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Old 05-29-2006, 09:18 AM   #1396
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Default Delta mfg. hard coated pinions.

As told some days ago. I've ordered some 1st gear pinions from Delta mfg in the search of a more durable 1st gear pinions. Well.. they're here and the looks are incredible.

Test fitted one just to match with the stock aluminium one and there are slight differences, but the most important (gear mesh and the teeth are sharper at the end) has passed with an A, the only 'but' is they are slightly thinner (the collet that separates it from the 2nd gear is thinner). The main measurements of the pinions are (on italics are the Delta measurements:

Total width: 8.48mm / 7.74mm
Width of the pinion gears: 6.58mm / 6.70mm
Width of the separating collet: 1.90mm / 1.04mm

Just dissasembled one spare clutch bell and removed the stock 17T pinion and put a 17T Delta one and did the test of meshing on my car where before was perfectly meshed with stock pinions. The test has passed great.

The main 'concern' could be the slightly thinner collet separator, but this isn't problematic because the pinion grips all over the spur gear, so less chances of stripping a spur due to uneven wear. The finish of the pinions are finished in matte.

Photos a little later when I'll arrive to home (haven't had of doing a photo for main differences).
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Old 06-01-2006, 10:18 AM   #1397
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Quote:
Originally Posted by AKSHUN
Mike Strack, how are ya??
its me steve, i met you guys in cincinnati for the mid-west race.
never got a chance to say thanks for all your help, i left during the "A" main, had a long drive.
i see you and Ron did pretty well.
i have been working on the rear end of my car, and i have been trying different droop settings, never realized how important it was till i got home to my club track in hamilton.
ive managed to improve my personal best by 1.5 secs and made the"A" main the last 2 weekends.
thanks again, say "HI" to ron for me.
steve.
p.s. if you get time, check out our new sealed surface(ontario1/8onroadracingclub.com)
Hi Steve,

Good to read that all is going well with you. Hope to see you at the next one.
Take care,
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Old 06-01-2006, 11:17 AM   #1398
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Default HI

Hey ron! thanks, just gettin my car ready for the mid-west race in toledo this weekend, see ya's at the GLC.
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Old 06-01-2006, 12:16 PM   #1399
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Default Just forgotten to post the images.

Here's the photo of the pinion.

Click here to see a visual comparison of the Delta hard coated pinions (left) and the stock mugen one (right). All two are the 17T one.
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Old 06-01-2006, 06:23 PM   #1400
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Any gearing ideas for a track that has a 140' straight a couple of nice sweepers and some tight stuff?? More of a 1/10 track but some of us are trying to run these big cars here!! Pic.s of the track here...(click on the CAI link and then on track link) http://www.edmontonrc.com/Pages/default.htm

Thanks,
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Old 06-01-2006, 06:52 PM   #1401
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You can drop down to the 16T for first gear for more pick up. The pics really don't show that much of the track though. Do you have any others?
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Old 06-01-2006, 08:47 PM   #1402
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Can someone explain the front roll center adjustment. What should I do to get more steering and why?
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Old 06-02-2006, 08:55 AM   #1403
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Never mind I found my answer
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Old 06-02-2006, 12:17 PM   #1404
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can you post you answer as i am curious as how to gain steering and the why part as well
thx
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Old 06-02-2006, 03:59 PM   #1405
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Default Ultra hard clutch spring.

Seems that Mugen has launched a new and stiffer clutch spring along their 'old' hard clutch spring. Here's the info:

http://www.mugenseiki.com/h0774e.htm

Heard about it on the MTX4 thread and looked about it. Let's see if it's much stiffer than the old spring.
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Old 06-02-2006, 04:13 PM   #1406
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Quote:
Originally Posted by HarKonnenD
You can drop down to the 16T for first gear for more pick up. The pics really don't show that much of the track though. Do you have any others?

Yes. Go to www.edmontonrc.com and go to the gallery link. You'll find pic.s of our indoor/winter facility as well as some more shots of the asphalt track.
John.
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Old 06-02-2006, 08:06 PM   #1407
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To lower the roll center= more traction
either lower the inner hingepin on the lower arm or
raise the upper arm inner hingepin.

Same rule applies to both ends of the car. It sounds weird but it's true.

So on the Mrx-4 put shims under the upper mount to lower the roll center and pick up some steering.
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Old 06-02-2006, 08:45 PM   #1408
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Thx

Will try it next race day

Lou
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Old 06-05-2006, 10:29 AM   #1409
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I took the MRX-4 out for its' maiden ride this weekend and couldn't get the car to shift into second? I had to loosen off the set screws that hold the balls so there was a little wigle of the shoes on the shaft (so the shoes wont rub on the bell housing...also had to sand the shoes a little as well), then I set the spring screws as per instructions and then proceeded to bak them out a 1/4 of a turn until they were almost backed all the way out....still only first gear?? Any ideas?
Thanks,
John
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Old 06-05-2006, 12:22 PM   #1410
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Quote:
Originally Posted by jjmudd
I took the MRX-4 out for its' maiden ride this weekend and couldn't get the car to shift into second? I had to loosen off the set screws that hold the balls so there was a little wigle of the shoes on the shaft (so the shoes wont rub on the bell housing...also had to sand the shoes a little as well), then I set the spring screws as per instructions and then proceeded to bak them out a 1/4 of a turn until they were almost backed all the way out....still only first gear?? Any ideas?
Thanks,
John
A few questions to better answer your question...I assume the engine is properly tuned? and not breaking in the motor...if the engine is not spinning at the proper RPM the 2-shoe 2nd speed will not engage. If OK, try this...

1.) Use silver or white paint to color the spring loaded screw head for one of the 2-speed clutch screws. (this will ensure you are making equal adjustments to each 2-speed screw)

2.) tighten the screws until they just fully collapse. Then turn each one out 2.5 turns...this will ensure the car is in first gear and difficult to get into 2nd.

3.) Set the spacing between the 2-speed clutch shoes and the 2nd gear bell by 0.5MM, using the center 2-speed clutch shoes set screws. Equal distance for each.

4.) Run the car under race conditions to adjust the engagment of the 2-speed. (Since we set the screws so tight, this will take a number of adjustments)

5.) loosen the two spring loaded clutch screws by 1/8 turn each time (one is now color silver or white for easy identification, even while the engine is idling) until the 2nd speed engages where you want on the track.

In the begining, be careful not to overrev the engine on a straight, since the 2-speed will be engaged in 1st gear. When you hear / see it not shift on the track, throttle back, bring it in and adjust the spring loaded screws.
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