What is your opinion on this regrind

[blackbombshell95]

I was reading the specs on cranecams.com on the crane 272 that you recommeneded. And the specs were with the 1.5 rockers. Well i already ordered 25759-12 1.6 gold series rockers from cranecams.com Am I going to have too much lift? I have no clue what i'm talking about. lol. sort of.

I haven't taken engine performance/rebuild yet at my college. I just finished electrical lol.

[bszopi]

The 272 WILL NOT work in your engine. You really need to learn how to do more research before you start buying stuff... BTY got confused as to what engine you have. Not sure how he did, and not sure why he even recommended that cam, but it will not work with your engine. The 272 is a non-roller cam. You need a roller cam. From experience, look to spend $800-$1000 for a custom cam from Crane. The only thing available currently for the 3x00 is a regrind, a cam core from Cam Motion which would need to then be ground (what Curtis was referring to), or Milzy's cam (which is a Cam Motion cam which has just been ground to his specs). That is it. Don't even look at any other cam companies for actual cams cause no one has one. You can look to compare specs, but unless you know what you are looking at (which you have proved several times in this thread that you don't), its all a moot point. Either talk to your machinist and have him explain the cost behind his custom cam from Crane, or have him spec out a cam for you, or call a big time cam company who's business it is to help people choose a cam profile.

[Guest]

Bszopi, the 272 can work in a genIII block, you jast have to use the lifters that come with the 272 and a genI/II timing set.

Personally I'd stick with a genIII (roller) cam, over a flat tappet cam, for daily driving anyway. If it was for some serious output then I would consider the flat tappet cam, or better yet a roller cam from Schnieders cams.

[blackbombshell95]

I didn't buy the CAM YET. Once again thanks brad for pointing out that i have no clue what i'm doing. Sometimes i just need some sense smacked into me.

Either talk to your machinist and have him explain the cost behind his custom cam from Crane, or have him spec out a cam for you, or call a big time cam company who's business it is to help people choose a cam profile

This is what I plan to do thanks.

You can look to compare specs, but unless you know what you are looking at (which you have proved several times in this thread that you don't), its all a moot point.

What kind of guidance can you give me in this area. All that I can think of is that I want more power. Obviously. I would like to have an idea of what i am looking for before my motor goes into the shop.

Thanks.

[blackbombshell95]

I really need to learn the difference between a flat tappet and a roller cam.. Am I guessing GenIII's(most or all are rollers)? and gen I & II are flat tappet?

[geoffinbc]

Yea sorry. When you said you were just goin to goto Crane and get a regrind I asumed this was for a simple flat tapet cam and suggested you get a 272 cam instead of spending cash on a regrind.

DON'T do this. Even a stock roller cam would pretty much kill a 272 flat tappet cam... Get a propper roller regrind to a spec that will suit your needs. You can use the Crane 272 cam or 260 cam spec as a starting point for your regrind and go from there.

[blackbombshell95]

Visually how can you tell the difference between the two cams? tappet and roller. on the crane website it says the crane 272 IIRC works for a 85-96 or sumthin.

[geoffinbc]

Yea its good to 95 because thats how long the iron head motors lasted and they had flat tappet cams.

The difference between a flat tappet cam and a roller cam is very aparent

Roller cams with have a more arched top to the lobes versus a flat tappet cam which will be more pointy.

The biggest give away however is the way the lobe looks in colour and finish. A roller cam will alway have a high polish finish just like the bearing surface on the cam. The lobes of a flat tappet cam actually feel quite rough when you first get it and the hard face of the lifter anong with some break in lube actually polish the lobe where the lifter rides.

If there are no pics readily avalible I got some cams here I can take some high res pics of and put them in the gallery.

[matt_p]

from curtis

[TurboZ24]

Yep, was going too mention that. Right is a mechanical flat tappet and left is a mechanical roller. The material is also different. Roller cams (aftermarket at least) are billet steel, which flat tappet cams are ductile iron.