d4man

iTrader: (5)

I run a 13.5 BL in stock and the only advantage is the acceleration. Before I got brushless, I beat brushless guys. Coming out of corners, brushless is real fast but with the correct gearing brushless's top speed should be about the same as brushed.

In my T4 I used to run a 19t pinion with a CO27. With the Orion 13.5 and LRP Sphere, I run 23 tooth pinion and my motor isn't even slightly hot. I think I can go up one more tooth when I get LIPO.

Wild Cherry

another way


You can bump the timing up ...

mig rod

Slightly modified with a 15 turn motor , I make people cringe when they see I mostly use it for bashing. this baby can Jump!

KJT4

I just added a B4 to my arsenal last night. I cant wait to race it.

17nut

iTrader: (60)

nice b4 man

KJT4

I just bought the mamba max 4600 system for my B4. Is anyone running this setup and if so how do you like it?

speedsterblade

I confirm... but 1.1grams lighter on my scales. They are lighter...and your dropping ~2grams of rotating weight. Is it noticable?...maybe, maybe not mod prolly not so much, stock or 19t turn class more so. In theroy it definitely does make a difference and I do run them.

white03

The less rotational mass = better accelleration. Is the slipper plates worth it? In theory yes but track time is where you'll see the difference, espically in stock class. Where I race, stock class is very competitive. I run a FT T4 with a CO27, Novak GTS/w larger power cap. and a good set of matched 4200 NIMHs. I run with the best drivers at my track. Truck has no other mods.

Wild Cherry

The stock slipper & out drives weight more thus they deliver more traction ,with less wheel spin ....

speedsterblade

Yep, yep. and then add the FT outdrives...Think i got my weights backwards, I think the FT outdrives are 1.1 grams lighter each or both..I don't recall, slipper pads 1gram..either way, 3-4 grams ligther, less rotating mass, if using both has to make a noticable difference in acceleration..worth the money?...prolly not for a mod class/motor. but I have both installed in my t4 (mod) and b4 (19t/10.5 class).

if you really want a 'Pro' transmission buy the trinity plates, FT outdrives and get ceramic bearings throughout...especially in the diff. not cheap but if I was running a stock class and wanted every edge I could get, I'd look into the cost of the ceramics.. I saw some ceramic diff balls on tower for 18$ verus the 12$ carbide balls.

My 2¢

chewiefttc4

iTrader: (27)

lighter might mean less rotating mass but it also looses momentum in the corners.. but hey.. PUNCH IT~!!!!

speedsterblade

True on dirt, more total weight over the tires would = more traction....but why not lighten the drivetrain all you can to get quicker spin up/accleration, then you can either add lead or buy other alumium parts to get more 'useful' weight. That is my thinking anyways... Dropping rotating weight is always preferred over 'dead' weight. For example, sportbikes; one of the first upgrade to a stock bike to set it up for racing is to replace the 530 chain and sprockets w/ a 520 (a narrower chain)...not sure of the weight difference but say it's 1-2 lbs...the motor has less work to do w/ a lighter drivetrain and to me 1-2 lbs off the drivetrain is better than dropping 3-5 lbs of dead weight (like race body work).. you'll notice the increase accleration but may not notice the 5 lbs dropped with a lighter body.

I won't get into the gyrospopic effects in great detail..not sure on 4 wheels if it matters that much but think about this... a spinning top, kids toy. say 1 top weighs 1lb. and you have another, same size that weights 5lbs. spin them both up to the same rpm. Guess which one you can get tilted off it's axis easier (turn not spin)...it aint the 5lbs one. This is a big on 2 wheels when you have to go through a chicane at 90mph and move the bike off it's axis of rotation...that is why honda for example boosted they dropped 17grams of wieght off each wheel when they introduced the cbr954 to replace the cbr929. Trust me you want the lightess drivetrain/less rotation mass you can find. IMO.

My 2¢.

Wild Cherry

Sounds just fine in theory, lighter...
but

more wheel spin is the result when you go lighter ....


Try both ways and discover for your self ....

The extra rotational mass has smoother acceleration and then there`s the extra traction from the weight....

speedsterblade

I didn't read your sig til now.. Chewie.. you must be the guy at Thunder in Nashville about a month ago with the rc8electric. Only if all those smokers would convert! lol. it was sweet to see you smoke'n up the smokers! Sweet car.

AaronR

iTrader: (113)

I removed and sold my Airtronics 94360 steering servo from my B4 a couple months back and am replacing it soon with a JR Z590 (I know, I know, down-grade!). The manual does not list the Z590, but it does list the Z550.

What spacer do I need for this servo? thin or none? I already have the J horn, so we're good there. Thanks for the help if you can.