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BigJimnyMeet (North) 2024 (12 Jan 2024)
BigJimnyMeet 2024
14th July 2024
Parkwood Nr. Leeds
14th July 2024
Parkwood Nr. Leeds
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Re:Pulse counting
19 Dec 2019 10:53 - 19 Dec 2019 11:00 #216575
by mlines
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
Pulse counting was created by mlines
So with the tyres 235/85R16 and 3.9 diffs, the speedo will need correction.
My old pulse is set up for 235/75/R15 on the 3.9 diffs.
So some maths help needed. What teeth count will I need on the pulse generator to get the correct speedo reading?
Thanks
My old pulse is set up for 235/75/R15 on the 3.9 diffs.
So some maths help needed. What teeth count will I need on the pulse generator to get the correct speedo reading?
Thanks
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
Last edit: 19 Dec 2019 11:00 by mlines.
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19 Dec 2019 11:11 #216576
by Lambert
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!
Replied by Lambert on topic Pulse counting
Allegedly the 16 inch is 6.6% larger circumference or 44 revs per mile less. What is your current pluses with the 15s?
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!
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19 Dec 2019 11:13 #216577
by mlines
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
Replied by mlines on topic Pulse counting
My own googling seems to show that a standard Jimny has a 25 tooth ring?
So 25 pulses per RPM.
Standard tyres are 205/70R15
According to tiresize.com/calculator/ this will rotate 767 times per mile
With 3.909 diffs, the propshaft will rotate 2,998 times, so would generate 74955.075 pulses.
So my 235/85R16 will rotate 636 times which equates to 2486.124 propshaft rotations
With rounding up its 75000/2486 = 30 approx.
I think I need a 30 tooth ring???
So 25 pulses per RPM.
Standard tyres are 205/70R15
According to tiresize.com/calculator/ this will rotate 767 times per mile
With 3.909 diffs, the propshaft will rotate 2,998 times, so would generate 74955.075 pulses.
So my 235/85R16 will rotate 636 times which equates to 2486.124 propshaft rotations
With rounding up its 75000/2486 = 30 approx.
I think I need a 30 tooth ring???
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
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19 Dec 2019 11:14 #216578
by mlines
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
Replied by mlines on topic Pulse counting
Sorry, cross posted with Lambert
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
The following user(s) said Thank You: Lambert
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19 Dec 2019 11:19 #216579
by Lambert
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!
Replied by Lambert on topic Pulse counting
The above sounds about right. Alternatively the obd2 screen thing I have can be calibrated and gives you a digital readout?
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!
Please Log in or Create an account to join the conversation.
19 Dec 2019 11:21 #216580
by mlines
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
Replied by mlines on topic Re:Pulse counting
Lambert, yes my obd2 reader does have a correction setting, but thought I would get the Speedo correct as well whilst building the new one
Sent from my Pixel 2 XL using Tapatalk
Sent from my Pixel 2 XL using Tapatalk
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
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- Posts: 8810
- Thank you received: 1759
- Points: 36237.00
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19 Dec 2019 11:27 #216581
by Lambert
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!
Replied by Lambert on topic Re:Pulse counting
Sounds logical if you already have it in bits and you can get another one to put it right.
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!
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19 Dec 2019 17:36 #216589
by Riccy
J999 MNY, ULYSSES M18 VVT with ITB's Dyno tested at 130hp
Pickup/tipper, R7me gearbox & 6.4 Rocklobster, 31" Toyo MT, 2x ARB air locker 3.9 diffs in braced axles, 6" total lift, Floating rear conversion, Raptor painted, CB, Recaro's, Caged, etc, etc...
www.youtube.com/user/riclemus
Replied by Riccy on topic Re:Pulse counting
I think mine is 30 tooth on to suit 31" tyres (which it does pretty well based on comparisons with various sat-nav and app speedo's).
Mine (rockwatt 4.16 box) is in need of bearings at the front prop output, but tempted to do the lot when its in bits. Do you supply the bearing kits and gaskets Martin?
Mine (rockwatt 4.16 box) is in need of bearings at the front prop output, but tempted to do the lot when its in bits. Do you supply the bearing kits and gaskets Martin?
J999 MNY, ULYSSES M18 VVT with ITB's Dyno tested at 130hp
Pickup/tipper, R7me gearbox & 6.4 Rocklobster, 31" Toyo MT, 2x ARB air locker 3.9 diffs in braced axles, 6" total lift, Floating rear conversion, Raptor painted, CB, Recaro's, Caged, etc, etc...
www.youtube.com/user/riclemus
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19 Dec 2019 17:37 #216590
by Riccy
J999 MNY, ULYSSES M18 VVT with ITB's Dyno tested at 130hp
Pickup/tipper, R7me gearbox & 6.4 Rocklobster, 31" Toyo MT, 2x ARB air locker 3.9 diffs in braced axles, 6" total lift, Floating rear conversion, Raptor painted, CB, Recaro's, Caged, etc, etc...
www.youtube.com/user/riclemus
Replied by Riccy on topic Re:Pulse counting
ah, ive just seen your reply to Jack on the postman thread about the bearings. You wouldnt happen to have part numbers for them by any chance? Pretty please!
J999 MNY, ULYSSES M18 VVT with ITB's Dyno tested at 130hp
Pickup/tipper, R7me gearbox & 6.4 Rocklobster, 31" Toyo MT, 2x ARB air locker 3.9 diffs in braced axles, 6" total lift, Floating rear conversion, Raptor painted, CB, Recaro's, Caged, etc, etc...
www.youtube.com/user/riclemus
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19 Dec 2019 17:46 #216591
by mlines
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
Replied by mlines on topic Re:Pulse counting
The bearing numbers are in the Wiki
www.bigjimny.com/mediawiki/index.php?tit...sion_to_Rock_Lobster
They are pretty common so you can choose budget or premium, I went for Premium
Martin
www.bigjimny.com/mediawiki/index.php?tit...sion_to_Rock_Lobster
They are pretty common so you can choose budget or premium, I went for Premium
Martin
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
The following user(s) said Thank You: jackonlyjack, Riccy
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