Need help figuring out belt size.

[Slobanator]

Posted this on lightningrodder but not getting any help..

I know it's a lightning but I figured figuring belt size should be the same..

Searched the site and google and even read LFP and metco Motorsports belt guide but can't seem to find the info I need cause my belt size doesn't correspond to the chart recommendations.

I used these guides in the past on my 03 cobra and ended up with three wrong belt sizes. So maybe ill have time and money by simply making a post lol.

I'm installing my 6lb lower and need a belt.

So current belt number is K080670. Which I assume is a 67.0" belt size.

I have a upper that makes 10lbs with that belt now also a 100mm aux idler and the rest oem.



What belt size do I need with a 6lb lower with the upper pulley and 100mm idler???????????


Also trying to change the accessory/ inter belt too. Any one know what size that is???? I was told its 99" but want to double check.


Thanks in advance!!!!

Trying to source a belt today!

 

[4to8]

Whats upper pulley size ?

 

[Slobanator]

2.70.

Supercharger Belt Length Chart for 1999-2004 Ford Lightning & 2003-2004 SVT Cobra Mustangs

If the difference with stock crank w/ 2.70 upper and a 6lb lower w/ 2.70 is 3" does that mean I just add 3" to the belt I'm running now??