HP and RPM ratings

What is the HP and RPM ratings on a scat 4340 crank and the scat 4340 h-beam rods with arp2000 bolts?

Id venture a guess mine is just shy of 1000hp n/a, then stick a small shot of mr frosty on top.............its been 7700.

Pretty tough combo, there is more to it that just crank/rods and bolts though.............

Yea I know there is more to it. I was curious what the company rates them. If my A headed motor is making 900 hp then put a big shot plate on top for a 400 worth extra, but only spining at 7500 or 8000 max rpms. I took my SCJ bottom end all the way down and cleaned it and noticed I had a little cap walk going on. 7000 rpms or less and 32degrees of timing is what it stayed at. I know there will be a point that the forged stuff will max out. Just thinking after looking my 2bolt block over.

I hope your not considering running a factory block with your hp goals...........

richter69 wrote:I hope your not considering running a factory block with your hp goals...........

X2 sound like that going to be the weak link Lerry T had to start all over from block falure.

Whats the old saying... "Some people can break a canno ball in a sandbox"

Cap walk on a stock block is not the end of the world as long as its "under control", they will last a long time moving around, but you have to understand it will not last forever and becomes a consumable. But you definetly are asking a little bit much for a stock block with 2 bolt caps at 1000hp.

You could alsways 4 bolt the stock block for SOME added strength. I agree cap walk isnt always the end of the world, just letting you know your walking the line.

How about a girdle.

IcallhimGeorge wrote:How about a girdle.

You a funny man

IcallhimGeorge wrote:How about a girdle.

Never seen one..... Tell us all about them....

dfree383 wrote:
Never seen one..... Tell us all about them....

You seem to know quite a bit about man girdles.

I'll take that as payback for the "Pink Block" Comments.....

dfree383 wrote:Whats the old saying... "Some people can break a canno ball in a sandbox"

Ahhhh yes, Chuck Steven's signature line. In full it read, "Some people can break a cannon ball, in a sand box, with their bare hands."

Loosely translated, it actually means, "there are a lot of infintile, wannabe, freshman engine builders that are so blind and inept that they will grenade the strongest, highest quality engine parts to smithereens because they haven't a clue what they are really doing."



Paul

69F100 wrote:X2 sound like that going to be the weak link Lerry T had to start all over from block falure.

Some people may claim the chicken-or-egg scenario in that engine catastrophe, but I maintain that the OEM block failure noted in the above quote was not the block's fault. I was so digusted with the "half-story" reality of that thread that I stopped reading it, so I can't say for certain whether or not the entire story was ever fully disclosed, including parts being put into the engine backwards and which could directly stress the block as a result...don't blame the block for that.

Not saying there aren't stronger blocks out there; there are. And certainly, the more that an OEM block is pushed the more the risk percentage increases. Just be sure to use actual documented examples where it was truly the block's fault, and without a doubt.

If we all refer to the Chuck Steven's quote in my post directly above this one, then we can consider yet another altogether different reason why some OEM blocks live and others don't.

Paul

No I have a A460 block, [thanks Lem], I am putting money in this new motor but I don't want any mabe or if thoughts. I did find out I would be better running oliver rods to the power level and RPM's I mention.

they are better, but the Scat stuff is good to the 1000hp level too, been done many times. It all depends on your budget.

If I wasn't gonna run nitrous I would keep the scat rods. It will be a while till I am finished but it will be worth the wait.

The h beam rods might be tougher than you think, but I agree the Oliver might be better............

It's just more of hearing the h-beams getting a little egg shaped vs the olivers.

Horsepower really isn't the problem if you keep it all out of detonation ... reciprocating weight and piston speed are the major factors in connecting rod durability.

Like Lem says "The Scat stuff is better than it should be"