TPI with C5 filter/regulator?

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Jan 19, 2012 | 03:42 PM

moonsteel

Thread Starter

Holley HP EFI w/TPI

Joined: May 2009

Posts: 553

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From: Kanata ON

TPI with C5 filter/regulator?

Anyone know of a reason I can't use the C5 FPR/filter with an external pump for my TPI swap?
I can't think of one.

Jan 19, 2012 | 04:05 PM

Gordonm

Race Director

Joined: Dec 1999

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From: Forked River NJ

Fuel pressure. Cant remember what the tpi runs at but the C5 ones gives about 60 psi. TPI as I recall runs at a lower pressure

Last edited by Gordonm; Jan 19, 2012 at 05:58 PM.

Jan 19, 2012 | 04:56 PM

mrvette

Team Owner

Joined: Jul 1999

Posts: 65,492

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From: Orange Park Florida

Quote:

Originally Posted by Gordonm

Fuel pressure. Cant remember what the tpi runs at but the C5 ones givecabout 60 psi. TPI as I recall runs at a lower pressure

YES, in the 40-42 psi region....run the pump without engine...

with engine idling it's closer to 35 psi....full mani vac to the regulator or whatever sending unit is involved....

Jan 19, 2012 | 04:56 PM

moonsteel

Thread Starter

Holley HP EFI w/TPI

Joined: May 2009

Posts: 553

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From: Kanata ON

TPI runs in the mid 40s IIRC.

Jan 19, 2012 | 05:04 PM

moonsteel

Thread Starter

Holley HP EFI w/TPI

Joined: May 2009

Posts: 553

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From: Kanata ON

There goes my short return line idea

Jan 19, 2012 | 06:19 PM

MrForce

Pro

Joined: Jun 2004

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From: Miami FL

St. Jude Donor '11, '14

TPI/C5 reg

Quote:

Originally Posted by moonsteel

Anyone know of a reason I can't use the C5 FPR/filter with an external pump for my TPI swap?
I can't think of one.

Unless you gut it, there is still the regulator on your fuel rail crossover, with the return.

The pressure difference (3 bar vs. 4 bar) is no problem if your tuner does the math for the difference in fuel flow.

The factory ECU may harder to program given the fact that the C5 reg is not vacuum referenced.

Rob

Jan 20, 2012 | 11:07 AM

moonsteel

Thread Starter

Holley HP EFI w/TPI

Joined: May 2009

Posts: 553

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From: Kanata ON

My plan was to remove (or gut) the rail FPR.
I'm the tuner (done megasquirt twice and SDS once), I'm planning to install the holley EFI HP kit http://www.holley.com/550-601.asp

Sounds like it is feasible, are there guys running 4 bar?