UKSaabs

THE site for UK Saab people!
It is currently Thu Aug 06, 2020 9:27 am

All times are UTC





Post new topic Reply to topic  [ 61 posts ]  Go to page Previous  1, 2, 3, 4  Next
Author Message
PostPosted: Sun Jan 12, 2020 8:27 am 
Offline
Full Pressure Turbo
User avatar

Joined: Sat Jan 20, 2007 5:21 pm
Posts: 954
Location: wiltshire
GeoffR wrote:
I have heard of shutting down cylinders on a Diesel engine but never on a petrol engine.

Mercedes-AMG did it back in 2012 with their 5.5L V8 for the SLK55, cylinders 2,3,5 and 8 would cut off under partial load, employing similar technology to that of their F1 engine at the time.

I've not seen it for any other manufacturer though, and I don't think it was a long lived technology for AMG or Mercedes.

_________________
All Saabs now gone, presently driving a Mercedes-AMG C43


Top
 Profile  
 
PostPosted: Sun Jan 12, 2020 8:39 am 
Offline
UKS Addict
User avatar

Joined: Thu Feb 14, 2008 10:47 am
Posts: 7007
Location: Queenborough, Kent
Car Models: 9k, 9-5 Aero & a Jaaag
I believe Lexus had it on their 5 litre V8’s, certainly on cars from around 2008?

EDIT: it was a LS460L, a 4.6 litre V8. The owner told me about the cylinder shutdown technology, saying that they got over 30MPG on a run - but I can’t find anything to confirm that they do have it ...

_________________
'98 9000 2.3T CSE, stage 3
'04 9-5 Aero manual, stage 3
'08 Jaguar XFR


Top
 Profile  
 
PostPosted: Sun Jan 12, 2020 9:04 am 
Offline
UKS Addict
User avatar

Joined: Sun Oct 15, 2006 7:02 pm
Posts: 8246
Location: Reading, Saabshire.
Car Models: 97 9000 Aero 2.3T
sounds wrote:
I believe Lexus had it on their 5 litre V8’s, certainly on cars from around 2008?

EDIT: it was a LS460L, a 4.6 litre V8. The owner told me about the cylinder shutdown technology, saying that they got over 30MPG on a run - but I can’t find anything to confirm that they do have it ...


Dont think thats especially good mpg for a V8.
My 88 Chevrolet Camaro Z28 IROC-Z, with TPI would do 30mpg on long motorway runs and it never had that fancy tech.
But then again it did 70mph at 1,600 rpm. At 2000 you were just over 80 !.

_________________
92 9000 CSE 2.0T TD04, Street Terrorist.
97 9000 Aero 2.3T JulesTune Stage 2+
08 Astra 1.8 Elite


Top
 Profile  
 
PostPosted: Sun Jan 12, 2020 9:46 am 
Offline
UKS Addict
User avatar

Joined: Wed Apr 16, 2014 12:26 pm
Posts: 4851
Location: South Oxfordshire
Car Models: 2008 9-3ss Aero 2.0T; 1971 VW Beetle 1300; 2013 VW Shuttle (T5) WAV
Paul Taylor wrote:
sounds wrote:
I believe Lexus had it on their 5 litre V8’s, certainly on cars from around 2008?

EDIT: it was a LS460L, a 4.6 litre V8. The owner told me about the cylinder shutdown technology, saying that they got over 30MPG on a run - but I can’t find anything to confirm that they do have it ...


Dont think thats especially good mpg for a V8.
My 88 Chevrolet Camaro Z28 IROC-Z, with TPI would do 30mpg on long motorway runs and it never had that fancy tech.
But then again it did 70mph at 1,600 rpm. At 2000 you were just over 80 !.
Let's not forget your particular skill for achieving good mpg figures, it's not just down to the car or engine.

_________________
9-3ss SOC Registrar @BHOSaab

2007(57) 9-3 Aero 2.0T
1971 (K) VW Beetle 1300
2013(63) VW T5


Top
 Profile  
 
PostPosted: Sun Jan 12, 2020 11:08 am 
Offline
UKS Addict

Joined: Thu Mar 31, 2011 11:46 am
Posts: 5591
Location: suffolk
Car Models: 1993 9000 2.0 cse
Let's not forget your particular skill for achieving good mpg figures, it's not just down to the car or engine

hes a secret hyper miler i reckon
hes had french cars enough said
learning to corners really good for mpg
being in the right gear helps not that alot of people know that
not saying pauls one of them who dont know by the way

made me laugh when they spoke of the new ecotec mustangs coming here and them being economical

30.7mpg
The most efficient and cheapest-to-run version of the Mustang is the entry-level 2.3 EcoBoost
with a six-speed manual gearbox.
It's still not great, however, with official tests promising average fuel economy of
31.3mpg. Choose an automatic gearbox and this drops to just 30.7mpg.

