what is the difference how much power will i lose or gain? I have a aftermarket solid lifter cam but my car is roller what all will i need to make the swap?

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87 gta 5.7ltr
edelbrock headers
gutted cat
flowmaster 3in drivers exit
8.8mm wires/accel
accel 300+digital ignition system
msd pro billet distributer
hypertech stage 2 racing chip
slp cold air intake
maf has no screens
52mm bbk throttle body
extruded plenum, runners, intake all matched
high flow fuel pump
afpr @ 50 psi
ALL MODS DONE BY ME FOR ME
waiting on hotchkis rear susp package
and sfc before i run hard at track

 

You really shouldn't need too much stuff. I switched my 355 to solid lifters and even though there is usually a slight performance loss the simplicity is quite a bit better and since I am switching to carb they'll run better with the carb...

All you need to change is the cam and the lifters themselves. There will also be a tin tray above the lifters (I think they call it the spider tray or something) You can pull that out, it isn't needed with the solid lifters. I don't know if you'll have to change push rods or not, I don't believe so though.

Lata,
mike

 

You will need new pushrods. The roller lifters a quite a bit taller than any flat tappet lifter, and they have shorter pushrods. You'll need a set of "standard" length pushrods, available anywhere.

The flat tappet lifters will drop right into the roller lifter bores. They will look kinda funny sitting "way down in there" but they will work just fine and the oil slots on the lifters and the block will line up just fine. Many factory engines use flatt tappet lifters in a roller block.

I beleive you can also resue the roller cam timing chain on a flat tappet cam, but not the other way around.

HP increase? Depends on the cam specs more than anything.

Remember to disable your knock sensor after the switch. Solid lifter clatter will drive the knock sensor bonkers, the ECM will whack out a ton of timing and the engine will generally run lousy if you don't.

[This message has been edited by Damon (edited December 10, 2001).]

 

I don't think you are gonna like setting the lash on those solid lifters all the time, though.

 

Damon,

How did you disable the knock sensor without tripping the SES light?

-=-Mike