Testing another new product
#1
Testing another new product
This time it’s a new Hyd roller lifter.
As the industry moves away from flat tappets, you can’t have too many manufacturers making Olds/Pontiac Hyd roller lifters. Theses are made from both domestic and overseas parts so we’ll see how they do in a thorough test. I have another roller build in line or I may run them in my small block mule. Either way I’ll let you know the results.
Thanks.
As the industry moves away from flat tappets, you can’t have too many manufacturers making Olds/Pontiac Hyd roller lifters. Theses are made from both domestic and overseas parts so we’ll see how they do in a thorough test. I have another roller build in line or I may run them in my small block mule. Either way I’ll let you know the results.
Thanks.
Last edited by cutlassefi; November 19th, 2022 at 05:34 AM.
#3
This time it’s a new Hyd roller lifter.
As the industry moves away from flat tappets, you can’t have too many manufacturers making Olds/Pontiac Hyd roller lifters. Theses are made from both domestic and overseas parts so we’ll see how they do in a thorough test. I have another roller build in line or I may run them in my small block mule. Either way I’ll let you know the results.
Thanks.
As the industry moves away from flat tappets, you can’t have too many manufacturers making Olds/Pontiac Hyd roller lifters. Theses are made from both domestic and overseas parts so we’ll see how they do in a thorough test. I have another roller build in line or I may run them in my small block mule. Either way I’ll let you know the results.
Thanks.
#10
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Join Date: Aug 2012
Location: Colorado Springs Colorado/Thousand Oaks Ca
Posts: 1,719
#13
#14
#15
#18
thats because you don’t do it like that.
min wall has to be .031 which means an Olds .921 needs be honed out or reamed .045” over
there are a few company’s that make .904” ID bushings with the needed OD
min wall has to be .031 which means an Olds .921 needs be honed out or reamed .045” over
there are a few company’s that make .904” ID bushings with the needed OD
#19
Why not bush them back to .842" ? (.921 - .842" = .079" /2 = .0395" wall bushing) The smaller diameter lifters would be lighter.
#21
#25
No this is from another manufacturer. I’ve already used a few sets of the new Comp lifter, seems to work fine.
However the solid cartridge won’t be out until next year. They’re still working on supply of the current Hyd version.
#26
#27
Somebody correct me if I'm wrong. The .921 lifters are ideal for flat tappet use because of the larger diameter and you can be more aggresive with the cam. With the hydraulic rollers it's not that advantageous.
#28
Hmmm kind of. Yes the .921 is the best of the flat tappet family. BUT there are lots of roller profiles that are just as aggressive or even more so.
#29
#32
No roller , even with the biggest wheel available, can accelerate the lifter as fast as a big dia flat tappet…it’s just not possible. The side loading on the wheel would self destruct it.
the crossover point is somewhere around .175” to .200” tappet lift where it’s possible for a big wheel roller to take over .
the wheel diameter on a roller would have to be something like 4 feet in diameter to allow a roller lobe to smack the wheel with the same dynamics to accelerate the lifter like a big diameter flat tappet.
#33
#34
#35
There are pros and cons to larger lifters. Obviously a smaller diameter lifter could be lighter, but you can also use a larger wheel with a larger diameter lifter which slows down the wheel speed as well and give a degree or two more effective duration.
I have two DX builds upcoming. We just reamed them to use the .937 solid roller offered by Isky, BAM, and others. We’ll see how it does but I expect good results.
I have two DX builds upcoming. We just reamed them to use the .937 solid roller offered by Isky, BAM, and others. We’ll see how it does but I expect good results.
#36
#37
This time it’s a new Hyd roller lifter.
As the industry moves away from flat tappets, you can’t have too many manufacturers making Olds/Pontiac Hyd roller lifters. Theses are made from both domestic and overseas parts so we’ll see how they do in a thorough test. I have another roller build in line or I may run them in my small block mule. Either way I’ll let you know the results.
Thanks.
As the industry moves away from flat tappets, you can’t have too many manufacturers making Olds/Pontiac Hyd roller lifters. Theses are made from both domestic and overseas parts so we’ll see how they do in a thorough test. I have another roller build in line or I may run them in my small block mule. Either way I’ll let you know the results.
Thanks.
#39
I wish I knew why Olds did a lot of different things. I've never understood why they used 39* & 45* blocks. They used both during the same model year run some years. As far as the .921 lifter goes maybe they were planning on using some better cams but never did. According to some it's irrelevant but it sure helps a guy who wants to run a very aggresive cam.