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Old 02-18-2007   #1 (permalink)
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Unanswered: Braking power

Howdy All!
Just finished the final brake upgrade on my car and I now have real brakes.
It did require a few days work to remove the hood, left headlight assembly and work out all the bugs but the stopping power is phenomenal.

I used a 9" booster from a BMW 325I which bolts right up with no mods. The master cylinder is a 24mm unit from a Mitsubishi Eclipse which had to drill two holes to mount on the booster. The BMW booster moves the master cylinder forward 35mm so a remote mount reservoir was used.

The vehicle now stops flat without any effort and 60-0 times were reduced substantially. Pics are below.
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File Type: jpg MVC-005S.JPG (19.4 KB, 100 views)
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Old 02-19-2007   #2 (permalink)
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Neat!

That master cylinder looks really familiar... I'm using one from an Eagle Talon (dodge product), I think it must be the same one. Good tip on the BMW booster - what year?

cheers,

jtb
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Old 02-20-2007   #3 (permalink)
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Originally Posted by jtb View Post
Neat!

That master cylinder looks really familiar... I'm using one from an Eagle Talon (dodge product), I think it must be the same one. Good tip on the BMW booster - what year?

cheers,

jtb
The Talon/Eclipse are the same car, just a different badge here in the states.
The Booster is from any E30 type BMW, the bolt pattern is the same as the Opel unit. You just have to make the turn buckle to attach it to the rod.

The booster provides up to 700Lbs of support, versus the 500lbs supplied by the Opel unit @18 inches of vacuum. Makes the pedal nice and hard up top but takes no effort to quickly stop the car.
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Restore, Customize and Conquer!!!

'73 Opel GT Convertible "Stealth"
'70 Opel GT - 4 speed "Lucy"
'72 Opel GT - 4.0L V6 automatic "Animal"
'72 Opel Ascona 1900 "Junk Yard Dog"
'71 Opel Manta Automatic "Coco"
'72 Pontiac Ventura II SD455 "Monster"
'07 GMC Sierra 1500 - Daily driver
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Old 02-20-2007   #4 (permalink)
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Originally Posted by blancojp View Post
The Talon/Eclipse are the same car, just a different badge here in the states.
And Plymouth Laser. I think the Talon is more likely to have 4 wheel disc than the Laser. The base model Talon has more goody's than the base model Laser and the Eclipse can run the gamut from cheapest model to the most tricked out.

Harold
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Old 02-20-2007   #5 (permalink)
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Originally Posted by blancojp View Post
The BMW booster moves the master cylinder forward 35mm so a remote mount reservoir was used.
Where did you get the plastic connectors that go in the MC, to connect to the hoses to the remote reservoir?
Do you know/remember what the diameter of the MC "inlet" is, where the connectors stick in?

Dieter
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Old 02-20-2007   #6 (permalink)
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The M/C is a 7/8" bore unit and the plastic fluid input port come with the unit. Both 10x1.0mm output ports are on top, the front is a short one and the rear is the tall one. You can't use this unit with stock brakes, you will get a short pedal travel but very little pressure. I need it because I have 4-wheel disks and the rear floating calipers have 80mm pistons which require larger fluid delivery to operate.

I was really knocked out with the results, my Opel brakes are now comparable to the brakes on my Cayene.
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Restore, Customize and Conquer!!!

'73 Opel GT Convertible "Stealth"
'70 Opel GT - 4 speed "Lucy"
'72 Opel GT - 4.0L V6 automatic "Animal"
'72 Opel Ascona 1900 "Junk Yard Dog"
'71 Opel Manta Automatic "Coco"
'72 Pontiac Ventura II SD455 "Monster"
'07 GMC Sierra 1500 - Daily driver

Last edited by soybean; 02-21-2007 at 12:52 AM. Reason: spelling
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Old 02-21-2007   #7 (permalink)
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Right, good point - I am running rear disc brakes too. I don't think this master cylinder would be appropriate for a stock opel gt.
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Old 02-21-2007   #8 (permalink)
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Brake booster

Would the BMW booster help a stock GT brake set up?
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Old 02-21-2007   #9 (permalink)
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Originally Posted by mschmalenberg View Post
Would the BMW booster help a stock GT brake set up?
Yes, it will improve pedal performanceand feel since it will require less effort to operate.
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Restore, Customize and Conquer!!!

'73 Opel GT Convertible "Stealth"
'70 Opel GT - 4 speed "Lucy"
'72 Opel GT - 4.0L V6 automatic "Animal"
'72 Opel Ascona 1900 "Junk Yard Dog"
'71 Opel Manta Automatic "Coco"
'72 Pontiac Ventura II SD455 "Monster"
'07 GMC Sierra 1500 - Daily driver
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