Hydra-Rev kits...
05-02-2009, 09:56 PM
#1
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Hydra-Rev kits... I know what they do but how exactly are they installed? Im gonna be getting one soon w/ my heads but am kinda confused on how they sit in there and who exactly it works...
05-09-2009, 10:54 PM
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I agree. The rev kit is a band aide for those who cannot figure out what spring pressures to run for their setups. If you are going with those heads you need to either call the cam manufacturer of the cam you are going to use or talk to AI to see what they would recommend for your cam profile.
05-09-2009, 10:57 PM
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I agree. The rev kit is a band aide for those who cannot figure out what spring pressures to run for their setups. If you are going with those heads you need to either call the cam manufacturer of the cam you are going to use or talk to AI to see what they would recommend and have them install the springs before they ship the heads out.
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05-10-2009, 12:24 PM
#9
Of course that moron "xx ED xx" won't, he is part of the "heard it, never done it, don't know what I am talking about, but I'll be an authority on the web" group on here...
No, as stated a rev-kit is a band-aide for those that don't know how to choose a spring for a given cam/rocker/rpm application. It is *really* helpful when you change a given combo and decide to add a rev-kit in lieu of changing out springs, thus it is considered a band-aide.
Manufacturers are also very good at recommending parts they sell to increase sales, thus most of the recommendations out there are from companies that also market them.
If you pick the right spring you will not need a rev-kit. And that goes for ANY application. I have built many high-hp and high-revving LT1s, which is much more 'real-world' than most that are posting on here, and none have needed a rev-kit.
No, as stated a rev-kit is a band-aide for those that don't know how to choose a spring for a given cam/rocker/rpm application. It is *really* helpful when you change a given combo and decide to add a rev-kit in lieu of changing out springs, thus it is considered a band-aide.
Manufacturers are also very good at recommending parts they sell to increase sales, thus most of the recommendations out there are from companies that also market them.
If you pick the right spring you will not need a rev-kit. And that goes for ANY application. I have built many high-hp and high-revving LT1s, which is much more 'real-world' than most that are posting on here, and none have needed a rev-kit.
05-10-2009, 01:43 PM
#10
Well when you start building and dynoing 650 - 900 horse small block chevies let me know. a push rod deflects with real valve springs and lift numbers. A rev kit helps you run a valve spring to close the valve and the rev kit keeps the heavy roller lifter against the cam. t/a you are about useless
05-10-2009, 02:55 PM
#12
Actually, that is PRIMARILY what I build, over 700hp LT1s... And no, no rev-kits in any of them...
And yes, Gizmo, they are a gimmick... Proper springs for the application is all the is required.
And yes, Gizmo, they are a gimmick... Proper springs for the application is all the is required.
05-10-2009, 03:55 PM
#14
So this "" 540 horse 383 you are building is short a few ponies then
05-10-2009, 04:13 PM
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Correct me if I am wrong, but I was under the impression that those rev kits were used to keep the lifter in it's bore in case of rocker arm or push rod failure, thus saving the engine block from losing oil pressure. I also thought that only people who road race their vehicles were the only ones using them, because of the demand of high RPM's.
05-10-2009, 05:03 PM
#17
Nope, purely a street motor... You are such a moron you think just because I posted about 1 of the builds I have going on it has anything to do with anything else??? Who is being dim and obtuse?
And, if your main purpose to put a rev kit on is to 'save' the bottom end in case of catasrophic valvetrain failure you should also have standoffs on the center oil drainbacks and screens in the drainback holes on the ends, THEN run a rev kit to ensure you still have oil pressure if you are so worried about loosing a lifter.
The immediate discussion went towards how it 'helps' run a certain rpm (thus the name a 'rev-kit'), and the fact of the matter, for running a certain rpm you *should* be doing it with the proper spring.
And, if your main purpose to put a rev kit on is to 'save' the bottom end in case of catasrophic valvetrain failure you should also have standoffs on the center oil drainbacks and screens in the drainback holes on the ends, THEN run a rev kit to ensure you still have oil pressure if you are so worried about loosing a lifter.
The immediate discussion went towards how it 'helps' run a certain rpm (thus the name a 'rev-kit'), and the fact of the matter, for running a certain rpm you *should* be doing it with the proper spring.
05-10-2009, 08:11 PM
#18
Correct me if I am wrong, but I was under the impression that those rev kits were used to keep the lifter in it's bore in case of rocker arm or push rod failure, thus saving the engine block from losing oil pressure. I also thought that only people who road race their vehicles were the only ones using them, because of the demand of high RPM's.
05-10-2009, 08:35 PM
#20
I think of the "rev-kit" as an insurance policy. They may save your motor from bigger damage. They may allow for longer use of your valve springs. Valve springs do weaken over time. They may also allow your motor to rev to higher rpm's.
I don't consider them a "gimmick". They do have their place. I have seen posts by well known engine builders who use them on the street. To each his own.
I don't consider them a "gimmick". They do have their place. I have seen posts by well known engine builders who use them on the street. To each his own.
