76 replies to this topic

[xu2308]

so is 316 from a LJ XU-1 ???????

[xu2308]

VH316= Mystery LJ XU-1 Booster i guess lol

[dattoman]

Don't get too hung up on the numbers
It might have been replaced at some stage if it failed with a recon one

PBR used a number of ID's for these things
They are all essentially the same unit though internally
No 1 unit is better than the other

[xu2308]

thanks dado, as they say u learn every day

datto

[XUI-86]

VH316= Mystery LJ XU-1 Booster i guess lol

Hi AL

I'll put up with the tyre kickers, and tell you my 10/ 70 LC xu1 booster has stamped on it VH 316 and than looks like i7 B 5

Cheers Mark

[xu2308]

OK no worries VH316 muust be the GMH Factory backup Claytons Booster unit, the Booster unit they used when the others wouldent do (or were out of stock maybe) lol

[71xu1]

My 2nd 71XU1 has a 317 booster with a date code of 22A1

[xu2308]

well Mike so is VH316 the Mulder&Scully version of the LJ XU-1 Brake Boosters lol

[Dr Terry]

A VH316 is from an early HK. It superseded the original VH300 in 1968.

AFAIK the early HK double diaphragm boosters (with the relay lever set-up) with fit the LC/LJ mounts & look just like an XU1 booster.

Dr Terry

[xu2308]

Thanks Dr terry for that, yes to look at it looks the same as a LJ XU-1 Booster, bolts up the same and worked awesome with the old XU-1 Discs and XU-1 Calipers that were on the Car, and works even better with the LX V8 Disc and Calipers i changed to awhile back. im guessing maybe a factory mistake as in the wrong brake booster been put on the car or its been replaced some time in its life with the wrong replacment booster

[xu2308]

American Auto Parts list the rebuilt brake booster for a LC XU-1 as VH316
and the HK-HG one as VH305
these are for you to exchange your old booster for theres.
So was the VH316 on some LC XU-1's as well ?????? or they got it wrong lol

[dattoman]

VH316 on HK is the same VH316 on LC

95mm rear rod and shallow front rod for the shallow piston master
LJ has deep piston master so different rod depth

Where I was working rebuilding boosters we just called the VH316 and asked the customer deep or shallow when building them
And not uncommon to be building 3 or 4 at once so the front shells got interchanged between boosters

[xu2308]

interesting to know and learn Datto

[Dr Terry]

Thanks Dr terry for that, yes to look at it looks the same as a LJ XU-1 Booster, bolts up the same and worked awesome with the old XU-1 Discs and XU-1 Calipers that were on the Car, and works even better with the LX V8 Disc and Calipers i changed to awhile back. im guessing maybe a factory mistake as in the wrong brake booster been put on the car or its been replaced some time in its life with the wrong replacment booster

Hi al.

I've seen you mention LX V8 discs & calipers here & in another post. AFAIK there is no differences in the brake systems on 4, 6 & V8 LX Toranas other than the larger double diaphragm vacuum booster fitted to the V8. I'm excluding L34s & A9Xs of course, but in any given time period the disc rotors & brake calipers are the same on a Sunbird as they are on an SL/R 5000.

Dr Terry

[Dr Terry]

American Auto Parts list the rebuilt brake booster for a LC XU-1 as VH316
and the HK-HG one as VH305
these are for you to exchange your old booster for theres.
So was the VH316 on some LC XU-1's as well ?????? or they got it wrong lol

AFAIK the only boosters fitted to XU1s at the factory were the VH317 (up to 7/71) & VH324 (7/71 onwards).

There are other numbers off early HK (relay lever type) which will fit straight in & look the same as XU1 boosters. They are VH300, 304 & 311. The only external differences are the push rod length & vacuum valve hole size.

There are also 305, 320, 329 & 330 off later HK/T/G & LH/LX V8. These look the same again but need the pedal push rod modified to fit LC/LJ.

Over the years, the various brake reconditioners have mixed & matched cases & other hardware when building boosters, so any of the above could turn up on an LC/LJ substituting for an XU1 original.

Dr Terry