I have an AFR hydra rev that I want to use, but my enginer builder says if I have the right springs I wont need it. He also says that they have been known to eat lifters/cams. Anyone had this problem??

 

I've had the AFR Hydra-rev kit for a little over 2 years now, and with NO PROBLEMS. I don't know what he's talking about. I also know many 4th GEN guys with a Hydra-rev, and "R series" lifters included, and they work fine. Tell him to show you proof, and/or just install the damn thing. Remember, the springs in the AFR Hydra-rev kit, and all REV KITs, just PREVENTS the lifter from bounching on the cam, they DO NOT PUSH on the lifter plunger. I will be re-using mine with my CC P/N 875-16 "R" series lifter with my high revving 383. HTH's

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88 Monte SS 355 TPI/LT-4 HOT CAM/Fully ported 1990 Corvette L-98 heads/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 can see a rev kit adding too much pressure for flat-tappet cams, but the spring pressure from the rev kit shouldn't affect the roller cams.

 

88SS6speed, what does your car run?

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355 c.i.
Dart 180 Heads
Lunati 224/224 cam
Harland Sharp 1.5 rockers
Performer RPM Manifold
Holley 600 cfm double pumper
Hooker Super Competition Headers
Flowmaster Exhaust
Competition Engineering Sub-frame connectors
Super T-10
GM posi 3.42 rear
Hurst Roll Control
13.9@102

 

I've had my AFR Rev Kit on my engine since February, and no problems with it. I've got pics if you wanna see it installed.

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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=-

 

Kevin91Z, did you notice any difference or are you just using it more as an insurance kinda thing?

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14.62@96mph headers, muffler, chip, ghetto stuff, duct tape
89 GTA 305 TPI 5 speed 3.42 gears

 

If you choose the right valve springs (less pressure), they shouldnt be a problem with flat tappet cams either.