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Old 09-19-2015   #781
mondale
 

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Re: Mark's 1G Winter Projects

That thing was hauling so much ass. Get it back together for the 10-11th at rock falls! Johnnys car might be there if he can keep out of the liquor and get his car buttoned up.
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Old 09-19-2015   #782
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Re: Mark's 1G Winter Projects

167? hot damn!!
Getting close man, keep it up!!
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Old 09-19-2015   #783
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Re: Mark's 1G Winter Projects

How about a custom rear section drive shaft? Spicer 2-2-329 flange might work but probably requires drilling new mounting holes for the 3kgt flange bolt pattern. It is a 1310 series joint so it's way stronger than factory dsm u joint. And maybe do a 3" DOM tubing? I haven't figured out the cv head section yet that will bolt up to the driveshaftshop adapter.
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Old 09-19-2015   #784
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Re: Mark's 1G Winter Projects

Bummer to hear man. Saw u a couple times cruising around on your 4 wheeler.
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Old 09-24-2015   #785
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Re: Mark's 1G Winter Projects

Crazy, I need to check mine now.
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Old 09-25-2015   #786
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Re: Mark's 1G Winter Projects

I got some in car video from PG! Here is Mark's car when it let broke the U joint, and mine was having fuel issues later to find out clogged injector.

9.5 finger racing..............


http://www.youtube.com/watch?v=TF1TEYxBwFE&hd=1
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Old 09-28-2015   #787
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Re: Mark's 1G Winter Projects

Quote:
Originally Posted by URV8SUX View Post
I got some in car video from PG! Here is Mark's car when it let broke the U joint, and mine was having fuel issues later to find out clogged injector.

9.5 finger racing..............
I still won my race with a 10.9!.....I looked calm, I wasn't!
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Old 09-28-2015   #788
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Re: Mark's 1G Winter Projects

I called dss, the only way to get an upgraded u joint in the rear is to buy a 1 piece carbon fiber shaft, which they recommended to upgrade to a 1 piece shaft anyway. I can better control the pinion angle now too. It will be better now for next year!
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Old 12-23-2015   #789
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Re: Mark's 1G Winter Projects

It’s been a while since my last update. I had a 1 piece carbon fiber driveshaft made by dss after I destroyed my dss aluminum HD shaft. This allowed me to move up to a stronger 1310 style u joint too. It's crazy long, I can't wait to see how the CF reacts vs the old 2 piece.



I also needed to strengthen up the mounting of the rear end, the brace in the rear broke once, the torque literally ripped it apart. Check out how the chromoly ovaled.



I increased the tube wall thickness to .120 from .083, and machined end caps that will be all welded up.



And the factory mounts were weak too, so I made stronger ones out of DOM 1026 tube:




Luckily I have a lathe for all this type of stuff.

Also I’m upgrading to a 72mm Gen2 PTE turbo this winter, it will make the car even more crazy!
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Old 12-24-2015   #790
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Re: Mark's 1G Winter Projects

That CF driveshaft is sweeeeet. And I can't believe you're bending the mounting pieces, that's crazy power, hopefully the 50% thicker wall holds a bit better haha.
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Old 12-24-2015   #791
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Re: Mark's 1G Winter Projects

Looks good Mark those new insert will do a lot better. It seems like your downgrading by going to smaller turbo.
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Old 12-24-2015   #792
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Re: Mark's 1G Winter Projects

Nice work.
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Old 12-24-2015   #793
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Re: Mark's 1G Winter Projects

Quote:
Originally Posted by URV8SUX View Post
Looks good Mark those new insert will do a lot better. It seems like your downgrading by going to smaller turbo.
Love it. You beat me in eliminations at map's event. You're on to something with a smiller turbo, I thought I would give a try....
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Old 12-28-2015   #794
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Re: Mark's 1G Winter Projects

Finished up the stronger rear 3rd member mount. Just need an alignment now.

My tube notching skills are improving. I started using a digital angle finder, the results are below:





I added a center support to the mounting locations, to make sure there were no issues with the design, in regard to the bolted joint preload. The rear end was used as the fabrication jig for these:



And finish cut:



And the final product installed:

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Old 12-29-2015   #795
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Re: Mark's 1G Winter Projects

Good Lord that's pertty!
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Old 12-29-2015   #796
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Re: Mark's 1G Winter Projects

Beautiful fab work!
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Old 12-29-2015   #797
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Re: Mark's 1G Winter Projects

Are your outer CVs 930s?
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Old 12-29-2015   #798
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Re: Mark's 1G Winter Projects

I remember Marco going with a tubular subframe after he bounced his pumpkin down the track ten years ago. Yours looks like it can handle the abuse.

Also, the carbon fiber must take up some of the shaft harmonics as I remember Brent was having issues with his one-piece aluminum driveshaft years ago and then he sold it to me.
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Old 12-31-2015   #799
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Re: Mark's 1G Winter Projects

Thanks for the kudos guys.


Quote:
Originally Posted by bramagedained View Post
Are your outer CVs 930s?
I'm not sure, they are dss pro axles made to work with the 3kgt rear. This is the dss description on their site:

"These axles feature much larger aerospace grade 36 spline bars (factory are 30 spline), billet ball & cage inner CV, and a Porsche-style 108mm outer CV"


Quote:
Originally Posted by Goat Blower View Post
I remember Marco going with a tubular subframe after he bounced his pumpkin down the track ten years ago. Yours looks like it can handle the abuse.

Also, the carbon fiber must take up some of the shaft harmonics as I remember Brent was having issues with his one-piece aluminum driveshaft years ago and then he sold it to me.
Carbon fiber has about a 50% better critical speed than aluminim. An aluminum driveshaft that long will violate critical speed guidlines, significantly, causing severe vibration/harmonics. There are dsm'ers that have successfully used 1 piece cf driveshafts to over 180mph, it's proven to work. It's a good rotational weight savings too. I didn't weigh the exact difference, but it's noticeable.
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Last edited by Mark Leasure; 12-31-2015 at 07:57 AM..
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Old 12-31-2015   #800
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Re: Mark's 1G Winter Projects

Quote:
Originally Posted by Mark Leasure View Post

I'm not sure, they are dss pro axles made to work with the 3kgt rear. This is the dss description on their site:

"These axles feature much larger aerospace grade 36 spline bars (factory are 30 spline), billet ball & cage inner CV, and a Porsche-style 108mm outer CV"
The mostly likely are the Porsche 930 CVs then.

Some people on Hybridz seemed concerned about their strength in the setup that went in my car, despite the fact they get used in a lot of stuff.

Which I thought was kind of silly.
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