In Need Of Some Knowledge On Pulley's

Cmc3567

Member

Dec 9, 2015

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8

Louisiana

Mar 10, 2017

#1

• Mar 10, 2017

• #1

I have a super charged 98 mustang and ready to get some pulley's read alot of forums of belt slipping and shredding heard under drive pulleys are a waist with charging problems what would the best pulley set up be for my application should I stay stock and also what would be a sufficient rib thank for the I put ahead of it would be greatly appreciated

 

Dark04GT

10 Year Member

Apr 27, 2008

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Mar 11, 2017

#2

• Mar 11, 2017

• #2

With some baseline information and your goals people can show you all sorts of setups.

Example: supercharger type, crank pulley size, supercharger pulley size, shift rpm, forged motor?, heads/cam/compression?

With that information you can make some calculations (this is a vortech s/c calc): https://vortechsuperchargers.com/pages/impeller-speed-calculator

 

squeak93

15 Year Member

Jun 2, 2005

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Mar 11, 2017

#3

• Mar 11, 2017

• #3

Use parts from an 05-09ish e250 with a 5.4 for factory 8 rib Ford pulleys. 6.70 stock lower and 3.2 upper on a procharger is 15+ for me. Forged motor. Hci. Etc.

 

squeak93

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#4

• Mar 11, 2017

• #4

 

squeak93

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#5

• Mar 11, 2017

• #5

The factory idler was too big for the 96-99 cover. I had to buy a 75mm upr 8 rib idler.

 

squeak93

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#6

• Mar 11, 2017

• #6

Also I'm a procharger car so my blower ratio is higher. You'll need a smaller upper or larger lower to make the same boost. It's usually best to do a bigger lower for belt wrap and slippage.


Also I had to go with the pricey thumper rr as I was kicking and shredding belts when 6 rib with a factory tensioner. Even broke a brand new stock one in less than 200 miles.

 

Noobz347

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Mar 11, 2017

#7

• Mar 11, 2017

• #7

Gotta bullet proof that stuff on street cars. IMO, reliability is first, cost is 2nd, and HP is third. Priorities would change if it were a track car.

 

Cmc3567

Member

Dec 9, 2015

38

1

8

Louisiana

Mar 11, 2017

#8

• Mar 11, 2017

• #8

Here's my build 97 4.6 put in a 98 GT tore engine down hone out cylinders for the stock bore bought the eagle forge rotating assembly pistons,rods,and Crank pistons are -17cc compression should be 9-7-1 bought the MHS twisted wedge heads with custom grind stage 2 cams also index high volume oil pump and pickup with 7qt moroso oil pan all new ARP bolts and head studs waiting on the Kenny Belle mammoth not sure of the size of the pulley but it was sold as a kit with fuel injectors and rails was thinking about buying the 8 rib harmonic balancer off of mod max but can't find factory 8 rib pulley's for ever thing else anything else you need no it is a street car thank you for your response

 

squeak93

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Mar 11, 2017

#9

• Mar 11, 2017

• #9

I listed all the pulleys above you need. They fit perfect in my 98 and they should as well for you. The exception was the idler. I had to buy a pricey upr 75 mm as the Ford one listed is 90 and too big. You do have to clearance your front cover but only a little. I'll try to find a pic of mine after being modified.

 

squeak93

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Mar 11, 2017

#10

• Mar 11, 2017

• #10

Here you go. You have to trim the support ribbing to clear the bigger rib pulley.

 

Dark04GT

10 Year Member

Apr 27, 2008

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Mar 11, 2017

#11

• Mar 11, 2017

• #11

Cmc3567 said:

Here's my build 97 4.6 put in a 98 GT tore engine down hone out cylinders for the stock bore bought the eagle forge rotating assembly pistons,rods,and Crank pistons are -17cc compression should be 9-7-1 bought the MHS twisted wedge heads with custom grind stage 2 cams also index high volume oil pump and pickup with 7qt moroso oil pan all new ARP bolts and head studs waiting on the Kenny Belle mammoth not sure of the size of the pulley but it was sold as a kit with fuel injectors and rails was thinking about buying the 8 rib harmonic balancer off of mod max but can't find factory 8 rib pulley's for ever thing else anything else you need no it is a street car thank you for your response

Click to expand...

Kenne bell has robust tech reading on all of their systems on their website. They have the answer already for you and kenne bell has an 8 rib kit so that you don't void your warranty. From the sound of your build you are likely going to be above the threshold that kenne bell recommends an 8 rib. I would read this:
http://www.kennebell.net/KBWebsite/Common/pdfs/46gtTechTips26L.pdf

After you read it, if you have any concerns because your motor is from a previous year then I would give kenne bell a call to ask if there are any considerations for your year.