mmccray

Darn...

I found a good buy on some Big Reds, rotors and pads for my 90 C2 and today was going to be the "big" day to put them on ...or, so I thought.

Got everything off cleaned up and ready to put together, but low and behold the bolt holes from the new caliper to the new adapter don't line up. They are about 4 or 5mm off. The bolts to spindle are fine. The problem may be because using the two piece rotors instead of the one piece turbo rotor. If I were to try to force the bolts (which I never could or would) the metal guide inside the caliper will be digging into the rotor itself (not a good thing).

I've attempted to attach a picture of the problem, but, anybody who has done this particular brake job probably knows what I'm talking about. In the photo - the black circle is an approximation of where the bolts from the Big Reds needs to be, to center the caliper on the rotor.

Does anybody have a clue as to the correct part number and supplier for another hopefully correct adapter? This one came from FVD.

One other thing. I noticed that the 964's hard brake line (to caliper) is going to bind if I try to use it with the Turbo brakes. I'm assuming that I need to replace the line also - Does anyone know which lines would be correct to use.

Just for kicks the PN of the calipers are: 993 351 425 10 and 993 351 426 10
The rotors are: 993 351 045 10 and 993 351 046 10

Actually it looks like this would be just a bolt it up type of job with the correct adapters, and.. of course the right brake lines.

Sure could use some elightenment on this one...

Thanks - as always!
Marshall McCray
1990 C2 - currently with the old brakes back on.
1987 944S - gettin' more jealous by the day

NineMeister

From memory looking at the part number you have bought 993TT discs, it is possible that the adapters are made for the 965 3.6 turbo disc which has a different offset. I suggest that you contact your supplier FVD and get them to clarify the fitment requirements, they may also have the alternative adapter in stock.

Tom W

I'd first check with FVD to ensure they didn't send the wrong adapter by mistake. Failing that, check with Race Technologies. They supplied the big red kit that was installed on my car and the adapter they provided with perfectly with the rotors supplied.

Are you doing the rears too (I did)? I also just had the 993 master cylinder installed to help with pedal feel.

ian c - u.k

when i changed mine i went to a local automotive store with my old hard lines and a sketch of what i wanted , also an arc welding rod bent to the angles i needed ...................

i expected to get lines back that would fit perfect , instead , i waited about 5 minutes while they made up my lines .
they came as strait pieces and the guy on the counter bent them with is thumb to the rough shape !!
a bit of " teaking" was needed to get them in , but it was a simple job !!!

thinking about it , i can only remember doing the rears !!!
maybe the fronts fitted no problem ?

Tom W

I had no issues with making the minor bends to the hard lines on my car by hand. Given our cars age, it's a good time to replace the rubber brake lines too.

ian c - u.k

did that also , only as i was rebuilding the back of the car after minor fire damage
i think they were £16.00 each or something

mmccray

Thanks for the advice. I didn't try bending the lines as I was concerned, that being old, they may be brittle and break - leaving me stranded until I could get a replacement. I may check one of the local auto shops also, and see if I can get a new one made up. I'll probably go ahead and replace the brake hoses too while I'm at it.

Yes, I want to do the rears also, and plan to do the master cylinder and servo then. For now, all I want to do is change the reservoir. I'm having some trouble getting the correct one of those also. The 964 system has an overflow line, a vacumn line and 2 supply lines from the reservoir. The 993 reservoir the dealer sent me has 3 supply lines and a couple of other connectors. There's got to be another one that is more closely matched for use in the C2. Just haven't been able to figure out a PN for it. I'm hoping the dealer will take the first one back!!

Appreciate the advice to check with Race Technologies. I've sent an email with the picture to FVD and will try to work it out through them first.

Wish me luck!!
Marshall

mmccray

Do any of you think - applying a little heat to the brake line might assist with the bending?

Just a thought....

Marshall

ian c - u.k

doesnt need it , as long as you take your time and don't try to do too tight bends

warmfuzzies

They should be a soft nickel/copper mix of sorts, so will bend once or twice. But do it gently and no you don't need heat, especially if the lines have fluid in them......Just make sure you use a mandrel or former to radius them, kinks are a no no........I've done many a brakeline, and not had too many issues taking my time as I go.



Kevin.

ian c - u.k

think my new ones are kunifer ............
been banned from using it at work , yet got offered a job using it on a ship a couple of months ago !!!
no idea whats going on there !!

Tom W

Marshall, I see no reason to replace the reservoir. I've gone from new pads to dead pads and had no significant change in the level with the existing reseroir. You can get the 993 cap update that replaces the vent tube with a new cap and a plug - it' make bleeding less prone to forgetting to crimp the tube closed.

mmccray

Tom, appreciate the advice. As long as there is enough capacity in the existing system - I would prefer to leave it alone until ,and if, I change to the 993 MC and Servo. Seems to be a lot of disagreement on the point of MC and Reservoir capacity along with a lot of other things surrounding brake upgrades.

Thanks!
Marshall McCray

Jeff Curtis

Marshall, I didn't stare at your adapters too closely, but understand the issue you're having...all too well. Try FLIPPING the adapters around the other way and bolting them to the spindle, this could be the offset you need??

It was for mine.

Bill Gregory

Part numbers are 993.355.351.00 for the ventilated threaded cap and 993.355.331.00 for the cap and 999.512.069.02 for the hose clamp.