The JHM over sized crank pulley was delivered today. Nice piece and looking forward to putting it on. Came with the 8 bolts and a new belt. Stock crank size is 6.385 inches or for the Canadians it’s 16.2179 CM… The oversized JHM is 7.00 inches or 17.78 CM… So it’s 9.63% bigger than the OEM but will verify. Weight wise it comes in at 5.2lbs and the stock one according to JHM as I haven’t weighed it yet is 8.6lbs. I got 8.2 when I weighed the stock one so a total of 3 lbs difference… I attached a few pics below.
Unfortunately, it has rained all day so I haven’t been able to do any logs to gather data on specified boost. I did go though all the logs I had and reviewed the ones where I had logged specified, absolute and bypass. The average delta from a percentage wise in 2nd and 3rd was 8% and in 4th 9%. Little to no bypass in the logs.
Wish I had more data on stage I and II requested boost, actual, iat’s, and timing. Tons of logs but unfortunately, I haven’t been consistent and mostly have stage II data and only a few stage I files. I still think the car will be able to take the additional boost with maybe a little bypass but IAT control will be critical. I really am not worried about the blower itself and if anything should go I’d prefer it that over the motor.
Now I need to decide if I install this first or wait until I get the other part back and installed to test them separately and that one first. I’ll make a decision early next week…
Oh and thanks Jake and JHM!
Edit: to add size of pulley… Edit: to add weight of stock pulley…
http://i1012.photobucket.com/albums/af247/concordslim/IMG_2356_zpsz5zoeeqf.jpg
http://i1012.photobucket.com/albums/af247/concordslim/IMG_2355_zpsgqrkvd3i.jpg
http://i1012.photobucket.com/albums/af247/concordslim/IMG_2357_zps6lcb1roy.jpg
