he is looking to run 13.5 4wd at the cactus classic. So I am fairly certain his plan is not to go slow. It is also a non boosted class. So he will need to run 13.5 with motor timing only. Gino. I would start where I said, then adjust for temps. I am sure you have all of the pinions and spurs to try stuff out. 13.5 4wd is just not super popular. But i plan to run 13.5 in my wheeler this weekend and I plan to start where I told you.

Yes that's much better, ratio. 30 75, run that on 17.5 blinky. But 8.5 mod motor with that ratio aauws, motor will Come very Hot

You can't compare a 2wd ratio with a 4wd ratio, 4WD has much more resistance

Hello guys, just got the Avid Triad Slipper kit and going to install them on my car. Also got the Avid spacer for the kit. Question, where do i place the Avid spacer on the Triad kit? Do you guys have pics on where do i place them? Thanks in advance. Cheers...

oh you most definitely can compare the two! The math used to figure out either car's FDR is the same...neither the 2wd or 4wd FDR uses resistance as a consideration...so yes you can compare the two. There are sooooo many variables for "resistance" how can you even begin to quantify such an animal??

As far as pinions...a 23/24 with 75 spur will be VERY slow with a 13.5. That's what I run on my 8.5 lolol. maybe with a TON of boost a 24/75 combo might work...but for sure not in blinky.

This is what AE recomends for the B4.2 (gearing will be VERY close for the b44, even with "resistance" taken into account, tire size is same, spur is same, pinion is same, diff's are same, etc.)

17.5 blinky = 32/75
17.5 w/boost = 23/78
13.5 blinky = 30/75
13.5 w/boost = 22/81
8.5 = 22/81

So yea.....

Makes sense, I don't think resistance would play a large factor, but one thing to consider with the B44 versus the B4 is that very little air flow will reach the motor in the B44. So heat will become a factor. The B4 motor is exposed so it can cool much easier than under a closed body. So you may have to sacrifice a couple teeth to keep the temps down. That being said I've run a boosted 7.5 with a 22/75 in my B44 when it was cool outdoors. So it really depends on the situation. Racing indoor now I can't come anywhere close to that ratio, nor do I need to.

i run 21/81 on my 7.5

so I just put a 13.5 in my car. well, a 29/81 does not fit....so yeah....I need a smaller spur. but until I pick one up, I just boosted it up for now. so I am 81/25 boosted.

Just FYI with a 75t spur, the minimum pinion is 22 teeth. But it looks like you'll be surpassing that. Haha

If you make the difference between boosted and blinky it's correct, but saying 8.5 30/75 (like in a post above) that's overkill.

7.5t, i run on indoorcircuits 20/81 with 10-20 degr turbo, no boost.

huh> we said 30/75 for "13.5", not 7.5. He is looking to run a wheeler in the 13.5 super stock class at the Cactus Classic. Its a real class, lol. He cant boost or use a lower turn motor.

I don't see anyone talking about using a 30/75 on an 8.5. We've been talking 13.5 blinky gearing for last couple pages. Then WC had to go and throw his usual BS into the mix and that's where the 8.5 gearing got brought up (because the ratio's he is recommending would be shit for a blinky 13.5, but normal for 8.5)

Super Stock 13.5 4wd Buggy is getting to be a normal class around here it seems (for indoor clay tracks) same with SS Truck and SS Short Course. I really like 13.5's I feel like those and 10.5's are the best all around motors.

Would be cool if there was more motor regulated classes IMO.
Stock = 17.5 blinky
Super Stock = 13.5 blinky
Mod = 10.5 blinky
Open/Pro = Anything

lol, way too many classes, lol. Anyway, I drive the motor I can handle. On my currently layout, I am not liking the 8.5. I can only use the speed on the straight. And the jumps are close together and a wheeler with a 8.5 is just harder for me to get right. We also have a tabletop jump with a crap ton of lift and it is way to easy to over power the jump and land in the fluff. Add to that my tires are getting destroyed. Tires are only lasting me 1-2 race days. And the guy that won the wheeler class last weekend ran a 13.5 boosted in a xxx-4 chassis. So its not like an 8.5 is a huge advantage.

Hi,

Have a read of this post:
http://www.rctech.net/forum/11740921-post2656.html

Image:

MiCk B. :-)

What rear arms are 2mm shorter?