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Old 05-30-2010, 11:58 PM   #1 (permalink)
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24V pistons?

I'm currently having an engine being built by Tidewater Machine in the Virginia Beach area, and had a few questions I need some insight on...

I'm having a 98.5 24V being built (shooting for 700-800 HP range)...it'll have main studs, head studs, rod bolts, o ringed, cam, valve springs, pushrods, etc...

My question is what pistons to use?

The builder brought to my attention that the 24V can use a number of different pistons...VIN 6, VIN D, and marine pistons?

Others have told me though that there was no 24V marine engine built, so my question is can you even put marine pistons in a 24V?

I need some help!!
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Old 05-31-2010, 12:03 AM   #2 (permalink)
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Did you post this on CompD as well? I thought I saw something about this. As far as I know you can use the VP pistons as well as the CR pistons, but I don't know what the benefits would be of using one over the other, or if there are more apps out there. CompD will probably give you the best info.
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Old 05-31-2010, 12:17 AM   #3 (permalink)
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There is a difference between pistons with the SO and HO configurations. The HO pistons bumped the CR up to 17.1:1 over the SO's 16.3:1. The marine variants are a QSB engine over our ISB's. A lot of parts interchange though.

It sounds like you're planning on pulling a lot of power out of it. I suspect you'll be running a lot of boost. I'd stick with SO pistons for that reason. Unless money isn't an object, then you could look into some of the mahle exotic pistons.
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Old 05-31-2010, 12:31 AM   #4 (permalink)
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Mahle's would be an excellent choice, if money allows.
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Old 05-31-2010, 10:42 AM   #5 (permalink)
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ya I made a post on compD as well....just trying to get this figured out by tuesday.
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Old 05-31-2010, 10:44 AM   #6 (permalink)
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sounds like I'm going to either stick with the SO pistons or go with the marine pistons....

I don't see any where to buy marine injectors for a 24V though?
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Old 05-31-2010, 05:36 PM   #7 (permalink)
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Watch out for marine pistons, I know on the 12 valve they are different and are made to run with an injector with a different spray angle than standard and aftermarket injectors.
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Old 05-31-2010, 05:44 PM   #8 (permalink)
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If you're not gonna get Mahle I would just stick with SO. You won't see any real gain out of the others imo.
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Old 05-31-2010, 05:55 PM   #9 (permalink)
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I ordered my marine pistons from mumaudiesel.com.
Talk to them they will be able to help you.
I had to change my tips to 03 style.
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Old 05-31-2010, 07:36 PM   #10 (permalink)
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Is anyone running the marine pistons/marine injectors in a 98-02 24V?
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Old 05-31-2010, 09:03 PM   #11 (permalink)
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What does your builder suggest? Piston selection has alot of variables, and he needs to go over all that with you, or just trust him to do it for you. If its a daily driver, you may just want to stick with the SO VP piston.
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