Looks like I will be spending more money on my car.

Southwest Montana SCCA discussions for the 2003 season.
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RayAR
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Looks like I will be spending more money on my car.

Postby RayAR » Thu Oct 09, 2003 10:13 pm

First thing. Where is everyone? There has gotta be something we can talk about.

Well I finally priced out how much it will cost to fix my driveshaft vibration. It looks like Dodge dosen't service the U-joints seperatly so a new driveshaft is over $1000 and the carier bearing is $60 even with my employee discount. I am going to take some measurements and see if I can match up some U-joint from a parts store but I kinda have my doubts. I could get lucky though. If I can't match up u-joints then I will be buying a carbon fiber shaft for $900. It seems like the upkeep is never ending. I guess there are 2 sayings that are very true. "If you want to play then you gotta pay" and "speed costs money, how fast do you want to go?" :cry:
1990 Mazda Miata. Most fun you can have with only 116 HP!!!!!!

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Postby JoeE » Fri Oct 10, 2003 11:12 am

:shock: $1000?!?! Damn, dude. Is it just a tube with u-joints in each end?
I wonder if someplace like Midwest could cut the old u-joints out and put new ones in?
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Postby RayAR » Fri Oct 10, 2003 12:51 pm

JoeE wrote::shock: $1000?!?! Damn, dude. Is it just a tube with u-joints in each end?
I wonder if someplace like Midwest could cut the old u-joints out and put new ones in?

I know. Actually it is a 2 peice driveshaft. Still 2 tubes, 3 joints and a carrier bearing. Just by looking it looks like it uses very commen Spicer 5-153x joints. At least they look similar in size. I need to get my Jeep done so I can pull the car into my shop for a few days and fix all of my little problems. Getting a lightwieght 1pc carbon fiber driveshaft would be nice, dyno testing has shown an increase of 25 wheel horsepower with just that one change. If I get one of those and finally get rid of my stock exhaust I should be over 400 AWHP with a bit of tuneing :P
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Postby rkaiser » Fri Oct 10, 2003 1:04 pm

You know you need the carbon fiber driveshaft - time to loose a little weight on that beast! :) I don't even want to think about how much has gone into the Cossie over the last two years. however, it's all forgotten when I drive it :D
Russ

1995 Escort Cosworth - a little less of a headache
2013 Subaru STI - RPM Speedwagon

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Postby RayAR » Fri Oct 10, 2003 5:17 pm

rkaiser wrote:You know you need the carbon fiber driveshaft - time to loose a little weight on that beast! :) I don't even want to think about how much has gone into the Cossie over the last two years. however, it's all forgotten when I drive it :D


So which car do you like better? Just my opinion but the Cosworth is something special. The STi is pretty impressive but it is still just a Subaru just like my car is just a Mitsudodge. I still think the Cosworth could be setting fast time of the day at most of our events if it had stickier tires. Any mods planned for the Scooby?

The driveshaft will wait until spring but I still hope to get the ujoints measured so I can check around for some. It also looks like the same company that builds the carbon fibre shaft for my car also builds aluminium shafts and they are much less expensive. I am going to look into that. I guess most of the horsepower increase is from getting rid of the 2 piece driveshaft and carrier bearing but the lightweight shaft would be easier to spin up to speed so that helps the numbers on a dyno.
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Postby JoeE » Fri Oct 10, 2003 5:23 pm

Just my opinion but the Cosworth is something special.

I definately agree with that.

the lightweight shaft would be easier to spin up to speed so that helps the numbers on a dyno.

And on the road. :)
Joe
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Postby rkaiser » Fri Oct 10, 2003 5:53 pm

The Cosworth is definitely something special - still can't believe I have one :) The Cossie handles a lot better than the STI. The steering feedback and response is great - better than the BMW E30 M3! It's lighter than the STI and the coilovers, strut tower bars and the incredible tight steering make it a very fun car to drive. The STI is a Subaru but it's kinda like the Cosworth is a Escort :) The STI for a off the showroom car is fantastic. It has so much more low end power and torque than the Cosworth. Definitely need to use different driving styles between the two cars (as seen at Skyview!) It does lack the Cossie's big ol turbo boost though but it's dang quick and the boost builds much sooner. Been making me think about getting a smaller turbo for the Cossie! However, I think when I get the ignition timing finally tuned on the ECU, I should be seeing some decent low rpm improvments. As for now there are no plans to upgrade the STI - it's too much car for me as is! Maybe just some snow tires and mudflaps :D

Dang, you mean that Stealth is going to be accellerating even faster. Time for some 5 point harnesses I think!
Russ

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Postby RayAR » Sat Oct 11, 2003 12:40 pm

Considering I am thinking about only useing 2nd gear even on the hairpins(like Rick) the car won't have as much power comeing out of turns. It's really going to help me concentrate on my driveing and that will help me more then explosivness out of the turns. probably wont be as fun though. :)

from what I have been hearing about the carbon fiber driveshaft is it makes the car feel like it is more RW biased then FW. Thats a good thing and will help out with my push a bit.
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Postby JoeE » Mon Oct 13, 2003 11:26 am

from what I have been hearing about the carbon fiber driveshaft is it makes the car feel like it is more RW biased then FW.


I wonder why that is? Doesn't seem like it would make a difference in that aspect, but I'm probably missing something...
:?:
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Postby RayAR » Mon Oct 13, 2003 12:55 pm

Not sure why either but here is the theory. The lightweight shaft only lightens up what goes to the rear axle, the front rotating weight stays the same so the only difference in rotating mass is in the rear. The loss through the carrier bearing is also removed.

I also found it hard to believe that a lightweight driveshaft would free up 25 AWHP but that one has allready been dyno proven. I guess most of that new found horsepower would be going to the rear axle.
1990 Mazda Miata. Most fun you can have with only 116 HP!!!!!!


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