Engine vibration at 2k-2.4k...I think it's the ASP pulley
09-10-2005, 03:20 PM
#1
Banned
Thread Starter
iTrader: (1)
Join Date: Nov 2004
Location: North of Seattle
Posts: 2,057
Likes: 0
Received 0 Likes
on
0 Posts
Engine vibration at 2k-2.4k...I think it's the ASP pulley I'm thinking it's my underdrive pulley becuase it all started in February when i got the car put back together. Has anybody seen this happen before?
I thought it was a tuning issue but have everything pretty close in the tune and it's still there. The more load i put on it the more it vibrates. I have never had issues of the charging system dipping down or false knock. but i think the pulley is out of balance.
Would a machine shop be able to determine this? any ideas on how i could test it locally w/o sending it back to ASP? Thanks
Nate
I thought it was a tuning issue but have everything pretty close in the tune and it's still there. The more load i put on it the more it vibrates. I have never had issues of the charging system dipping down or false knock. but i think the pulley is out of balance.
Would a machine shop be able to determine this? any ideas on how i could test it locally w/o sending it back to ASP? Thanks
Nate
09-11-2005, 09:52 AM
#2
TECH Enthusiast
iTrader: (7)
Join Date: Feb 2005
Location: new hudson,mi
Posts: 735
Likes: 0
Received 0 Likes
on
0 Posts
are u sure u got the crankshaft bolt tightened enough , i beleive the torque spec on that is like 200ft/lbs which is a ton, could be leading to vibration if not tightened enough
09-11-2005, 02:18 PM
#4
Staging Lane
Join Date: Dec 2004
Location: Grand Forks, ND
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
I've read before that a certian brand of underdrive pullies are known for being out of balance and causing a lot of problems. The info is documented at installuniversity.com
Seems I read a lot too about people having problems with underdrive pullies in general. Might want to consider going back to stock.
Seems I read a lot too about people having problems with underdrive pullies in general. Might want to consider going back to stock.
09-11-2005, 11:13 PM
#5
Banned
Thread Starter
iTrader: (1)
Join Date: Nov 2004
Location: North of Seattle
Posts: 2,057
Likes: 0
Received 0 Likes
on
0 Posts
Actually the more i think about it the more i think i have a weird resonance going on between the exhaust resonance and the solid motor mounts. I'm going to try a few more things tomorrow to fix it.
Nate
Nate
