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#91
Ace, Aceca & Greyhound Forum / Re: AC Aceca front disc brakes...
Last post by AC Ace Bristol - April 14, 2026, 14:38:39.
Graham
.
Just received an email from a very reliable and highly respected ACOC friend.
Which I share below:
.
I read your post on the Club Forum regarding Discs and Calipers, Unfortunately I believe some of the Information is incorrect.
The calipers definitely fit, Both the 16B solid and 16P split, although the bottom groove should be relieved for the larger diameter disc of the AC.
If the AC disc is reduced in diameter the pads will stick out beyond the disc.
Mounting hole spacing of the calipers is the same for the AC & TR.
The 1959/61 Greyhound used the same 16B Solid caliper as the Ace / Aceca, The 1961/63 Greyhound used the 16P Split Caliper.
Girling master catalogue uses the same part numbers for Ace / Aceca and the TR4 1961/62 .
( I believe AC machined out the groove, But have no proof of that. )
As you say the discs are not interchangeable
.
PART No's from the Girling catalogue:-
.
Ace/Aceca calipers .. .. .. .. 64032520/1
Greyhound 1959/61 .. .. .. 64032520/1
Greyhound 1961/63 .. .. .. 64032602/3
TR4..... .. .. .. .. .. .. .. .. .. 64032520/1
Later TR4 caliper used on some Cobra's.
Girling catalogue also list Part No for discs up to 1961 GB49613.
The above info is from recent personal experience and directly from my Girling catalogue.
I hope the above information is helpful and clears up any misinformation.
Best regards
XX
.
>>>>>>>>>>>>>>>>>>>
XX
Thank you for your valued input, Really appreciated..
The ACOC Forum is there to assist all AC enthusiasts, It is important that all information shared is accurate ,
Thank you once again for your value input.
Cheers for Now
Keith.
.
Graham
.
Just received an email from a very reliable and highly respected ACOC friend.
Which I share below:
.
I read your post on the Club Forum regarding Discs and Calipers, Unfortunately I believe some of the Information is incorrect.
The calipers definitely fit, Both the 16B solid and 16P split, although the bottom groove should be relieved for the larger diameter disc of the AC.
If the AC disc is reduced in diameter the pads will stick out beyond the disc.
Mounting hole spacing of the calipers is the same for the AC & TR.
The 1959/61 Greyhound used the same 16B Solid caliper as the Ace / Aceca, The 1961/63 Greyhound used the 16P Split Caliper.
Girling master catalogue uses the same part numbers for Ace / Aceca and the TR4 1961/62 .
( I believe AC machined out the groove, But have no proof of that. )
As you say the discs are not interchangeable
.
PART No's from the Girling catalogue:-
.
Ace/Aceca calipers .. .. .. .. 64032520/1
Greyhound 1959/61 .. .. .. 64032520/1
Greyhound 1961/63 .. .. .. 64032602/3
TR4..... .. .. .. .. .. .. .. .. .. 64032520/1
Later TR4 caliper used on some Cobra's.
Girling catalogue also list Part No for discs up to 1961 GB49613.
The above info is from recent personal experience and directly from my Girling catalogue.
I hope the above information is helpful and clears up any misinformation.
Best regards
XX
.
>>>>>>>>>>>>>>>>>>>
XX
Thank you for your valued input, Really appreciated..
The ACOC Forum is there to assist all AC enthusiasts, It is important that all information shared is accurate ,
Thank you once again for your value input.
Cheers for Now
Keith.
.
#92
AC Weller Engine / Re: Engine bearings for AC Ace...
Last post by Aussie16/70 - April 14, 2026, 03:00:19I am also about to remake Conrods if anyone wants a set let me know and I can do a group discount.
has anybody used modern pistons, (like a Honda CB900F), I know they use Kawasaki pistons in Bristols as they are cheaper, strong and have good sealing.
has anybody used modern pistons, (like a Honda CB900F), I know they use Kawasaki pistons in Bristols as they are cheaper, strong and have good sealing.
#93
Mk IV, Superblower, CRS and other Continuation Cars Forum / Re: MKIV and CRS Wheel fit (16...
Last post by Flyinghorse - April 09, 2026, 19:44:33I got a fair bit of info from one of the AP race engineers as I had the same with my front wheels ( Trigo).
The caliper used was CP5205-16/17S4. Apparently this was the narrowest size
I know there are a few Crs with 15" wheels so suitable rims were made but I don't think they are available new now.
