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RC10B4/T4 Forum

Old 02-17-2009, 07:07 AM
  #6931  
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Originally Posted by chedda bob View Post
yes, but the difference i have yet to personally notice as i have ran the hubs in the past and the block now
Whats the clearence like between the shock spring and the camber link with these new blocks? I know with out the newer blocks (stock), the clearence is REALLY close.

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Old 02-17-2009, 07:08 AM
  #6932  
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Originally Posted by djzipper View Post
Would it lengthen or shorten the wheelbase? And could you combat the effect by adding or removing washers at the rear hub?
I believe blocks would shorten the wheel base (front to back).

Jason K.
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Old 02-17-2009, 07:22 AM
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Originally Posted by brickshouse View Post
I just bought me a t4, ive been out of the game for a while and was wondering what stock motor would best suit me for offroad racing. There are two staightaways, about 100ft, the rest is turns and jumps?? Too many damn options!!!!
Any 13.5 will keep you in the game, but I personally like the tekin 13.5 by far. Like I said this is just my opinion, my truck is geared 81/28 and I could have probably went up one more tooth but I was working on my setup and tires. Good luck!!
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Old 02-17-2009, 07:24 AM
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Originally Posted by Daniel Sarfati View Post
A few pages back there was a discussion about drilling new 4th holes in the rear t4 towers. Is this a common setup/mod? Thanks for any info
I second this. What does bringing the top of the shocks in to a 4th hole accomplish. Does it give it more side bite? and more foward traction?
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Old 02-17-2009, 10:08 AM
  #6935  
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Hi, just checking, a 21T pinion with a 19T super stock motor on the B4 will be fine yes?
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Old 02-17-2009, 11:06 AM
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Here is a pic of my ride,
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Old 02-17-2009, 12:49 PM
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I got one each of the new 75 and 72 tooth spur gears
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Old 02-17-2009, 03:06 PM
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Originally Posted by jjkahler View Post
I believe blocks would shorten the wheel base (front to back).

Jason K.

yes, the blocks shorten the wheelbase.... will you notice anything, i HIGHLY doubt it because the amt is soo small. but to answer the above question, yes you can combat it by moving your hubs back one spot.


i personally run on decently high bite clay and with my blocks i run the hubs forward still on the b4 and the hubs middle on the t4.... i didnt change either car
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Old 02-17-2009, 05:40 PM
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Originally Posted by jjkahler View Post
I believe blocks would shorten the wheel base (front to back).

Jason K.
Originally Posted by chedda bob View Post
yes, the blocks shorten the wheelbase.... will you notice anything, i HIGHLY doubt it because the amt is soo small. but to answer the above question, yes you can combat it by moving your hubs back one spot.


i personally run on decently high bite clay and with my blocks i run the hubs forward still on the b4 and the hubs middle on the t4.... i didnt change either car
What they said.

Yeah it will change the cars handling, but like you said it might not really be enough to notice, but it is an issue to look into as handling will be effected slightly.
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Old 02-17-2009, 09:04 PM
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Another question besides the one about the 4th whole, also does anyone know the diff in running 32.5 in front and 27.5 in the rear. The set up calls for 35 in front and 30 in the rear.
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Old 02-18-2009, 01:48 AM
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That will absorb sharp-edged small bumps better but will blow through the suspension travel faster on landings after larger jumps. It will also allow faster weight transfer.
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Old 02-18-2009, 03:38 AM
  #6942  
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Post Help 17.5 spur and pinion problem

hey im new to rc and hav a b4

was wondering how i can get a smaller pinion to gear my 17.5 properly
i hav a turbo hub and im running 66 spur with a 31 pinion and a 30 pinion is just alittle to small (it just touches the spur gear) is there any way i can modify my buggy or something that i can buy that will make a 30(or less) pinion work?

i run on a small track with lots of tight corners and jumps so im looking for fast acceleration more than high top speed.

any help would be great...

cheers
-Dirk
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Old 02-18-2009, 03:39 AM
  #6943  
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get a bigger spur. Its the same as getting a smaller pinion, speed-wise.
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Old 02-18-2009, 05:45 AM
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Originally Posted by Midnight View Post
Another question besides the one about the 4th whole, also does anyone know the diff in running 32.5 in front and 27.5 in the rear. The set up calls for 35 in front and 30 in the rear.
Losi oil runs slightly thicker than Associated. Losi 32.5wt is actually about the same as associated 35wt and Losi 27.5 like AE 30. You wouldn't notice a difference if you switched unless you're a very experienced driver.
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Old 02-18-2009, 06:17 AM
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Originally Posted by D1rk_B4 View Post
hey im new to rc and hav a b4

was wondering how i can get a smaller pinion to gear my 17.5 properly
i hav a turbo hub and im running 66 spur with a 31 pinion and a 30 pinion is just alittle to small (it just touches the spur gear) is there any way i can modify my buggy or something that i can buy that will make a 30(or less) pinion work?

i run on a small track with lots of tight corners and jumps so im looking for fast acceleration more than high top speed.

any help would be great...

cheers
-Dirk
You'll want to run approximately a 6.5 final drive ratio. The B4 has an internal gear ratio (IGR) of 2.6:1.

If you used a 78t spur and 30t pinion you would have a 6.76 final drive ratio giving you an appropriate starting point. This means the pinion will have to turn 6.76 times for every full rotation of the tire.

The formula for calculating final drive ratio is ((spur / pinion) * IGR). So in this case ((78 / 30) * 2.6) = 6.76

-Jeff
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