|
BamfordMike
440 posts
26 months
|
yeti said: Mike, looking at the engine above, the plenum chamber - can it be re-manufactured for the different engine size I will have i.e. can I see '6.5' when I open the bonnet? Just curious  The block isn't even 'hot off the press' at 6.5L displacement and we are already onto re-branding A special engine requires a special stamp - both its name and number will be reflected...! On the subject of subtle branding changes; courtesy of PH member Flinder this more than any other would apply to your car  Although will look a bit different to this as you look set to exceed the current numbers in the BR badge range...!
|
|
|
Tony V12V
1,310 posts
21 months
|
BamfordMike said: Very interesting and enlightening 'stuff' PLUS
To give a deeper exhaust note that is a touch louder, keeping the bypass function and the benefit that gives, all I would suggest doing as a first step would be to fit low loss main catalysts and see if that meets your demands - much cheaper than an aftermarket silencer and gives a performance gain too.
Cake and eat it; bypass valves kept and loud exhaust, plus cherry on top; extra power....!!! Hi Mike obviously the above would also apply to the V12V. Are you currently offering low loss cats or have I read somewhere that it is still 'work in progress' for a V12V. Thanks Tony
|
|
|
jakesmith
380 posts
40 months
|
Does the sportshift transition get through clutches less frequently, ie does its mechanical actuation prevent the slippage and other misuses that can cause low milage failure? And in replacement can it be exchanged for Bamford's £3k up rated clutch? Thanks.
|
|
|
Stefanolux
87 posts
15 months
|
Dear Sir, as a new owner of a DB9 Volante MY 2007, yesterday I joined PH where I could find very interesting subjects. In fact, while being very happy about my "new" car (after 23 years of Porsche), I take the opportunity of ssarwar001 question to ask if it is normal that the SAT Nav screen is almost unreadable in daylight: when switching it on, the screen opens slowly and apparently illuminated and then - at half way - becomes so dark that it is almost impossible to read it in daylight. Of course, I tried the different alternatives available in the program (contrast, lighter, darker) but with no satisfactory result. From your reply, I understand that a "night screen" might come in: is it possible that the "night screen" comes on even during daylight and with lights off? Any suggestion to a DIY fan: can I test any remedy? Thanks in advance for your kind attention (servicing in Luxembourg is very, very expensive!!!) Regards. ssarwar001 said: Hi
I have a DBS 2008 and am having problems with the SAT Nav scree. It keeps changing colour (mainly blue but does go black as well)
Ive taken it to main dealer as the car is under warranty but they can't seem to find fault and seem unwilling to replace the screen given its something that has already been done previously. I'm concerned my main dealer warranty is due to expire soon and under an extended warranty this decet is not covered - have you seen this issue before???
|
|
|
Stonic
110 posts
17 months
|
Suggest you try the "dimmer" switch to the right of the main headlight switch. Not only does it adjust the brightness of the instruments but also the satnav screen. Should be an easy solution if not I suspect a trip to dealer is needed.
|
Advertisement
|
|
|
Stefanolux
87 posts
15 months
|
Thanks a lot. In fact, it works: dimmer was quite "low". Tomorrow morning, I hope I'll get the confirmation. May I ask you another question? The ramp of my garage being quite steep, the front bumper "touches" the floor, for 30/40 cm., on a 20/30 cm width, in spite of my thorough calculations when adjusting the slope of the ramp (and winter tyres, lower by 8mm., do not help!). Is there any way to raise the front bumper by 1,5-2,0 centimeters, maybe by a trig/wedge in the front suspensions? Again thanks a lot for kind attention. Stonic said: Suggest you try the "dimmer" switch to the right of the main headlight switch. Not only does it adjust the brightness of the instruments but also the satnav screen. Should be an easy solution if not I suspect a trip to dealer is needed.
|
|
|
MichaelV8V
506 posts
130 months
|
There is a 'screen saver' option, unset that and it should fix your problem
|
|
|
flinder
30 posts
26 months
|
Mike, re the engine badge, Acton quote:
The First Lord Acton's words declaring the corrupting tendencies of power is a staple in literature of all kinds. The reorienting of his thought and reference to our hobby is a natural.
