96TurboWV

96 Eclipse GST

91 Acura Integra GS

good info... thanks

gasaraki

1992 Plymouth Laser RS AWD

Hmmmm. That's something I would of never thought of. I'm gonna have to look into that when I rebuild my motor in a few months.

Eclipse5150

95 Eclipse GST 6 bolt

95 toyota tacoma

Very good idea. I am in the middle of building a motor, It's gots me thinking.... Thanks.

PandaMan

1995 Eagle Talon TSI AWD

2000 BMW 323i

1999 Eclipse GS, 1997 Eclipse GSX (sold)

Great way to get us thinking...
I am going to be doing some engine work this summer and that would be a great start to some solid modifications.
Thanks for putting the time in to write it up.

supa_dupa_man

Project RST-4 (96 Eclipse RS-T)

`97 Eclipse GST - parts car

So are the lifters the same between the 420a and the 4G63? I believe they may be... I have some really nice Crane lifters in my 420a... have not thrown one yet... hope I never do.

InspiredAuto

1991 Eagle Talon TSi

1998 Mitsubishi Eclipse GSX

2006 Toyota Tundra TRD

You mentioned that Shep used them and then went back to the 3G lifters. Do you happen to know if any of the other major vendors like AMS and Buschur are using them in their Drag/Dyno cars?

greengoblin

95 Talon

2005 Scion Xb

2007 Mazda CX-7

The 3g style apparently pump up too much in the topend making the valves float 10-20 thousandths.

FP recommends 1g style for high revving 5R/4R applications, etc. for this reason. Jake Montgomery switched back to the 1g's and gained quit a bit.

Actally straight off Fp's site.

"For very high RPM applications we recommend using the early DSM style HLA's (they have a smaller diameter plunger) and reducing oil pressure to the HLA oil galley by using the early JDM oil regulator or a restricted orifice in the oil distribution block. These two items reduce HLA pump up effects. "

Found here:Forced Performance Turbochargers: DSM FP 5R Cam