Youre not going to be able to spin the stock parts to 9000...and for the ppl that say theyve spun there engine to 7000...thats 2000 more rpms. There is a huge difference when it comes down to it. Think of the piston speed differences... I dont see it happening. I also dont see any set of heads or valvetrain that youre going to be able to cheaply do...
Think about how much SAM has in there motor turning 9500...
3000 crank, 1500-2000 rods, 1900 pistons, 1100 ringpack enormous amount of work to get the heads to flow that number...it adds up very quickly. And youre going to do it on a stock(cheap) rotating assembly.
What Judson will say all the time, if you dont have the money to do it the right way, park the car until you do...
and my rant is over, good luck

 

Unfortunately there a lot of doubters and people don't like change. It will either pan out or it wont. Simple as that. I'm all about trying something different. And am hoping we as a whole can find the true limits of these stock short blocks.

 

I'm aware of the piston rod balancing which I stated previously. He is telling him to goy buy different sets of rods and find the lightest one..... Seems silly to me. I understand the point of the knife edging but, As for knife edging I don't think there would be enough weight left on the counter balances to keep up with a heavy "stock" piston and rod. I.E slowing down the rotating assy. Also, the Windage tray does a good job preventing the Windage. The only point to doing the knife edge would be for the lighter rotating mass which IMHO would require lighter pistons and rods.

 

in my case im not trying to hit 9,000 but i want a quick reving 4 inch bore and see how far I can push stock parts total investment in whole truck less then $2000 including the t56, ly6, 4.8 and the blazer. if it goes it goes just hope its a quick clean up with accidents involved

 

The old copo 302 had nothing but a forged crank and 40 year old technology. It spun past 9000 many a time. There's a YouTube video of one hitting 10k! But he balanced and blueprinted the motor.

For every .125" increase in stroke you quadruple the forces on the crank. 433ci is a TON bigger than 328 which would be a 4.8 crank in a 6.0 block. I can't remember exactly but rpm is an exponential force based on weight, forces, and diameter. Manufacturers want to error on the side of caution as warranty repairs often outweigh engineering costs.

This is how guys spin 7-8,000 on stock rotating assemblies. I'm looking at destroking and turning an additional 1000 rpm which if I recall will double the force exerted on the crankshaft. I'll don't know the specs on that 433 that Sam built but .25 less stroke and 500 less rpm is approximately 1/4-1/6 the force exerted on the crank.

 

Whenever you get this "cheap" high spinning engine together, you should put a go pro in the engine bay before you take it out and try to spin it that high. Just in case ya know...Good luck tho by the way, im sure it will turn out just fantastic

 

The PCM reads only 8000 .. Everything else, and I do not know
Have you spoken with the engine manufacturers? Maybe they have tried and it did not work that great .. Perhaps a good starting point to save you money and headaches.

 

Any possible issues with spinning the trans up to 9000 rpm? I assume with more prolonged operation at 9k there would be issues with over spinning the pump and maybe balance issues.

 

Anyone can google and see a copo 302 spin to 9k but those motors were and still aren't cheap. At that speed weird stuff does happen. The transmission won't shift if it isn't "built", belts leave, water pumps stop. But guys have turned much faster and lived to tell about it.

 

I just want to know any tricks.