Supercharger cog belt being constantly chewed

clkio · 01-25-2015, 07:25 AM

I have a stillen upgraded kit pushing 12.5 psi (cog, impeller). The belt cog is not centered on the idler pulley (pushing more on the pulley towards back of the car not front) and it's eating up cog belts (third belt in 2 weeks). I have it tensioned properly when I install it and as soon as I start the car, the belt shift all the way to the side, and when I drive it, it starts to rub against the side of the pulley and belt goes. Any help guys would be great? such a stupid problem to have especially since the car is running mint beside that. thx you

SouthArk370Z · 01-25-2015, 07:57 AM

Either the pulley needs to be shimmed or the shaft is bent.

clkio · 01-29-2015, 02:07 PM

Quote:

Originally Posted by SouthArk370Z

Either the pulley needs to be shimmed or the shaft is bent.

Great guess, it was BOTH! My tuner just called me back he said tensioner was bent and the pulley is being shimmed at the machine shop. Once he tests everything, I will report back here.

Nut_N_Much · 01-29-2015, 06:40 PM

He will have to clearance the timing plate cover to allow the tensioner pulley to spin freely. Use a file or grinding wheel, take 2 seconds.

PM'd you

Nut_N_Much · 01-29-2015, 06:52 PM

Nothings bent or needs shimmed.
1. The bracket the Vortec Supercharger is mounted on bends when it gets bolted on to the face of the motor. The front of motor is not flat its concave.
2. Adjust it all you want on a bench when you mount it, the tension will change.
3. To get the tension set right the tentsioner pulley will hits the timing plate.
4. Yes you can cut a grove into the timing plate were the seam is to get clearance and it will not cause leak or damage your motor.
5. Tension Shaft isn't bent it flexes, grade 5 bolt; its just a bolt and nut holding a adjuster shaft that can't be access after Supercharger is mounted.
6. I used the same size COG as you did, then switched to the one Osirus shows you. I bolted it to a drill and uses a file to clearance it from the suspension bolt on the fender well.

This isn't an issue with the stock kit because pulleys and tensioner have 1/4 lip on them. I PM'd you my phone number give it to the shop if they need any help. I have done a lot of work on Stillen Kits.

clkio · 01-29-2015, 07:15 PM

Quote:

Originally Posted by Nut_N_Much

Nothings bent or needs shimmed.
1. The bracket the Vortec Supercharger is mounted on bends when it gets bolted on to the face of the motor. The front of motor is not flat its concave.
2. Adjust it all you want on a bench when you mount it, the tension will change.
3. To get the tension set right the tentsioner pulley will hits the timing plate.
4. Yes you can cut a grove into the timing plate were the seam is to get clearance and it will not cause leak or damage your motor.
5. Tension Shaft isn't bent it flexes, grade 5 bolt; its just a bolt and nut holding a adjuster shaft that can't be access after Supercharger is mounted.
6. I used the same size COG as you did, then switched to the one Osirus shows you. I bolted it to a drill and uses a file to clearance it from the suspension bolt on the fender well.

This isn't an issue with the stock kit because pulleys and tensioner have 1/4 lip on them. I PM'd you my phone number give it to the shop if they need any help. I have done a lot of work on Stillen Kits.

Got it, texted you bro

ANMVQ · 01-25-2015, 09:27 AM

When mine was eating them its wasn't a bent shaft. But it was over tight, Just remember that after the PM . If its over tightened it can, Bend the shaft tho.

clkio · 01-25-2015, 09:51 AM

I am tightening to the point were I can twist the belt to about 45 degrees with my thumbs, that's how I always done my belts and had no issues. Besides, when I had it less tight, the belt use to slip completely under WOT. I am gone check the shaft and see if I can see any bents. Mike you gave up all together bro? there has to be a solution.

clkio · 01-25-2015, 10:03 AM

Here another pic. You clearly see its rubbing on the right side of the pulley and it's shredding the belt.

Pro4Jackster · 01-25-2015, 10:46 AM

Is it getting most of the damage when you drive the car at WOT to redline? If you drive it for a few days with no hard pulls, does the belt stop shredding?