Might have been Gerry Hawkridge that had them.
Think you have to watch the rear offset as well with Trigo on CRS.
One suggestion I got was to space the hub spindle outwards a bit.
The caliper used was CP5205-16/17S4. Apparently this was the narrowest size
I know there are a few Crs with 15" wheels so suitable rims were made but I don't think they are available new now.
Might have been Gerry Hawkridge that had them.
Think you have to watch the rear offset as well with Trigo on CRS.
One suggestion I got was to space the hub spindle outwards a bit.
#94
Mk IV, Superblower, CRS and other Continuation Cars Forum / Re: MKIV and CRS Wheel fit (16...
Last post by TenChanCobra - April 08, 2026, 12:33:23Hi Graham
Actually, this is proving more difficult than I thought, given I cannot find out the specs of the brakes. Trigo do not work on them. The brakes are too big. Vintage Wheels may have the same issue.
Do you know which CP reference number were applicable to the AP Racing 4 pot brakes?
Image Wheels near Birmingham have said they are willing to custom make a set of wheels for me if I can locate the specs of the brakes.
Thanks!
TCC
Actually, this is proving more difficult than I thought, given I cannot find out the specs of the brakes. Trigo do not work on them. The brakes are too big. Vintage Wheels may have the same issue.
Do you know which CP reference number were applicable to the AP Racing 4 pot brakes?
Image Wheels near Birmingham have said they are willing to custom make a set of wheels for me if I can locate the specs of the brakes.
Thanks!
TCC
#95
Vintage, PVT & 2 Litre Forum / Re: Water Pump
Last post by wirewheels57 - April 07, 2026, 20:29:49Having met Ian at one of our national days I was impressed enough to entrust the rebuild of my PVT water pump to him . I have not regretted the decision . Having used the car a fare amount over the last few years I can report that it does not leak , the bearings are still functioning as they should and the water temperature has dropped by 10n Degrees . Thankyou Ian
#96
Mk IV, Superblower, CRS and other Continuation Cars Forum / Re: MKIV and CRS Wheel fit (16...
Last post by Flyinghorse - April 03, 2026, 18:56:13Out of interest did you go vintage wheels ( rather than Trigo) at the front so you could clear the AP calipers?
Regards
Graham
Regards
Graham
#97
Ace, Aceca & Greyhound Forum / Re: AC Aceca front disc brakes...
Last post by B.P.Bird - April 01, 2026, 13:27:18Graham,
The original caliper was a Girling Type 'B' - some competition cars had alloy Type 'BR' and many cars, over time, have replaced these with Girling 16/3. Long years ago, but I seem to recollect that the change to 16/3 needed the A.C. discs to be machined down slightly in diameter
Barrie
The original caliper was a Girling Type 'B' - some competition cars had alloy Type 'BR' and many cars, over time, have replaced these with Girling 16/3. Long years ago, but I seem to recollect that the change to 16/3 needed the A.C. discs to be machined down slightly in diameter
Barrie
#98
Mk IV, Superblower, CRS and other Continuation Cars Forum / Re: MKIV and CRS Wheel fit (16...
Last post by RJE - April 01, 2026, 10:47:33Hello,
This is a well discussed issue, if you use the "search" function on the forum it should take you to the various posts on the subject.
This is a well discussed issue, if you use the "search" function on the forum it should take you to the various posts on the subject.
#99
Ace, Aceca & Greyhound Forum / Re: 56 Ace
Last post by AEX132 - March 31, 2026, 02:25:27Hello Ben and thanks for the tip. I just found a copy for sale at Hortons! I'm very excited to learn more about the history of this fabulous car and even more so to get it back on the road.
Cheers,
Alex
Cheers,
Alex
#100
Ace, Aceca & Greyhound Forum / Re: 56 Ace
Last post by AEX132 - March 31, 2026, 02:22:11Thanks James I'll get some more pictures next time I'm in town. My son and I run a small Performance shop here in Portland, Oregon and plan to do a light restoration on it. I remember driving it several times as a teenager under my dad's supervision of course
It's a four speed manual and the button was fitted by the previous owner to activate the horn. It will be one of the first things to be removed. I would describe the current color as root beer. Not my favorite so eventually we'll return it to the original green.
Cheers, Alex.
It's a four speed manual and the button was fitted by the previous owner to activate the horn. It will be one of the first things to be removed. I would describe the current color as root beer. Not my favorite so eventually we'll return it to the original green.
Cheers, Alex.