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Old 08-25-2011, 11:58 AM   #2956
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Fred is totally right, but if all he recommended still did not get the weight low enough, get some tp4200 40c packs (263grams)!!!!!!!
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Old 08-25-2011, 12:01 PM   #2957
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Fred is totally right, but if all he recommended still did not get the weight low enough, get some tp4200 40c packs (263grams)!!!!!!!
Those packs are pretty stout in terms of performance for stock!! They will knock off about 40 - 45 grams as well!
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Old 08-25-2011, 12:05 PM   #2958
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I have them running my 3.5t tc4 in 6minutes mains no problem !.....
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Old 08-25-2011, 01:19 PM   #2959
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Is the extra punch from the battery worth being 40 grams overweight? I was still able to set fast lap of the night sitting at 1420 and not 1380 with my old pack. How many grams will I lose going to a LW body?
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Old 08-25-2011, 01:26 PM   #2960
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Is the extra punch from the battery worth being 40 grams overweight? I was still able to set fast lap of the night sitting at 1420 and not 1380 with my old pack. How many grams will I lose going to a LW body?
Lightweight bodies are around 20g less than the regular ones. I think most of the performance gain from lw bodies is due to the lower COG it gives the car.
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Old 08-25-2011, 01:42 PM   #2961
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Yes LW around 20g
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Old 08-25-2011, 01:44 PM   #2962
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how many teeth is on the main belt?anyone know?also im replacing my belt and i want to how tight it needs to be.thank you for any responses.
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Old 08-25-2011, 06:34 PM   #2963
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Just went through and replaced all the top deck screws with Titanium screws( 30 m3x6 screws purchased off ebay), shaved about 8 grams, replaced the rear ball diff with xray gear diff, that is about 5 grams lighter than the ball diff, Lightweight body and IP 5800 60c (290grams) batt, it all weighs 1380grams.
I am running spec-r gear diff in the front, replace that with xray gear diff or spool to and could save another 10 or 15 grams.
I switched to alloy wheel nuts from the kit steel ones, they are a couple of grams lighter.
I just switch from the RW racing pinion(6 grams) to a lightweight alloy pinion (2grams)
The car was about 20 grams overweight before, now I can play with chassis weights to get it properly balanced.
I am running Low profile savox servo, speed passion V3 17.5 with SP heatsink and fan, SP GT2 LPF speedy. Have not shortened any wires or any special like that. Our 17.5 class is 1400 grams min weight.
Speaking of which, I just go the hudy chassis balance pins, are there any tricks to using them? the car seems to swing wildly from one side to another,

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Old 08-26-2011, 02:29 AM   #2964
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how many teeth is on the main belt?anyone know?also im replacing my belt and i want to how tight it needs to be.thank you for any responses.
Start with the kit notch, the very bottom or top hole. After a few meets you will need to tighten it one notch. I have never need to tighten more than one notch.
I just bought a set of the zeppin racing belts of rcmushroom. $7 per belt. Cant argue with that value, they seem ok so far
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Old 08-26-2011, 12:52 PM   #2965
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Old 08-26-2011, 04:16 PM   #2966
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I don't think 17.5/13.5 blinky requires 5800mah to 6000mah. I run a tp3200 40c (208grams) in my tc4 Co27 against 17.5t cars, and have no problem keeping up for more than 6minutes...My tc4 is still overweight at 1465grams , but I won't try to make it any lighter since it can catch 13.5 blinky down the straight....the infield is another matter .....
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Old 08-27-2011, 02:41 AM   #2967
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Fred is totally right, get some tp4200 40c packs (263grams)!!!!!!!
Currently looking for some new Lipos - what are the tp4200's several of you are talking about?
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Old 08-27-2011, 03:03 AM   #2968
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front belt is 171 tooth
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Old 08-27-2011, 07:07 AM   #2969
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I don't think 17.5/13.5 blinky requires 5800mah to 6000mah. I run a tp3200 40c (208grams) in my tc4 Co27 against 17.5t cars, and have no problem keeping up for more than 6minutes...My tc4 is still overweight at 1465grams , but I won't try to make it any lighter since it can catch 13.5 blinky down the straight....the infield is another matter .....
I have an IP 4200 40c Lipo and it is markedly slower than my 5800 60c IP lipo.
You have to remember that is not just a capacity rating, but a peak discharge that the MAH rating calculates.
A 4200 40c batt will only discharge 4200 x 40 or 168 amps. 5800 x 60 will discharge 348 amps. A noticeable difference in punch and top speed. It all depends on who you race against and how much they are prepared to spend on batts to go quick
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Old 08-27-2011, 07:44 AM   #2970
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I have an IP 4200 40c Lipo and it is markedly slower than my 5800 60c IP lipo.
You have to remember that is not just a capacity rating, but a peak discharge that the MAH rating calculates.
A 4200 40c batt will only discharge 4200 x 40 or 168 amps. 5800 x 60 will discharge 348 amps. A noticeable difference in punch and top speed. It all depends on who you race against and how much they are prepared to spend on batts to go quick
That only matters if the motor is pulling a lot of amps from the battery.

Just because a battery CAN supply more juice, doesn't mean the motor is going to benefit from that if it's not pulling as much current.

For me, the higher C ratings are another way to keep temperatures in check on the battery, and allow me to run mod, on the few occasions that I do, without worrying about the battery being up to snuff.

For Blinky Spec classes, a 5800/6000 60c battery is a waste. You may benefit from the higher voltage at the end of the run [due to capacity], but buying based only on the C rating isn't going to do much. I would venture to say a 6000mAh 30c battery would be just as fast throughout a run.

If someone has something more than "it feels so fast" or "it's much faster than my other XYZ battery" in the way of proof [like voltage graphs over a run], I may change my opinion.

I'm not doubting that your 5800 is faster for you, but it's not due to C rating.
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