4g61t.org

Arp # 100-7717 I beleve...

scot

I got the studs at www.Raceeng.com They are kinda expensive, I paid like $95 shipped for the fronts.

Did a little work on the Mirage today

Weldon D2035-A, only good to 1800hp on Gasoline, Hope I dont need 2



-10 feeds the pump from the Tank, and twin -6 lines to each end of the rail



Looks like I meen business from the back

Do you know if the 4g61t and '90 4g63 oil pumps are identical? I don't have CAPS so I can't check, but I know the 90s run the straight cut gear set.

Im running a 4G61 oil pump on this 4G63, it has straite cut gears

just a word of advise, get that junk professional products fuel filter off of there, that thing is causing a major pressure drop.. You spent good money for a great pump, put the correct filter on there...

scot

The Filter is on the inlet of the pump, so even if it was restictive it isnt going to drop the pressure. Its just there to collect sedaments from the tank.

on the inlet its worse, 10 micros is WAY to small for that weldon pump, inlet filter has to be 100 micron. your starving that pump, it will hurt the pump.

scot

Its practically the same filter Weldon uses, they even recoment either a 10 or there 40 micron filter.

Weldon recommends a 40 micron before the pump (if your pump is the new design with the billet impellers), and the 10 micron after the pump. With the 10 micron on the suction side, it's to tight of a micron, and will starve (cavitate) the pump. Plus the Weldon filter has triple the sq-in of the Professional Products, with means as the small area in the p/p filter gets clogged, the pump has to such harder to obtain its fuel, reguardless of gravity feed or not. Not busting your balls, just trying to help. I sell the Weldon line, and have been down that road before with customers, send a pump back for warranty and Weldon can tell that it had the wrong inlet filter on ......

scot

Well I guess I will just order a 100 MC Weldon filter just to be sure, it would suck to fruit and banana up an $850 fuel pump..

Damn looks sick....

Where did you put the regulator if your feeding both ends of the fuel rail? I always thought it would look good to feed both sides, and fix fuel pressure losses in the rail. I was thinking if I ever needed to do that I would have to modify the middle of the fuel rail between #2 and #3 for the regulator.

One other question, what is the benefit of an oil pump with straight cut gears?

The early style straight cut gears when new, are less likely to walk out under pressure at high RPM's and cut into the casing, causing catastrophic pump failure. Only an issure for RPM out of the factory ranges IIRC. I could be wrong, but someone could help support this from experience or .....

One line is feeding the passenger side of the rail, the other line feeds one side of the regulator then from the regulator back to the Driver side of the rail. I got the idea from installing a few boost logic Supra twin pump fuel systems.