This was posted in my last post but I don't think anyone saw it because it's getting to the bottom of the list were no one looks . Im still debating on which cam is better for an application over 400hp. Ive been reccomended the Crane 801 and the Edel Rpm. Anyone have any experiance with these? Is there a better one out there that Im not seeing? Facts......Opinions?

Thanks Guys

Just in case its a .030 390, Forged Flat Tops, Edel RPM heads, RPM intake, roller rockers, 750 Holley, 200hp Direct Port No2 and other lesser goodies.

 

ide use the crane 801 cam its better then the edelbrock RPM cam.

 

I’d pass on the RPM cam, it’s too radical and the LSA is too tight at 108 degrees.

Here’s some first-hand experience if you really want that bump stick (click on the "click here"):
http://www.fomoco.com/forumfe/reply....61&Reply=20361

 

The RPM can is very different than the 801 cam. It just isn't bigger. In some applications it works much better. In others it will not.

The 801 cam has a very wide LCA (114). This will decrease overlap and cylinder pressure. It will make the torque curve very wide so it works well with heavy low-stall (2,200rpm) vehicles. It will increase volumetric efficiency and gets decent mileage for its intended use. I got 12MPG with no special tweaking. It is also a dual pattern cam that works well with heads that need the extra crutch on the exhaust port. With stock C8 heads I think this is about the best grind out there for the street.

The RPM cam is has a much larger duration on the intake which matters most. It has a narrow LCA (108). The overlap is quite a bit bigger and the idle is rough but manageable. This cam works well with the edel heads just like edelbrock says but I don't think its the absolute best. There are several 12 second trucks running this cam with edel headed 428s. This cam is probably too big for stock heads without ny port work. Its operating range extends beyond the flow limits of stock heads.

I run the 801 cam with edel heads. It runs well but from what others have pulled at the dragstrip with the RPM cam I would have to say I am missing out on some good power.

My next camshaft will be a laser cams brand. It will be based on a 108LCA and have 285/290 adv duration, 235/240 .050 duration and about .590 lift. This cam is more agressive but not as big. The smaller advertised duration should preserve more cylinder pressure. I am really debating on whether to have them custom gring a cam with 290 degrees duration on both lobes as the edel heads don't need the crutch. I also plan on having my heads ported and then there will definitely be no need for the extra exhaust duration.

 

so it will be a 3200 lb vehicle with a 4speed, so basically either one could be right for me i would just have to try and see. I mean i like the lopey idle and all but id rather have my sheer performance than sound.

 

I ran into a guy at the dragstrip one night with a truck just like mine except he had 3.50 gears, stock low compression pistons and a 2,500 stall. His truck sounded awesome. He had the edel heads and intake. His idle seemed to be lopey but strong if that makes sense. He didn't seem to have problems keeping it running like the guy at fomoco. I ran a half second better than him but with stock pistons he should have been at about 7.2:1 compression or so. Power brakes or any other vacuum accessory would greatly suffer I am sure.

With that light of vehicle and a 4 speed the 801 woud be a bad choice in my opinion. If you want something a little friendlier I would look at another cam with a tighter lobe center (108 - 110) and a little more duration than the 801 has on the intake. Try to keep it single pattern or close to it.

I would like to hear more from RPM cam owners too. I have only seen 1 in action and I was pretty impressed.

 

Oh, nevermind.....

 

Well I think Im going ahead and get the RPM, Ive been looking around and cant seem to find anything else that suits me better, plus the RPM is cheaper than the 801 so this might work out after all. Good luck to me and thanks for all the input. Btw what do yall' think about roller lifters, ive never really messed with them.

 

I love roller cams but the price is what keeps them out of my FE for now. Roller cams have a very big advantange over flat tappet and its not friction. A roller cam can open and close the valves very fast. This makes the engine breath more efficiently and create more power with less duration on the cam.

 

I wil e-mail you some video of my 390 with the rpm cam.
Sean he is running Edel heads. Basicly the same setup as mine.
As far as having trouble keeping it running... I don't!
I have a stock C6 with a stock converter. No trouble with it on the street. never dies at stop signs or lights. Don't know why you would say that.

 

Well just out of curiosity i took a look at the crane hyd. roller, but geez the lifters are higher than the cam....wonder if there is any other type of roller lifter that will work with crane.

 

here is a link.
http://members.***.net/randy-barnett/videos/truck.WMV

 

Nice , sounds strong and like how it idle's

 

You can get a video from my webpage here also that shows how mine idles with the 801 cam. Not nearly as mean sounding as Randy's setup.