LS1 Hyd Slave Cyl

[M5Hunter]

What are you guys using to adapt the LS1 Hyd Slave Cyl/Throw-out Bearing to the BMW line?

thanks

[Maynor]

Vorshlag makes an adapter with bleed line.

[monger]

McLeod Industries 139026 (search on summit racing) that will adapt your gm slave to -4, then you'll need a -4 adapter to the bmw side....I believe its an m8 inverted flare, I forget.

[garretvs]

Speedway sells a nice set of fluid lines for the clutch that hook-up to the GM factory quick-connects

[JoeZ]

Speedway sells a nice set of fluid lines for the clutch that hook-up to the GM factory quick-connects

Excellent call. After having issues with the stock master, I switched to a Tilton 7/8" unit, and run a braided line from Speedway (48") to the slave and like you said it has the GM quick connect. While on the topic, I'd also highly recommend a remote bleeder that will allow you to bleed the clutch without getting underneath the car...big timesaver.

[M5Hunter]

McLeod Industries 139026 (search on summit racing) that will adapt your gm slave to -4, then you'll need a -4 adapter to the bmw side....I believe its an m8 inverted flare, I forget.

Finding a -4 to inverted flare fitting isnt so easy, any input on where to find one?

thanks guys

[monger]

summit racing also has those.

[M5Hunter]

i havent found a metric inverted flare fitting, let me know if you come across the part# thanks

[monger]

well I'm not sure its an inverted flare either...I bought a few I'll see if I can dig them up for a part number.

[M5Hunter]

Speedway was very helpful, got everything I needed from them

thanks

[GotCone?]

speedway rocks! and is just 40 minutes from me

[mateo m3]

would you please provide us with the parts # i need to get those lines too!!! HELP!!!!!!!!!! I called speedway and the tech could not help me find the right connector to the stock bmw master i need help

[iflytii]

i havent found a metric inverted flare fitting, let me know if you come across the part# thanks

Pegasus has them.

http://www.pegasusautoracing.com/gro...=BRAKEADAPTMET

McLeod Industries 139026 (search on summit racing) that will adapt your gm slave to -4, then you'll need a -4 adapter to the bmw side....I believe its an m8 inverted flare, I forget.

FYI Russell also makes an adapter in -3 and you get 2 for half the price as the Mcleod adapter.

Russell PN:RUS-640281

[M5Hunter]

I ended up just getting the speedway 22" fbody clutch line (its -4) and got a russels 3/8" x 28 invetered flare to -4 adapter from summit, then got a m10 bubble flare to 3/8" x 28 inverted flare adapter, I'll post the stuff up on my build thread soon

[M5Hunter]

This is what i did:



On the left(in red) is a adapter from summitracing, part number AER-FBM2937. You hook your -4 LS1 F-Body clutch line to this. In the middle is a brake line adapter, it is basicly a brake line with a 3/16 flare fitting on one side and a m10 bubble flare on the other. I got this from Autozone, sku# 568318. On the right(in white) is a M10 bubble plare union to connect to the stock BMW hyd clutch line. This was also from Autozone, sku# 845271

[bmwguru]

Excellent call. After having issues with the stock master, I switched to a Tilton 7/8" unit, and run a braided line from Speedway (48") to the slave and like you said it has the GM quick connect. While on the topic, I'd also highly recommend a remote bleeder that will allow you to bleed the clutch without getting underneath the car...big timesaver.

Do you have any pics of your Tilton clutch master cylinder install? Did you have to make an adapter bracket? Thanks in advance.

[JoeZ]

Do you have any pics of your Tilton clutch master cylinder install? Did you have to make an adapter bracket? Thanks in advance.

I went back/forth with Mike Collins on the design he had his machine shop do the brackets. These are some pics of the early bracket and 13/16" MC, I now use a beefier bracket and 7/8" MC.

[4G63T]

What issue were you having? Aftermarket clutch? Think going with a beefier stock clutch ala LS7 would've worked?

[JoeZ]

What issue were you having? Aftermarket clutch? Think going with a beefier stock clutch ala LS7 would've worked?

I use a centerforce 12" clutch and fidanza 12.5lb flywheel. My issues were with the clutch not fully disengaging at high rpms. This is very common in the LSx world (with any clutch setup), just look at all the adjustable MC's and slave cyl shims on the market.

I tried shimming the slave first, which helped a bit...but the Tilton was the true fix to the issue

[rao]

+1 on the remote bleeder. I use a stock BMW master cylinder and have not had any problems.

[RahgBag]

Are you guys just using the standard OEM slave cylinder and getting a remote bleeder for it?

[M5Hunter]

^ Thats what I did

[rao]

Stock replacement slave cylinder - mine is shimmed .125, which is what a lot of people do with a LS7 clutch.

[RahgBag]

Good info in this thread.

With a C5 corvette clutch and lightweight flywheel, would there be a reason for a shim? I take it the reason for the shim is like JoeZ said, problems disengaging the clutch at high engine speed?

[Demon Speed]

Are you guys just using the standard OEM slave cylinder and getting a remote bleeder for it?

Same here.

Fidanza al. flywheel turned down, .050. Spec clutch, no shims.