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Old 05-06-2004, 08:14 AM   #2746
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I noticed last year when I was racing a stock R40 that was build using the factory diff lub which I beleive is 30000 I could roll down a 170ft straight and let off just a little and then roll thru the corner with the throttle wide open. When I went to the one-way that didnt happen. It pushed some kinda fierce.


Goldenboy,
The only person that i know running an R40 at oth right know is Nigel. Of course I have not made it out this year yet dew to a new work schedule.
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Old 05-06-2004, 03:44 PM   #2747
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Well I started building. Any good mods that you guys have done to your R40 that are worth trying before I get this thing all the way together.
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Old 05-06-2004, 03:55 PM   #2748
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Quote:
Well I started building. Any good mods that you guys have done to your R40 that are worth trying before I get this thing all the way together.
there are a couple of mods that you can do to make it lighter..... before you get on the upperdeck, if you want, you could do something with the electronics, people have been cuttin away the batter box, and then not using the reciever case and just mounting it wherever it works the best. because it is a real pain to try to get your wires throught he batterybox and then through the reciever box and into your reciever. ....... also you might want to install the lighweight tranny shafts before you get it all together.
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Old 05-06-2004, 05:37 PM   #2749
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Well I was thinking of reworking the battery box and reciever location. I was also going to trim up the upper deck where the reciever would be mounted and make it a bit more flush with the rest of the deck.

I am also going to use Low profile Futaba servos for the steering and throttle. I have found that there are less problems with the steering servo when you use the low profile. It doesnt stick out of the side of the car as much. They also weight a bit less. You can also lower you CG slightly buy using the low profile servo on you throttle. You just mount it under the deck instead of on top.
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Old 05-06-2004, 06:42 PM   #2750
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Another quick question. Does anyone know if the Yokomo Aluminum Hex adapters will fit the R40. I know the R40's are 6mm but I am not sure about the Yok.
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Old 05-06-2004, 07:05 PM   #2751
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actually the directons for installing the one way says to use 50,000 wt oil but i use like proteus use 10,000 with the four gear diff, and the one way in front of course.
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Old 05-06-2004, 07:06 PM   #2752
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have the gt4, so i checked real quick... but i have the plastic ones not the aluminum, but i think they would be the same... and they dont fit. the part of the shaft where the pins go's through is too small, so it is probably 5 or 4 mm. but maybe the alum. ones will work
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Old 05-06-2004, 07:11 PM   #2753
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does using 10k in the rear diff give more or less steering with 1 way

also i am using the 2 gear diff if it matters

we should call this the MD,VA, DC r40 thread lately
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Old 05-07-2004, 12:16 AM   #2754
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Quote:
Originally posted by PTP Racing
does using 10k in the rear diff give more or less steering with 1 way

also i am using the 2 gear diff if it matters

we should call this the MD,VA, DC r40 thread lately
10K will give it more steering as opposed to 30 or 50K, according to xxxmain.

(now you cad add NC to the MD, VA, DC list )
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Old 05-07-2004, 06:24 AM   #2755
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i may need to try that

do you think that would help me carry more speed through the corners?
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Old 05-07-2004, 07:21 AM   #2756
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Quote:
Originally posted by PTP Racing
i may need to try that

do you think that would help me carry more speed through the corners?
It should, but it will also effect your car's handling thru the corners slightly. I'm still trying to "master the front one way", since it effects everything that I'm used to when trying to get around a corner. I'm debating whether to go back to a 2 gear front diff and play around with diff oils or keep practising with the one way. Guess it will depend on how frustrated I get
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Old 05-07-2004, 11:04 AM   #2757
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PTP, going to a lighter rear diff should give you less on power steering.
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Old 05-07-2004, 12:03 PM   #2758
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rear diff fluid is strange ive noticed

in my mtx3 the 10k stock set-up had too much rear bite 30k seemed to bring the balance to the right point

but ive heard thicker oil is used to slow steering response when reading

thats the reason i was confused

im going to stick with the 30k im using because adding rear bite would definetly not help me

see you tommorrow NCC i will be there around 2pm make sure they sign me up
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Old 05-07-2004, 04:49 PM   #2759
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PTP I agree with the others. Shedding the weight wont gain you 1 second per lap, more like mayby .1 to .2 depending on your layout. Your MT12 may well be holding you back if you are on throttle a lot. At one of my tracks you are on throttle mayby 40% of the lap, so motor is not a huge deal. At another you are on throttle 75-80% so you need horsepower.

However if you are 1 second behind, and you say you are driving good lines and not crashing I would be looking at corner speed. A stable car can feel fast, but in fact be slower. The other tricky thing is the oneway. You can really overdrive them and not realise it. Experiment with lines and try to increase corner speed. You are probably either too aggressive or not aggressive enough.

Also try less thick shock oil, around 40 works nice. Adds more response. 37 shore tires will slow your car down unless you really need the grip, try 40s if your track has the grip. Also add 2mm of spacers under the outer rear camber links. This will loosen the rear and make the car rotate harder.
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Old 05-07-2004, 05:51 PM   #2760
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the 10 gives you less steering than the 30
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