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Pont · 06-25-2002, 04:43 PM

Dont' flame me, this is just my opinion and experience with engine building.

It won't matter if it's a 2 bolt or 4 bolt main block. A 2 bolt will hold 500hp with no problem at all. The only time I would concern myself with a 4 bolt is if you are going to run a blower with major stress on the bottom end or if you build something in excess of 700hp. I would be more concerned with balancing and blue printing. I wouldn't hesitate to build a 2 bolt main for any street application unless it was blown. If your gonna put 500 horses out of it, your gonna have some money in it anyway so I would grab a 2 bolt (easier to find) and have whoever does your machine work, drill and tap it for aftermarket 4bolt caps if you have to have a 4 bolt. Several companies make 4 bolt caps for this conversion and they are angle drilled for more strength than a stock 4 bolt. Personally, I think it's overkill.

Just my opinion.

06-25-2002, 04:43 PM	#4
Pont I need another Barley Pop Join Date: Feb 2001 Location: Grants Pass, OR Posts: 1,629	Dont' flame me, this is just my opinion and experience with engine building. It won't matter if it's a 2 bolt or 4 bolt main block. A 2 bolt will hold 500hp with no problem at all. The only time I would concern myself with a 4 bolt is if you are going to run a blower with major stress on the bottom end or if you build something in excess of 700hp. I would be more concerned with balancing and blue printing. I wouldn't hesitate to build a 2 bolt main for any street application unless it was blown. If your gonna put 500 horses out of it, your gonna have some money in it anyway so I would grab a 2 bolt (easier to find) and have whoever does your machine work, drill and tap it for aftermarket 4bolt caps if you have to have a 4 bolt. Several companies make 4 bolt caps for this conversion and they are angle drilled for more strength than a stock 4 bolt. Personally, I think it's overkill. Just my opinion. __________________ 67 Short Fleet 4x4 04 Honda CRF450R 89 Toyota 4-Runner 34 Ford 2 door sedan - Long term project ---------------------------------------------- There is a very fine line between "hobby" and "mental illness"