AHall
Hobbyist
- Joined
- Apr 2, 2007
- Messages
- 4,603
How much are you destroking 5.9's for the high rpm lightweight theory?
No one knows?
How much are you destroking 5.9's for the high rpm lightweight theory?
No one knows?
my head hurts....
That is what it takes to push the limit. Just got funding to do billet heads they will be built on BBC bore spacing 4.840, so with big heads a short stroke 500 cid Dmax with 400+ CFM air flow is possible.
Chuck wants to go ahead and do this on 5.00 bore spacing, so we could see motors as big as 600 cid.
There are now 3 blocks on order now, and the cranks are in the works. We are now calling this the DDRE “diesel Drag Race Engine “ motor.
We are going a 70 mm cam as well at zero additional cost for either cam of block.
How the hell can this be called a duramax with new head, new crank, new block, new rods, new pistons, etc. The only thing it may have in common is the electronics to run it. Its not even based on the Dmax anymore, just a diesel made with chevy components.
that puts my dragster down to 1550 with a 200 lbs driver, and with Jordan its down to 1450
...that puts my dragster down to 1550 with a 200 lbs driver, and with Jordan its down to 1450
And to compete for horsepower with our lowly super street truck, with heavy steel rods, and lead balloon pistons, it will need to make some 250mph passes...
It’s too bad that it doesn’t work that way, when you try to accelerate one of those motors at 600 rpms per second, they lose 40% or better of their hp. Just like when someone complains the dyno will not load their motor.
All of the weight reduction is what is necessary to make the motor REV-GAIN. It’s the same on any motor. Pro Stock run their motors at 1200 rpms per second.
it loses 40% power when you take a heavy motor and try and make it acc at 600 rpm's per second. we lighen up the motor to gain that back .
why? please explain.
Because Heavier rotating assemblies absorb more energy to accelerate. Not sure how accurate 40% is, but you can bet it soaks up some. I could see this being a bigger problem in a lightweight vehicle, and not so much in our trucks.