14LikesSerpent 977 Viper
06-12-2013, 01:45 PM
#332
Tech Addict
Hey guys:
Always the outside rear or fronts. The insides to middle will wear as they wish based on chassis camber and track so we can't count on the inner measurement. For example, you may start with a trued tire with 1 degree of cut camber and by the time your done running it, the tire has 3 degrees of camber cut into the foam. Right? The more valid variable is the outer part of the tire.
I'll take a #3 and a Pepsi
Always the outside rear or fronts. The insides to middle will wear as they wish based on chassis camber and track so we can't count on the inner measurement. For example, you may start with a trued tire with 1 degree of cut camber and by the time your done running it, the tire has 3 degrees of camber cut into the foam. Right? The more valid variable is the outer part of the tire.
I'll take a #3 and a Pepsi
06-12-2013, 02:29 PM
#333
Paulie B, you are running 4% overdrive?
06-12-2013, 02:52 PM
#334
I just checked the internal gearing for the 977. This is what i found: Rear pulley 48/21, side pulleys 19/25, front pulleys 18/28.
If you use a 4% overdrive ratio, it results in an 8.2mm split, a 3% is 8.8mm split and 2% is 9.5mm split, and 1% is 10.2mm split.
Any split between 8 to 10 mm gives a positive overdrive.
What percentage overdrive do you guys usually run?
With that in mind, what do you setup your ride height to be when you have a 3% overdrive ratio for example. (i.e. 8.8mm split)??
Info corrected below
If you use a 4% overdrive ratio, it results in an 8.2mm split, a 3% is 8.8mm split and 2% is 9.5mm split, and 1% is 10.2mm split.
Any split between 8 to 10 mm gives a positive overdrive.
What percentage overdrive do you guys usually run?
With that in mind, what do you setup your ride height to be when you have a 3% overdrive ratio for example. (i.e. 8.8mm split)??
Info corrected below
Last edited by dougday; 06-13-2013 at 08:05 AM. Reason: incorrect info
06-13-2013, 06:32 AM
#335
Tech Regular
977 Overdrive.pdf
Drive Calc Screen dump.pdfOK you've got my head spinning now , I've put the new pulley tooth counts into one of my old excel overdrive charts and have a completely different conclusion than both Paul and Doug , as a cross check I found the old Serpent drive calculator (had it in my file system could not find it on the Serpent site but then again it might be there and I just ran out of patience looking
) and it agrees with my calculations - discuss.
Drive Calc Screen dump.pdfOK you've got my head spinning now , I've put the new pulley tooth counts into one of my old excel overdrive charts and have a completely different conclusion than both Paul and Doug , as a cross check I found the old Serpent drive calculator (had it in my file system could not find it on the Serpent site but then again it might be there and I just ran out of patience looking
) and it agrees with my calculations - discuss.
06-13-2013, 07:46 AM
#336
Attachment 1078606
Attachment 1078607OK you've got my head spinning now , I've put the new pulley tooth counts into one of my old excel overdrive charts and have a completely different conclusion than both Paul and Doug , as a cross check I found the old Serpent drive calculator (had it in my file system could not find it on the Serpent site but then again it might be there and I just ran out of patience looking) and it agrees with my calculations - discuss.
Attachment 1078607OK you've got my head spinning now , I've put the new pulley tooth counts into one of my old excel overdrive charts and have a completely different conclusion than both Paul and Doug , as a cross check I found the old Serpent drive calculator (had it in my file system could not find it on the Serpent site but then again it might be there and I just ran out of patience looking
) and it agrees with my calculations - discuss.
06-13-2013, 08:37 AM
#337
Tech Regular
06-13-2013, 12:23 PM
#339
06-13-2013, 07:39 PM
#341
Attachment 1078606
Attachment 1078607OK you've got my head spinning now , I've put the new pulley tooth counts into one of my old excel overdrive charts and have a completely different conclusion than both Paul and Doug , as a cross check I found the old Serpent drive calculator (had it in my file system could not find it on the Serpent site but then again it might be there and I just ran out of patience looking) and it agrees with my calculations - discuss.
Attachment 1078607OK you've got my head spinning now , I've put the new pulley tooth counts into one of my old excel overdrive charts and have a completely different conclusion than both Paul and Doug , as a cross check I found the old Serpent drive calculator (had it in my file system could not find it on the Serpent site but then again it might be there and I just ran out of patience looking
) and it agrees with my calculations - discuss.OK so plugging in the numbers, in order achieve a 1.000 drive ratio, please tell me what number you come up with. I know what I come up with myself and I know what my memo says.
It's exactly the same.I'll call you tomorrow.
Paulie
06-14-2013, 07:10 AM
#343
Tech Regular
No head-spinning please....reminds me of the Exorcist.
OK so plugging in the numbers, in order achieve a 1.000 drive ratio, please tell me what number you come up with. I know what I come up with myself and I know what my memo says. It's exactly the same.
I'll call you tomorrow.
Paulie
OK so plugging in the numbers, in order achieve a 1.000 drive ratio, please tell me what number you come up with. I know what I come up with myself and I know what my memo says.
It's exactly the same.I'll call you tomorrow.
Paulie
Rick Davis
06-14-2013, 10:25 AM
#344