F22A1/H23A1 (240cc P&H)
No vacuum = 36-43psi
With vacuum = 33-40

93-96 H22A1 (345cc P&H)
No vacuum = 28-35psi
With Vacuum = 24-31psi

97-01 H22A4 (290cc Sat)
No vacuum = 40-47psi
With Vacuum = 30-37psi