Belt Slip! Help!

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Roblu98

Member

Oct 9, 2007

94

0

16

East Fallowfield, PA

Aug 28, 2008

#1

• Aug 28, 2008

• #1

I got my car dynoed. The numbers were low (373rwhp 365rwtq) for my setup. (see signature) The car was only pulling 6# of boost at 6,000 rpm with a 3.25" pulley. I think that the belt is slipping bad. Alot of belt dust. I am running 113" Gaterback, but that is the size vortech recomends with a 3.6" pulley. I am wondering what size belt i should be using with a 3.25" pulley?

 

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Roblu98

Member

Oct 9, 2007

94

0

16

East Fallowfield, PA

Aug 29, 2008

#2

• Aug 29, 2008

• #2

Anyone!

 

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spederman

Member

Apr 13, 2005

732

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16

Aug 29, 2008

#3

• Aug 29, 2008

• #3

Damn thats way to long of a belt for a 3.2 pulley. I'm surprised it doesnt throw the belt off.

I was using Gates belts when i had my 6 rib setup and with the 3.6 pulley i used a xxx1080. When i went to a 3.2 pulley, i went with xxx1075. I think it tried the xxx1073 but it was too small.

 

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Roblu98

Member

Oct 9, 2007

94

0

16

East Fallowfield, PA

Aug 29, 2008

#4

• Aug 29, 2008

• #4

spederman said:

Damn thats way to long of a belt for a 3.2 pulley. I'm surprised it doesnt throw the belt off.

I was using Gates belts when i had my 6 rib setup and with the 3.6 pulley i used a xxx1080. When i went to a 3.2 pulley, i went with xxx1075. I think it tried the xxx1073 but it was too small.

Click to expand...

I believe that 99 and 02 have two different belt configurations. That is why your belt is so much smaller. I think I am going to try a 112" belt to see if that helps.

 

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rconaway

Founding Member

Nov 11, 1999

1,415

3

39

Phoenix, Az.

Aug 31, 2008

#5

• Aug 31, 2008

• #5

The boost number is too low. The horsepower is okay for that level of boost but I would confirm the boost gauges are working correctly also. Make sure you don't have some kind of vacuum leak.

 

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Roblu98

Member

Oct 9, 2007

94

0

16

East Fallowfield, PA

Aug 31, 2008

#6

• Aug 31, 2008

• #6

rconaway said:

The boost number is too low. The horsepower is okay for that level of boost but I would confirm the boost gauges are working correctly also. Make sure you don't have some kind of vacuum leak.

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I am sure the the boost gauge is correctly. I think to do not have a vacuum leak. If i did I think I would get a CEL and the car would run like crap, which it is not. I am getting a lot of belt dust and when I shift the hard it falls on its face. I am going to try a smaller belt. If it is not that It could be my bypass Valve.

 

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rconaway

Founding Member

Nov 11, 1999

1,415

3

39

Phoenix, Az.

Aug 31, 2008

#7

• Aug 31, 2008

• #7

You could have bearings failing also in the blower. However, I had to replace 2 blow off valves. We moved my blowoff valve between the blower and the intake which necessitated a larger blower.

 

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rconaway

Founding Member

Nov 11, 1999

1,415

3

39

Phoenix, Az.

Aug 31, 2008

#8

• Aug 31, 2008

• #8

Ignore my last post:

You could have bearings failing also in the blower. However, I had to replace 2 blow off valves because they were fluctating and wouldn't hold pressure. We moved my blowoff valve between the blower and the intake which necessitated a larger blowoff valve later to solve some of the problem of downshifting and the stall factor of the impeller blade when that happens, which causes belt wear.