I am contemplating a swap to a hyd roller b/c I am tired of setting valve lash. Anyway, if I install the Hydra-Rev kit, what kind of RPM can I turn, without going into valve float (assuming approx 350lbs open spring pressure and using comp's roller lifters)? Also, do they make this kit for a BBC? How much is it for either application?

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Black 89 IROC...355, Solid Crower Cam, TFS heads.
12.0 @ 120.3mph with a 1.9 60ft...all motor

 

With the right springs and some good TITANIUM retainers and locks, you can turn 6500 with the AFR Hydra-rev kit. As far as I know, they don't make a setup for the GEN. VI blocks yet. I have an OEM Hydra-rev kit in my current setup that I will be re-using in my 383 with COMP CAMS "R" series lifters. With the valvetrain that I will be using, I will make power in the 6600-6800 RPM's. A lot of LT-1 guys are spinning their engines up to 7000 RPM's with the "R" lifters, and a good sound valvetrain. DEFINITELY get a matched spring set, and those TITANIUM retainers and locks. HTH's

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88 Monte SS 355 TPI/LT-4 HOT CAM/AFR Hydra-rev/ T-56 6-Speed/ PRO-5.0 shifter/ 1-3/4" full length headers/3" X-PIPE assembly/ 8.5" G-80 rear with 3.73 gears.
http://community.webshots.com/user/ssynergy
www.y-t-g.com/88monte

 

I put together a 350 for a friend tht would pull 7000 n/p with the hydra rev. I don't think there is a BB version. That was with a set of springs that came on the AFR195s and steel retainers.

[This message has been edited by jcb999 (edited September 13, 2001).]

 

AFR may not sell a BBC rev kit; others however do. Comp I know for sure does; I'm pretty sure Lunati does; there may be others.

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"So many Mustangs, so little time..."
ICON Motorsports

 

rb, these are a little differnt than standard rev kits being they are for hydraulic lifters. The buttons on top have to clear the connectors for the lifter pairs.

 

What even is this Hydra rev kit thing?

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Accel High Flow TPI Baseplate, Edelbrock TES 1 5/8" Headers, Catco 3" High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, Jet TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.32 @ 97.7mph
(corrected for elevation)

 

It is sort of like an extra set of vavlve springs that fit inbetween the head and the lifter, to help the lifter follow the cam lobe at higher RPM's.

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Black 89 IROC...355, Solid Crower Cam, TFS heads.
12.0 @ 120.3mph with a 1.9 60ft...all motor

 

It looks like this:
http://24.1.139.249/images/120100/

And you can find more info at AFR's webpage at http://www.airflowresearch.com/


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

There is a company that makes a clone of the AFR kit. They also make a big-block version. Both are 100bucks.
You can get them from www.competitionproducts.com (maybe not online though)