HPI R40 Nitro Car Forum
09-24-2004, 09:25 AM
#3916
LIghtweight battery - R40
I think I'll build a lighter battery pack for the R40 - possibly using the 800mAH - 850mAH AAA size packs ( with solder tabs ). This should save over 20 grams.
The AAA 800mAH w/ tabs don't seem to be readily available on the net.
Anyone know where to find either the single (tab) cells or the lightweight pack? Cost?
Thanks
The AAA 800mAH w/ tabs don't seem to be readily available on the net.
Anyone know where to find either the single (tab) cells or the lightweight pack? Cost?
Thanks
09-24-2004, 09:26 AM
#3917
Re: R40 - Weight Reduction Question
Originally posted by JAG Racing
OK - If you were to get only 2 upgrades, what are the best bang for the buck for weight reduction? Seems to me the 5-cell battery pack might be one. I did purchase a so-called light-weight chassis come to find out that the weight is identical to the stock chassis - not a lot of bang for the buck.
OK - If you were to get only 2 upgrades, what are the best bang for the buck for weight reduction? Seems to me the 5-cell battery pack might be one. I did purchase a so-called light-weight chassis come to find out that the weight is identical to the stock chassis - not a lot of bang for the buck.
On R40...you need more then 2, if you really want to be "ALL OUT" weight saving....
09-24-2004, 12:49 PM
#3919
Originally posted by coastaltony
Is the 2004 spec car available in the states?
Is the 2004 spec car available in the states?
Otheriwse, order that from www.rcmodel.com.hk or Jet hobby from HK, roughly $390 US shipped.
09-24-2004, 04:51 PM
#3921
Tech Elite
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Anyone know where to find either the single (tab) cells or the lightweight pack? Cost
09-27-2004, 04:24 AM
#3922
Tech Apprentice
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Re: R40 - Weight Reduction Question
Originally posted by JAG Racing
I did purchase a so-called light-weight chassis come to find out that the weight is identical to the stock chassis - not a lot of bang for the buck.
I did purchase a so-called light-weight chassis come to find out that the weight is identical to the stock chassis - not a lot of bang for the buck.
09-27-2004, 06:36 AM
#3923
Re: Re: R40 - Weight Reduction Question
Originally posted by BF
I just got my titanium screw set, so the standard chassis is 112g and the HPI light weight is 88g on my scales. I guess you bought an after market chassis
I just got my titanium screw set, so the standard chassis is 112g and the HPI light weight is 88g on my scales. I guess you bought an after market chassis
Thanks for the weight meaurement on that chassis- good to know.
09-27-2004, 12:16 PM
#3924
Re: Re: Re: R40 - Weight Reduction Question
Originally posted by JAG Racing
Yes - It was a GPM "lightweigth" chassis. Only benefit is a vent slot directly below the engine so the engine gets a little more air flow.
Thanks for the weight meaurement on that chassis- good to know.
Yes - It was a GPM "lightweigth" chassis. Only benefit is a vent slot directly below the engine so the engine gets a little more air flow.
Thanks for the weight meaurement on that chassis- good to know.
09-27-2004, 12:55 PM
#3925
4WD overdrive settings
Have any of you played with gearing ratios on front-to-rear drive ratios? I was considering going to a smaller gear on the mid-shaft. I would expect it to increase steering but I am sure there is a point of deminshing returns too.
Anyone find any Titanium pivot balls that would work on the R40?
Anyone find any Titanium pivot balls that would work on the R40?
09-27-2004, 12:59 PM
#3926
Re: Re: Re: Re: R40 - Weight Reduction Question
Originally posted by 20 SMOKE
How much was the GPM
How much was the GPM
Looks like Tower Sells the HPI lightweigth chassis for $75. Anyone know of a better price?
09-27-2004, 03:12 PM
#3927
Re: Re: R40 - Weight Reduction Question
Originally posted by BF
I just got my titanium screw set, so the standard chassis is 112g and the HPI light weight is 88g on my scales. I guess you bought an after market chassis
I just got my titanium screw set, so the standard chassis is 112g and the HPI light weight is 88g on my scales. I guess you bought an after market chassis
09-27-2004, 03:16 PM
#3928
Re: 4WD overdrive settings
Originally posted by JAG Racing
Have any of you played with gearing ratios on front-to-rear drive ratios? I was considering going to a smaller gear on the mid-shaft. I would expect it to increase steering but I am sure there is a point of deminshing returns too.
Anyone find any Titanium pivot balls that would work on the R40?
Have any of you played with gearing ratios on front-to-rear drive ratios? I was considering going to a smaller gear on the mid-shaft. I would expect it to increase steering but I am sure there is a point of deminshing returns too.
Anyone find any Titanium pivot balls that would work on the R40?
I used the GPM balls on the R40. I like them because they have the flats built into them for the adjustment clips.
09-27-2004, 03:28 PM
#3929
Re: Re: Re: Re: Re: R40 - Weight Reduction Question
Originally posted by JAG Racing
I got it in a trade - not sure. RC-Mushroom sells one for ~$32.
Looks like Tower Sells the HPI lightweigth chassis for $75. Anyone know of a better price?
I got it in a trade - not sure. RC-Mushroom sells one for ~$32.
Looks like Tower Sells the HPI lightweigth chassis for $75. Anyone know of a better price?
09-27-2004, 05:22 PM
#3930
Re: Re: 4WD overdrive settings
Originally posted by AMGRacer
Overdrive is best used on smaller tracks with tighter corners. The car is less consistent through faster corners and sweepers with overdrive. An overdriven front end will yank the car around tighter corners. Works nicely.
I used the GPM balls on the R40. I like them because they have the flats built into them for the adjustment clips.
Overdrive is best used on smaller tracks with tighter corners. The car is less consistent through faster corners and sweepers with overdrive. An overdriven front end will yank the car around tighter corners. Works nicely.
I used the GPM balls on the R40. I like them because they have the flats built into them for the adjustment clips.
Thanks AMGRacer. I think I'll do some experimenting on overdirve ...
Are these the pivot balls you are reffering to? GPM states they are steel... xo no weight savings.
http://www.gpmracing.us/index.cgi?pa...NRS4022A&c=130