what pully have i got

[motox75]

hey guys was told i have a 9 psi pully on my car when i bought it how can i tell what size and what make it is as i want to change it to a smaller one it has one bolt in the middle not like some of the picks i have seen on hear which have 5 or so bolts does this meen it is a holden one ???????

[bhopper]

hey there hope this helps but there is a few brands of pulleys out there just hav to find the right one for yours but if its one bolt probably holden one.

PSI...............inch..................mm........ ...belt wrap on 1/2 pulley

06................3.8"................95mm........ .............149mm
10................3.4"................86mm........ .............135mm
10.5..............3.35"...............85mm........ .............134mm
11................3.3"................84mm........ .............132mm
11.5..............3.25"...............82mm........ .............129mm
12................3.2"................81mm........ .............127mm
13................3.1"................79mm........ .............124mm
14................3.0"................76mm........ .............119mm
15................2.9"................73mm........ .............115mm
16................2.8"................71mm........ .............111mm
17................2.7"................68mm........ .............107mm
18................2.6"................66mm........ .............104mm
19................2.5"................63mm........ .............99mm
20................2.4"................61mm........ .............96mm
21................2.3"................58mm........ .............91mm

[motox75]

what do u mean by belt wrap and how do i measure the pully corectly. cheers

[wamboin23]

give us a picture.

just measure the diameter, should be close enough...

[motox75]

will take a pick 2morow and post it.cheers