_________________
never underestimate the predictability of stupidity


Top
 Profile  
 
PostPosted: Tue Jan 14, 2020 10:31 pm 
Offline
Saab Nut
User avatar

Joined: Thu Jul 28, 2011 5:21 pm
Posts: 1891
Location: Ashford, Kent
Car Models: 2x 9000 & 9-5
Paul Taylor wrote:
wow, 31mpg, thats working out well then.
A 9000 Aero can clear 40mpg without even trying.
And im using my wifes old Astra 1.8 automatic at the moment and thats doing a steady 37mpg average.

3Cyls, lol
This is a real problem! I've spent ages looking at other 90's/00's performance cars, both N/A and turbocharged 4 pots, that struggle to match the 9000's fuel efficiency and in many cases can't match it's performance. Hence why I've now more or less settled on a 9000 again.

Topically one of the cars I looked at was the older Accord Type R with the ~210bhp 2.2. While it was great fun and loved to be driven properly, and was even quite nice to cruise in, the mpg was comparatively poor.

Sent from my SM-G960F using Tapatalk

_________________
'75 Vauxhall Viva - '91 Eunos Roadster - '91 Mini - '94 SAAB 9000 - '97 SAAB 9000 - '08 SAAB 9-5 TiD


Top
 Profile  
 
PostPosted: Wed Jan 15, 2020 7:10 am 
Offline
UKS Addict
User avatar

Joined: Sun Oct 15, 2006 7:02 pm
Posts: 8246
Location: Reading, Saabshire.
Car Models: 97 9000 Aero 2.3T
oli8925 wrote:
Paul Taylor wrote:
wow, 31mpg, thats working out well then.
A 9000 Aero can clear 40mpg without even trying.
And im using my wifes old Astra 1.8 automatic at the moment and thats doing a steady 37mpg average.

3Cyls, lol
This is a real problem! I've spent ages looking at other 90's/00's performance cars, both N/A and turbocharged 4 pots, that struggle to match the 9000's fuel efficiency and in many cases can't match it's performance. Hence why I've now more or less settled on a 9000 again.

Topically one of the cars I looked at was the older Accord Type R with the ~210bhp 2.2. While it was great fun and loved to be driven properly, and was even quite nice to cruise in, the mpg was comparatively poor.

Sent from my SM-G960F using Tapatalk


Snap, ive got another one as well... same reason.
I think alot also has to do with the 9000 CS shape. Modern ares are so square and blocky. My little A class AMG included.
They are side by side in the drive at the moment, and the 9000 is low and sleek compared to the A class.
Its also relatively small compared to modern cars too. What was once a "Large Executive car", is now smaller than a Mini or Fiat 500 !.

_________________
92 9000 CSE 2.0T TD04, Street Terrorist.
97 9000 Aero 2.3T JulesTune Stage 2+
08 Astra 1.8 Elite


Top
 Profile  
 
PostPosted: Wed Jan 15, 2020 7:14 am 
Offline
UKS Addict
User avatar

Joined: Sun Oct 15, 2006 7:02 pm
Posts: 8246
Location: Reading, Saabshire.
Car Models: 97 9000 Aero 2.3T
TwyRob wrote:
Paul Taylor wrote:
sounds wrote:
I believe Lexus had it on their 5 litre V8’s, certainly on cars from around 2008?

EDIT: it was a LS460L, a 4.6 litre V8. The owner told me about the cylinder shutdown technology, saying that they got over 30MPG on a run - but I can’t find anything to confirm that they do have it ...


Dont think thats especially good mpg for a V8.
My 88 Chevrolet Camaro Z28 IROC-Z, with TPI would do 30mpg on long motorway runs and it never had that fancy tech.
But then again it did 70mph at 1,600 rpm. At 2000 you were just over 80 !.
Let's not forget your particular skill for achieving good mpg figures, it's not just down to the car or engine.


Dont think i have a particular skill.
When Eco driving (for work), i just keep as constant speed as possible. Read ahead and make judgements where not to loose speed etc.

