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Aug 24th, 2023
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Joined: Aug 2020
Posts: 2,793 Likes: 161
Talk Morgan Expert
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OP
Talk Morgan Expert
Joined: Aug 2020
Posts: 2,793 Likes: 161 |
I wouldn't go much over 24 psi. Why not try 0.5 psi increments. I run my Roadster at 23.5 front & 26 rear but it is much heavier with wider tyres. Yes it looks like I'll have to experiment more with the tyre pressures, hopefully enough people will chip in to reduce the extent of my trial and error saga........... regards John
Prev '12 Plus 4 Sport OZZY
'08 Roadster FELIX
'06 4/4 70th LOKI
'77 4/4 SEAMUS
'85 4/4 MOLLY
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Joined: Jul 2007
Posts: 26,759 Likes: 424
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 26,759 Likes: 424 |
Of course it also depends on the calibration of the gauge and the have r and r.
I would stick with one gauge to reduce errors.
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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Joined: Jan 2018
Posts: 363 Likes: 7
Learner Plates Off!
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Learner Plates Off!
Joined: Jan 2018
Posts: 363 Likes: 7 |
Hi John, Yes I love the Harley and the Morgan, I wouldn't part with either  I must admit I was suprised when New Elms suggested 20 psi, they had fitted the new suspension and then went out on a road test and came back with that as the recommended setting. I tweeked it back up to 22 psi over the following few weeks and realsied they were right and dropped it back down again. This is all very different to a motorcycle where its best to stick to the manufactures suggested pressures. That said, with Avon motorcycle tyres you usually add 5 psi ontop of the OE recommended pressure so maybe nothing changes after all  Best try it and see which you prefer, we are all different as you see so often on here!
Paul
2009 4/4 Sport in Red
2022 Harley Davidson FXLRS Low Rider S
1974 Honda CB450K7
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Joined: Aug 2020
Posts: 2,793 Likes: 161
Talk Morgan Expert
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OP
Talk Morgan Expert
Joined: Aug 2020
Posts: 2,793 Likes: 161 |
Of course it also depends on the calibration of the gauge and the have r and r.
I would stick with one gauge to reduce errors. That made me smile and reminded me so much of the need for consistency of measurement......whenever the nurse took my blood pressure it was always lower than when my Doctor did, they both use different machines..........so I agreed with my Doctor that we would measure any change over time based on just using the one machine readings......so it didn't really matter how accurate it was, (except for my actual state of health) it would still measure change. regards John
Prev '12 Plus 4 Sport OZZY
'08 Roadster FELIX
'06 4/4 70th LOKI
'77 4/4 SEAMUS
'85 4/4 MOLLY
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Joined: Dec 2008
Posts: 21,871 Likes: 168
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 21,871 Likes: 168 |
I'm in the 23-25psi range usually. 25 feels harder than 22, but it might just be imagination.
Bear in mind the different tyre sizes and engine weights.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Jul 2019
Posts: 922
Talk Morgan Regular
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Talk Morgan Regular
Joined: Jul 2019
Posts: 922 |
I’m tempted by the brake reaction bars and will probably go for those next year. My overall ride was much improved by fitting 205 65 15 tyres that raised the car up a little and provided an extra 1cm or so of cushioning over the 195 60 originals. This new size affords the possibility to reduce the pressures down to 22 psi which feels just dandy.
Kevin
2009 Morgan Plus 4 - 4 seater
2015 Subaru Forester 2.0ltr
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Joined: Aug 2020
Posts: 2,793 Likes: 161
Talk Morgan Expert
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OP
Talk Morgan Expert
Joined: Aug 2020
Posts: 2,793 Likes: 161 |
I’m tempted by the brake reaction bars and will probably go for those next year. My overall ride was much improved by fitting 205 65 15 tyres that raised the car up a little and provided an extra 1cm or so of cushioning over the 195 60 originals. This new size affords the possibility to reduce the pressures down to 22 psi which feels just dandy. That's very interesting, the 70th anniversary 4/4 came standard with steel wheels, mine being a post 1970 celebration model came with the rarely fitted spoke wheels ( as only fitted to 4/4's after 1970) and possibly it may have a plus 4 front wings as my wires do not fill the wing, they look quite narrow and I've been contemplating getting the wider wire wheel if it will fit. My car would certainly benefit with a slightly improved height but I need to balance the extra steering weight as I have a very tight turning circle to get my car reversed into the garage. So far the reaction bars definitely seem to lessen the suspension crashes and smooth out undulations, the compromise'trade off is that they can restrict/rub on full lock. regards John
Prev '12 Plus 4 Sport OZZY
'08 Roadster FELIX
'06 4/4 70th LOKI
'77 4/4 SEAMUS
'85 4/4 MOLLY
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Joined: Sep 2014
Posts: 989
Talk Morgan Regular
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Talk Morgan Regular
Joined: Sep 2014
Posts: 989 |
John regarding rubbing on the reaction bars, you may find application of tyre shine type product/tyre gel/silicon on the inner sidewalls will stop the rubber tending to snag up on the bars on full lock.
I have tried lots of tyre pressures on my 4/4 - 26psi all round is my happy spot ( still running the factory contis) as i like a nimble feel. I don't think there is a right or wrong pressure but too little will stress the sidewalls and lead to spongy handing/feel. Too high of course could be dangerous - but a bit of common sense in how it feels on the road should suffice. I started at 30 psi and worked backwards to find my preferred setting.
2015 Morgan 4/4 (Wolf fettled) previously 2014 M3W
MINI Cooper S and numerous BMC/BL relics.
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Joined: Apr 2019
Posts: 895
Talk Morgan Regular
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Talk Morgan Regular
Joined: Apr 2019
Posts: 895 |
I was thinking of getting the Sifab Panhard rod fitted at the same time, but decided that I wanted to understand the relative changes to the car in stages of hopefully noted improvement. There is lots of 'sage' advice on here on suggested improvements, I just wanted to pick my own way through it all.........some are minor improvements, others can give a step change and I wanted to try and understand that for myself. It's now clear to me that brake reaction bars (all other things being equal) are a step change for the front end and chassis ride for a very small outlay.
I hadn't checked the tyre pressures since I got them replaced in September (even though I told the fitters it was 22psi and their boss has a Morgan) Matt noted they were at 30psi which he lowered to 22psi. I actually found the car felt more planted at the back with the higher pressures....now this may be a subjective feel and with the tightened front end its now showing the back end up...I'll wait till I get the Panhard rod done and then (if necessary) start playing with tyre pressures.
Agree John, I fitted the BRBs before the Panhard Rod (though bought both at the same time) because I wanted to see what difference the BRBs made on their own. Maybe if I hadn't already bought the Panhard Rod I would have been happy with just the BRBs. My initial reaction to fitting the Panhard Rod was that it had made the rear suspension firmer but I think it is tauter rather than firmer suspension due to being better located. The handling is better overall with the Panhard Rod with the added benefit that there is more feel to the steering because of less lateral movement at the rear. I changed my Contis due to being 7 years old to T Trac2s and I also have AVO Rutherford adjustable shocks, so I have a range of adjustments to explore without even experimenting with Tyre pressures!
Rob
4/4 Sport Grey
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Joined: Aug 2020
Posts: 2,793 Likes: 161
Talk Morgan Expert
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OP
Talk Morgan Expert
Joined: Aug 2020
Posts: 2,793 Likes: 161 |
Many thanks for all the kind contributions
regards
Prev '12 Plus 4 Sport OZZY
'08 Roadster FELIX
'06 4/4 70th LOKI
'77 4/4 SEAMUS
'85 4/4 MOLLY
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