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Re: Whats holding me in the 109 MPH range
[Re: 65cuda]
#456669
09/25/09 01:13 AM
09/25/09 01:13 AM
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Joined: Jun 2009
Posts: 705
Michigan
Hemiroid
super stock
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super stock
Joined: Jun 2009
Posts: 705
Michigan
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Quote:
Thanks Cab so u are saying that even if the tranny seems fine it might still have a broken sprag. that will let loose sometime.
Mr. P i have read everything i can find about the pinion angle. so it says they should be 0 but you plan on spring wrap and u place the pinion down enough to wrap back to 0. because something is wrong. i now i have a stonger u-joint now but i feel there is a cause and i am trying to figure that out.
Not sure what you're reading for reference material, but if it claims 0* for a leaf spring car, it's wrong. 4-5* nose down with leafs and you're all set.
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Re: Whats holding me in the 109 MPH range
[Re: Hemiroid]
#456670
09/25/09 08:19 AM
09/25/09 08:19 AM
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Joined: Feb 2003
Posts: 515
Dayton, Ohio
65cuda
OP
mopar addict
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OP
mopar addict
Joined: Feb 2003
Posts: 515
Dayton, Ohio
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well maybe thats the problem. i was reading here http://www.moparts.org/Tech/Archive/axle/8.htmland it shows 2* up or down is ok if the drive shaft matchs the other way. maybe i am reading it wrong. my trans is 4*down and my pinion is 4* up with the car sitting on jack stands like it was on the wheels. soooooo if i need 4* down then i will have to move the perches. thats too far for shims. if i am going to do that i might as well move the springs over. not to the frame but just the 1" kit. my tires just slightly touch the springs. 
65 Cuda 360,3.23 SG-13.97 @99.4, 88 D100, 2000 Kota Qcab, 71 Duster 416 11.84 @110., 73 Imp ,(2)72 & (1)71 Dart Swingers
GarysMocars Legendary Dealer
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Re: Whats holding me in the 109 MPH range
[Re: 65cuda]
#456671
09/25/09 09:45 AM
09/25/09 09:45 AM
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Joined: Jun 2009
Posts: 705
Michigan
Hemiroid
super stock
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super stock
Joined: Jun 2009
Posts: 705
Michigan
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Quote:
well maybe thats the problem. i was reading here
http://www.moparts.org/Tech/Archive/axle/8.html
and it shows 2* up or down is ok if the drive shaft matchs the other way. maybe i am reading it wrong. my trans is 4*down and my pinion is 4* up with the car sitting on jack stands like it was on the wheels. soooooo if i need 4* down then i will have to move the perches. thats too far for shims. if i am going to do that i might as well move the springs over. not to the frame but just the 1" kit. my tires just slightly touch the springs.
I cut this out of the information you refered to. I underlined the recommended angle from the text, and circled the drawing for reference. Make the angle in the circled area 5 degrees and you're done. For example, if the driveshaft and pinion were at exactly the same angle, simple push the nose of the pinion down 5 degrees and presto, you're done. Not sure where you were getting confused or reading 0 degrees. Hope that helps.
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Re: Whats holding me in the 109 MPH range
[Re: Hemiroid]
#456672
09/25/09 10:03 AM
09/25/09 10:03 AM
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Joined: Feb 2003
Posts: 515
Dayton, Ohio
65cuda
OP
mopar addict
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OP
mopar addict
Joined: Feb 2003
Posts: 515
Dayton, Ohio
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That seems easy but on down in the same info it shows the pics of 2* up and down as correct. wish i knew how to do that cut and paste trick. but it seems that most people agree the the pinion should be down 4-5 and i will have to cut the perches loose to move it that much. but something IS wrong so i am leaning that way.
65 Cuda 360,3.23 SG-13.97 @99.4, 88 D100, 2000 Kota Qcab, 71 Duster 416 11.84 @110., 73 Imp ,(2)72 & (1)71 Dart Swingers
GarysMocars Legendary Dealer
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Re: Whats holding me in the 109 MPH range
[Re: 65cuda]
#456673
09/25/09 11:59 AM
09/25/09 11:59 AM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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I'm thinking perhaps you are thinking of the car sitting static and needing 0°. What Mr P and others are saying is it should be 0° UNDER LOAD. Because leafs wrap a little regardless of clamps or bars or snubber, you have to set it to be pinion down (compared to the trans output shaft angle) when the car is sitting in race trim, with driver and fuel in it. Then when you floor it, the axle wraps and the resulting driveshaft angle is 0°. With stiffer front section springs and a snubber I find 2-3° down works best for me. There are a bunch of opinions on this so be prepared...lol.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Whats holding me in the 109 MPH range
[Re: 65cuda]
#456674
09/25/09 01:23 PM
09/25/09 01:23 PM
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Joined: Jan 2003
Posts: 644
Owego, NY
JBurch
mopar
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mopar
Joined: Jan 2003
Posts: 644
Owego, NY
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I've been watching this for a while, and now I'll throw my  in: Way back in the begining, the question was asked "....what is your trap rpm........?", you answered with a mile-an-hour number, but I have not seen where you state what the RPM of the engine is turning when you cross the finish line; you also stated you are using an M/T drag radial, but no size! I'm gonna guess that your tire is a 275/60/15, doing a little reverse engineering math, with that tire and stated MPH of 110, you're crossing the finish line at about 5500 rpm. Your cam isn't large by any standard, intake so-so(the wieand), and carb not big eather. You're feeding 400 plus cubes, your peak power is happening the same time you cross the finish line at about 5500rpm. Take some gear out, ie try a set of 3.91's or 3.73's; you've got the torque to pull them. You stated that your 60 foots were in the 1.5-1.6 sec range, not great but certinally nothing to go home crying to Momma about, you're getting ahold of a piece of the track, take advantage of it! Give it a shot, and let us know what happens. Good luck, Jim Burch
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Re: Whats holding me in the 109 MPH range
[Re: JBurch]
#456675
09/25/09 01:38 PM
09/25/09 01:38 PM
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Joined: Feb 2003
Posts: 515
Dayton, Ohio
65cuda
OP
mopar addict
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OP
mopar addict
Joined: Feb 2003
Posts: 515
Dayton, Ohio
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your right i missed that. it is going 6.-6.5k at the end. the tire is a MT 255/60/r15. i think it's 27.1" tall. it feels like it runs out of steam at the end. it pulls real hard in 1 and 2 then last 100' it slowly pulls up to the end.
65 Cuda 360,3.23 SG-13.97 @99.4, 88 D100, 2000 Kota Qcab, 71 Duster 416 11.84 @110., 73 Imp ,(2)72 & (1)71 Dart Swingers
GarysMocars Legendary Dealer
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