What is the max horsepower on a 454 2 bolt main can handle with forge internals?

Question:
400hp 500hp 600 hp ?
using N2O too !

Answers:

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i own a shop ,and i have one built up with around 425 horse power and it has held up real good now for about 3 years,and has given no problems at all,so i know it will handle that much,and id say more ,but i can assure you it will hold at 425,because i run mine real hard all the time,and it wont blow,good luck i hope this helps.

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the answer revolves more-so around how much compression and livable rpm range. This block can realistically produce 500+hp w/ right combination of heads, cam & intake.(headers of coarse), staying below 11:1 comp. (I suggest10.25 max, so as to run on pump gas) carefully chosen roller cam,( prefer solid myself) & 6000 rpm ceiling. A good ignition system is also a must.parts chosen to work in harmony, and proper assembly procedures will yield a torque monster w/manners that will live for many years. I have built more like this than any, with long lives and happy customers. Good luck. ...dwr...Ironhandc... Inc. It should also be noted that the 2 bolt block has thicker main journal webs than the 4bolt, & many builder will choose to start w/ this block and drill & tap block to accept 4 bolt splayed main journal caps, resulting in a more stable crank bed than a stock 4 bolt block .It is entirely possible to achieve 500+hp w/o nitrous (naturally aspirated) w/aforementioned method, ex. 70's Chev LS6 underrated @ 450hp & LS7 not rated, w/70'stechnology.Modern cam technology & head choices make this goal easily attainable

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I own a shop, and build a lot of race engines. Wow! this is a tough question, and the only real answer is; you never know until it blows up. What the engine will produce is in direct relation to how much nitrous are you going to stick to it? 500 horses is your max, and that is with the bottle. If you installed a rotating assembly (that has been balanced as an assembly) along with the flywheel & balancer, then you may go as high as 550 give or take. A lot of people think the 2 bolt main engines won't hold up, but I know better, and anybody that builds big power engines will tell you, the 2 bolt main is almost as good as the four bolt main. Usually what breaks in an engine is one that wasn't balanced as it should have been, and they break/bend a rod, and the mains are still intact. I have seen cases where the four bolt main broke the block, because the block was weekend from the extra hole in an area that didn't have much meat to begin with. As an example, take a long hard look at the small block 400 with 2 bolt mains. I see them all the time at the drag strip pushing 550 - 575 horses (bottle fed), and they stay together. My friend is running a 2 bolt main on his rail, and has been doing it for about 2 years now without any problems. What you better watch is not getting the compression to high for the nos, as this and too much ignition timing will kill the best of them. Take your time, and dial it in right, and above all use a balanced rotating assembly. Do your nos in 50 horse increments, and don't try to get it any more than 550-575. With the forged assembly, it will take more abuse than the cast, as the flex shouldn't be a problem, but sticking too much juice to it can be.
Glad to help out, Good Luck!
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