Which roller cam for a 575sci rebuild?
 

Lost the head gasket in my 575sci between the cylinders. #4,6,and 8. Scuffed the wall a little on #6 cylinder. Stock head gasket showing signs of burn through on other head as well. 175 hours on engine. Currently running a whipple intercooler and small pulley. Planning on complete rebuild, keeping the stock heads and replacing the pistons with JE's, bumping the compression up to 8 to 1 from the stock 7.5 to 1. What roller cam would work well as an upgrade to the stock flat tappet. Current configuration should be in the 700-725 ish hp.

Re: Which roller cam for a 575sci rebuild?
 

I had my stock one sent to Comp Cam to get specs for same switchover. I have a part number, but not tested. Who knows? Who has had real experience? I need answers too.

Re: Which roller cam for a 575sci rebuild?
 

Richie Zul on Long Island does alot of rebuilds on the 575's.

Re: Which roller cam for a 575sci rebuild?
 

How do you get ahold of Richie, besides trying the phone book.

Re: Which roller cam for a 575sci rebuild?
 

Zul has a great rep but another thread a while back said they were rebuilding 575's retaining the flat tappet cam. I respect that and am sure they have their reasons. I thought surely someone here has put a bigger roller cam in a 575 and could give their experience on a cam profile as far as lift, duration and lobe separation. Not looking for trade secrets here to build my own engine but would like to be a little more knowledgeable before I ask my engine builder specifically what he's recommending for a cam and pistons. All I know so far is that they definitely recommended a roller over a flat tappet and 8-1 pistons.

Re: Which roller cam for a 575sci rebuild?
 

Contact RMBuilder here on the site.He is a cam master,he has helped me out and a bunch of others here.I am sure he will share he expertise and help you out.

Nordic95

Re: Which roller cam for a 575sci rebuild?
 

zahndok,
I've got essentially the same set up you. I am adding aluminum heads, roller cam, and 8.5 pistons (think I'll be OK with the cooler running aluminum heads and intercooler) this winter.
I too would like to hear from RMB on this subject. So Bob can you help us out??? PMs are OK by me if it's secret info!
Thanks,
Steve

Re: Which roller cam for a 575sci rebuild?
 

I believe it was Biggus. Do a search under his name.

BTW: Since these are injected a computer reprogram may be needed.

Re: Which roller cam for a 575sci rebuild?
 

I bet the new Merc 525 cam would be good in a supercharged application. It has the same specs as the old Crane 741 cam but with 114 lsa instead of 112.

Re: Which roller cam for a 575sci rebuild?
 

Joey Griffin rebuilt both of my 575SCi's. He did what you want to do, bumped up the compression a tad, and put in a bigger roller cam. Runs like a raped ape AND gets much better fuel milage. Here's his number 252-946-1883. Be forwarned, conversation is NOT his forte'.