*BILLET* aluminum rods

AHall said:
No one knows?
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I have gone as short as 4.0 inch on the D/DT motor, and it didn't lose any power, just moved it up 600 rpms. I would go a 4.5 inch stroke on a 2.6 with a Hemi rod. I am working on my crank for my DDRE program. If I go with a 3.75 stroke it will be a 427 but we are thinking about going to a 4.0 and making the new motor 454. With a Sonny Bryant crank it comes out of the box balanced id you give then a bob.
The problem is that if the head doesn’t flow the air to feed the motor why make it bigger?
 
Lance@Alligator said:
my head hurts....
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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.
 
if i was looking for rods i would try some AL rods just to be a guinea pig...i'll stick to my 12V rods for now, maybe next engine lol
 
COMP461 said:
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.
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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.
 
Tate said:
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.
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I bet you don't find any stock parts on a Pro Stock either.

this is where it's going , light weight , I got the weight on the new block, 141 lbs that is 165 lbs ligher then a stock block, and the crank is 35 lighter as well .

that puts my dragster down to 1550 with a 200 lbs driver, and with Jordan its down to 1450
 
shooting for Indy in 4 weeks, can't wait , a quarter of a million people in 7 days of racing.
 
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COMP461 said:
...that puts my dragster down to 1550 with a 200 lbs driver, and with Jordan its down to 1450
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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...
 
dvst8r said:
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...
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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.
 
COMP461 said:
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.
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why? please explain.
 
Losing 40% power and spending tons of extra time and money on lightweight and aluminum? Seems smarter to just build them like normal since no one has been able to put it all down anyway.
 
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 .
 
COMP461 said:
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 .
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Bullchit. I have dyno graphs here doing over 1000/rpms a second and I sure as hell didn't loose 40%.
 
I don't believe a diesel will even make power at 1000 rpm's per second.
This is on an engine dyno. I would love to see that dyno sheet, that means a pull last 1.5 to 2 seconds
 
TheBigNasty said:
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.
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Thanks, I'm still struggling with the 40% figure.
 
I'll post it when were home, it was doing exactly 1000 rpm over one second. AND that was coming off no boost, I know it would be steeper brake boosted.

Just look at the two second hero pulls Dimitri's been making, would guess they are in the same range and better.
 
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