M030 technical question
- Thread starter DivineE
- Start date
Big Blacks are not the same calipers as 944 Turbo M030 ones. 951 S and 944 S2 M030 option cars used 928 S4 caliper which is smaller than 928 GTS Big Black. 993 "big" Blacks are just the same caliper in size like 928 S4 ones.I suppose Big Black is the wrong term to use,because there are tru Big Blacks available. 993's Big Red's are the same size as 928 GTS Big Blacks. More or less same calipers just connecting tube & bleeding screws are located in opposite side of the calipers.
951 S & Big Black/Red piston size is the same thoug.
951 S & Big Black/Red piston size is the same thoug.
sawood12
New member
Big Blacks were fitted on the 928GTS (rearward of the hub). Big Reds were fitted to 964 turbo and 993 turbo (forward of the hub). These are identical calipers apart from colour and location of the bleed nipple due to being mounted behind hub on 928 and forward of the hub on 911 turbo's. You need 17" wheels or larger if you install these. The discs you need to use with these calipers on a 944 are the disks off a 928GTS (solid) or 964 turbo (drilled). 993 turbo disks have a different offset so are not suitable. If drilled disks is your bag and you want rear drilled disks to go with your 964 turbo disks then 968M030 rear disks are drilled.
944 M030 'Medium blacks' are smaller than big blacks/reds and had fit behind 16" wheels. They have the same piston diameter as the big red/blacks but smaller pad.
There is nothing wrong with the use of adaptor brackets, they work fine, so no need to search high and low for a pair of M030 hubs, most of which you'll find of broken cars that have been in crashes so the integrity of which you wont know. I'd rather stick with the hubs I have and use bracket adaptors.
944 M030 'Medium blacks' are smaller than big blacks/reds and had fit behind 16" wheels. They have the same piston diameter as the big red/blacks but smaller pad.
There is nothing wrong with the use of adaptor brackets, they work fine, so no need to search high and low for a pair of M030 hubs, most of which you'll find of broken cars that have been in crashes so the integrity of which you wont know. I'd rather stick with the hubs I have and use bracket adaptors.
DivineE
New member
Wow now that was an informative post! You should add that to the FAQ section as there seems to be a lot of confusion and that explains it very clearly.
Would you recommend the Lindsey Racing adapters? I heard they had a problem with clearances against the suspension strut or something? Also isn't the offset of the disk centre different on the Early 944 turbo? Would you still be able to use the 964 turbo/ 968M030 combination?
This would obviously be by far the best and most economical solution if it's possible but would like to check it works before I start buying parts!
Would you recommend the Lindsey Racing adapters? I heard they had a problem with clearances against the suspension strut or something? Also isn't the offset of the disk centre different on the Early 944 turbo? Would you still be able to use the 964 turbo/ 968M030 combination?
This would obviously be by far the best and most economical solution if it's possible but would like to check it works before I start buying parts!
sawood12
New member
The lindsay adaptors are what I had on my old car. They work fine. The only difference I noticed is that pads are usually set on a radius such that a small sharp lip forms around the rim of the disk as it wears. With the Lindsay adaptors they have increased the radius a little bit so the edge of the pad lines up with the outer rim of the disk so you get no lip forming. This is intentional as I queried LR about it and they do it on purpose to prevent the edge lip from forming.
You need to remove the disk baking plates. I guess if you really wanted to retain them you could buy the plates off a 928GTS and install those, but to fit you need to dismantle the hub. There is no detrimental effect to the removal of these plates apart from getting brake dust over the suspension wishbone.
I don't believe there is an adaptor kit available for the early offset cars. For these you'd need to replace the lower control arm, front hub to get the later offset.
I bought the entire Lindsay Racing Big Black kit that comprised of brand new calipers, caliper adaptors, OEM 928GTS disks, SS braided brake hoses, front and rear pads. All for $1500 which back in the day when you got $2 to the pound was cheaper than I could get a tatty pair of used Big Red calipers off ebay. It is ridiculous how much people are prepared to pay for tatty used stuff off ebay.
If I were to do it over again i'd give Boxster S calipers a go. They are far more plentiful and cheaper on ebay and there are kits now available.
You need to remove the disk baking plates. I guess if you really wanted to retain them you could buy the plates off a 928GTS and install those, but to fit you need to dismantle the hub. There is no detrimental effect to the removal of these plates apart from getting brake dust over the suspension wishbone.
I don't believe there is an adaptor kit available for the early offset cars. For these you'd need to replace the lower control arm, front hub to get the later offset.
I bought the entire Lindsay Racing Big Black kit that comprised of brand new calipers, caliper adaptors, OEM 928GTS disks, SS braided brake hoses, front and rear pads. All for $1500 which back in the day when you got $2 to the pound was cheaper than I could get a tatty pair of used Big Red calipers off ebay. It is ridiculous how much people are prepared to pay for tatty used stuff off ebay.
If I were to do it over again i'd give Boxster S calipers a go. They are far more plentiful and cheaper on ebay and there are kits now available.
DivineE
New member
Ooh where from? Thank you very much for all the info by the way. My car is early offset so this does complicate things but just to clarify for the record 'if' you do change the hubs to the M030 type you can keep the original wishbones and wheels to keep the early offset without upsetting anything. (only found this out because I bought a car with this conversion already installed).
Also another point for the record the 'Big Blacks' don't fit in the 16" wheels. I know you said this above but I tried it for real to make sure it wasn't a rumour and it didn't fit
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