I would not run more than 30 degrees total. In a boat you need some safety margin. It might have been O.K. on the dyno at 35 but in the real world with heat and load 30 is much safer.

Does not take long to burn/melt a piston and on a boat with loud exhaust you never hear it til its to late.

Just for the record I run 6 psi intercooled boost that is way more efficient than that Weiand.I have over 150 hard hours at 30 degrees with no problems.

The drawback with the Weiand it generates heat as it "compresses/beats" the air.

I have one on my truck and when it is really hot out I can't get on it hard because of the heat is generates.

Set it at 30 and forget it.

Dave

Dennis Moore,
Great to see you on the board! Your knowledge will be a great asset.
Dan

26 CHECKMATE,
Sorry to step on your post.
Dan

I was advised by Dean Nickerson to run 29 degrees "locked in".
That means no advance, 29 at idle and at 3500 rpm.
My setup is a B&M 250 with Superchiller and single 1050 Dominator on a 496 (Gen IV).

Thanks for all of the advise I think I am going to talk to my engine builder about turning it back a little.

set timing at 30 and go like , well you know.

Thanks Candyman
I need ideas for FAMILY AND PERFORMANCE BOATING MAGAZINE
Got Any? (got milk?)
Dennis Moore

Hi Dennis,

I also have had your book from HP Books "BBC Marine Performance"---interesting/informative reading. Thanks for your contributions and welcome to the board.

I have an idea that you may be interested in for a topic in Family And Performance Boating magazine that you write for. On page 138 of your book "BBC Marine Performance", in the paragraph of "Aftermarket Roller Rocker Arms" you stated that;

...."Recently with the advent of more sophisticated test equipment, tests have shown that the roller tip also drags across the top of the stem. It doesn't roll across as originally thought."

Interestingly enough, Joe Schubeck has come out with a rocker arm that has a special radius tip made out of a low friction composite type of material that also "drags" across the top of the valve stem tip---only his is designed to operate this way. This special rocker arm design of his is WITHOUT ANY needle bearings in the trunion or roller tip. In other words there are NO MOVING PARTS in his newly invented rocker arm. It supposedly has little oiling channels within the rocker arm body that are supposed to provide better oiling of any of the aftermarket rocker arms on the market as well as being approximately 17 grams lighter on the tip (over the valve where it supposedly counts). I have spoken with Joe and told him that you had mentioned in your book about roller tip rocker arms have been shown to drag across the valve stem tip. This is something the Joe Schubeck preaches in marketing his product. He was excited to hear that someone else is finally saying the same thing. I told him your name and the name of your book. He also has some interesting lifter products with this same low friction material that would be interesting to dig into. He is very interested in getting his products into the Marine performance industry. His products are very thought provoking and the concept behind them is extremely interesting. I think it would be a great technical storey on your part---that is if you're interesting in investigating his products. Joe Schubeck is a gentleman and his shop is in Nevada and his number is 702-252-0677.

Thanks again,
Mark/KAAMA

Thanks Mark,
He sure seems to on the cutting edge of technology, especially with metalurgy and the like! I will introduce myself to him at the SEMA show and mention this E-Mail.
Sincerely
Dennis Moore

I am running a set of schubeck radius lifters in my 632 after a couple of roller lifter failures. There are no moving parts to break in this set-up and little if any power loss over solid roller lifters. The valve train is EASIER to turn over relative to the standard roller lifters as well. Joe is a class act who was very helpful to this sceptic. Generally speaking I gained 10hp down low and lost 10 up top due mainly to me taking .040" lift out of the cam. Look for these lifters in NHRA pro stock next year and I think we might just see this "technology" obsolete the solid roller lifters as we know today. I've heard from a comp rep they are hard at work on a "similar" lifter.

26 CHECKMATE,
I would go with the 30 that these guys with experience have told you about.. real world vs dyno..

Dennis Moore,
Welcome to the board!! There is a wealth of experience here.. Where else will guys (and some ladies)be willing to throw money at motors till they get it right!! I too have your book and enjoy it. I was trying to get a subscription to the Magazine, but have heard they dont always come through???

I am running a set of Joe Shubecks flat tappet lifters with "Glass slippers", as I call them. I opted for the larger Chrysler diameter, in order to gain back some of the power lost with a flat tappet lobe. So far no problems with the cam or lifters.
Now could you give me some insight to timing on my motor with a 1.88:1 rod ratio? I am currently running 32 degrees. Thanks..

26 CHECKMATE, sorry to step on your post, but I am interested in timing also..

Dick