f*cking KB belt slip

[raiders03]

I give up. I am convinced that the KB with the 19PSI pulley will never not have slippage. I've tried nonslip pulleys, an idler pulley, and different belts. Nothing works. I am fed up.

 

[Jman20427]

Have you tried the 10 rib kit?

 

[coleman]

try a bigger lower & upper pulley... to attain 19 #s

 

[racerat]

I've never had belt slip with the KB.
3.5" upper/6lb lower, made 604rwhp

 

[RDSZ]

I been running 21psi boost with stock lower and kb upper with gatorback belt and idler pulley and no slip in fact my gauge reads 23psi at wot

 

[raiders03]

racerat
Did you ever have belt slip before this set up? I am thinking about trying the 9.1" lower with the 3.25" upper. Do you guys think this will solve the problem? I don't want to waste more money for something that is still not going to work.
RDSZ
u lucky bastard!

 

[racerat]

I had belt slip with the eaton, but never with the KB. I've only ever run one pulley combo with the KB.

 

[LTHL PSI]

I have an upper and Lower as well...No BElt slip whatsoever, infact like RDSZ i see more boost than i'm supposed too. Get yourself a lower.

 

[raiders03]

Is it a non slip upper?

 

[raiders03]

LTHL PSI
What combo do you have ? I just ordered a 9.1" (6 lb.) lower from Metco. Which upper pulley should I get and from who? Thanks guys

 

[wyd_trkr]

Originally posted by EatonLS-1s
LTHL PSI
What combo do you have ? I just ordered a 9.1" (6 lb.) lower from Metco. Which upper pulley should I get and from who? Thanks guys

EatonLS-1s, with this combo, 3.25" upper/4lb lower you should not have any slip whatsoever. We have the 3.25" Non-Slips in stock. 3.5" Non-Slip's are on backorder. check it out here:

http://www.southfloridapulleyhq.com/SFPH/cobra/ps_kb_nonslip_individual_pulleys.htm


:thumbsup:

 

[NukeX]

Cogs?

 

[raiders03]

OK now I am confused. Which pulley combo = what? What is equivalant to the 19 psi pulley? 9.1" lower(6 lb.) and 3.25 upper or the 8.8" (4 lb. lower) and the 3.25 upper..

 

[wyd_trkr]

Originally posted by EatonLS-1s
OK now I am confused. Which pulley combo = what? What is equivalant to the 19 psi pulley? 9.1" lower(6 lb.) and 3.25 upper or the 8.8" (4 lb. lower) and the 3.25 upper..

Really simple actually:

(Sizes below as shown using Stock Lower Crank Pulley)

3.5" produces (13 psi) - plus 6lb. Lower = 19 lbs. boost
3.25" produces (15 psi) - plus 4 lb. Lower = 19 lbs. boost!

:thumbsup:

 

[RedFire2003]

I had belt slip[ also but @ 21psi I then changed to a smaller belt and bammmmmm no slip all go! good luck! I run stock lower.

 

[raiders03]

WYD_TRKR
What size belt should I use for the 6 lb and 3.5 upper with a 100mm idler. Thanks

 

[LTHL PSI]

Eaton,

I have a KB 3.00 Upper with a Metco 4lb lower. I had a RR, but it destroyed belts I hear, so i went with the KB pullies, and have never looked back.

 

[stangin]

I used to schred a belt with just one dyno pull with the KB 2 1/2" upper pulley, stock lower with the KB. KB should not even sell the 2 1/2" upper pulley at all, just not enough surface area for the belt. With the 3.5 upper and 8 lb lower I am seeing about 22 or 23lbs with no slip at all. I also use the BF aux idler.

I think you have to change the alt pulley to slow it down with a 4lb or larger lower pulley, I did. See my mod's list below:

 

[wyd_trkr]

Originally posted by EatonLS-1s
WYD_TRKR
What size belt should I use for the 6 lb and 3.5 upper with a 100mm idler. Thanks

EatonLS-1s, if I am not mistaken, i think a 78" belt is what would work with that combination. "racerat" should know, he is running this setup.

 

[raiders03]

stangin
I am going with the 6 lb lower and 3.25 upper. Do you know what size alt. pulley i should get and where I could get one? Anyone know? Thanks guys