Billet & Forged Crankshafts

[grape]

i think our race stuff starts life as a 10" diameter forged billet.............kinda heavy

[gmctd]

Think I'd like to try some of that billet cola, even better if they had it in 'pepper............

[More Power]

Member Hans Hauschild recently sent me the following photos of GEP's new 6.5. You can see the GEP banner behind the engine.





I was told last summer that GEP was planning to increase power from 205 to 235. Hans indicated to me that GEP is now saying 250!

Part of what I heard last summer involved forged steel crankshafts, a block girdle, cooling system mods and fuel system upgrades.

A asked an independent OEM yesterday about the new engine and the billet crankshafts. I was told "Crankshafts are being stockpiled - approx 400 to 500. The machining takes longer because of the material. The first ones are made from billet steel to run tests."

It appears from the above images that the girdle is sectioned a bit (notched) on each side to show its design.

Notice what looks like an electric fan-clutch....

It's interesting that they used 1989-95 accessory drive components, though the belt tensioner is in a non-stock location.

Some have theorized that the compression ratio has been reduced to accomodate the 250 hp rating.

More news when it becomes available....

Jim

[ronniejoe]

Using machined from solid (billet) components for testing is very common, even in the aerospace world. Large scale production usually would wind up being made from forgings.

That girdle looks very similar to the one that Andrew Ashwill made for his engine project. His was "billet", this one is cast.

[john8662]

Check out the t-stat housing, looks like it'll better accomodate DB2-type MFI injection pump, it's wide enough in appearance to hold dual stats.

Hmm...

Thanks for the pics Jim.

Pron for us Diesel heads...

J

[More Power]

Looks like intercooler plumbing on top of the engine as well...

Jim

[JoeyD]

I am glad they are still working the 6.5 but why go with a girdle when they could just design a deep skirt block?

[JohnC]

I like the polished billet oil filter...

[Hubert]

Cool!!! Glad to see new stuff and development for the future.

Just day dreaming really but I had pondered some thoughts about some type of REALLY BEEFY oil pan in conjunction with main girdle for a bolt on way of helping stiffen up things on bottom. That girdle looks pretty good. Also new pan to increase oil capacity.

I wonder if they incorporated any more or better oil cooling and or oil capacity with new bottom end "extension" ????

[john8662]

I like the polished billet oil filter...

Prolly Chrome

[More Power]

I've wondered what the angled forms indicate in this image. Any ideas?

[EWC]

Clearance for a stroker crank

[ronniejoe]

Cast stiffening ribs for strength.

[simon]

What about meat for splayed main bolts?

[Robyn]

I too am currious as to why they did not cast the new blocks with a deep skirt and use cross bolted mains as was done in the Ford 427 Y blocks.

Far better design.

May have something to do with exisitng equipment and the overall cost to redesign the beast.

Probably more cost effective to just beef up the trouble areas and add the girdle instead.

The T stat area does not supprise me at all. The military is still using the DB2 pumps and probably always will to keep away from the nightmare of the electronics.

The DS4 would be a poor choice for a rig going into battle.

The Hummers are simple trucks that have simple mechanics that can be worked on under the poorest of conditions.
To bolt on the complexities of the DS4 would be foolish me thinks.

The DS4 was not done to the civilian rigs to make our life any better, it was to meet the EPA BS that is being shoved down our throat.

I can see though that this new engine should be a nice retrofit into our trucks.

With that big girdel on the bottom I wonder if there is enough room to fit it all into a pickup or Burb without issues with the front axle????????? Just a thought.

Robyn

[Robyn]

Just another thought.
After looking at the nice pix Jim posted, I think that big spacer/girdle is made of aluminum.

Same color as the front cover and such and if it was iron they probably would have painted it.
Unless its painted silver to just look kewl. ???????????

I would like to get a close look at that engine, as in touchy feely ;0)
I am also suspicious that those large stiffener bulges on the sides may have bolts going through them possibly counter bored into the lower rail area.

Get us a piccy of the inside of this beastie ;0)
Robyn

[a5150nut]

Whats with the crank case vent hose. Does it run back into the filler neck or is that a second one into a "Y" going to the turbo? And with the center mounted turbo, will it fit in Pick Up's? Hmmmmmmmmmmmmmmmm...........

[gmctd]

Where you guys (and gal) seeing all this detail - all I ever get is great blank spaces with really huge letters to the effect of www.TheDieselPage.com

i think this computer hates me...............

[DmaxMaverick]

Where you guys (and gal) seeing all this detail - all I ever get is great blank spaces with really huge letters to the effect of www.TheDieselPage.com

i think this computer hates me...............

If you are seeing that image, you are either not logged in, or are logged in using the incorrect URL/IP.

Log off.
Click www.thedieselpageforums.com/tdpforum and log in w/ your user/pass.

If your login URL contains numbers, well.....there's your problem....

If you are still not seeing the correct images, you have a browser security or cookie issue. No cookies, and you will loose your login priveleges in just a few minutes, even if it still shows you logged in.

If you still can't get it, send me an email.

[More Power]

robyn said: I too am currious as to why they did not cast the new blocks with a deep skirt and use cross bolted mains

I've wondered the same thing.

Here's a photo I took while visiting DMAX in 2001, showing the deep skirt design used in the Duramax 6600. Side captured main caps would be nice for the 6.5... Jim