Thread: Should I usw this cams in my sr20de ?

Right lad - these are my old cams.. must confirm they are in VERY VERY good condition - if its possible to repair the cam, I would get it done because the cams themselves have probably only covered 5000 miles.
Such a shame they were damaged in postage, as they were posted to me fine, I posted them to Ross (almeraraje who you bought off) with no issues.. but then he sold them so someone else and they were damaged in postage
Joe

Hey Joe,
I called a lot of factories who are specialised on cams and al of the said if there is a broken part its not possible or recommendable to repair them, but this is the only picture I have so maybe its different when I have them here

But otherwise its good that just the outlet cam is broken, with just the inlet cam it still should be a performance upgrade

Do not put that cam in your motor.

Do not fix cam and put in your motor.

In my opinion if the crack does not extend down into the cam very far where the bolt goes into it (or nearby) then it should be okay.

If a reputable machine shop weld it back up and finish it down you should be good to go, but it depends how deep that crack goes into the cam. That part of the cam only locates the cam gear, but the bolt inside the shaft is what actually holds it together. We've run many engines locally with no dowel pins in them whatsoever with no problem. (If the sprocket bolt gets loose, do you really think the dowel pin is going to hold everything together??)

I will say it again. Do not use that cam.

These cams are made out of a porous metal, it think its called pot metal. Once there is a crack vibration will start it to crank again.

thats exactly the point, no machine does it or either say it's even possible!



Thats the reason, it's nearly impossible to weld it correct.

Andreas thx youre answerin ^^
do you get my PM ?
Do you have an idea how much the performance increase would be with only the JWT inlet cam and stock outlet cam?

You can always buy the NISMO half processed cams and have one of the factories make them into your specs.

NISMO SR Engine Parts - Half-Processed Camshaft Intake

http://www.rhdjapan.com/nismo-sr-engine-parts-half-processed-camshaft-exhaust-55739

If you put that cam in your motor kiss your engine good bye... period...... after that I'll find out where you live just so I can smack you behind your F^$king head for even thinking of using that cracked cam.....

Yes the material is porous andreas but it not pot metal, that is something totally different. Its chilled cast iron. I believe JWT used nissan blanks and in that case it would be chilled cast iron. Other than that it would be billet steel and its definitely not billet steel based on the pics and based on my own set of JWT S3R's.

ali86 have any of these shops actually seen the cam or the damage? it seems to me they think the cam is snapped in half or something like that.

repair to that material is possible if welded with the correct nickel rod, if you use anything else it can be welded but not machined. With the correct treatment of preheating and welding technique and cooldown there will be no warpage to the cam or stress points.

looks like the cam was dropped on the dowell pin end and this caused the pin to push out the bit at the back, pressure(trapped) or side force may have caused the crack along the side but all in all, if you put a new dowell hole at 180 to the original and do nothing else I cannot see that cam failing.

Wasn't it Charles Dundon that was having VE cams welded and reground? Have any of those cams warped or failed? It is the same material.

@gkottis Thx for the links

@topdog781 man chill, whats your problem? If I know this all before, do you think i would post this Thread. You should be thankfull.Now when other newbies there is my Thread where they find, In my opinion good information.

@yoshoto exactly, non of the machine shops already saw it. i had only this pic here. But as I can see, there was a part broken. It happened @ delivery. So after a time, and abaout two more deliveries, because rhe owners sold the cams, around the broken part begin to grew up some cracks and as I know thats reason why its makes it more difficult. All the machine shops are asking 1. For any cracks.
Well the way of preheating and welding is correct, but no machine shop seems to take respnsibility for it. What I can understand.

So there is the possibiliy of buying a new.cam from JWT
Regrind my original outle.cam to max, so it should be better than the original one, but an engine builder saud this way is not good.
Or buying such a Nismo cam but I think it will be not cheap at al

I will post more pics when the cames have arrived,
And sry for ma bad english,
Wh have here nearly 7 am