Offshoreonly.com - Need to know the diff/??

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Offshoreonly.com (https://www.offshoreonly.com/forums/)

- General Q & A (https://www.offshoreonly.com/forums/general-q-20/)

- - Need to know the diff/?? (https://www.offshoreonly.com/forums/general-q/242687-need-know-diff.html)

ridefast77

11-18-2010 12:29 PM

Quote:

Originally Posted by Griff (Post 3255939)

If you use the 525EFI heads, then you will have to use 525EFI exhaust. They are a modified Edelbrock head with a different exhaust bolt mount pattern.

i have some merlin world product heads im going to use.

jeffswav

11-18-2010 01:31 PM

Quote:

Originally Posted by Young Performance (Post 3255914)

Not to be picky:drink:, but a tall deck (10.2") can accept up to a 4.750" stroke. I don't like going over 4.5" stroke since you end up with a very short rod and steep rod angle.
The Gen VI 502 has a stock bore of 4.468"
Eddie

Wow, I did not know you could use a 4.75" stroke. On a tall deck, when you use a 4.5" stroke do you use the offset pistons with standard rod length? Just curious..

Young Performance

11-18-2010 08:59 PM

With a 4.5" stroke, you can either use a 6.7 rod and a 1.25 compression height piston or you can use a 6.635 rod and a 1.27 piston. If you use a 4.625 or 4.75 stroke crank, you have to use a 6.535 rod.
You can get pistons with just about any comp. height that you can dream of.
Eddie

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