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I have a problem for you guys to try and figure out. A 97 670 summit with 145 pounds of compression both sides. Both clutches have been taken apart, cleaned, inspected, and had the stock springs replaced with new stock springs (purple/yellow, and beige).
Now as I understand it the primary clutch is the one that deals with rpm (spring controls engagement, weight determines peak rpm). The primary in this sled is setup stock except for the pins which weigh in at 13.8 grams and I have no idea what they are supposed to actually be but 13.8 seems like it would be light enough to really rev?
I want this thing to rev out at 8200 rpm at 6000ft on clicker 5, and right now it is reving about 7200 at 2000ft on clicker 3. Also I am running a factory tach which I know aren't that accurate but in the ballpark, but I have relocated it and in doing so have shortened the wires about 5 feet. Also the deflection of the belt is right and it is a new belt but a gates extreme.
The rpm testing was done on a flat road with about 2 inches of snow, abd the rpms hit 8000 spinning out on the ice as I started but then held 7200 the rest of the pull (power seems good and sled runs fine, plugs look good)
So my questions are these:
1. Shouldn't 13.8 grams be light enough to get me the rpm's I want, and is going any lighter okay
2. Did shortening my tach wires screw with the accuracy
3. Would the gates belt have that much of a bearing in this situation
4. Will going to a stiffer spring in the primary affect my peak rpm AT ALL
5. Is there something that could be wrong with the cluches that I may have missed, or even something wrong not clutch related
Any help is appreciated, I know there are a lot of smart people on this website and I apologize for my ignorance on the whole clutching subject.
p.s. I know the tach sucks but a digitron isn't in the budget till next year
Now as I understand it the primary clutch is the one that deals with rpm (spring controls engagement, weight determines peak rpm). The primary in this sled is setup stock except for the pins which weigh in at 13.8 grams and I have no idea what they are supposed to actually be but 13.8 seems like it would be light enough to really rev?
I want this thing to rev out at 8200 rpm at 6000ft on clicker 5, and right now it is reving about 7200 at 2000ft on clicker 3. Also I am running a factory tach which I know aren't that accurate but in the ballpark, but I have relocated it and in doing so have shortened the wires about 5 feet. Also the deflection of the belt is right and it is a new belt but a gates extreme.
The rpm testing was done on a flat road with about 2 inches of snow, abd the rpms hit 8000 spinning out on the ice as I started but then held 7200 the rest of the pull (power seems good and sled runs fine, plugs look good)
So my questions are these:
1. Shouldn't 13.8 grams be light enough to get me the rpm's I want, and is going any lighter okay
2. Did shortening my tach wires screw with the accuracy
3. Would the gates belt have that much of a bearing in this situation
4. Will going to a stiffer spring in the primary affect my peak rpm AT ALL
5. Is there something that could be wrong with the cluches that I may have missed, or even something wrong not clutch related
Any help is appreciated, I know there are a lot of smart people on this website and I apologize for my ignorance on the whole clutching subject.
p.s. I know the tach sucks but a digitron isn't in the budget till next year