CAMARO6 - View Single Post - Stanadyne Goliath high pressure fuel pump!?

ZLRob · 11-14-2025, 08:16 AM

I run the XDI version of the Goliath which I believe may be the most recent iteration of it. The problem with them was that a lot of people were installing it by just sending one side of the bolts all the way home and then tightening the other side (which is an absolute no no anyways and should be common sense but here we are) so the springs were sitting in there all cocked which would ruin them, and by ruin I mean breaking of the smaller secondary spring. That and these set ups are a little more sensitive on install compared to the LT4 HPFP. It's really made for folks who run 32% fuel lobes on their cam set ups and I believe that may have been confirmed by Stanadyne themselves if I remember correctly. Anything more than that and you will run into issues. So if you have a 38 or a 42% lobe you're out of the running for one of these.

I've been beating the shit out of it since I installed it without a single problem. So much so, that I no longer see the need in keeping my old LT4 HPFP as a backup.

The only caveat is that it is louder than the LT4 pump so expect some added fuel pump noise in the engine bay. It is what it is.

11-14-2025, 08:16 AM	#5
ZLRob Super Stock Drives: Chevrolet Camaro ZL1 Join Date: May 2022 Location: Concordia Posts: 1,004	I run the XDI version of the Goliath which I believe may be the most recent iteration of it. The problem with them was that a lot of people were installing it by just sending one side of the bolts all the way home and then tightening the other side (which is an absolute no no anyways and should be common sense but here we are) so the springs were sitting in there all cocked which would ruin them, and by ruin I mean breaking of the smaller secondary spring. That and these set ups are a little more sensitive on install compared to the LT4 HPFP. It's really made for folks who run 32% fuel lobes on their cam set ups and I believe that may have been confirmed by Stanadyne themselves if I remember correctly. Anything more than that and you will run into issues. So if you have a 38 or a 42% lobe you're out of the running for one of these. I've been beating the shit out of it since I installed it without a single problem. So much so, that I no longer see the need in keeping my old LT4 HPFP as a backup. The only caveat is that it is louder than the LT4 pump so expect some added fuel pump noise in the engine bay. It is what it is. __________________ 2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% lower, Griptec OE upper, NGK HR7 Ruthenium plugs, Nostrum 25+ injectors, XDI Goliath HPFP, Katech dual in tank LPFP, Katech oil pump, LME tensioner, DOD delete, LT1 big fuel cam, Jokerz ported blower, MPI lid, GMS hood extractor bracket, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, 186* LS3 T-stat, Borla X pipe, Black Widow Angry Housewife/ Corsa NPP mufflers, BMR engine mounts, Banks iDash, Lithium Battery, AEM X- Series, HP Tuners, E85, 16.5 psi 758 HP/ 804 TQ Last edited by ZLRob; 11-14-2025 at 08:43 AM.