AFR hydra-rev kit wears down engine.......
#1
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Car: 1987 GTA originally 350TPI 3.27posi
Engine: 383 C.I.D.
Transmission: 700R4
AFR hydra-rev kit wears down engine.......
I want to put one on but the "experts" suggest its a track only mod. Reason is that the added pressure at the springs somewhat chokes or cuts oil lubrication to the engine. Not good for a daily driven vehicle. My 383 AFR Miniram engine is being put together and its going to be a daily duty car. The cam is an Isky 225/234 .505/.530 at 112. Is there some truth to this? Educate me.
#2
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Car: 04 GTO
Engine: LS1
Transmission: M12 T56
I have never heard of such a problem. There really isn't much 'added' pressure from the rev kit, it is simply a set of springs that push on the lifter body to help control the weight of the lifter while allowing you to run a lighter valve spring to keep the lfter from getting collapsed. (simplification, and i'm sure you know this, but others reading it might not.) I reckon that you would still be running a little more pressure on the roller itself, but since it's a roller, i don't think it will hurt anything by way of increased friction/oil film breakdown at the cam. Maybe it wouldn't be a good idea for an engine you wanted to last 200k miles, but any engine that is spinning in rev kit range shouldn't have that goal anyway.
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I've also heard that with the use of the hydra-rev kit, adding the extra spring pressure directly onto the lifters, you can use a lower spring pressure on the rocker side, and effectivly overall still achieve the same goal.
------------------
Rob
'86 TA 305 TPI
Gutted MAF, Ported Plenum
TB Bypass, Home made Cold Air Intake,
Edelbrock T.E.S.
48psi regulator, (Nickel method)
------------------
Rob
'86 TA 305 TPI
Gutted MAF, Ported Plenum
TB Bypass, Home made Cold Air Intake,
Edelbrock T.E.S.
48psi regulator, (Nickel method)
#4
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I've never heard of that. I've got the AFR kit on my car, and its a daily driver. No problems.
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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=-
------------------
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=-
#5
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Car: 88 Monte SS
Engine: Super-rammed L-98 383
Transmission: T-56 6-Speed
Axle/Gears: 8.5" G-BODY G-80 3.73
My AFR Hydra-rev kit has been in my car for 2 years now, and NO PROBLEMS like Kevin. Definitely a DAILY DRIVER.
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88 Monte SS 355 TPI/LT-4 HOT CAM/AFR Hydra-rev/ T-56 6-Speed/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
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88 Monte SS 355 TPI/LT-4 HOT CAM/AFR Hydra-rev/ T-56 6-Speed/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
#6
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Car: 1987 GTA originally 350TPI 3.27posi
Engine: 383 C.I.D.
Transmission: 700R4
Great news. The guy who told me this has a Nova with a Big Block running solid lifters with .600 lift cam and a rev kit. May be in his case it would apply but by the overwhelming respose for the hydra rev it seems this does not apply. Thanks alot guys. I could always count on first hand experience of this site. Then my next question is where can I buy one besides AFR that might have it in stock right now?
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#9
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aren't those also supposed to increase high end HP?
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- David
88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT
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- David
88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT
#12
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Car: 1988 Pontiac Firebird Formula
Engine: 5.7 TPI
Transmission: 700R4
The Rev kit was mostly designed to prevent you from losing oil pressure should you toss a pushrod at high rpm. The springs and such will help the lifter stay in the bore should a pushrod break. (yep, personal experience.... can you say "bye bye engine...") The rev kit would have saved me a pretty penny.......
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