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Topic: serpentine belt size? (Read 1347 times) previous topic - next topic

serpentine belt size?

I have a 351w with the mustang front  pulley set up, I modified the P/S and A/C bracket to keep that stuff, (just like the bracket you can buy) and no smog pump, what is a good way to measure for belt, or if someone already has the size would be great?

serpentine belt size?

Reply #1 –
pull a string,
max out your idler pully and pry it all the way up
measure that with a string

lower the idler pully to about half way down
mesure that with the same string

go shop for your 6 rib belt and find the size that is the cheapest that fits on or between your measurements.

i found out that a 1/4'' long belt can be the difference between a 16 dollar belt and a 45 dollar belt.

with your setup, i would measure it.

did you find a dizzy rubber boot cover yet?

serpentine belt size?

Reply #2 –
With Ford OEM brackets and no smog my 408w uses a 86" belt... like scott said use a string and if your tensioner has a range indicator make sure your in range.  I actually measured bought a belt and than decided to go 1.5" smaller to get my tensioner where I wanted it.

http://www.summitracing.com/parts/gtr-4060860
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serpentine belt size?

Reply #3 –
you can also hack saw off a chunk of the aluminum on the tensioner where the tab hits the stop.
cut away some of the stop area to let the tensioner move even more .... that got my son and i into the same belt that is 18.99 at napa if the cost is still the same.

serpentine belt size?

Reply #4 –
I will let you know how it turns out, going to try the string in the morning

serpentine belt size?

Reply #5 –
88in did the job, about half way on the range mark, 87.5 no way it was going on, they had a 87.8, but if in range on the 88in I am leaving alone.

serpentine belt size?

Reply #6 –
Sounds good, it's going to stretch a tad bit too after use and a couple of heat cycles..
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