Whipple SC, which HPFP pump to buy??

brettman · 06-26-2017, 06:59 PM

Sending my Whipple SC back for repair, SO, HPFP will be right there for replacement.
With all the controversy on these fuel systems, Is it the 2017 ZL1 pump?
I know, about $300.00. I am SO tired of "F" with this thing and NO drive time.
OR, a couple hamsters with a hand pump?? That would be cheaper, right?

brettman · 06-26-2017, 08:02 PM

Just got off the phone with my GM factory guy. States 600 RWHP supported on stock
(SS) fuel system. OK, I guess I'm good. Also stated that the engine will handle "MUCH" more then that (rev limit at 6500 rpm) is comfort..lol.

aka Reckless · 06-27-2017, 12:23 PM

The high pressure pump is the LT4 one that mounts behind the intake manifold.

LibertyHill · 06-27-2017, 02:24 PM

When mine was dynoed low pressure fell off first then the high pressure drop followed. Havent read any other confirmation of this? I started with DMS low-side upgrade, will eventually have both, but don't see the value in a high-side upgrade without the low.

toohighpsi · 06-28-2017, 12:16 AM

Quote:

Originally Posted by LibertyHill

When mine was dynoed low pressure fell off first then the high pressure drop followed. Havent read any other confirmation of this? I started with DMS low-side upgrade, will eventually have both, but don't see the value in a high-side upgrade without the low.

It's OK if the low side falls off some, it's simply a transfer pump and has no effect on the HP pump unless it gets pretty low. Using the Big Bore HPFP with the stock low pressure side I ran up to 700 RWHP before replacing the low side. I hadn't run out of fuel on the high side, but low pressure was down to about 20 psi and I didn't push it any further. Switching to the ZL1 got me back to about 45 psi at 730 RWHP.

LibertyHill · 06-28-2017, 01:12 PM

Quote:

Originally Posted by toohighpsi

It's OK if the low side falls off some, it's simply a transfer pump and has no effect on the HP pump unless it gets pretty low. Using the Big Bore HPFP with the stock low pressure side I ran up to 700 RWHP before replacing the low side. I hadn't run out of fuel on the high side, but low pressure was down to about 20 psi and I didn't push it any further. Switching to the ZL1 got me back to about 45 psi at 730 RWHP.

By Big Bore you mean the LT4 HPFP AND injectors right?

toohighpsi · 06-29-2017, 02:28 AM

Quote:

Originally Posted by LibertyHill

By Big Bore you mean the LT4 HPFP AND injectors right?

Big Bore is the Lingenfelter Pump. I was running it along with stock LT1 injectors up to 700RWHP, I am now running LT4 injectors with it.

06-26-2017, 06:59 PM	#1
brettman Drives: 2016 Camaro SS Join Date: Mar 2017 Location: Cleveland, Ohio Posts: 912 View My Garage	Whipple SC, which HPFP pump to buy?? Sending my Whipple SC back for repair, SO, HPFP will be right there for replacement. With all the controversy on these fuel systems, Is it the 2017 ZL1 pump? I know, about $300.00. I am SO tired of "F" with this thing and NO drive time. OR, a couple hamsters with a hand pump?? That would be cheaper, right?

06-27-2017, 02:24 PM	#4
LibertyHill Drives: 16 2SS 6MT NPP MRC / 15 K1300S Join Date: Mar 2016 Location: NW of Austin Posts: 1,034	When mine was dynoed low pressure fell off first then the high pressure drop followed. Havent read any other confirmation of this? I started with DMS low-side upgrade, will eventually have both, but don't see the value in a high-side upgrade without the low. __________________ Rohana RFX-5 10/11, M/T 275/305, Eibachs, Hellwigs, Hurst SS, DMS LT4 SC 596HP/589TQ, DMS Low-side, Kooks 2LTs, MBRP Race, Rotofab, MMS CC

06-26-2017, 08:02 PM	#2
brettman Drives: 2016 Camaro SS Join Date: Mar 2017 Location: Cleveland, Ohio Posts: 912 View My Garage	Just got off the phone with my GM factory guy. States 600 RWHP supported on stock (SS) fuel system. OK, I guess I'm good. Also stated that the engine will handle "MUCH" more then that (rev limit at 6500 rpm) is comfort..lol.

06-27-2017, 12:23 PM	#3
aka Reckless Drives: 2016 2SS Camaro Join Date: Sep 2016 Location: Cumming, GA Posts: 541	The high pressure pump is the LT4 one that mounts behind the intake manifold.

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