Yesterday on the M4 people were doing my head in on the 50mph section.
One min doing, 50, the next 42, then 46, then 50. Then back to 43 ish again. Why !!!!!!!!. Why the hell can you not keep a constant speed. Im going 50 on cruise.
Then they go over 50, over take you !, and pull back in and drop to 46. what !!.. Seriously... :loco:

_________________
92 9000 CSE 2.0T TD04, Street Terrorist.
97 9000 Aero 2.3T JulesTune Stage 2+
08 Astra 1.8 Elite


Top
 Profile  
 
PostPosted: Wed Jan 15, 2020 7:51 am 
Offline
UKS Addict

Joined: Thu Sep 01, 2005 5:31 am
Posts: 5249
Location: Bucks
Car Models: Saab NG 9-5 Aero
Paul Taylor wrote:
Yesterday on the M4 people were doing my head in on the 50mph section.
One min doing, 50, the next 42, then 46, then 50. Then back to 43 ish again. Why !!!!!!!!. Why the hell can you not keep a constant speed. Im going 50 on cruise.
Then they go over 50, over take you !, and pull back in and drop to 46. what !!.. Seriously... :loco:

Blame the average speed cameras, up to 52, then down to 48 to compensate and end up with an average of 50.


Top
 Profile  
 
PostPosted: Wed Jan 15, 2020 9:08 am 
Offline
UKS Encyclopædia G-M
User avatar

Joined: Sun Aug 15, 2004 9:39 am
Posts: 41851
Location: SW Herts
Car Models: 2007 9-5 Aero est. 300hp Hirsch. 9-3 2010 9-3 Carlsson
Modern cars are "square and blocky" because pedestrian safety legislation now requires 100mm (4 inches) of clear airspace between the underside of the bonnet and the top of the engine. Safety legislation on side impact has also made cars wider.

_________________
.
.
.
.
Everything will be OK in the end. If it's not OK, it's not the end...


Top
 Profile  
 
PostPosted: Wed Jan 15, 2020 10:46 am 
Offline
UKS Addict
User avatar

Joined: Fri Feb 10, 2012 9:22 am
Posts: 7892
Location: West Sussex
Car Models: Not a Saab
Same dilemma here.
Keep the 9000 or go more modern. But all the newer luxo barges with a bit of oomph are too complicated and heavy.
Skoda Superb 3.6 V6 has 260bhp but only managed 28mpg

_________________
Hobby 750 Motorhome
2011 Toyota IQ
2016 Smart 900 turbo
2009 Lexus GS450h


Top
 Profile  
 
PostPosted: Wed Jan 15, 2020 11:59 am 
Offline
UKS Addict

Joined: Wed Apr 11, 2012 11:33 am
Posts: 4002
Location: Colerne North Wiltshire
Car Models: GSXR1000 K2 Aero vert gone
Paul Taylor wrote:

Dont think i have a particular skill.
When Eco driving (for work), i just keep as constant speed as possible. Read ahead and make judgements where not to loose speed etc.

Yesterday on the M4 people were doing my head in on the 50mph section.
One min doing, 50, the next 42, then 46, then 50. Then back to 43 ish again. Why !!!!!!!!. Why the hell can you not keep a constant speed. Im going 50 on cruise.
Then they go over 50, over take you !, and pull back in and drop to 46. what !!.. Seriously... :loco:


We have all been there, unfortunately not everyone drives perfectly, I certainly don't. C'est la vie.

_________________
Four wheels good two wheels better


Top
 Profile  
 
PostPosted: Wed Jan 15, 2020 12:41 pm 
Offline
UKS Addict
User avatar

Joined: Fri Feb 10, 2012 9:22 am
Posts: 7892
Location: West Sussex
Car Models: Not a Saab
Re the 50mph thing.
My sat nav has the average speed over the duration of the works, so as long as it is showing 50 I can vary my speed within the section to overtake or annoy Paul

_________________
Hobby 750 Motorhome
2011 Toyota IQ
2016 Smart 900 turbo
2009 Lexus GS450h


Top
 Profile  
 
PostPosted: Wed Jan 15, 2020 1:07 pm 
Offline
UKS Addict

Joined: Thu Sep 01, 2005 5:31 am
Posts: 5249
Location: Bucks
Car Models: Saab NG 9-5 Aero
mossypossy wrote:
Re the 50mph thing.
My sat nav has the average speed over the duration of the works, so as long as it is showing 50 I can vary my speed within the section to overtake or annoy Paul

Which is great but my built-in one doesn't, I use cruise set to 50 instead, and many people don't use either Sat Nav or Cruise control. I suspect it is the latter who cause the problem.


Top
 Profile  
 
PostPosted: Fri Jan 17, 2020 5:31 pm 
Offline
UKS Veteran
User avatar

Joined: Wed Sep 13, 2006 12:44 pm
Posts: 13238
Location: Bristol
Car Models: '59 2.8 XWD '55 Diesel SW
Bugatti Veyron has a switch for whether you want to use the full W16, or just half of it (which is then "just" a twin turbo V8).

