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Post by MASSIVE TYPE IV » Thu Jan 22, 2004 11:27 pm

well, Testing was well underway today until I hit a snag at about 6,300 RPM....

We made tremendous headway and LEARNED ALOT today! The shroud is ON THE WAY to being AWESOME! It still needs more work but its showing big potential.

Anyway, at about 6,300 we saw something fly out of the engine, or near the engine... The floor shook and then something sounded like a shotgun in the dyno cell. I thought the junkyard 2165 had given up a rod till we went in and found what you will see in the pics I sent to Crimson Axe to post for me here....

This shaft is designed for a Four wheel drive Dodge truck, Mr. stuska promised me I'd never break it. It holds 1500HP on model 800 dynos, 182 BHP did this....

I'm hell on parts!!!! YEAH ! YEAH!!

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Post by Crimson_Axe » Thu Jan 22, 2004 11:37 pm

The pictures

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Post by NO_H2O » Thu Jan 22, 2004 11:40 pm

Yep it D@MN sure broke and in a dynamic way. I just happend to be in the control room when it went. I was in the dyno room a little earlier measuring air flow out of the oil cooler outlet, glad it didn't go then. I think I would have soiled myself.
I have never seen someone so happy to break something. It will cost about $400 to fix it and Jake was yelling "Hell ya" "Thats cool" "isn't that cool".

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Post by DesiJae » Thu Jan 22, 2004 11:43 pm

What kind of rivets do you use on these shrouds? I have seen one in person and was suprised. Just wondering about long term use. Regular daily use in rain and such.

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Post by sparkmaster1 » Fri Jan 23, 2004 12:00 am

Cool, More parts for the "trophy' shelf. Since it was off a Dodge Truck I guess it wasn't made for everyday use. LOL. Should have been off a Chevy!!. Would a CV be better for an application like that? Tim
Owner Tim's ACVW Engine/Trans Service

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Post by Class 11 streeter » Fri Jan 23, 2004 12:49 am

Whoa......thats cool..........uh huh huh huh.........

The Dodge Power Wagon crowd absolutely WORSHIP Dana/Spicer drivetrain parts as being "unbreakable". Jeep freaks use that stuff too........no wonder, that $h*t's expensive! Wait till someone tells them about this! :lol:
So you think your project is taking forever eh? Well you've got nothing on me.....


Post by Guest » Fri Jan 23, 2004 12:54 am

Damn Jake
:shock: :shock:

When I first started reading the post I thought the bolts I put on when I reversed the drive plate let go. But I see it broke at the joint not the plate. You must have been doing another power pull to be at 6300! Hope your not held up to long, on another note I checked out a retired 83 year old Navy Captains private Machine shop that he is selling today. He was a pilot and his last project was building his own plane before his health failed. Anyway the list of equipment is awesome and he is taking bids. I can fax you the list if you might be interested in anything for your shop. Perhaps a Powermatic model 1150 15" floor drill press or Bridgeport Mill model 12/BR 2J-42 with a DRC-500 digital readout. Let me know if you want to see the list. I was like a kid in a candy store and came home to prepare my bids.

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Post by MASSIVE TYPE IV » Fri Jan 23, 2004 12:58 am

Yep, its breakable...

Someone mentioned the rivets we use in the shroud...

They are regular old rivets, these shrouds will last just fine. I have seen them with 100K+ miles on them and in the same condition as when Joe made them. The shroud has no load on it and it absorbs vibration well... I have used these shrouds on engines for offroad cars that make it through literal hell.. if you break the shroud you patch it up with fiberglass and bondo!

This is not a new shroud design, it has been around since 1994.... I don't build things that break, or things that are weak..


Post by Billyisgr8 » Fri Jan 23, 2004 2:03 am


I bet I know what happened....

Where is the grease? That u-joint bearing shaft looks awfully black.

If the drive shaft is close to parrellel than the roller bearings dont get the chance to rotate and spread the grease ( doesn't look like there was any in the picture). Causing them to heat up and seize. Weakest link then gets the off angle stress load.

This u joint does not have any grease in the webbing Make sure you buy U-joints with grease nipples and grease them.

Hmmmm..... now you owe me for the manifolds and some advice too :D just kidding.... I'll get a cam sugestion 1 day....


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Post by ratwell » Fri Jan 23, 2004 3:07 am

MASSIVE TYPE IV wrote:This shaft is designed for a Four wheel drive Dodge truck, Mr. stuska promised me I'd never break it.
Always use Genuine Mopar parts and accessories. ;-)

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Post by VW_Factor » Fri Jan 23, 2004 3:14 am

That Mopar thing isnt exactly true.. Dana makes some weird stuff these days that they put under Jeeps nowadays.. Weak parts.. Of course for weight savings.. Im sure that Jakes Dyno had some of those parts..

Im sure plenty of people know that parts off lets say a Dana 60 are extremely tough, and rarely break under hard off-road use..

Otherwise.. Kudos to you Jake.. I would be proud to break something like that as well, with some good ol VW power..

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Post by stkbus » Fri Jan 23, 2004 8:34 am


Per our conversation this morning I spoke with our engineers and dyno folks, plus showed them the pictures. They provided several options, formulas and the information on who we are having our couplings made by. Give me a call at work.

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Post by MASSIVE TYPE IV » Fri Jan 23, 2004 9:25 am

I'll call you after while.... I think I just found a replacement part.. I have to get back up and running before the weather takes a big turn for the worst. I can upgrade later...

Fact is that the piece had been cracked for a while. You can see it broke through the middle of an old crack just from the discoloration...

I keep that sucker greased like crazy. All the grease that was in it ended up every where else, that shaft was turning over 6K when it came unglued! The shaft has been over 8,500 RPM and has held 240-260 HP loads getting dropped all of a sudden at 6K almost daily..

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Post by davebuckholts » Fri Jan 23, 2004 9:50 am

Might as well break something that is "unbreakable" if you're gonna do it!
Jake, you gonna be around the shop Saturday afternoon? I'm heading up to the Nacoochee/Sautee Center to see a buddy play some music and thought I may drop by if you're around.


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Post by mharney » Fri Jan 23, 2004 9:54 am

I am really surprised that it broke. Spicer parts are usually damn tough. But then, you put it through the mill day in and day out, and you make it do things that the regular use of it wouldn't, you have to expect something to happen eventually, I suppose. Good job breaking it!