I'm thinking about this roller cam and wondering if any of you have had any experience with it. It doesn't have a high lift so my vortec heads will appreciate that and it's supposed to have good torque and responsive...
XR270HR 218/224 .495/.502
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pontiacgp said:
Are you doing any spring changes? I ran a. 480x2 everything cleared, but some sites say that's too much. That sounds like the perfect vortec cam considering they stop flowing at .500 lift without porting. Also the split lift will help with the smaller exhaust flow in the head.
I guess the problem is the spring retainer bottoms out after .480 so you got to grind the valve seats down and get taller springs, get the beehive spring setup, or do the ghetto grind. And this doesent go into whether or not the pressed in studs will handle.
Sorry I don't have any experence with that cam and I don't mean to hijack but this is good info to someone researching a vortec head build.
Thanks and I know about the springs that'll have to be changed. I have read that .480 is the max you can run with the springs so you were just on the border line. Mine are stock so an upgrade will be good. What cam were you running?
pontiacgp said:
I ran an elgin. 480 .480 cam I forgot the duration but something tells me 920p was the part number. I used the old pushrods and threw a set of scorpion 1.5 roller rockers. With the airgap (knockoff) intake and a 650 dp and a 150 shot of spray. Cobra mustangs didn't know what was up.lol
Anyways the heads were junkyard fresh cleaned up with a coat of paint. Everything was stock on the heads. I ran it for about 3 months beforea 434 stroker was built.
You still got that link for the beehive springs? I can send it again if you don't. What are the other specs of the engine, compression, intake, etc? That does sound like a good cam shaft for a vortec headed engine. If you go for it I would like to see some dyno action. 
yes I still have that link and thanks again for it...I will be sticking it on a dyno this year just to see what it does. Last time I was at my friend's speed shop where they have a dyno they had a prius on it. He said that's so I'll be able to beat at least one car.. 😳
That's the exact cam I just put into an engine I'm building. The heads are getting a bit of a workout to fit some manley springs we use on superstock engines and screw in studs without guide plates (guided rockers). Single spring 300lb at .500 lift or so. I'll have the engine built soon and be up on the dyno before it gets installed. We could compare dyno sheets when they're done. Compare driveablility too when they're on the road. Good luck!
thanks but that deal when south, it seems some people place adds on the interenet but don't want to bother to ship it... 
I have a line on a ZZ4 cam now..
I have a line on a ZZ4 cam now..
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