I will be installing a Centerforce Dual Friction clutch in my 65 mustang. It has a 4 speed toploader in it. Also I will be using the stock clutch linkage. Was wondering if I need to remove that spring under the dash? I bought the clutch for this year mustang (65). But its a diaphragm style with the weight system. Here is the part http://cgi.ebay.com/ebaymotors/CENTE...spagenameZWDVW

Looks just like the one in the picture on ebay. Let me know if I need to take that spring off under the dash?

 

No. That's a pedal return spring mainly. I converted to a full hydraulic release system and have never had to take that spring off

 

The pedal spring is as the previous poster stated. Don't take it off.

 

I was told that i have to remove the spring when I use a diaphragm style clutch. But this clutch is for a old mustang and I don't know if the spring needs to be removed or not. The clutch is not a 3 prong(finger style). It looks like a diaphragm style.

 

Unless you got something in writing from the clutch oem, let it alone.

 

Unless you got something in writing from the clutch oem, let it alone.

 

It's not a returnspring:-| It's an over-center assist spring. And yes, you do need to remove it when installing a diaphragm clutch.

The OE long-style clutch requires a lot more pedal pressure to actuate than the diaphragm style clutch, much more than would be comfortable on your leg alone, facilitating the need for an assist spring. When swapping to a diaphragm clutch, leaving the spring in causes the pedal to want to snap to the floor after a certain point. Worse, since many diaphragm clutches have centrifugal weights designed to increase pressure as rpm's increase, the pedal can stick to the floor during high-rpm shifting. Obviously this could be a problem if you're assuming the clutch is going to engage when you drop the gas pedal to the floor.

I had to remove the spring when I swapped clutches on my 67, made a world of difference.

 

+1! Even if the pedal is adjusted such that it will return to the up position by itself, leaving the spring in will make for a non-linear pedal effort that will really make you look like a novice who doesn't know how to drive a manual. BTDT, removed the spring.

 

I have a centerforce clutch and opted to leave the spring out as well. I have read that it is not neccessary when using a diaphram type clutch. I cannot comment about the performance as of yet due to the install not being done.
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Hmmm....I thought it was an over-center assist as well but wasn't sure. I left mine on though and haven't had any problems. Wonder if it'd work better with it off....