I've been kicking around the idea of building a high revving budget build. Oxymoron I know

Here's my idea
6.0 block
4.8 crank
Arp bolts
Regular gasket set
Cam
Valve springs
Intake

Is a longer rod like the 4.8 necessarily better than the 6.0 rod?

Are shaft mount rockers necessary?

I'm expecting 15,000-25,000 miles out of this motor. I'd like to see it with a turbo.

What're your guys opinions and ideas?

 

I can't offer any advice, but would like to see a video of a 9K rpm LS series...

 

You will need to upgrade to Big Stuff 3 or mega squirt, the stock PCM for the Gen III motors can only goto 8k, bad stuff happens above that.

 

What's the application?

 

3000 lb highway monster/Texas mile competitor

What's the ECM do above 8,000?
Are the injectors going to flip at that speed?

 

The PCM only reads to 8000.. anything above that and i dont wanna know
Have you talked to any engine builders? Maybe they have tried it and it didnt work so great.. might be a good starting point to save yourself a headache and money.

Good luck!!

 

I have
They suggested 305 or 283 crank with oversized bearings in a bored 400 block. They've clocked 10-11,000 rpm. I'm relatively tame compared to that.

So carb and msd.
Anything else you guys can think of right off the bat?

Shaft mount rocker arms necessary?
Longer rods better?

 

305 283 crank?
Did you tell them your working with a LS engine?

 

"oem rotating assembly" That is like coming swinging out of the gates. I feel sorry for the stock rods going in that motor. This should be interesting....

 

I asked around and haven't encountered anyone destroking the gen III yet.

I did find guys up by the iowa border running bored 454 blocks with custom cranks around 400 ci in their mud racers. I bought tires off a guy that showed me first hand what 11,000 rpm sounds like from a 397? Or so ci big block he had built. If I wasn't an idiot and it wasn't snowing at night I would have one bad *** video.

That guy is who convinced me to sell my 426 small block chevy and consider a destroked motor.