Author |
Message |
forgivemyspelling Samba Member
Joined: January 30, 2012 Posts: 68 Location: corona
|
Posted: Mon Apr 30, 2012 8:38 pm Post subject: |
|
|
ive been looking all day for a 4.56 cant find it so 4.86 it is, does any one have any idea about top speed? , i use to have 185 15s and i could hit 90 barely. My new tire size is 235-75-15. |
|
Back to top |
|
|
kevmotocross Samba Member
Joined: August 04, 2010 Posts: 119 Location: dominican republic
|
Posted: Thu Oct 04, 2012 6:28 am Post subject: |
|
|
i have too tranny... one say
BS.... and the othe : PF...
COULD ANYONE HELPME TO IDENTIFY THEM |
|
Back to top |
|
|
baja5 Samba Member
Joined: February 28, 2004 Posts: 4326 Location: Ramona,Ca.
|
|
Back to top |
|
|
Mal evolent Samba Member
Joined: March 31, 2009 Posts: 2912 Location: San Antonio, Nuevo Mexico
|
Posted: Sun Oct 07, 2012 11:07 am Post subject: |
|
|
or use the formula posted in the original post..
Mathematics rears its ugly head: OK, it's really just arithmetic and algebra.
MPH = RPM X LRTR / GR X 168
Where:
MPH = MPH
RPM = RPM
LRTR = Loaded rear tire RADIUS, center of stub axle to pavement
GR = Final drive ratio = internal gear ratio X Ring and Pinion ratio
168 is a fudge factor to take care of converting inches and minutes to miles and hours.
Example:
If we want to know how many miles per hour per 1000 RPM we can expect with a 4.125 R&P, .89 4th gear and 31 - 10.50-15s:
MPH = ( 1000 X 15.5 ) / ( ( 4.125 X .89) X 168 )
MPH = ( 15500 ) / ( 3.67125 X 168 )
MPH = ( 15500 ) / ( 616.77 )
MPH = 25.13 MPH / 1000 RPM _________________ 73 Beetle Baja, Ghia front brakes, Type 3 rear brakes, 2220 ( 94 X 80 ), Weber Progressive, Bosch SVDA, '97 Mustang seats
Baja Bugs for Volkswagen Virgins: Index |
|
Back to top |
|
|
cmiller95 Samba Member
Joined: August 04, 2010 Posts: 1232 Location: Illinois
|
|
Back to top |
|
|
cmiller95 Samba Member
Joined: August 04, 2010 Posts: 1232 Location: Illinois
|
|
Back to top |
|
|
joescoolcustoms Samba Member
Joined: August 08, 2006 Posts: 9054 Location: West By God Virginia
|
Posted: Wed Oct 10, 2012 7:59 pm Post subject: |
|
|
cmiller95 wrote: |
I cureently have a swing axle in my Sandrail. Im converting it to IRS. Do the IRS and swing axle trans have the same differential? Can i just change side plates and the side gears to the irs ones and be on my way? oh ya and the flanges |
Yes, Maybe, No.
All three of those answers could apply, depending on a lot of variables.
No to just changing the side gears and flanges. They are totally different.
No to the same differential.
Maybe to the same ring and pinion and maybe a differential swap.
Yes to needing to reset the back lash if a differential is changed.
I reccomend to just buy a IRS tranny and use it. _________________ Bad News Racing 2018 NORRA 1000 3rd in Class
Best Day Ever Racing 2022 NORRA 1000 2nd in Class and first All Female team to complete the race
Everyone is gifted. Some just do not open the package.
Looks like it was painted with a live chicken,polished with a brick and buffed with a pine cone |
|
Back to top |
|
|
cmiller95 Samba Member
Joined: August 04, 2010 Posts: 1232 Location: Illinois
|
|
Back to top |
|
|
joescoolcustoms Samba Member
Joined: August 08, 2006 Posts: 9054 Location: West By God Virginia
|
Posted: Mon Oct 15, 2012 8:32 am Post subject: |
|
|
cmiller95 wrote: |
The inside gear set of my swing axle isnt stock so i dont wanna get rid of it. If i buy an irs superdiff, irs side plates, and the irs side gears, i set teh backlash on the diff. Is that what would be needed? |
You hit the nail on the head.
That is exactly what is needed, plus the CV flanges. _________________ Bad News Racing 2018 NORRA 1000 3rd in Class
Best Day Ever Racing 2022 NORRA 1000 2nd in Class and first All Female team to complete the race
Everyone is gifted. Some just do not open the package.
