stay away from any regrinds. Besides there are more things than lift and duration needed when designing a cam. Go buy some already made and be done.
Cam desgin is a science, the days of ******* regrinds are long past. What you will get is a Chevy master that is close.Kteller8 said:Ok, so i ve been asked to look into some cams for sr20 motors..
i have access to a very very well known company and they will regrind
a few sets for me.. how would you go bout setting up what duration and
lift? The company suggested some numbers, but how exactly would you go
bout getting that done? Does JWT list their cam specs? or anyone else?
thanks
Have the regrind company do something like a 270 degree duration and .500 lift on stock valve springs, its posible JWT does it.Storm88000 said:I posted this in the double thread:
"Why waste your time creating your own? JWT spent years researching, testing and developing different grinds, just buy some from them. S3 or S4 is a good choice."
Then he Kteller replied with all this garbage saying why do anything unique and who cares if they're already made. So then I posted this congratulating him on his ignorance:
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Did you get to dyno your cams yet?JRios said:That exactly what i wanted to do with my car. I have custom regrinds in my car right now. They're 270 x .403, the cam maker warned me about going any higher with the lift because there would be to much loss in base circle, so I settled with .403
http://web.utk.edu/~cjohns32/camlist.htmKteller8 said:Ok, so i ve been asked to look into some cams for sr20 motors..
i have access to a very very well known company and they will regrind
a few sets for me.. how would you go bout setting up what duration and
lift? The company suggested some numbers, but how exactly would you go
bout getting that done? Does JWT list their cam specs? or anyone else?
thanks
Please post your results when yo uget around to it.JRios said:Not yet, I plan to do it sometime in March or April.
Storm88000 said:I posted this in the double thread:
"Why waste your time creating your own? JWT spent years researching, testing and developing different grinds, just buy some from them. S3 or S4 is a good choice."
Then he Kteller replied with all this garbage saying why do anything unique and who cares if they're already made. So then I posted this congratulating him on his ignorance:
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choaderboy2 said:Have the regrind company do something like a 270 degree duration and .500 lift on stock valve springs, its posible JWT does it.
Please report your dyno results.
Its all good, maybe we can learn a few things from desire to be unique. Learning is what its all about.
As a warning, it might get expensive to try to improve.
Mike
metal spraying doesnt work too well, hard face welding is much better but its very expensive, like 60 bucks a lobe. Metal spray sometimes doenst attach well. Even hardface welding has porosity problems.T4 Primera said:Some regrinders maintain the base circle - how? - by metal spraying to build the cam up to the required amount of material. Why is it no-one mentions this when talking about regrinds?
I hightly advise against attempting to regrind but keep us posted.Kteller8 said:Well I have access to a few sets of cams just sitting here, that have come through the yards..
because of who i know, i can get them regrinded by a good facility pretty cheap:
only problem is the availabity of a dyno![]()
I realise that generally the rebuilt lobes aren't in the same league as a new blank, although as with all things advances in the technology are made from time to time.choaderboy2 said:metal spraying doesnt work too well, hard face welding is much better but its very expensive, like 60 bucks a lobe. Metal spray sometimes doenst attach well. Even hardface welding has porosity problems.
Mike
There is way,way more to designing a cam by just specing lift and duration.Kteller8 said:exactly.. i know that they wont be the same as new blanks.. thats just common sense.. also why the new cams are priced a lot higher.. when talking with a company in asia bout setting up new blanks.. they run a crazy price..
but i dont see why regrinds wouldnt work just for a temp time frame or just to add a little extra to the setup? if i was going all out 900hp etc.. no regrind isnt what id do.
I was just saying the same thing to someone in NZ who wanted to grind a cam to JWT specs - that the specs alone would not give him the profiles needed to prevent spring surge.choaderboy2 said:There is way,way more to designing a cam by just specing lift and duration.
Mike