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View Full Version : IRS 9" Rear End Conversion S & Z Chassis (No More Broke Rear Ends!)


98golws6
03-03-2016, 01:38 PM
Hey guys/gals,

Wanted to share our build with everyone. Clockwork Motorsports and myself partnered with The Driveshaft Shop (DSS) to bring you a bolt in 9 inch option to your s or z chassis'.

Quick background...I got tired of going to the track and breaking stub shafts left and right. I was wasting money traveling and essentially taking myself out of the competition or ruining a fun track day. I had an upgraded diff, DSS half shafts and DSS driveshaft, but there is not an upgrade for the stub shafts (the small shafts in the side of the R200). I even went as far as having the stub shafts heat treated but to no avail.

After talking with The Driveshaft Shop, we had a game plan. I went back to Clockwork Motorsports to discuss with my crew chief. Being a mechanical engineer, he started drawing up his ideas in 3d CAD. Long story short, we developed a bolt in solution utilizing our modified subframes. We took a DSS 9" IRS Housing and modified it to mount directly to the stock rear subframe mounts. The front support is modified due to how large the 9" is and getting the correct pinion angle. The tubular support is braced to handle the shock and loads thrown at it. The pinion support was drawn up in cad as pictured below. The DSS 9" axle stubs are made of 300M material rate for over 1400hp.

I have ran this exact setup for 1.5 years with no issues making over 800hp/tq. It has seen street use, dragstrip use, sticky tires, track and drift use.

We are finalizing prices for everything, but each case will depend on the parts you want:
9" 3rd member casings style
gear ratio
which level DSS Axles
Steel/carbon/aluminum/chomoly Driveshaft
differential
powdercoated/painted/bare
etc

Message or post with any questions or inquiries.

98golws6
03-03-2016, 01:40 PM
Here are a few pictures

Benedict
03-03-2016, 01:53 PM
bad ass work
that front camber gain in the last pic looks rough

03-04-2016, 02:57 AM
What kind of 60's are you getting with it?

brndck
03-04-2016, 05:54 AM
very cool to see new product!

slow92
03-04-2016, 10:31 AM
This is awesome. I would be interested in how much this would cost when you guys figure all of that out. It would be more versatile than a q45 rear differential as far as allowing the use of different rear end gear ratios and not breaking axles.

KAT-PWR
03-04-2016, 11:06 AM
Glad to see this has made its way to s-chassis. My buddy has been running this in his 750hp (I think makes more now) drag FD rx7. It has held up great.

98golws6
03-21-2016, 07:11 AM
What kind of 60's are you getting with it?

I was running a drag radial and car was setup for drift but I was in the 1.6's. Plan on running a bigger tire this year as drift season allows.

Evo_1320
03-21-2016, 08:29 AM
this is a great thing. I want to get one too.

Boosted_ATL
03-25-2016, 10:31 AM
I'm interested to know once pricing is available. G force wants way to much for there 9" kit. v8 and drag radials my J30 diff/axles are a time bomb.

I6_Power
08-23-2016, 10:30 AM
PM'd for more details...

EnvisionMore
08-23-2016, 11:34 AM
Anymore updates on this?

TheRealSy90
08-23-2016, 12:43 PM
What kind of clutch type LSD's are available for this differential?
Can it be done with the S13 subframe? Some people don't want the "benefits" of the s14 pickup points.