Hydraulic Rollers

Andy G · 02-15-2015, 03:31 AM

When checking the NHRA engine specs for the 1987, 307/138 olds I see that the diameter for these roller lifters is .698".
Is there an advantage to the smaller diameter lifter? I would think that that the larger diameter would be more stable in the bore at higher RPM. The smaller diameter would be lighter. Is the diameter a factor in choosing the better lifter for stock eliminator?

02-15-2015, 03:31 AM	#24
Andy G Junior Member Join Date: Aug 2007 Posts: 4 Likes: 6 Liked 8 Times in 2 Posts	Re: Hydraulic Rollers When checking the NHRA engine specs for the 1987, 307/138 olds I see that the diameter for these roller lifters is .698". Is there an advantage to the smaller diameter lifter? I would think that that the larger diameter would be more stable in the bore at higher RPM. The smaller diameter would be lighter. Is the diameter a factor in choosing the better lifter for stock eliminator?