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wlpotter
Wilfred Potter

(5 posts)

Registered:
12/25/2012 03:07PM

Main British Car:


IRS
Posted by: wlpotter
Date: December 25, 2012 03:12PM

Hi there, for the next project my son & I are looking for info on the IRS under RX7 or aBMW.Anyone with experience or exposure? Is the RX7 a Ford 8.8 unit? The spline count on axles? Overall width? Bolt circle? Thanks any info on either setup is appreciated.


wlpotter
Wilfred Potter

(5 posts)

Registered:
12/25/2012 03:07PM

Main British Car:


Re: IRS
Posted by: wlpotter
Date: December 25, 2012 03:20PM

Forgot to state that the car will be a tube framed, widened & lengthened Series Alpine w a Volvo Turbo Ford 2.3-2.5 4 cyl & 5spd. I have a cple of jag rears but want to look at the RX & BMW onfo.Thanks, Will Potter


mgb260
Jim Nichols
Sequim,WA
(2032 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: IRS
Posted by: mgb260
Date: December 25, 2012 08:47PM

Wilfred, Here are pictures of Series II and Series III. Turbo models used 8" ring gear. Or my idea of Toyota IFS for IRS:
IMG_1640.jpg [forum.britishv8.org]
New%20Rear.JPG



Edited 1 time(s). Last edit at 12/25/2012 08:48PM by mgb260.


wlpotter
Wilfred Potter

(5 posts)

Registered:
12/25/2012 03:07PM

Main British Car:


Re: IRS
Posted by: wlpotter
Date: December 26, 2012 08:55AM

Thanks Jim; interesting idea for the Toyota IFS. Is this the same diff as the trucks? They make tons of after market stuff for truck axles. WP


socorob
Robbie
La
(173 posts)

Registered:
09/17/2009 04:42PM

Main British Car:
1963 Sunbeam Alpine Series 2 Ford 2.8 V6

Re: IRS
Posted by: socorob
Date: December 26, 2012 09:38AM

You can get an 8.8 irs from a mk 8? Lincoln. I was at the local pullapart about a month ago and there were 3. It looks likethe whole assembly would drop out but not sure how heavy it is or easy to mount.


mgb260
Jim Nichols
Sequim,WA
(2032 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: IRS
Posted by: mgb260
Date: December 26, 2012 12:50PM

Wilford, The link alongside the pictures tells everything about the Toyota 7.5. Robbie, the 8.8 is used by RX7 racers but the axles are custom and expensive.


roverman
Art Gertz
Winchester, CA.
(3031 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: IRS
Posted by: roverman
Date: January 02, 2013 12:03PM

Wilfred and clan, "if" you can use aftermarket, 930 Porsche CV's and axles, this saves $'s and opens-up length and strength possibilities. Onward, roverman.



rficalora
Rob Ficalora
Willis, TX
(2668 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
Re: IRS
Posted by: rficalora
Date: January 02, 2013 11:54PM

That's what I ended up using... 930 style CV's. The Drive Shaft Shop in Salisbury, NC will do them any length and provide an adapter plate to convert to whatever your diff flange is. They can also match most stub axle sizes and spline counts.


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