Shimming Hydraulic Flat Tappet Lifters

[Dan Fahey]

I run GM Rollers Lifters in my LT1

What advantage do Short Travel Roller Lifters they have over the GM Roller Lifters?

d

[Tom Turner]

What advantage do Short Travel Roller Lifters they have over the GM Roller Lifters?

About 30HP, Maybe more depending on your tenacity.

[Coleydog]

What they're saying, no loss of lift or duration with shimming. Now, just use a solid lifter
Mike

[ss3011]

Converting from a hydraulic lifter to a solid sounds good , but how does that work ? Wouldn't you have to develop a new camshaft ? Wouldn't you lose some lift due to whatever valve lash you use ? Are there some stocker profiles out there that are solid but are designed for very tight lash , say under .012" . Just asking , I am interested !

[Alan Nyhus]

Originally Posted by ss3011

Converting from a hydraulic lifter to a solid sounds good , but how does that work ? Wouldn't you have to develop a new camshaft ?

It depends on the lobe, of course. The acceleration ramps are theoretically different on a hydraulic vs. a solid profile. Many lobes will accept either style lifter with no issues.

Originally Posted by ss3011

Wouldn't you lose some lift due to whatever valve lash you use ?

Yes, you do. Since the lash isn't figured into the checking clearance (zero) a solid lifter combo is in the same boat already. On a 'hydraulic cam' that's been switched to solid lifters, .002-.003 lash (hot) is pretty normal.

Originally Posted by ss3011

Are there some stocker profiles out there that are solid but are designed for very tight lash , say under .012" . Just asking , I am interested !

Most solid lifter stocker cams that I'm around use lash figures in that neighborhood already.

Hope this helps. -Al

[ss3011]

So I guess the point is , is the benefit of a solid lifter worth the loss of whatever valve lift you would lose because of lash .

[killintime6968]

Who makes the best solid lifter for a bigblock chev. Would you use anything different if converting from hydraulic lifters.

Bruce Cameron
1968 Nova 396 E/S