Anyone use a hydra-rev kit?
Thread Starter
Pro
Joined: Apr 2003
Posts: 517
Likes: 0
From: South Lyon Michigan
Anyone use a hydra-rev kit?
I am thinking about getting a hydra rev kit for my engine and I was wondering if anyone has used this and if it helped or not?
All comments appreciated.
http://www.sallee-chevrolet.com/AFR/hydra-rev.html
All comments appreciated.
http://www.sallee-chevrolet.com/AFR/hydra-rev.html
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
According to the guy's at AFR the kit is bull and gives you nothing.
But it will lighten your wallet.
I almost bought one.
I also asked the guys at T&D and they said the same thing.
YOu will have to decide.
I spent $2500.00 with AFR and $1100.00 with T&D for shaft rockers .
I don't think they would lie after they got so of much of my money.
But it will lighten your wallet.
I almost bought one.
I also asked the guys at T&D and they said the same thing.
YOu will have to decide.
I spent $2500.00 with AFR and $1100.00 with T&D for shaft rockers .
I don't think they would lie after they got so of much of my money.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by REDC4CORVETTE
According to the guy's at AFR the kit is bull and gives you nothing.
But it will lighten your wallet.
I almost bought one.
I also asked the guys at T&D and they said the same thing.
YOu will have to decide.
I spent $2500.00 with AFR and $1100.00 with T&D for shaft rockers .
I don't think they would lie after they got so of much of my money.
But it will lighten your wallet.
I almost bought one.
I also asked the guys at T&D and they said the same thing.
YOu will have to decide.
I spent $2500.00 with AFR and $1100.00 with T&D for shaft rockers .
I don't think they would lie after they got so of much of my money.
I agree, for the most part in theory it would work, in reality it lightens your wallet considerably. IMHO get a set of good lifters, Comp Rs, Morels, or get a set of reworked OE lifters from Sherman Racing. The reworked OE lifters are just that, stock lifters with their internals replaced making them a virtual solid lifter. These have about .040 to .060" of actual hydraulic movement. They are installed at "zero" lash with NO preload. I have buzzed these to 7000+ RPM with no problems. These are used on a NHRA stock eliminator car where NHRA rules mandates the use of an OE roller lifter. We can't run any kind of rev kit in these cars. Use the forementioned lifters with the correct springs you wouldn't have any problems in a street application.
Race Director
Joined: Dec 2002
Posts: 13,348
Likes: 233
From: SCMR Rat Pack'r Charter Member..Great Bend KS
The link says "can add up to 100 more horsepower!"
Not by itself it can't.
If you also install a more aggressive camshaft, you might see more hp, but the same thing can be achieved simply by going to the recommended valve springs for that cam.
If your stock valve springs have sacked out to the point where the engine can no longer rev into it's powerband, then this thing might get you back to stock power, but that would be just a band-aid.
Simply making your valve spring rate higher (which is all this does) will not give you more horsepower; if anything it will reduce power through higher friction.
Caveat emptor.
Larry
code5coupe
Not by itself it can't.
If you also install a more aggressive camshaft, you might see more hp, but the same thing can be achieved simply by going to the recommended valve springs for that cam.
If your stock valve springs have sacked out to the point where the engine can no longer rev into it's powerband, then this thing might get you back to stock power, but that would be just a band-aid.
Simply making your valve spring rate higher (which is all this does) will not give you more horsepower; if anything it will reduce power through higher friction.
Caveat emptor.
Larry
code5coupe
Thread Starter
Pro
Joined: Apr 2003
Posts: 517
Likes: 0
From: South Lyon Michigan
Thanks guys, sounds like I won't be wasting my money on these. My worry is that my exhaust springs are only rated to .540 lift and thats right where my cam is at, everything is new but as soon as the springs start getting worn I will probably will just get new valve springs.
