Boosted vs unboosted clutch master cylinder. What’s the benefits?

[coldtaco]

Hi all, so I got a boosted and unboosted clutch master cylinder. What are the benefits of each? The boosted one came from the Canadian BJ70 I used to have, which hasn’t been in use for more than 10 yrs so don’t know if it still works and if not can I get it fixed? The unboosted one is from my HJ75. Thanks.

 

[FJBen]

Well, I would say the non-boosted has less crap to go wrong with. it and will give you more room under the hood.

As to how much pedal difference there is, I'm not sure. My BJ74 is a non-boosted from the factory so I haven't ever tried the boosted.

 

[jblueridge]

Clutch booster goes on the cockpit side of firewall. No space lost in engine compartment.

 

[coldtaco]

Clutch booster goes on the cockpit side of firewall. No space lost in engine compartment.

Actually that is incorrect, at least on the 86 BJ70 Canadian.

 

[jblueridge]

Yes, you are right.
I guess mine is in the cabin to leave room for the 13bt turbo.

 

[SNLC]

You can get a rebuild kit for the booster.

Cheers

 

[coldtaco]

Anyone ever driven both? Any real difference?

 

[roalco]

FWIW, I have driven my cdn BJ60 (3B, H55, which is what you have, I think) both with power, and for a time (when the vac pump failed) without. Quite a difference, as I recall!!

 

[JBT]

Boosted clutch is really nice. Should be standard on all manual land cruisers.

 

[coldtaco]

Thanks

 

[i4c4lo]

There is always this too -

Clutch Master Cylinder - Fits HZJ/PZJ 7x w/3 Bolt master cylinder (CLN60060N)

Toyota Land Cruiser Clutch Master Cylinders

cruiserteq.com

 

[SNLC]

Anyone ever driven both? Any real difference?

Not a huge one. The boosted is certainly lighter though.

Cheers

 

[rick_d]

when i switched right to left hand used a late model clutch system. much more better.

Clutch Pedal Assembly for the HZJ7X Series Land Cruiser | eBay

This Clutch Pedal Assembly is listed for the 2007 to 2016 HZJ7X Series Land Cruisers. This Clutch Pedal Assembly was installed on a 2019 HZJ79 and removed with less than 5 miles on it! Clutch Pedal Pad - 31321-52010.

www.ebay.com

 

[coldtaco]

when i switched right to left hand used a late model clutch system. much more better.

Clutch Pedal Assembly for the HZJ7X Series Land Cruiser | eBay

This Clutch Pedal Assembly is listed for the 2007 to 2016 HZJ7X Series Land Cruisers. This Clutch Pedal Assembly was installed on a 2019 HZJ79 and removed with less than 5 miles on it! Clutch Pedal Pad - 31321-52010.

www.ebay.com

Interesting. Did it bolt straight in or did you have to modify/ drill new holes for it?

 

[Mr Cimarron]

Interesting. Did it bolt straight in or did you have to modify/ drill new holes for it?

@bottombracket has this kind. His 79 has different bolt pattern for the pedals compared to my 1998 75.

 

[coldtaco]

@bottombracket has this kind. His 79 has different bolt pattern for the pedals compared to my 1998 75.

Thanks for the info. Probably will pass on that one

 

[clintnz]

I swapped my non boosted LJ setup for a boosted one out of a PZJ70, inside booster, there are definitely at least 2 types of boosted clutch fitted to different 70 series models. Maybe a LHD vs RHD thing? External for LHD, internal for RHD? Seen here with the std LJ71 non boosted:

It was tight to fit, but did go in ok, only required the drilling of 1 or 2 extra bolt holes & a slight enlargement of the main hole, one of the bolt holes was common so it was easy to bolt on the bracket for a drilling guide.

Another thing to consider is that master vs slave cylinder diameters also vary - my std one above was 5/8" bore & the boosted one was 3/4". I suspect boosted setups usually run a bigger master cylinder to trade off some of the assistance for a shorter pedal stroke. With the above units the master cylinders were not interchangeable.

Cheers
Clint

 

[coldtaco]

Nice description and pictures. Thanks