|
9 members (1854sailor, Simon, Ian Wegg, CLPlusFour, TalkMorgan, Themorganeer, MJF, Jon G4LJW, Grumpy2),
308
guests, and
32
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
Forums34
Topics48,343
Posts813,026
Members9,208
| |
Most Online1,046
Aug 24th, 2023
|
|
|
|
Joined: Jul 2011
Posts: 1,176 Likes: 17
Has a lot to Say!
|
Has a lot to Say!
Joined: Jul 2011
Posts: 1,176 Likes: 17 |
Interesting. My 4/4 occasionally hesitates with optimax but does not with blog standard 95 oct. Think Jays posted somewhere the sigma is set up for 95 Ron.
4/4 Ivory 4.1:1 axle, Mercedes A200 AMG
|
|
|
|
|
Joined: Jul 2011
Posts: 3,643
Talk Morgan Addict
|
|
Talk Morgan Addict
Joined: Jul 2011
Posts: 3,643 |
Roger, my Plus4 is only just over 3 years old. If I were in the market for a new Plus4 I would have no hesitation to have the GDI model.
Sense the slight envy.
Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016
|
|
|
|
|
Joined: Aug 2013
Posts: 5,210
Charter Member
|
|
Charter Member
Joined: Aug 2013
Posts: 5,210 |
Interesting. My 4/4 occasionally hesitates with optimax but does not with blog standard 95 oct. Think Jays posted somewhere the sigma is set up for 95 Ron. Are we saying then that there are no benefits to running the sigma engine on Optimax? I haven't used it yet but interested to know if there are any disadvantages to doing so if it's set up for 95?
|
|
|
|
|
Joined: Sep 2009
Posts: 7,342 Likes: 91
Talk Morgan Guru
|
|
Talk Morgan Guru
Joined: Sep 2009
Posts: 7,342 Likes: 91 |
My former Roadster had an interesting behave. She was much smoother and got more torque when filling with brand quality 98 octane fuel (Esso) instead of 95 octane. So I guess she could "read" the difference.
But when filling superior 102 octane (Aral) she delivered less power and less spontanious reaction on the throttle.
The new 4/4 reacts in my opinion in a positve way when filling with 98 octane, the engine runs smoother and deliveres slightly more torque. Worth a try.
You will damage nothing at all when doing so. The only downside is, when an engine cannot read the change of octane and consequently cannot alter the ignition timing, the only "damage" is a loss of money.
'14 4/4 graphite grey
|
|
|
|
|
Joined: Mar 2012
Posts: 201
L - Learner Plates On
|
|
OP
L - Learner Plates On
Joined: Mar 2012
Posts: 201 |
Further to my call to the factory last week concerning this thread had a call from Mark Ledington re assuring me of the health of the GDI engine they have had no problems with overheating or carbon build up and had just serviced a car having completed 40000 miles! While this was a Ford engine the ECU was Morgan and of course no turbo to complicate matters? Not being an engineer would the ECU affect carbon build up on the intake valves? I asked if I could get a duratec engine instead. While he did not say no he implied this would be very expensive due to new systems wiring up the new dashboard etc. So as I am trying a narrow bodied car to morrow I am hoping this does not speak to me! As this would be a 'head v heart ' issue! Maybe I should look for a used car or mod My 4/4. I am impressed by the factories response they seem very keen to forge links with customers! At the risk of quoting Mandy Rice Davies "well he would say that wouldn't he?" perhaps offering a warranty longer than the current period of two years would be a more tangible reassurance?
--------------------------------------
Regards
Bob
|
|
|
|
|
Joined: Aug 2013
Posts: 5,210
Charter Member
|
|
Charter Member
Joined: Aug 2013
Posts: 5,210 |
My former Roadster had an interesting behave. She was much smoother and got more torque when filling with brand quality 98 octane fuel (Esso) instead of 95 octane. So I guess she could "read" the difference.
But when filling superior 102 octane (Aral) she delivered less power and less spontanious reaction on the throttle.
The new 4/4 reacts in my opinion in a positve way when filling with 98 octane, the engine runs smoother and deliveres slightly more torque. Worth a try.
You will damage nothing at all when doing so. The only downside is, when an engine cannot read the change of octane and consequently cannot alter the ignition timing, the only "damage" is a loss of money. Thanks for that Heinz. I'm on vapours in the tank at the moment so next trip out I'll try the Optimax & see what happens.
|
|
|
|
|
Joined: Sep 2011
Posts: 14,723 Likes: 149
Member of the Inner Circle
|
|
Member of the Inner Circle
Joined: Sep 2011
Posts: 14,723 Likes: 149 |
I use Q8 Hi-Q premium diesel as much as possible because it is clearly the best in reducing the black exhaust smoke on hard acceleration. Q8 have just announced a new diesel they call Qwhite for trucks and another version for heating. It is said to significantly reduce harmful emissions and fine carbon emissions.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
|
|
|
|
|
Joined: Sep 2013
Posts: 1,118
Has a lot to Say!
|
|
Has a lot to Say!
Joined: Sep 2013
Posts: 1,118 |
Hey Peter you are right! Drove it, loved it now where's my cheque book?
Roger 4/4 Sand
RogT Old Git Racer ex 4/4 sand 2013
+4 GDI Royal Ivory 2015
Ford Fiesta ST2
|
|
|
|
|
Joined: Sep 2014
Posts: 2,272 Likes: 7
Talk Morgan Expert
|
|
Talk Morgan Expert
Joined: Sep 2014
Posts: 2,272 Likes: 7 |
Deposits on inlet valves are nothing new. Back in the 80s when I was trying to interest oil companies in using ethanol as a blend stock for their gasoline pool, the was a test for this, it is on of the longer German words I know
MercedesBenzEinlassVentilenSauberkeitsPrufung
Trying that after a few glasses of the red stuff!
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
|
|
|
|
|
Joined: Jul 2007
Posts: 28,416 Likes: 178
Salty Sea Dog Member of the Inner Circle
|
|
Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,416 Likes: 178 |
My friendly garage owner showed me a Peugeot 207 diesel engine that was complete coked up after 30,000 miles. He explained that the source of the problem was taking the worst emissions from the exhaust and reintroducing them into the combustion system. Combine this with careful driving and coking is the result.
These engines need to be driven hard as someone else has stated above. I thought all French cars had been designed to be driven as if being chased by the Les Gendarmes??? 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'09 Gen2 MINI Cooper ragtop
'90 LR 90 SW
|
|
|
|
|