_________________
UKSaabs Fantasy Formula 1 Freak
Federation of Master Bodgers Accredited
T5 Tuner


Top
 Profile  
 
PostPosted: Fri Jan 17, 2020 7:10 pm 
Offline
UKS Addict

Joined: Thu Sep 01, 2005 5:31 am
Posts: 5249
Location: Bucks
Car Models: Saab NG 9-5 Aero
Jules_ht wrote:
Bugatti Veyron has a switch for whether you want to use the full W16, or just half of it (which is then "just" a twin turbo V8).

I'll try to remember that next time I get my hands on one :D


Top
 Profile  
 
PostPosted: Sat Jan 18, 2020 8:23 am 
Offline
UKS Veteran
User avatar

Joined: Wed Jul 02, 2008 6:09 pm
Posts: 11092
Location: Sandwich
Car Models: 2005 9-5 Aero Wagon
Set my cruise to 53 mph on the clock through ave speed sections on the basis of reading high. Don't have the luxury of Sat nav and not had a ticket yet.

_________________
9-5 Aero Estate 2005 in grey
9000 Aero 1995 in black
1994 GM 900
1987 9000 16V S Turbo


Top
 Profile  
 
PostPosted: Sat Jan 18, 2020 8:35 am 
Offline
Light Pressure Turbo
User avatar

Joined: Wed Dec 30, 2009 7:40 pm
Posts: 519
Location: Suffolk
Car Models: 9-3 Aero 2003 Noobed
Paul Taylor wrote:
Yesterday on the M4 people were doing my head in on the 50mph section.
One min doing, 50, the next 42, then 46, then 50. Then back to 43 ish again. Why !!!!!!!!. Why the hell can you not keep a constant speed. Im going 50 on cruise.
Then they go over 50, over take you !, and pull back in and drop to 46. what !!.. Seriously... :loco:

It's one way to annoy tailgaters!! :D


Top
 Profile  
 
PostPosted: Sat Jan 18, 2020 9:57 am 
Offline
UKS Addict
User avatar

Joined: Sun Oct 15, 2006 7:02 pm
Posts: 8246
Location: Reading, Saabshire.
Car Models: 97 9000 Aero 2.3T
mossypossy wrote:
Same dilemma here.
Keep the 9000 or go more modern. But all the newer luxo barges with a bit of oomph are too complicated and heavy.
Skoda Superb 3.6 V6 has 260bhp but only managed 28mpg


When me and the Mrs both had Renault Laguna II 3.0 V6 VVT's. They would do 40 to 41mpg average on my frequent runs from berkshire to essex using the speed limiter set to 73.
Urban only driving which is what her in-doors does resulted in 25mpg average.
Unfortunately as lovely as that L7X engine is to use. It revs out to 7000 and makes a glorious noise with an open air-intake. Its plastic rocker covers were a nightmare. Always leaking oil. And now Renault/Pug/Citroen no longer make spares for that engine. Even though they only dropped it in 2006 after moving to the Nissan 3.5 engine.

_________________
92 9000 CSE 2.0T TD04, Street Terrorist.
97 9000 Aero 2.3T JulesTune Stage 2+
08 Astra 1.8 Elite


Top
 Profile  
 
PostPosted: Sat Jan 18, 2020 10:01 am 
Offline
UKS Addict
User avatar

Joined: Sun Oct 15, 2006 7:02 pm
Posts: 8246
Location: Reading, Saabshire.
Car Models: 97 9000 Aero 2.3T
Mike9000Aero wrote:
Set my cruise to 53 mph on the clock through ave speed sections on the basis of reading high. Don't have the luxury of Sat nav and not had a ticket yet.


Doing similar with my wifes Astra at the moment. 56 On the speedo is bang on 50 on the phone GPS. (google maps).
It has standard wheels / tyres too. 6 Mph is a pretty poor error for a newish car ?.

I shall never forget my dads only Rover SD1 when i was a little boy. The speedo dial would flap around in the breeze, basically anywhere it liked. So you had to guestimate what you were doing.

_________________
92 9000 CSE 2.0T TD04, Street Terrorist.
97 9000 Aero 2.3T JulesTune Stage 2+
08 Astra 1.8 Elite


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 61 posts ]  Go to page Previous  1, 2, 3, 4  Next

All times are UTC


Who is online

Users browsing this forum: Nisnool and 16 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group

follow UKSaabs on Twitter



UKSaabs silhouette logo images by Mark Green www.greenphotos.com
"subsilver2" slightly bodged by UKSaabs for our own use.

:: Disclaimer ::
Comments posted here are the views of their individual authors and are not necessarily shared by the owners of this Web site.
Authors assume all responsibility for comments posted here.

UKSaabs The biggest and best privately owned UK based independent Saab forum for all SAAB enthusiasts.
Whilst we encourage our users to support our advertisers the site wishes to remain independent and therefore does not endorse any particular advertiser(s)
UKSaabs is not affiliated with Saab Cars UK or Saab Automobile AB