fitting T-5 wheels onto a P1800 (how can i change the PCB?)

Pedro Fandango · Nov 2nd, 2007, 22:43

Hello

after a lot of thinking & planning today i've decided the only wheels for Penelope are 850 T-5 alloys, but i know the PCB is wrong for the 1.8 P1800. How is best to change the PCB so they fit

i believe 2.litre P1800's have the correct PCB for what i need, can i change the rear drums (are they on drums?) & front hubs so they fit? Can the existing hubs/drums simply be redrilled? Or would getting an engineering shop to make up some conversion rings be a better/cheaper option. Or are there any other ways i can get them to fit?

many thanks Duane

JIM C · Nov 2nd, 2007, 22:52

Another issue is the T5 wheels will have a different offset being FWD going onto a RWD. Also I think the later P1800 with the correct PCD had disc brakes on the rear.

Pedro Fandango · Nov 2nd, 2007, 22:54

Quote:

Originally Posted by JIM C

Another issue is the T5 wheels will have a different offset being FWD going onto a RWD. Also I think the later P1800 with the correct PCD had disc brakes on the rear.

can't the offset be corrected using spacers? in which case the conversion rings might be the better bet as it'll be killing 2 birds with 1 stone so to speak

thanks for the info about the brakes

JIM C · Nov 2nd, 2007, 22:57

Yes, thats what I had thought too.
But I don`t know enough about the spacers.

Gordon Hunter · Nov 3rd, 2007, 09:25

Hi Pedro,

I'd look into conversion rings as you'd need to change the whole rear axle, hand brake set up, and change the flange over on the prop to diff to fit the later cars rear set up. Possibly other bits too.
I know that some may disagree, but I don't think that for the hassle involved there is much advantage either (certainly for road use) in changing over to rear disk brakes on an earlier P1800. This is taking for granted that your present system is in good working order.
I have some bolt on splines fitted to my '66 P1800 that enables it to take Mk 2 Jag wire wheels.
Any decent machine shop should be able to help you as long as you get your specifications right.

Let us know how you get on.

Gordon

Pedro Fandango · Nov 3rd, 2007, 09:37

cheers Gordon

it does sound alot of work to swop the rear axle, & as far as i know her current axle hasn't got any issues

i already know of a good machine shop (Chesman engineering) who will have no problem with making anything up. I've already got them lined up to make some wheel adaptors for BT once i can afford to get her new wheels

the current thinking is get 2 conversion rings made up for the front axle. & get the rear studs cut flush, & the drums redrilled with the new stud pattern. The drums should have enough surface area so the gap between the existing holes & the new ones shouldn't be enough to cause any weakness, i hope

many thanks people

davebslater(uk) · Nov 3rd, 2007, 10:09

i didnt think the p1800 was young enough to have any PCBs !.

i think the axle swap is easy enough - just a word of warning tho , redrilling the hubs can be done , as im finding out the wheel studs have a 16mm shank where they fit in to the hub on a 7/9 series axle (redrilling to ford) - and it gets really close to not being able to do it , so make sure you check disassemble and measure it before you go down that route .

barney paull-edwards · Nov 3rd, 2007, 10:19

Given a machine shop, its not a big problem, You will need a 35mm (?)plate,drilled T-5 PCD on one side and drilled P1800 on the other. Recess the P1800 side and fit T-5 studs(12x1.5 I think) on the other.Bolt on and go! The thickness of the plate is the difference in offset in order to compensate for wheel offset.

EJH · Nov 4th, 2007, 14:32

Probably no help at all, but I have just fitted a new set of gorgeous Minilite alloys to my '68 1800S. They are 1 inch wider than the originals, but bolt straight on. They are available from stock from Minilite and the original tyres can be re-used. They are not too expensive either at less than £100 each and are dead 'in period' being offered as an option back in the '60s. The standard saloon car wheels and hubcaps are a real dissappointment on a sports car. A decent set of alloys totally transform the look...?...!!:

JIM C · Nov 4th, 2007, 14:43

I could be tempted for my Amazon. I priced them a few months ago and for 4 wheels £411. Classy period wheels.

