.937 lifters?

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11-30-2014, 05:34 PM

#41

Black Baja

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Quote:

Originally Posted by GPM

I know, you might want to look at some symetricals, the engine would run a little smoother accross the cylinders and make big HP.

I don't want the valve train issues that come with spread port stuff on a boat motor.

11-30-2014, 05:46 PM

#42

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Originally Posted by 14 apache

Your talking big chiefs? That's what I bought for my engines sweet 16* brodix cost me arm and a leg. flw 515cfm at .900 will se what they make in spring hoping 1075hp on 100LL aviation gas 12to1 CR.

I hate to have your gas bill. Are you going with the Jesel lifters?

11-30-2014, 05:52 PM

#43

GPM

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Quote:

Originally Posted by 14 apache

Your talking big chiefs? That's what I bought for my engines sweet 16* brodix cost me arm and a leg. flw 515cfm at .900 will se what they make in spring hoping 1075hp on 100LL aviation gas 12to1 CR.

Big Chief, Big Duke, either one, usually within 3 cfm per runner instead of 20 to 40, you don't need quite as big of a cam and the shaft rockers seem to work pretty well. You can always run E85 like we do.

11-30-2014, 06:01 PM

#44

GPM

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I ran the Brodix baby ones, the runners were 388 cc after the CNC porting, they only flowed 455cfm at .700.

11-30-2014, 06:03 PM

#45

14 apache

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Quote:

Originally Posted by Black Baja

I hate to have your gas bill. Are you going with the Jesel lifters?

Yes think jesel. Was going to try CAM-FX but not sure if I want to be the genie pig.
The one guy does endurance racing with his apache oversees and the rockers on his big chiefs work. 200mi races.

11-30-2014, 06:06 PM

#46

14 apache

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Quote:

Originally Posted by GPM

How do the valve seats hold up on the exhaust with E85?

Quote:

Originally Posted by GPM

I ran the Brodix baby ones, the runners were 388 cc after the CNC porting, they only flowed 455cfm at .700.

What kinda power they make? Rpm? How many inches?

11-30-2014, 06:10 PM

#47

14 apache

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Just looked it up 100LL is about 6.20 Gallon with lead valves are happy.

11-30-2014, 06:18 PM

#48

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I ran the Big Dukes on a Procharged 598 with a solid roller, they seemed to run pretty good. Used to turn it up to 7500rpm at the lake shootouts. I sold the boat about a year ago. We've been running the E85 in my brothers boat for the last 3 years without a problem.