Low lash solid roller vs. hydraulic roller
02-24-2016, 04:01 AM
#1
Low lash solid roller vs. hydraulic roller Anybody running a LLSR setup instead of hydraulic? Wondering how the profile would be different. Ex. Would a 232/400 Solid roller perform the same as a 232/400 hydraulic?
02-24-2016, 10:00 AM
#2
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For a CAMMOTION LLSR you need to add ~8* to the HR duration
to account for lash. So LLSR 240*/248* ~ HR 232*/240*.
Similar vacuum and Driveability with potential for
1000 RPM Increased RedLine.
to account for lash. So LLSR 240*/248* ~ HR 232*/240*.
Similar vacuum and Driveability with potential for
1000 RPM Increased RedLine.
02-24-2016, 11:27 AM
#3
Great. Thank you sir. I've always been concerned about exceeding 240 on duration. Heard that it's not recommended on LS3 without valve relief cut into piston. Is that a myth?
02-24-2016, 02:12 PM
#6
I'm running a LLSR in my LS2. Kip asked what profile I would want if it were a hydraulic and we settled on it being a 234/242. So the solid roller I received is spec'ced out to 239/247.
If you have the heads off just use a mic and measure valve drop. He can calculate what specs you can go up to and have enough PTV clearance.
The only thing I changed was the cam, lifters, and pushrods. Cam size went from 230/238 to 234/242. Car was running a best of 11.42 and now has went 11.33 with it being rich by 5%.
I'm using stock rocker arms on my setup with arbor shims to set the lash.
If you have the heads off just use a mic and measure valve drop. He can calculate what specs you can go up to and have enough PTV clearance.
The only thing I changed was the cam, lifters, and pushrods. Cam size went from 230/238 to 234/242. Car was running a best of 11.42 and now has went 11.33 with it being rich by 5%.
I'm using stock rocker arms on my setup with arbor shims to set the lash.
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02-25-2016, 05:52 AM
#12
LS1, PRC LS6 heads, T&D rockers, BTR platinum dual springs, Fast / NW 92, 1 7/8" headers, '02 Camaro, M6, street / fair-weather / Power Tour car that I road race now & then. I have not had the car on the dyno since I put the cam in last spring (made 415 on a Mustang dyno before the swap). Valvetrain noise was reduced 90%, power is great, very satisfied. The car idles / runs great but I do have some light-throttle bucking that I can't seem to fix. I'm tuning myself (EFILive) so that's part of the problem LOL. It took me 2 years tuning with my old cam (232/236 hydraulic roller) but I was able to remove 99% of the bucking but with the LLSR I haven't got it done.