Nov 2nd, 2007, 22:43	#1
Pedro Fandango I've Been Banned Last Online: Apr 2nd, 2015 16:12 Join Date: Dec 2002 Location: can't remember	fitting T-5 wheels onto a P1800 (how can i change the PCB?) Hello after a lot of thinking & planning today i've decided the only wheels for Penelope are 850 T-5 alloys, but i know the PCB is wrong for the 1.8 P1800. How is best to change the PCB so they fit i believe 2.litre P1800's have the correct PCB for what i need, can i change the rear drums (are they on drums?) & front hubs so they fit? Can the existing hubs/drums simply be redrilled? Or would getting an engineering shop to make up some conversion rings be a better/cheaper option. Or are there any other ways i can get them to fit? many thanks Duane

Nov 2nd, 2007, 22:52	#2
JIM C Forum Support Team Last Online: Jul 4th, 2021 16:28 Join Date: Dec 2003 Location: Scotland View Photos By: JIM C	Another issue is the T5 wheels will have a different offset being FWD going onto a RWD. Also I think the later P1800 with the correct PCD had disc brakes on the rear. __________________

Nov 2nd, 2007, 22:57	#4
JIM C Forum Support Team Last Online: Jul 4th, 2021 16:28 Join Date: Dec 2003 Location: Scotland View Photos By: JIM C	Yes, thats what I had thought too. But I don`t know enough about the spacers. __________________

Nov 3rd, 2007, 10:09	#7
davebslater(uk) redbollock guru Last Online: Jun 30th, 2016 23:54 Join Date: Jan 1970 Location: lincoln	i didnt think the p1800 was young enough to have any PCBs !. i think the axle swap is easy enough - just a word of warning tho , redrilling the hubs can be done , as im finding out the wheel studs have a 16mm shank where they fit in to the hub on a 7/9 series axle (redrilling to ford) - and it gets really close to not being able to do it , so make sure you check disassemble and measure it before you go down that route . __________________ www.dbsmotorsport.co.uk

Nov 3rd, 2007, 10:19	#8
barney paull-edwards B.P-E Last Online: Dec 28th, 2007 21:12 Join Date: Jun 2007 Location: new Forrest	Wheel change. Given a machine shop, its not a big problem, You will need a 35mm (?)plate,drilled T-5 PCD on one side and drilled P1800 on the other. Recess the P1800 side and fit T-5 studs(12x1.5 I think) on the other.Bolt on and go! The thickness of the plate is the difference in offset in order to compensate for wheel offset.

Nov 3rd, 2007, 09:25	#5
Gordon Hunter Ex 1800 Register Keeper Last Online: Apr 29th, 2022 17:04 Join Date: Dec 2001 Location: Central Scotland	Hi Pedro, I'd look into conversion rings as you'd need to change the whole rear axle, hand brake set up, and change the flange over on the prop to diff to fit the later cars rear set up. Possibly other bits too. I know that some may disagree, but I don't think that for the hassle involved there is much advantage either (certainly for road use) in changing over to rear disk brakes on an earlier P1800. This is taking for granted that your present system is in good working order. I have some bolt on splines fitted to my '66 P1800 that enables it to take Mk 2 Jag wire wheels. Any decent machine shop should be able to help you as long as you get your specifications right. Let us know how you get on. Gordon

Nov 3rd, 2007, 09:37	#6
Pedro Fandango I've Been Banned Last Online: Apr 2nd, 2015 16:12 Join Date: Dec 2002 Location: can't remember	cheers Gordon it does sound alot of work to swop the rear axle, & as far as i know her current axle hasn't got any issues i already know of a good machine shop (Chesman engineering) who will have no problem with making anything up. I've already got them lined up to make some wheel adaptors for BT once i can afford to get her new wheels the current thinking is get 2 conversion rings made up for the front axle. & get the rear studs cut flush, & the drums redrilled with the new stud pattern. The drums should have enough surface area so the gap between the existing holes & the new ones shouldn't be enough to cause any weakness, i hope many thanks people

Nov 4th, 2007, 14:32	#9
EJH New Member Last Online: Dec 8th, 2008 13:02 Join Date: May 2007 Location: Nice	wheel change Probably no help at all, but I have just fitted a new set of gorgeous Minilite alloys to my '68 1800S. They are 1 inch wider than the originals, but bolt straight on. They are available from stock from Minilite and the original tyres can be re-used. They are not too expensive either at less than £100 each and are dead 'in period' being offered as an option back in the '60s. The standard saloon car wheels and hubcaps are a real dissappointment on a sports car. A decent set of alloys totally transform the look...?...!!: Last edited by EJH; Nov 4th, 2007 at 14:37.

Nov 4th, 2007, 14:43	#10
JIM C Forum Support Team Last Online: Jul 4th, 2021 16:28 Join Date: Dec 2003 Location: Scotland View Photos By: JIM C	I could be tempted for my Amazon. I priced them a few months ago and for 4 wheels £411. Classy period wheels. __________________

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