Bit of a discussion in the General forum about fitting new IRS mounts, seems to me S3 has particular problems but are underrepresented.
viewtopic.php?f=2&t=15799
Has anyone else tried to fitt SNGB's superstiff polyurethane IRS mounts on an S3?
IRS mounts
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lowact
Topic author - Posts: 627
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#2 Re: IRS mounts
No, I fitted standard ones and had the usual issues as covered in the extensive thread you’ve attached. Does the IRS flex excessively with standard mounts anyway? Unless for full on racing suggest hard rubbers not the best choice, will likely make a difficult job even harder.
Bob
Bob
1973 E Type OTS V12
Lotus Esprit V8
Lotus Esprit V8
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#3 Re: IRS mounts
Just for info CliveR over on Jag Lovers has done some tests on available irs mounts....here are his comments..
To put in context with some numbers - I bought three mounts from one of the leading suppliers, described as Genuine, Aftermarket and Uprated. My tests gave the following results for lateral stiffness:
Genuine: 620 N/mm (3550 lbf/in)
Aftermarket: 246 N/mm (1400 lbf/in)
Uprated : 600 N/mm (3450 lbf/in)
To put in context with some numbers - I bought three mounts from one of the leading suppliers, described as Genuine, Aftermarket and Uprated. My tests gave the following results for lateral stiffness:
Genuine: 620 N/mm (3550 lbf/in)
Aftermarket: 246 N/mm (1400 lbf/in)
Uprated : 600 N/mm (3450 lbf/in)
Steve
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc
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