If so, your bracket may be flexing under WOT, and it causes your pulleys to be out of alignment temporarily. That was one of my problems. JTran made me this support and mine stopped shredding belts.

clkio · 01-25-2015, 11:31 AM

Quote:

Originally Posted by Pro4Jackster

Is it getting most of the damage when you drive the car at WOT to redline? If you drive it for a few days with no hard pulls, does the belt stop shredding?

If so, your bracket may be flexing under WOT, and it causes your pulleys to be out of alignment temporarily. That was one of my problems. JTran made me this support and mine stopped shredding belts.

INTERESTING! normal driving belt is fine, if i am reving her hard or driving her hard then it starts to happen. This could be the problem, I am going to drop the car off to my tuner tomorrow and have him check it out and see if that solves the problem. thx alot man

nomodsjk · 01-25-2015, 01:14 PM

That brace is brilliant!

nomodsjk · 01-25-2015, 01:15 PM

Op how much whp are you making with your set up?

swiss370Z · 01-25-2015, 02:25 PM

Hey Sir

When I look at your pictures to me,
I think that the belt does not fit the pulley.

Or the angle is not right 100%.
Verifiable the time.

Greetings
Ivo

Nut_N_Much · 01-25-2015, 02:35 PM

Yes, you will need to build a adjustable bracing arm. Osiris, Mine and a few others that have done the COG Swap also had to brace the SC. Ours ran from the side of the SC to a plate we bolted to the inner fender.

No need for a huge support like the one shown above. I used the caliper support from a Harley Springer Front End. I'll see if i still have pic's i can post.

Did you notch the block to clear the pulley.

01-25-2015, 07:25 AM	#1 (permalink)
clkio Enthusiast Member Join Date: May 2014 Location: Cambridge ON Posts: 265 Drives: 09 370z M6 Rep Power: 11	Supercharger cog belt being constantly chewed I have a stillen upgraded kit pushing 12.5 psi (cog, impeller). The belt cog is not centered on the idler pulley (pushing more on the pulley towards back of the car not front) and it's eating up cog belts (third belt in 2 weeks). I have it tensioned properly when I install it and as soon as I start the car, the belt shift all the way to the side, and when I drive it, it starts to rub against the side of the pulley and belt goes. Any help guys would be great? such a stupid problem to have especially since the car is running mint beside that. thx you

01-25-2015, 07:57 AM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Either the pulley needs to be shimmed or the shaft is bent. Jordo! likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

01-29-2015, 06:40 PM	#4 (permalink)
Nut_N_Much A True Z Fanatic Join Date: Dec 2011 Location: Pensacola Florida Posts: 1,696 Drives: Awesome Car Rep Power: 27	He will have to clearance the timing plate cover to allow the tensioner pulley to spin freely. Use a file or grinding wheel, take 2 seconds. PM'd you __________________ Did new cool science stuff to the car !!! http://www.the370z.com/mazoc/99606-z...y-14-17-a.html http://www.the370z.com/diy-section-d...-w-videos.html

01-29-2015, 06:52 PM	#5 (permalink)
Nut_N_Much A True Z Fanatic Join Date: Dec 2011 Location: Pensacola Florida Posts: 1,696 Drives: Awesome Car Rep Power: 27	Nothings bent or needs shimmed. 1. The bracket the Vortec Supercharger is mounted on bends when it gets bolted on to the face of the motor. The front of motor is not flat its concave. 2. Adjust it all you want on a bench when you mount it, the tension will change. 3. To get the tension set right the tentsioner pulley will hits the timing plate. 4. Yes you can cut a grove into the timing plate were the seam is to get clearance and it will not cause leak or damage your motor. 5. Tension Shaft isn't bent it flexes, grade 5 bolt; its just a bolt and nut holding a adjuster shaft that can't be access after Supercharger is mounted. 6. I used the same size COG as you did, then switched to the one Osirus shows you. I bolted it to a drill and uses a file to clearance it from the suspension bolt on the fender well. This isn't an issue with the stock kit because pulleys and tensioner have 1/4 lip on them. I PM'd you my phone number give it to the shop if they need any help. I have done a lot of work on Stillen Kits. swiss370Z, GaleForce and clkio like this. __________________ Did new cool science stuff to the car !!! http://www.the370z.com/mazoc/99606-z...y-14-17-a.html http://www.the370z.com/diy-section-d...-w-videos.html Last edited by Nut_N_Much; 01-29-2015 at 06:57 PM.

