Power brake booster fitment w/4.6L 4v

[mjg1951g]

Would anyone know if I can fit a power brake booster on the 33 firewall
when running a 4.6L dohc?
Thanks in advance
Mike

[michael everson]

have you checked with Whitby Motorcars? I bought a setup from them. Pretty straight forward install.
Mike

[progmgr1]

I was not able to use the Whitby system in my '33 with Coyote power. The problem was that the vacuum reservoir was 10" dia. (IIRC) and it just wouldn't fit under the hood and inside the side covers. I'm not familiar with the 4.6L engine, but I suspect you may have the same issue. There is a lot more space under the hood on the roadsters and coupes where the Whitby kit is usually installed.

I found a power brake booster kit at Summit that has a 6" dia. reservoir (7" max at the flange) that fits with minimal clearance all around. I added some brackets to support the booster and had to build a custom linkage to tie everything together because my booster is mounted a lot higher on the firewall than usual. So, it can be done but requires extra work - not the bolt-in solution that Whitby offers. (BTW, the people at Whitby were great to work with. I wish I could have used their kit.)

Keith HR #894

173988 173987

[mjg1951g]

Thanks Mike, I’ll check with whitby.

[mjg1951g]

Thanks Keith. Appreciate your help
Mike

[Alan_C]

A Ford OEM hydroboost fit fine on my MK4. Might the hydroboost be an option if you have PS?