930 Brake Question

[porsche356a]

Hi Folks -

Please indulge a quick caliper fitment question:

If I have a set of 951 wheels:

7x16 Fuchs
Part 951.362.115

8x16 Fuchs
Part 951.362.117

Will 930 brakes fit under these wheels without modifications to the wheels or brakes?

Also, since these currently fit my '87 Carrera with rolled fenders, they should fit an '89 Carrera with rolled fenders, right?

[Wil Ferch]

930 fit under 15's even.....heck, 917's used 15" diameter wheels, and their calipers were copied for 930's.

--Wil

[rdane]

What Will missed is you typically have to modify the claipers on the 930s or add spacers. The 951 wheels should help with that becausethey have more room behind the spokes but it is car and caliper dependant. You would need to check both to be sure.

[89911]

They will not fit 6x16's unless you use a small spacer.

[RoninLB]

Originally posted by 89911

They will not fit 6x16's unless you use a small spacer.

really.. sounds good to me. So a small spacer is 1/8 or 1/4 ?

[Wil Ferch]

I didn't mention 6x16's because thet weren't asked -for.

1978 and later Turbos used these on ( possibly) 15" Fuchs.....but those were 7 and 8". Hubs were different enough from normally aspirated 911's that spacers ( lateral fitment) might be an issue... I thought the question was for radial ( diameter) clearance.

Good catch....

Wil

[RoninLB]

Originally posted by Wil Ferch

I thought the question was for radial ( diameter) clearance.

.. I have four 6X16 on a narrow body and became overwhelmed with the possibility of a 930 fitment.. my fault for the digression.

[rdane]

Turbos have a huge flair and big (1" or something?) spacer to clear the calipers and fill th wheel well. The 930 brakes go on a narrow body car using 9" turbo wheels in back with no spacer and no problem. Up from typically the caliper gets cut...some or a lot. Because even a 3 or 4mm spacer may not clear the tire off the fender lips even on rolled fenders.

The wheels under question are 944 wheels which have more room to clear the caliper than a typical set of 911 Fuchs. The 8" wheel 951 wheel is more often run on the front of a 911 with 930 brakes with a 9" 930 wheel on the back.

If you want to maximise what you are doing with 951 wheels ditch the 7 and buy a 9" 930 wheel to match.

Seth's car was the only one I have ever seen running 7 and 8 951 wheels. Some folks might like the no dish look compared to a set of 7 and 8 911 Fuchs. The 911 wheels will always look deeper because of the narrow internal offset.

(edited because I used the term back space in the wrong context when refering to caliper cleance on the spokes)

[porsche356a]

So, what is the final answer?

Will the 930 brakes fit under the 944 Turbo (951) 7,8 X16 wheels without modification?

I know the wheels fit the car.

Thanks.

[rdane]

The brake disc will fit inside the wheel no problem. The clearence on the spokes may or may not fit the 930 caliper without modification or spacer.

A spacer (if needed) will change the fitment of the wheel and tire on the car.

So the wheels may not fit the car after you clear the 930 calipers.

Put them on, bolt them up and see if they'll spin freely. Past that there is no easy way to tell.

[Bill Verburg]

7x16 Fuchs Part 951.362.115 and 8x16 Fuchs Part 951.362.117 both have the same +23.3mm o/s.

At the front the 944 7"wheel and the 911 7" wheel w/ +23.3 mm o/s both have the same o/s and backspace. The 944 wheel does have more room behind the spokes but not much more. Most likely a thin ~4 - 5mm spacer and/or shave the caliper fins is going to be needed. The spacer does move the wheel outboard by it's width but I have found that even larger spacers up to ~6mm can be accomodated by massaging the lips.

At the back the 8" 944 wheel already needs a spacer so caliper clearance depends on it's thickness. With a proper spacer there will be no issues at all.


ronin sorry, but there is no way 6" wheels can be used w/ 930 brakes w/o some rather large spacers. The caliper would be way to big for the tires anyway.

15s or 16s can be used in 7, 8,or 9" widths the wider the better.

[GeorgeK]

The 951 7" wide Fuchs has LOTS more room for calipers, while having the same offset. There is more than 1/2" additional room. Might fit the 930 brakes on the 911 suspension.

[RoninLB]

Originally posted by Bill Verburg

15s or 16s can be used in 7, 8,or 9" widths the wider the better.

ok, thanks.. that's all I have to know. 911 7, 8, or 9"