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-   -   2.4 7R Mag Case Question (http://forums.pelicanparts.com/porsche-911-technical-forum/201065-2-4-7r-mag-case-question.html)

jbell959 01-11-2005 03:40 PM

2.4 7R Mag Case Question
 
Is there any difference between a 7R case from a 73 1/2 T CIS and a 7R case from a 73T Carb engine? I've heard the value of the 73 1/2 T cases is higher because they are rare.

Thanks

Tyson Schmidt 01-11-2005 04:54 PM

Rare does not always equal desirable. Take the 912E for example.

If it's a 2.4 7R case, then it's got the small spigots and all the 7R reinforcements, and has lived a less tortured life than a 2.7 7R case. But why a 73.5 T case would be more desirable than any other 2.4 7R case is beyond me.

The 73.5 T wasn't exactly a high water mark for Porsche in any category other than fuel mileage.

jbell959 01-11-2005 08:02 PM

Wayne's book mentions something unique about the cylinder spigot spacing on the 73.5 T 7R case....

Tyson Schmidt 01-11-2005 08:45 PM

It's not unique. Just any 2.4 7R case has small spigots and beefier cylinder bases. It's not just a 73.5 T thing, it's any 2.4 7R case.

zotman72 01-11-2005 09:02 PM

I know this sounds wierd, but it is true. My 72T 2.4 case, one side was a 5R and the other was a 7R in the casting numbers. I sent it off to Competition Engineering for preping when made it into a 2.4S motor a couple years back, noticed the descrepancy and was puzzled at the time. It was a late numbered '72 VIN.

Bobboloo 01-11-2005 09:09 PM

Unusual but not unbelievable. My 72' case is 4R/5R which is actually quite common. I had a 73' case that was also 4R/5R.

svandamme 01-12-2005 01:23 AM

Quote:

Originally posted by Bobboloo
Unusual but not unbelievable. My 72' case is 4R/5R which is actually quite common. I had a 73' case that was also 4R/5R.
same here

Jim Richards 01-12-2005 03:47 AM

Really? Hmmm. My 73E was "born" in January 1973 and it's a 7R/7R case.

svandamme 01-12-2005 03:56 AM

mine was october 73

could it be that production was high, and they had to sometimes make due with what they got, resulting in cases not matching revisions ( the dimensions were similar, design was compatible, so if you need em , you just use em )

Jim Richards 01-12-2005 04:04 AM

Stijn, did you mean to say October 72?

svandamme 01-12-2005 04:08 AM

eeh, yeah


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