rcg33k

The topic and the difference is so insignificant that you shouldn't concern yourself about it.

jamminnay

iTrader: (11)

please inform me on how my comment was insignificant?

He asked for the facts on vented and unvented clutch bells.. It is a fact that bearing life is increased by running a vented clutch bell

cjm1126

iTrader: (163)

i think the vented bells keep the clutch cooler which will make it more consistant during a race

Integra

iTrader: (8)

a Vented bell 10000000% helps clutch life....if you think a little peice of dirt is going to hurt a clutch shoe turning at 30+K you are sadly mistaken....ive ran vented bells since i found them a couple years ago and since running losi ive been drilling out my Stock bells to help keep the temps down....a non vented to a vented clutch will run at least 60-70degrees hotter...and Heat for is your worst enemy in a clutch.

rkhess

iTrader: (54)

sorry but i agree with the vented guys. the best point someone gave is you remove your fuel tank and you can see wear,burs,oil build up or spring falure
without removing motor for a club racer that saves alot of time when diagnosing a problem.

ive also temped both vented and unvented vented about 50 degs. cooler
one thing about vented is it does alow oil residue in from spilt fuel and front bearings witch does effect clutch engagement
just my opinion

jay568424

iTrader: (1)

i do have problem with the vented bell for our track, dusty and loose.
i found that cluch shoe life is to short, due to dust going inside the open parts of cluch bell, same with the cluch bell get rought due to loose dirt going inside on it, and the cluch spring cuts due to like shaving form dirts.
when i change to closed bell, i dont have any problem with it again.
by the way we are in cold season racing

Jordan Krupp

I like the idea of a vented bell and plan on cutting some in a stock Losi. I ran an Ofna vented bell with a Kyosho flywheel & clutch for the last two years on my 8ight and liked being able to see the shoes through the vents. I never had a problem.

Integra

iTrader: (8)

loose Dirt hurt a 7075/6061 clutch shoe and Steel spring.

tristyn

iTrader: (4)

I have been running vented clutch bells in my buggy and truggy for a couple of years with good results. Aprox. 3 yrs ago I bought my son a losi muggy(aka) clutch killer. I found that the vented clutch bell did not cure the problem but the clutch would run much cooler. The fix was the combination vented clutch bell and fioroni turbo slider. I have never had a clutch issue because of dust or dirt.

butch man

I ran the ofna 3 vent & loved them till buggys started going to big tooth count .I dont think they translated the pitch right once they go over 15 or something else changes. Maybe the ofna pitch was never right but it didnt make a difference with smaller tooth count IDK. I still use the ofna 3 hole vented bells with the cars that use 13-15 tooth bells & always had better luck with all aspects of the clutch. I will however never use their 4 hole vented bells as I have broken 2 & know 4-5 guys that broke those also a couple years ago,maybe a bad batch IDK but nobody I know uses those any more & none of us have had any problems with the 3 hole.

Integra

iTrader: (8)

the 3 vent Ofna is also Deeper then the 4 vent...making shimming easier.

Bill Wyatt

iTrader: (2)

okay since you asked I will share my experience...LOL


vented bells are lighter...on tight layout sticky tracks I like them because they give the motor more snap and they also seem to let it go back to idle faster for better and quicker braking (no clue why that is..I am guessing because the lighter clutch bell slows down faster as well)

non vented bells are heavier...I prefer them with the big grunty motors for larger more open tracks...it seems to tame the bottom end somewhat and lets it roll out smoother and keeps it rolling a little better.

on super dusty tracks I will use a closed bell to keep crap out just in case...plus dusty tracks are more than likely a loose track where a snappy clutch will just make it miserable to get up off the corners

vented and non-vented bells can be used as "clutch tuning" tools and both have plusses and minusses

robbdny

iTrader: (19)

Thanks guys I appreciate the feedback. Mitch, the owner of M2C has been after me to try his 4 shoe system; I will probably do that and try it with and without the vented bell.

NRGman

Ive had Ofna vented CB break on me, so i stick to unvented

rcg33k

Please, make it stop.