Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) 3.7 roadster - any known issues? and Battery life

This was said about the injection on TR6's (I have had several) however one specialist originally sorted out a solution and corned the market - there are now several specialist's and indeed technology is now moving the set-up to new levels....

Once someone realises that this can be "sorted" this person will have the 3.7 Morgan Roadster rev-hang fix...market to themselves. Several 100 cars in UK alone (that is a guess) makes a mod worthwhile?

Indeed... I would have thought that would have been possible!

I probably would have bought a 3.7 Roadster if the rev hang issue had not been there. The 3.0 was much nicer to drive without this issue.

Perhaps I am too late with this information respectively posting this link and you all are aware of it.

http://www.revhang.altervista.org/
In my view an interesting read about the issue and the possible solution of rev hang.

In the last post of this thread the guy tells the costs.
http://www.ozhonda.com/forum/showthread.php?187455-Rev-hang-a-curse-or-blessing/page2


I have no connection to him and I do not know if it works properly, but it could be an elegant solution by not altering anything else at the engine or the ECU.
I have sympathy with all drivers who suffer from rev hang because my 2008 Roadster, even with cable TB, was a pain before I got a new ECU under warranty therefore my interest in this topic to help to find a solution for you 3.7 Roadster drivers.

Makes for very interesting reading Heinz

Thanks for posting

Thanks Heinz for the article on rev hang. I had not seen this before.
The final sentence in ‘What is the effect of rev hang’ sums up exactly what I experienced when unknowingly driving over oil dropped on to a wet carriageway.
Essentially the ECU takes control and the driver becomes a passenger with the engine screaming for a few seconds until the ECU permits the revs to die.
A potentially lethal situation.

Well I will soon get a chance to drive a 2019 3.7 Roadster as soon as the Roadster gets here from Panama and engine from Nova Skotia. Talk about "Rev Hang". BTW: My guess is the Owner, a accomplished Morgan Race Driver, will adapt and to Him will not be a problem. I will report the results later.

Thanks for your post, Heinz.

I wasn’t aware that the rev-hang issue was so widespread.

I can’t deny the presence of a certain amount of rev-hang on my 3.7 Roadster when giving it some serious welly, but under normal driving conditions, which is probably 90% of the time, it’s an absolute joy to drive. Very relaxed (for a Morgan), but quite exciting and intoxicating when required. As Stringers Best Mate says, it’s a real Jeckyll and Hyde machine.

When you want to play at being a bit of a hooligan, with a bit of mechanical sympathy and careful consideration for road conditions it can be great fun. In the wet it does demand respect, much like my previous Caterham and 911 did, so I’m very conscious of the need for due diligence and don’t even think of giving it loads of revs if the roads are wet, it’s just a case of adapting to the conditions.

I also have to be a bit more careful when the good lady wife is in the car, as if I'm having a bit of a play she'll give me the death-stare and say "Was that really necessary?" The silly grin on my face doesn't always have the calming effect I'd hoped for.

I know this well.....

James

I think you will be surprised at his 'adaptation' report...

In an ideal world, the gearing of most cars will enable the change up to the next gear made at the maximum power point, usually near max RPM, to drop straight into the 'max torque' point of the next gear... and so on. Close ratio gearboxes being an exception. The issue with the 3.7 is that a change up made at max RPM, will only drop the revs to a point that is considerably above where the RPM would be in the next gear. So this causes the annoying and uncomfortable driveline 'shunt'.

Of course this can be driven around by 'waiting' with the clutch still depressed, for the rev hang to cease and the revs fall to that point... the wait may only be less than a second or so, but doing that very much interrupts 'spirited driving' with smooth rapid gear changes. Certainly not the quickest way to get around!