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-   -   Upgrades to stock 350 sbc (https://www.offshoreonly.com/forums/general-q/320170-upgrades-stock-350-sbc.html)

DjMikeyC 11-16-2014 05:19 PM


Originally Posted by SB (Post 4220252)
RyanOOTJ - provided spot on info. My answer is the exact same as is.

Pssst: I can't believe the 24 Pantera didn't have planing issues with that prop.

That prop was on it when I bought the boat this summer. She gets on plane with ease, even with a full tank and 4 persons aboard, and I never use the tabs.

You guys really think I can get away with the 64 cc chamber heads and still run 87 octane? I will be using the stock bottom end and I have not opened it up yet to see whats in there so I have no idea what pistons are in there. I know they say you can run higher comp and avoid detonation with the aluminum heads but I don't want to have to worry. Most marinas on my lake are 87.

Ryan00TJ 11-16-2014 06:22 PM


Originally Posted by DjMikeyC (Post 4220287)
That prop was on it when I bought the boat this summer. She gets on plane with ease, even with a full tank and 4 persons aboard, and I never use the tabs.

You guys really think I can get away with the 64 cc chamber heads and still run 87 octane? I will be using the stock bottom end and I have not opened it up yet to see whats in there so I have no idea what pistons are in there. I know they say you can run higher comp and avoid detonation with the aluminum heads but I don't want to have to worry. Most marinas on my lake are 87.

With aluminum heads, dialed in quench, CORRECT carb jetting, proper heat range plug, timing, proper oil and water temps, it is no problem. My last alum head 383 was 10.18-1 static and ran all day on 87.

SB 11-16-2014 06:30 PM

I run 87. Stock 91 5.7 shortblock..no machine work....Brodix 64cc heads, 218/224 .570" HR. I can tune pretty good...I think anyway. LOL.

I'm pretty hard on the throttle.

Jonesyfxr 11-16-2014 07:19 PM

If the OP runs iron heads and over 10-1 ish compression 87 octane may be an issue. If he runs aluminum there won't be an issue.

I consider myself lucky because we have 91 octane ethanol free available at the pumps.

SB 11-16-2014 07:31 PM


Originally Posted by Jonesyfxr (Post 4220368)
I consider myself lucky because we have 91 octane ethanol free available at the pumps.

Jealous. LOL.

http://25.media.tumblr.com/tumblr_m8...hg9bo1_500.gif

So2fast5u 11-16-2014 09:17 PM


Originally Posted by DjMikeyC (Post 4220287)
That prop was on it when I bought the boat this summer. She gets on plane with ease, even with a full tank and 4 persons aboard, and I never use the tabs.

You guys really think I can get away with the 64 cc chamber heads and still run 87 octane? I will be using the stock bottom end and I have not opened it up yet to see whats in there so I have no idea what pistons are in there. I know they say you can run higher comp and avoid detonation with the aluminum heads but I don't want to have to worry. Most marinas on my lake are 87.

If it was in a car I would say sure but in a boat that gets run hard it would scare me but it seems people are doing it and not having problems. I have 11 to 1 and run 93 in mine and have no problems....YET!!!

Jonesyfxr 11-17-2014 06:05 PM


Originally Posted by sb (Post 4220380)

^^^lmao!!!^^^

dereknkathy 11-18-2014 05:33 AM

alum heads and alum center dump GLM exhausts. they are good for about 350 to 375 hp. enough for all but the really exotic small blocks. also taking 150 lbs outta the back of the boat. then you can carry 1 more size 7 girl, or skank as they seem to be called on this forum...

DjMikeyC 11-18-2014 01:36 PM

This might sound like a wierd question but anyone see any possible problems losing too much weight off the back of the boat by going with Aluminum intake, aluminum heads, and aluminum manifolds (GLM's) or headers?

SB 11-18-2014 02:01 PM

Not usually. If I could lose more weight off the back of mine I'd be psyched. In reality my gas tank needs to be a little more forward.

My Eddie Exhaust was 88lbs lighter than the factory system it replaced. That, of course, was a much bigger weight reduction than the aluminum heads, which i did too.

Placing my batteries a few feet forward of where they where helped tremendously. Again, my little boat doesn't like weight in the rear at all...and yet again, I believe the tank should have been moved more forward. Oh well.

Edit in: My boat will lose 2-3mph (min) for having a passenger.


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