Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) 3.7 l Roadster advice please

Having got the beast today it started to loosen up well on the way home , the PO had done 500 miles in 2 years.
My biggest concern is judging the speed. Has anyone worked out the revs in top or other gears for 30, 40, 50, 60 & 70? Following the traffic on the "smart" M25 I was doing roughly 65 it seemed.

The box improved once used and rev hang wasn't an issue but it does have the ECU upgrade.
1st seems a waste of time in normal traffic & 6th is not so reactive at 70 as my old 5 speed S1.

That's about right..

I always used the SatNav for speed especially with the tonneau cover fitted (still for sale BTW..) but about 2500 was 70 I think. In top. Can't say I remember what the revs were looking like flat out, though. Thought it best to keep looking ahead..!!

Incidentally, if you Google The Brooklands Belle, there are plenty of images on the web for you..

Its all here John with speeds @ max 6850rpm.



Note this is for my car though with 16" wires and 205/55/R16 tyres. I believe yours has 15" rims and slightly taller 60% profile tyres so will be similar

I can give you the Excel file if you wish so you can insert your own revs/mile for greater accuracy.

ETA: FWIW your driving impressions concur perfectly with mine. Rarely use first and to expidite motorway overtaking you need to change down a gear or two as 70mph is only just over 2000rpm. 6th can give you 33 real mpg (remember the digital readout is US mpg) though.

John, yes I agree with you comments re 1st & 6th, I use a head up display of speed which takes a signal off the OBD2 port as the speedometer is a pain to read accurately

Cheers guys

I have a digital speedo sitting on the steering wheel cowl right in front of me ,it Runs from the OBD port is also adjustable To get the accurate speed .I got the accurate reading from the sat nav And adjusted it as the Factory speedo runs 7 mph fast at 70 .
It also gives a selection of engine temp ,voltage ,revs ,audible speed settings ,and other things .I don’t use the Factory speedo any more .Total cost £20.00 From eBay .
Superb piece of kit .

That would make sense. Mine seemed c 7 mph slow at 70.

I agree with the above, I also run the same as Peter & Jon , an excellent investment, having been caught doing 34 in 30 by The cameras

Mine is on order. Have asked Bell & Colvill if the speedo can be recalibrated.

I've used in the past an OBDII Bluetooth dongle linked to OBD Check app on my Android phone.



Impressive to see all the dials light up when you start engine. You also get max and min dial markers for each session.

The Speedo on my car, what you can see of it and allowing for parallax, seems reasonably accurate.