Looks like it was painted with a live chicken,polished with a brick and buffed with a pine cone |
|
Back to top |
|
|
forgivemyspelling Samba Member
Joined: January 30, 2012 Posts: 68 Location: corona
|
Posted: Sat Oct 20, 2012 11:58 pm Post subject: |
|
|
so i tryed to put the 4.37 in my self the trany got mad at me after i started driving it hoping out of gears and stuff ,didnt adjust it properly,so i gor one off craigs list totaly lucked out it had a close ratio 4th |
|
Back to top |
|
|
sanclementekid Samba Member
Joined: February 19, 2006 Posts: 3 Location: Sonoma County California
|
Posted: Sun Mar 17, 2013 6:57 pm Post subject: using 73 suoer beetle transmission for 71 super beetle |
|
|
I want to use the 73 tranny I have and put it into my 71 super beetle...what changes do I need to do? |
|
Back to top |
|
|
75smith Samba Member
Joined: July 09, 2011 Posts: 2275 Location: NH
|
Posted: Sun Mar 17, 2013 7:25 pm Post subject: |
|
|
might need to change the nosecone, or the mounting bolts... should have 2 or 3 bolts, depending on the year...other than that everything should be the same _________________ My 1975 Beetle Build Updated 8-21-12
My engine build |
|
Back to top |
|
|
JiI Samba Member
Joined: February 18, 2006 Posts: 1844 Location: Michigan
|
Posted: Mon Aug 19, 2013 10:14 pm Post subject: |
|
|
Could anyone give me a walkthrough on flipping the R&P for mid engine? Going to be running a 2 liter T4 engine, a T1 IRS, hopefully with a 4.375 R&P. 31" rear tires, 1,200 lb total car weight.
Jeff |
|
Back to top |
|
|
JustBuggy Samba Member
Joined: August 01, 2010 Posts: 849 Location: SF Bay Area, Ca.
|
Posted: Tue Aug 20, 2013 5:03 am Post subject: |
|
|
What frame are you using for mid engine? |
|
Back to top |
|
|
JiI Samba Member
Joined: February 18, 2006 Posts: 1844 Location: Michigan
|
Posted: Tue Aug 20, 2013 6:11 am Post subject: |
|
|
Full custom. It's for a (gasp!) Volksrod.
Jeff |
|
Back to top |
|
|
joescoolcustoms Samba Member
Joined: August 08, 2006 Posts: 9054 Location: West By God Virginia
|
Posted: Tue Aug 20, 2013 6:55 am Post subject: |
|
|
Measure the back lash between the ring and pinion before taking apart. Flip the ring gear and set the back lash to the same amount. The shims that set/adjust the back lash are behind the carrier bearings. Make sure to keep the same overall thickness of shims to maintain the proper pre load on the bearings.
I used to run a mid engine drag rail that weighed in at 804 pounds. Lotts of fun. _________________ Bad News Racing 2018 NORRA 1000 3rd in Class
Best Day Ever Racing 2022 NORRA 1000 2nd in Class and first All Female team to complete the race
Everyone is gifted. Some just do not open the package.
Looks like it was painted with a live chicken,polished with a brick and buffed with a pine cone |
|
Back to top |
|
|
JiI Samba Member
Joined: February 18, 2006 Posts: 1844 Location: Michigan
|
Posted: Tue Aug 20, 2013 9:27 am Post subject: |
|
|
joescoolcustoms wrote: |
Measure the back lash between the ring and pinion before taking apart. Flip the ring gear and set the back lash to the same amount. The shims that set/adjust the back lash are behind the carrier bearings. Make sure to keep the same overall thickness of shims to maintain the proper pre load on the bearings.
I used to run a mid engine drag rail that weighed in at 804 pounds. Lotts of fun. |
I have no idea how to do what you just said to do.
Jeff |
|
Back to top |
|
|
joescoolcustoms Samba Member
Joined: August 08, 2006 Posts: 9054 Location: West By God Virginia
|
Posted: Tue Aug 20, 2013 9:49 am Post subject: |
|
|
Best take it to a VW trans expert. It will need to be a double side cover trans case. _________________ Bad News Racing 2018 NORRA 1000 3rd in Class
Best Day Ever Racing 2022 NORRA 1000 2nd in Class and first All Female team to complete the race
Everyone is gifted. Some just do not open the package.
Looks like it was painted with a live chicken,polished with a brick and buffed with a pine cone |
|
Back to top |
|
|
GA_Boy Samba Member
Joined: October 10, 2006 Posts: 1405 Location: Jefferson, GA
|
Posted: Tue Aug 27, 2013 9:01 pm Post subject: |
|
|
Am I the only one that has a problem with this formula in the first post?
Loaded tire radius???????????? The circumference of the tire does not change with load so using Radius under load seems to me to be wrong. Please correct me if I am wrong. Radius at 9, 12, and 3 O'clock is fine IMO.
Marvin (See formula below)
Where:
•MPH = MPH
•RPM = RPM
•LRTR = Loaded rear tire RADIUS, center of stub axle to pavement
•GR = Final drive ratio = internal gear ratio X Ring and Pinion ratio
•168 is a fudge factor to take care of converting inches and minutes to miles and hours. |
|
Back to top |
|
|
Mal evolent Samba Member
Joined: March 31, 2009 Posts: 2912 Location: San Antonio, Nuevo Mexico
|
Posted: Wed Aug 28, 2013 5:25 am Post subject: |
|
|
air down to 10 PSI. is the radius the same at 12 o clock, 3 o clock, 6 o clock, and 9 o clock? _________________ 73 Beetle Baja, Ghia front brakes, Type 3 rear brakes, 2220 ( 94 X 80 ), Weber Progressive, Bosch SVDA, '97 Mustang seats
Baja Bugs for Volkswagen Virgins: Index |
|
Back to top |
|
|
|