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Old 01-25-2011, 03:44 AM   #1396
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Earlier this month did a barrel roll in the second lap of the mains. Broke the rear upright.

At my LHS I noticed that Mugen had already redesigned the rear uprights. They added additional ribs on both sides of the original rib. I'm glad they did this because I've had harder impacts on my MRX4 and never broke a rear upright in this manner.

Look at the attached photos and you can see the part I broke and the replacment part thats available on the shelves here.
Thanks for the feedback. Is this new rear upright a running change or a new Part Number?
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Old 01-25-2011, 04:06 AM   #1397
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Have you tried this Ralph? This is what Robert used to TQ wasnt it?

Also has anyone tried the new 909 with the central fin and lower sides?
yes the team tried and liked the r-15 we also tried the new p909 with the center fin, i like the original p909 best then the r-15 the new p909 was ok.
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Old 01-25-2011, 04:07 AM   #1398
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Thanks for the feedback. Is this new rear upright a running change or a new Part Number?
i cant beleave mugen would make a new rear upright when thats not the god damm problem to fix, fix the damm front end allready and shorten the side belt!!!!!!!
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Old 01-25-2011, 04:09 AM   #1399
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Originally Posted by West03 View Post
I mounted the p909 at 25mm and the car went from stable to almost un-driveable. Rear of the car just kept stepping out throughout the fast corners and pushed in the slower corners.

I originally had the body mounted at 18mm with little room for the finger to get excess to the fuel tank lid. The car at that stage was able to fight for tq and had set one of the fastest times of the day at our recent state titles. Easy to drive on the limit. However my pitman was going to struggle to get his fingers in to pull the lid, so I mounted the new body forwards. Lets say its an annoying lesson and something I won't do again. I believe 20 - 18mm is the best position for the MRX5 with the p909.
i agree with u what i said before i would start with 20mm with pins back.
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Old 01-25-2011, 04:36 PM   #1400
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I finished building my new MRX-5 and the car looks great . The drive train feels very free. I can't wait to take it out for a spin.
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Old 01-25-2011, 08:00 PM   #1401
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Originally Posted by ralphierace13 View Post
yes the team tried and liked the r-15 we also tried the new p909 with the center fin, i like the original p909 best then the r-15 the new p909 was ok.
Thanks Ralph. Will get one to try.
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Old 01-25-2011, 08:26 PM   #1402
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I finished building my new MRX-5 and the car looks great . The drive train feels very free. I can't wait to take it out for a spin.
good job walo now get out there and smash it into a wall in a half of lap like your good at doing!!!
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Old 01-25-2011, 08:29 PM   #1403
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Originally Posted by ralphierace13 View Post
i cant beleave mugen would make a new rear upright when thats not the god damm problem to fix, fix the damm front end allready and shorten the side belt!!!!!!!
Here here!!!
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Old 01-25-2011, 11:03 PM   #1404
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Is this correct assumption ?

When I mount the body farther from bumper ( ex. 18mm gap from bumper ) = I get more steering but expect to get less stability at rear end ?

When I mount the body close to bumper ( ex. 6mm gap from bumper ) = I get less possible steering but I have more stability at rear end ?

Increasing the height of rear wing ( ex. additional 15mm height increase ) = more stability at rear end ?
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Old 01-25-2011, 11:20 PM   #1405
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yes the team tried and liked the r-15 we also tried the new p909 with the center fin,

Slightly changing the subject, where can you purchase this new shell from.

Andy
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Old 01-26-2011, 05:06 AM   #1406
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Originally Posted by Shepherd View Post
yes the team tried and liked the r-15 we also tried the new p909 with the center fin,

Slightly changing the subject, where can you purchase this new shell from.

Andy
brooklyn hobbies can get u any shell..
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Old 01-26-2011, 05:08 AM   #1407
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Originally Posted by asw7576 View Post
Is this correct assumption ?

When I mount the body farther from bumper ( ex. 18mm gap from bumper ) = I get more steering but expect to get less stability at rear end ?

When I mount the body close to bumper ( ex. 6mm gap from bumper ) = I get less possible steering but I have more stability at rear end ?

Increasing the height of rear wing ( ex. additional 15mm height increase ) = more stability at rear end ?
yes your theroy is right but i would not go 6mm from bumper!! your car might only go stright lol
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Old 01-26-2011, 05:11 AM   #1408
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Hey fellow MRX5'ers,

I have a problem with mine which I'm hoping you can help me with.

I use a Hudy set up station. I set the car up, including toe, camber, tweak etc. absoutely perfectly. I true tires exactly the same using a Hudy truer.
As far as I'm concerned the car shoud run dead straight after all this. Trouble is, I put the car on the track and find I have to put steering trim in every time which means I end up with one front toeing out and the other toeing in.

Any thoughts/suggestions??

Any help will be much appreciated...
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Old 01-26-2011, 06:11 AM   #1409
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Originally Posted by Motonica#1 View Post
Hey fellow MRX5'ers,

I have a problem with mine which I'm hoping you can help me with.

I use a Hudy set up station. I set the car up, including toe, camber, tweak etc. absoutely perfectly. I true tires exactly the same using a Hudy truer.
As far as I'm concerned the car shoud run dead straight after all this. Trouble is, I put the car on the track and find I have to put steering trim in every time which means I end up with one front toeing out and the other toeing in.

Any thoughts/suggestions??

Any help will be much appreciated...
When you set front toe out, you must align the quick levers. I like to set them vertically when checking toe, and horizontally when checking camber. If they ain't parallel you may have different angles L&R, even though they seem the same when reading the gauge values

And of course check front one way bearings, sometimes if you put too much oil in them, they could slip, pulling the car away from the straight line.

All of this assuming that your shocks and down-stops are equally setted.

ciao
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Old 01-26-2011, 06:26 AM   #1410
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Thanks for the feedback. Is this new rear upright a running change or a new Part Number?
The part number on the bag hasn't changed. It's still H2124. I would say this is a running change.
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