*BILLET* aluminum rods - Page 3 - Competition Diesel.Com

AHall · 07-24-2012, 03:17 AM

Quote:

Originally Posted by AHall

How much are you destroking 5.9's for the high rpm lightweight theory?

No one knows?

DIESEL_POWER · 07-24-2012, 08:18 AM

steel pistons are cool...

*COMP461* · 07-24-2012, 09:46 AM

Quote:

Originally Posted by AHall

No one knows?

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?

DieselLance · 07-24-2012, 10:02 AM

my head hurts....

*COMP461* · 07-24-2012, 10:39 AM

Quote:

Originally Posted by Lance@Alligator

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.

DieselLance · 07-24-2012, 10:42 AM

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

Tate · 07-24-2012, 02:45 PM

Quote:

Originally Posted by COMP461

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.

*COMP461* · 07-24-2012, 04:07 PM

Quote:

Originally Posted by Tate

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.

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

Signature600 · 07-24-2012, 04:11 PM

Quote:

Originally Posted by COMP461

that puts my dragster down to 1550 with a 200 lbs driver, and with Jordan its down to 1450

Does it matter what it weighs sitting in the driveway?

Chris

*COMP461* · 07-24-2012, 04:22 PM

shooting for Indy in 4 weeks, can't wait , a quarter of a million people in 7 days of racing.

dvst8r · 07-24-2012, 11:24 PM

Quote:

Originally Posted by COMP461

...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...

*COMP461* · 07-25-2012, 09:06 AM

Quote:

Originally Posted by dvst8r

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.

Kaiserbailey · 07-25-2012, 11:00 AM

Quote:

Originally Posted by COMP461

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.

why? please explain.

AHall · 07-25-2012, 11:03 AM

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.

*COMP461* · 07-25-2012, 12:34 PM

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 .

Joesixpack · 07-25-2012, 01:06 PM

Quote:

Originally Posted by COMP461

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 .

Bullchit. I have dyno graphs here doing over 1000/rpms a second and I sure as hell didn't loose 40%.

*COMP461* · 07-25-2012, 01:39 PM

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 · 07-25-2012, 01:52 PM

Quote:

Originally Posted by Kaiserbailey

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.

Kaiserbailey · 07-25-2012, 01:58 PM

Quote:

Originally Posted by TheBigNasty

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.

Thanks, I'm still struggling with the 40% figure.

Joesixpack · 07-25-2012, 01:59 PM

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.

07-24-2012, 08:18 AM	#42
DIESEL_POWER Name: DIESEL_POWER Title: NGM Diesel Status: Not Here Join Date: Jul 2006 Member`s Gallery Posts: 5,178	steel pistons are cool... __________________ Proverbs 3:5-6 (KJV) 5 Trust in the Lord with all thine heart; and lean not unto thine own understanding. 6 In all thy ways acknowledge him, and he shall direct thy paths.

07-24-2012, 10:02 AM	#44
DieselLance Name: DieselLance Title: Too Much Time Status: Not Here Join Date: May 2012 Location: Monroe, GA Member`s Gallery Posts: 672	my head hurts.... __________________ 95 12V farm truck with a couple stickers

07-24-2012, 10:42 AM	#46
DieselLance Name: DieselLance Title: Too Much Time Status: Not Here Join Date: May 2012 Location: Monroe, GA Member`s Gallery Posts: 672	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 __________________ 95 12V farm truck with a couple stickers

07-24-2012, 04:22 PM	#50
COMP461 Name: COMP461 Title: Comp Diesel Sponsor Status: Not Here Join Date: Apr 2006 Location: Aledo Member`s Gallery Posts: 4,009	shooting for Indy in 4 weeks, can't wait , a quarter of a million people in 7 days of racing. __________________ Greg Hogue Comp461 race page Edelbrock Nitrous Outlet MaxSpool Engineering Exergy Performance Last edited by COMP461; 07-24-2012 at 04:25 PM.

07-25-2012, 11:03 AM	#54
AHall Name: AHall Title: Hobbyist Status: Not Here Join Date: Apr 2007 Location: Western Slope, CO Member`s Gallery Posts: 4,603	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. __________________ -Adam Prostreet F-100 Build Thread http://www.competitiondiesel.com/for...112541&page=24

07-25-2012, 12:34 PM	#55
COMP461 Name: COMP461 Title: Comp Diesel Sponsor Status: Not Here Join Date: Apr 2006 Location: Aledo Member`s Gallery Posts: 4,009	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 . __________________ Greg Hogue Comp461 race page Edelbrock Nitrous Outlet MaxSpool Engineering Exergy Performance

07-25-2012, 01:39 PM	#57
COMP461 Name: COMP461 Title: Comp Diesel Sponsor Status: Not Here Join Date: Apr 2006 Location: Aledo Member`s Gallery Posts: 4,009	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 __________________ Greg Hogue Comp461 race page Edelbrock Nitrous Outlet MaxSpool Engineering Exergy Performance

07-25-2012, 01:59 PM	#60
Joesixpack Name: Joesixpack Title: Pull'n it. Status: Not Here Join Date: Apr 2008 Member`s Gallery Posts: 4,118	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. __________________ Basically stock if I would have built it at the factory.....