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Old 01-12-2018, 04:50 PM   #1
Funkee
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Default Small dia brake booster for 242

I'm looking for options to put a smaller diameter booster to clear the T6 intake manifold in my 242.
Without reinventing the wheel I might drop the question in here as well.
The current booster is about 10.5" in diameter.
I found 2 options:

7" Mini booster:



Thing is, it's quite bulky and deep, and I'm pretty sure even a thin aluminium cylinder (not the GM style pictured) wont clear the shock tower so no real option, I guess.

1985-ish Toyota mini truck booster:



About 8" I think and I can prolly use the Toyota cylinder as well.

What are your thoughts? It (probably) needs to power 4 pot Brembo fronts and to be honest I don't know how big the impact would be regarding pedal feel, with a smaller booster.
Won't mind a stiffer pedal, I had non-powered brakes before so if it's anything in between I'll be fine.
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Old 01-12-2018, 06:13 PM   #2
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Nissan micra k10 is supposedly bolt on, only needing to shorten the pusher pin on the booster

http://forum.savarturbo.se/viewtopic.php?f=23&t=93032
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Old 01-12-2018, 07:04 PM   #3
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Exactly the kind of thing I was looking for. Thanks man!
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Old 01-12-2018, 07:16 PM   #4
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Nissan micra k10
There's a car I haven't heard in a while. The Super Turbo models were little pocket rockets of the mini class cars. Pretty neat little car with a cult following. May be able to get the same unit over here in Canada for all NA people having issues. I believe the Micra replaced the Pulsar hatch around the mid 80s.
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Old 01-12-2018, 08:05 PM   #5
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This thread is pertinent to my interests. I'm swapping a 3-valve 4.6L V8 in a 245 and will have valve cover to booster interference issues. I'm also considering a Mustang hydroboost setup, but the Micra vacuum booster is so cute!
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Old 01-12-2018, 08:38 PM   #6
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How about the thin booster as used in the 16V 740?
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Old 01-12-2018, 09:15 PM   #7
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I’m swapping a 3-valve 4.6L V8 in a 245
Oh?
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Old 01-12-2018, 11:31 PM   #8
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Oh?
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Old 01-13-2018, 05:46 AM   #9
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Quote:
Originally Posted by dl242gt View Post
How about the thin booster as used in the 16V 740?
In my case I'm limited to the diameter, not thickness.
I'm going to put the engine a couple of inches 'into' the firewall and with the stock S80 intake it will hit the booster.

Bad pic but you'll see what I mean:



Don't know why but the K10 boosters new are over €400 so I need to find one on a JY, I know there are some around here that specialize in Japanese cars.

Nissan Primera looks quite small as well:


Last edited by Funkee; 01-13-2018 at 06:10 AM..
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Old 01-13-2018, 10:23 AM   #10
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I had stock thick booster with a T6 manifold with flipped plenum. Did shorten the runners a little to clear the booster.



And with a 3V 4.6l I'd use Hydroboost as I did with 2V. Outperforms regular vacuum boosters. Or make a stand for the booster behind left front light and move battery to trunk.
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