Procharger belt size?

[Mbutler183]

Currently on a p1x ho kit 3.75 pulley, swapping to a 3.25 pulley. Is there a calculator anywhere to determine what belt size I'll need?

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[Mbutler183]

Any ideas?

 

[silverbullet85]

I would call procharger and ask tech

 

[LSchicago]

Don't know HO kit sizes, but Procharger will be able to help you out. Will be roughly an inch smaller than the one you have now or so.

 

[Mbutler183]

Yeah, looks like I'll need to figure it out. Emailed procharger twice and called, no response. PM'd procharger on here, no response. That was before creating this thread

 

[TRP45ACP]

Yeah, looks like I'll need to figure it out. Emailed procharger twice and called, no response. PM'd procharger on here, no response. That was before creating this thread

If you call procharger during business hours, ask for tech. They will transfer and you should be able to get the belt part number needed. I have done it three times as I have pulleyed down my car. No issue.

 

[Keo_S550]

Ive asked them the same question and they will suggest that you should go to a stage 2 bracket system rather than pulley down that far. I’m currently on a 3.4 making around 15lbs and my tuner suggests I don’t go over 16 because that’s where most of the issues of valve float or lifting the head begins. I can tell you tho that I have thought about doing that. But it’s more effective to look at other things engine wise to get more power than just a simple pulley swap. Ported intake? Weight reduction? Headers? MAK inlet? Stuff like that

 

[Jackson1320]

Ive asked them the same question and they will suggest that you should go to a stage 2 bracket system rather than pulley down that far. I’m currently on a 3.4 making around 15lbs and my tuner suggests I don’t go over 16 because that’s where most of the issues of valve float or lifting the head begins. I can tell you tho that I have thought about doing that. But it’s more effective to look at other things engine wise to get more power than just a simple pulley swap. Ported intake? Weight reduction? Headers? MAK inlet? Stuff like that

You don’t need to pulley down you should get a overdrive balancer. I have a 20% overdrive balancer and a 3.7 pulley. Planning on a 3.5 soon. I have ran more than 16psi without issue on a stock Coyote. I’ve never heard of valve float issues with a centrifugal supercharged coyote just turbos. What causes the float?

 

[Keo_S550]

You don’t need to pulley down you should get a overdrive balancer. I have a 20% overdrive balancer and a 3.7 pulley. Planning on a 3.5 soon. I have ran more than 16psi without issue on a stock Coyote. I’ve never heard of valve float issues with a centrifugal supercharged coyote just turbos. What causes the float?

Im glad you have had no issues running over 16lbs on a stock motor, but just because you have doesn’t make it a good idea. I just follow what my tuner tells me to do or not to do. If they say shit starts messing up over 16lb then I believe them.

 

[Jackson1320]

Im glad you have had no issues running over 16lbs on a stock motor, but just because you have doesn’t make it a good idea. I just follow what my tuner tells me to do or not to do. If they say shit starts messing up over 16lb then I believe them.

I understand that. I’m just saying that I personally had no problems at over 16psi. What valve float issue comes with 16psi on a centrifugal?

 

[Mach1soldier]

3.75 x 3.14. =11.77
3.25 x 3.14. =10.20

so basically a 1.5 inch shorter belt

 

[mangosmoothie]

3.75 x 3.14. =11.77
3.25 x 3.14. =10.20

so basically a 1.5 inch shorter belt

There isn't 100% belt wrap. More like 50%. so probably a .75" shorter belt.

 

[Mach1soldier]

That’s a good point.

 

[LSchicago]

There isn't 100% belt wrap. More like 50%. so probably a .75" shorter belt.

It's actually closer to 70% around, so about a inch. Belts are not available in all lengths, but usually go down about an inch at a time.

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