01-25-2015, 09:27 AM	#7 (permalink)
ANMVQ A True Z Fanatic Join Date: Mar 2011 Location: Framingham MA Posts: 2,732 Drives: 2014 Q50 AWD Rep Power: 19	When mine was eating them its wasn't a bent shaft. But it was over tight, Just remember that after the PM . If its over tightened it can, Bend the shaft tho. __________________ 14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

01-25-2015, 09:51 AM	#8 (permalink)
clkio Enthusiast Member Join Date: May 2014 Location: Cambridge ON Posts: 265 Drives: 09 370z M6 Rep Power: 11	I am tightening to the point were I can twist the belt to about 45 degrees with my thumbs, that's how I always done my belts and had no issues. Besides, when I had it less tight, the belt use to slip completely under WOT. I am gone check the shaft and see if I can see any bents. Mike you gave up all together bro? there has to be a solution.

01-25-2015, 10:03 AM	#9 (permalink)
clkio Enthusiast Member Join Date: May 2014 Location: Cambridge ON Posts: 265 Drives: 09 370z M6 Rep Power: 11	Here another pic. You clearly see its rubbing on the right side of the pulley and it's shredding the belt.

01-25-2015, 10:46 AM	#10 (permalink)
Pro4Jackster Base Member Join Date: Oct 2011 Location: NW Houston Posts: 130 Drives: '08 350Z Rep Power: 14	Is it getting most of the damage when you drive the car at WOT to redline? If you drive it for a few days with no hard pulls, does the belt stop shredding? If so, your bracket may be flexing under WOT, and it causes your pulleys to be out of alignment temporarily. That was one of my problems. JTran made me this support and mine stopped shredding belts. JARblue, DEpointfive0, Leroydsouza and 2 others like this. __________________ Jtranbuilt '08 Z [Jtran PT7075 Single - Fujitsubo - Transgo - Wilwood - TE37SL - BC Racing]

01-25-2015, 01:14 PM	#12 (permalink)
nomodsjk Premium Member Join Date: Apr 2014 Location: martinsburg wv Posts: 2,073 Drives: 2011 370z MB/7at Rep Power: 19962	That brace is brilliant! swiss370Z and elperuano like this.

01-25-2015, 01:15 PM	#13 (permalink)
nomodsjk Premium Member Join Date: Apr 2014 Location: martinsburg wv Posts: 2,073 Drives: 2011 370z MB/7at Rep Power: 19962	Op how much whp are you making with your set up?

01-25-2015, 02:25 PM	#14 (permalink)
swiss370Z Track Member Join Date: Jun 2011 Location: In the Mountains Posts: 649 Drives: VW UP! 1.0 Ltr Rep Power: 15	Hey Sir When I look at your pictures to me, I think that the belt does not fit the pulley. Or the angle is not right 100%. Verifiable the time. Greetings Ivo __________________ /// ONE LAST RIDE /// R.I.P. FAIRLADY Z ///

01-25-2015, 02:35 PM	#15 (permalink)
Nut_N_Much A True Z Fanatic Join Date: Dec 2011 Location: Pensacola Florida Posts: 1,696 Drives: Awesome Car Rep Power: 27	Yes, you will need to build a adjustable bracing arm. Osiris, Mine and a few others that have done the COG Swap also had to brace the SC. Ours ran from the side of the SC to a plate we bolted to the inner fender. No need for a huge support like the one shown above. I used the caliper support from a Harley Springer Front End. I'll see if i still have pic's i can post. Did you notch the block to clear the pulley. Jordo! likes this. __________________ Did new cool science stuff to the car !!! http://www.the370z.com/mazoc/99606-z...y-14-17-a.html http://www.the370z.com/diy-section-d...-w-videos.html

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