Of turbo bodies and G50's..

[ChrisBennet]

Hi,
I'm always answering questions, now it's my turn to ask some.
Does the turbo body have a bigger transmission tunnel and is it big enough for a G50?
Was the '77 930 transmission shorter than say an '86 930 transmission?
thanks,
Chris

[cab83_750]

Chris,

From what I understand, the '86 930 tranny is longer than the 7X tranny. I have purchased an 86 930 going into a 72 and was advised that I need to cut the bellhousing for fitting. I do not have info about the tunnel.

The info above is as of Friday of last week.

[ChrisBennet]

Thanks "cab".
-Chris

[beepbeep]

930 bodies between 75' and 78' were same as SC bodies (apart from fenders).

Starting from 78' model, some genius at Porsche decided that rubber-damped "exploding" clutch is just what we need.

This forced the factory to lenghten 930 transmission bell-housing around the clutch and move engine further back...so all 930 bodies are longer in the back than coresponding SC/Carrera ones.

What this "update" cost in retooling and exploding rubber clutches is still to be found out.

Anyway, it means that 930 <78 and all SC and Carreras share the same body, but all 77> 930 are somewhat longer in the back.

That being said, i don't know if OEM "turbo look" cars are of pre- or post-78 type.

Also, as far as i know, G50 installation will require cutting out a piece of torsion-tube (=coilovers) to acomodate longer front "overhang" of G50.

I posted some info and pictures in this thread, check it out:

78 930 powertrain swap to 77 930 body?

Cheers!

/Goran

[ChrisBennet]

Thank Goran.
-Chris

[Wil Ferch]

Goran:
To be clear..when you say "bodies" are longer, you obviously mean transmision bodies....the car bodies are the same length in all cases.... no ?
---Wil Ferch

[beepbeep]

Originally posted by Wil Ferch
Goran:
To be clear..when you say "bodies" are longer, you obviously mean transmision bodies....the car bodies are the same length in all cases.... no ?
---Wil Ferch

Nope, i mean that both tranny bellhousing and car body itself are longer. I just can't stop thinking how much hassle/added cost it was for factory to actually make new longer-body rigs just to accomodate rubber-clutch which deemed as totally worthless and often replaced by spring-damped one just as it was on <77' cars...

To better illustrate this, i uploaded cutouts of <78' and 78'> 930 body here:

78 =>:

< 78:


Check out distance between rear engine mounts...

(I've become unvolontary expert in this field beacuse we had to do extensive research before our conversion-project...)

[ChrisBennet]

Your drawing (only) shows that the inside of the engine compartment is larger. Any chance the true length of the car is the same i.e. measured to say the lid latch or outside of the tub (underneath the rear bumper)?
-Chris

[beepbeep]

Originally posted by ChrisBennet
Your drawing (only) shows that the inside of the engine compartment is larger. Any chance the true length of the car is the same i.e. measured to say the lid latch or outside of the tub (underneath the rear bumper)?
-Chris

Frankly, i dunno.

I just know that engine sits further back...it would be easy to check by comparing article #'s for sheetmetal flares for pre and post 78 930's. If they are different then body itself is longer...or i could superimpose drawings to each other.

[juan ruiz]

I too have a question was the 88-89 the Only ones with the G-50 ? Can someone post the designation on years for the 930 cars

G-50 what years
915
G-50-50
G-50-52
Thanks........

[ChrisBennet]

Originally posted by juan ruiz
I too have a question was the 88-89 the Only ones with the G-50 ? Can someone post the designation on years for the 930 cars

G-50 what years
915
G-50-50
G-50-52
Thanks........

For pre-964 cars:
915 '72-86
G50 '87-89 Carrera
G50 '89 930

[beepbeep]

AFAIK, only 89' 930 had G50 , then 964 came.
930 never had 915 tranny's...it had short 930 tranny (930/30 i think) 75-77, then long one 78-88 (930/34)

[Overpaid Slacker]

Goran -
A Porsche guy pointed out to me how the mounting points are different on side-by-side specimens. The aft-most mount is located about an inch further back in the body, but the bodies are the same.
Lift the tail of a 78+ 930 and look for the rear mounting bolt -- it's almost back under the lip of the engine bay. Now open any non 78+930 (911) and you'll see the rear mount is about an inch further forward. You'd never notice it until someone points it out (well, I'd never have noticed it).

JP

[Jack Olsen]

Worse f/r weight distribution.

What a crazy decision to make for the top-of-the-line model.

[cowtown]

But didn't the factory also use longer trailing arms to push back the wheelbase a bit? I thought this was supposed to negate the weight distribution issue. (At least the issue of moving the engine rearward. It's still obviously a heavier engine).

[Overpaid Slacker]

Colin - I don't know if there are longer trailing arms, honestly. It's still more weight aft in an already tailheavy car.
If I'd had the stomach for another project, I'd have bought a 77 and used its transmission w/ my 78 motor, for the better f/r weight dist.

[Wil Ferch]

"Overpaid Slacker" had it right..

....the "internal" body ( if you wish to call it that) may be longer, but the outside sheet maetal stampings did not change, nor did the overall length of the external car. Rear rockers, flairs, etc...would otherwise all be different.

--Wil Ferch
PS-Chris...the 86 Carrera is RIP?? What ??

[Bill Verburg]

All 911 and 930 '76 - '87(last year I have hard data for)

• W/B 2272 mm
• O/A Length 4291mm

[Wil Ferch]

Bill:
Thank you...as I thought .....
---Wil