Here is what happens when you remove the airpump
#28
Dan
#33
Knowing what I know now I would have just developed my idler and saved the money of replacing my old under drive set. The thing is the water pump and alternator are such low load devices even a 4 rib belt could handle the load with a proper contact patch.
Dan
#35
Banned. I got OWNED!!!
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With a brand new properly designed water pump pulley and a new belt I don't disagree. Problem is the nice edges on the groves of the water pump pulley wear off with time and the back of the belt gets smoothed out and hard.
You could keep treating the symptoms by replacing the belt and/or pulley or correct the actual problem of having to small of a contact patch by adding an idler pulley.
If you feel comfortable with your setup, more power to you, but don’t mind me sticking to what I know from personal experience.
You could keep treating the symptoms by replacing the belt and/or pulley or correct the actual problem of having to small of a contact patch by adding an idler pulley.
If you feel comfortable with your setup, more power to you, but don’t mind me sticking to what I know from personal experience.
#38
I have figured out the bracket for the single turbo guys. I just need to source a bearing to handle the extra rpm from the smaller pulley. I'm still waiting for the prototype to be cut but the one I handmade fits perfect.
I have added a list to the group buy thread to judge interest, if I get enough onboard I will move forward with production.
Dan
I have added a list to the group buy thread to judge interest, if I get enough onboard I will move forward with production.
Dan
#43
I have the prototype bracket for the single turbo guys now and will post pictures as soon as I find my camera.
Basically if you have 3/4" clearance from the water pump housing on the turbo side it will work for you. The pulley will be mounted between the upper and lower radiator hoses and of course on the same plane as the water pump and main pulley.
Pulley size will be about the same as the alternator pulley. If I remember correctly the bearing will be a double sealed stainless steel ball bearing rated and 24,000 rpm between 500 to 1000lbs of load.
If you are interested, follow the link for the group buy in my signature.
Dan
Basically if you have 3/4" clearance from the water pump housing on the turbo side it will work for you. The pulley will be mounted between the upper and lower radiator hoses and of course on the same plane as the water pump and main pulley.
Pulley size will be about the same as the alternator pulley. If I remember correctly the bearing will be a double sealed stainless steel ball bearing rated and 24,000 rpm between 500 to 1000lbs of load.
If you are interested, follow the link for the group buy in my signature.
Dan
#44
Here are some pictures of the finished pulley kit and the new Single prototype:
New Single Turbo Prototype pulley kit:
When complete the pulley on the single turbo kit will look like the first kit but smaller. We just used the Alt pulley for test fitting.
Dan
New Single Turbo Prototype pulley kit:
When complete the pulley on the single turbo kit will look like the first kit but smaller. We just used the Alt pulley for test fitting.
Dan
#47
Dan
#48
i just removed my air pump last night with the pettit kit and i couldnt believe the belt barely has any contact with the water pump compared to stock set up, so i know i still shouldnt over tighten the belt but when is it tight enough to stop so this wont happen? ASAP PLEASE
#49
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i just removed my air pump last night with the pettit kit and i couldnt believe the belt barely has any contact with the water pump compared to stock set up, so i know i still shouldnt over tighten the belt but when is it tight enough to stop so this wont happen? ASAP PLEASE
https://www.rx7club.com/forum/showthread.php?t=810990
I have this on my car and it holds the belt nice and tight around the water pump without much tension on the belt at all.