electrical1

Well As Most Of You Know I've Had All Kinds Of Motor Problems This Year, And Have Gotten Alot Of Differnet Advise, But With Know Clear Answers To Why They Keep Blowing. So Now I'm Taking No Chances, When I Install The Third Set Of New Gm 454's Ho Motors, Everything Is Getting Changed, That Doesn't Come With The Long Blocks. I've Ordered New High Performance Oil Coolers, New Oil Lines, New Water Pumps. The Only Thing I Haven't Ordered Yet Is New Distributors. What Brand And Model Does This Board Recommend To Get The Best Bang For The Buck. Looking For Speed And Performance With Little Room For Problems (that My Mechanic Might Screw Up).

MACDAD260

Check this out. This question has been asked before and always ends up here.

http://www.performancedistributors.com/marinedui.htm

I put one in my 502 this year and am very pleased with it. With no other changes I pickep up 1 MPH over the old Merc distributor that had a little play in the shaft. Good luck.

electrical1

Thanks Macdad I Purchased 2 Of There Distributors They Look Nice But I Have One Concern. If I Remember Right Every One Was Saying Set The Timing At 8 Degrees And The Total Advance Should Be At Around 30 To 32. If I'm Reading This Right They Have Set These For 22 Total Advance Why?
I'm Suppose To Be Running 454 Ho 420 Hp (if I Ever Get Someone To Warranty These). What Is The Timing Suppose To Be And The Total Advance Before I Blow Another Motor.

MACDAD260

Set them at 8* at idle and you will be at a safe starting point. My D.U.I. was supposed to be factory set at 24* advance but it is actually a little less. I have my initial timing set at 10* and at full advance the #1 cylinder is at 32* and the #6 cylinder is at 34*. I like to check the timing on both #1 and #6. They are 1 revolution of the crankshaft apart in the firing order so you can get a good average of all the cylinders by checking both and then set the total advance timing that you want on whichever one is higher. If I would have checked only the #1 cylinder and set the total timing to 34* the #6 would be at 36* which is on the edge of detonation unless you want to run 92 octane fuel. I have learned the hard way that trying to get the last horsepower out of an engine by advancing the timing to the limit is a good way to damage an engine. Besides, there is very little differnce in power between 32* total and 36* so why risk it. Good luck.

Airpacker

Don't worry too much about the base timing, just set it for 32 at 3000 or soo rpm and let the base lie where it is. The only time you would need to worry about it is if your were getting a hard crank/ kick back problem when starting.

Gary Anderson

electrical,
8 degrees of initial, plus 22 degrees of advance built into the distributor curve, equals 30 degrees total advance. The distributors are fine.
Gary

Gary Anderson

Wait, wait, wait, on second thought, both those DUIs are garbage, they wont work on your, or any other boat.
Just mail them both directly to me and I'll take care of their disposition!
Still love my DUIs, over 10 years without a problem. I just replaced another Tbolt module on a feinds boat yesterday.
Gary