I did not originate this revision to Acton's quote. However I have seen plays on his words a couple of times over the years in car magazines, the best of automotive writing. Bamford Rose's use is most appropriate.
|
|
|
Stefanolux
87 posts
15 months
|
I can confirm that the "dimmer" switch WORKS. Thanks again to Stonic. MichaelV8V said: There is a 'screen saver' option, unset that and it should fix your problem
|
|
|
BamfordMike
440 posts
26 months
|
Tony V12V said: Hi Mike obviously the above would also apply to the V12V. Are you currently offering low loss cats or have I read somewhere that it is still 'work in progress' for a V12V.
Thanks
Tony Hi Tony. The low loss cats will be offered together or individually from the exhaust manifolds. The system is work in progress and when they are ready for delivery we will blog the details... This upgrade really needs to be applied to a standard silencer though, as the exhaust note from upgrade manifolds and catalysts really needs a bypass circuit in the silencer for those times when a too loud note is not wanted.
|
|
|
BamfordMike
440 posts
26 months
|
jakesmith said: Does the sportshift transition get through clutches less frequently, ie does its mechanical actuation prevent the slippage and other misuses that can cause low milage failure? And in replacement can it be exchanged for Bamford's £3k up rated clutch? Thanks. Hi... I would say given the wrong or worst case situation of operation, sportshift can prematurely wear the clutch more than manual leading to the often reported early life failure many PH members in the main forum comment on. Premature clutch failure from the OE single plate clutch is brought about by excessive slip during pull-away. We have seen a small number of clutch failures due to spring breakage or breakdown / chunks of the friction material separating from the plate, but in the most part, slippage / overheating of the friction material is the most common mode of failure. The worst situation is pull-away on an incline. I know of a number of customers who live in a hilly area (and from my own experience / use of the sportshift in this environment), that when moving forwards or worst case when reversing up inclines and especially when in traffic (stop / start) the all too familiar clutch BBQ smell wafts into the cabin and you know precious mm's have been removed from the friction plate reducing life. Pull away on incline requires precise clutch control and perhaps this is the situation which most tests the clutch control software of the sportshift. To prevent stall clutch control often excessively slips the clutch, too many operations like this cause premature failure - in these situations the driver can better control the clutch than an electronic brain and is why sportshift potentially could have greater rate of premature failure over manual. So the answer to the question is that it really depends on conditions of use. Some manual cars we see need clutch replacement at 5k....! where others go out to 40k when driven with care or are not subjected to the modes of operation to bring about failure. The new Vantage 'S' has hill-hold functionality which should go a long way to improve clutch life. Mikey K if you are reading - can you offer your comments on the whole clutch control / driveability / incline operation, control and your BBQ clutch smell experience Sportshift I / II and 7 speed. Yes, the uprated clutch can be fitted to manual and sportshift.
|
|
|
mikey k
6,453 posts
85 months
|
As Mike says the pre ASM2(7 speed box) gear ratios are such that inclines and reversing are a strain on the clutch. More so with ASM1 in "creep" mode. However regular clutch learns do improve it. I'd actually suggest a properly used & learnt ASM1 box is less likely to wear than a manual that is being slipped at the bite point by an "organic" trying to feather the clutch  ASM2 is a whole different ball park - creep mode is gone so no automated slipping of the clutch, reverse gear ratio is now nearer first rather than second so it doesn't suffer as much in reverse. It does a clutch learn every time you start it. You don't need to lift slightly as you change up to make it smooth. With the sport button in the changes are very sharp and "determined" with out a jolt. Hill hold works well saving a fight with the "unfamiliar" AM handbrake.
|
|
|
BamfordMike
440 posts
26 months
|
mikey k said: As Mike says the pre ASM2(7 speed box) gear ratios are such that inclines and reversing are a strain on the clutch. More so with ASM1 in "creep" mode. However regular clutch learns do improve it. I'd actually suggest a properly used & learnt ASM1 box is less likely to wear than a manual that is being slipped at the bite point by an "organic" trying to feather the clutch ASM2 is a whole different ball park - creep mode is gone so no automated slipping of the clutch, reverse gear ratio is now nearer first rather than second so it doesn't suffer as much in reverse. It does a clutch learn every time you start it. You don't need to lift slightly as you change up to make it smooth. With the sport button in the changes are very sharp and "determined" with out a jolt. Hill hold works well saving a fight with the "unfamiliar" AM handbrake. Great info, as you say creep mode gone meaning no automated slipping is a crucial improvement not just for clutch wear but driveability and general enjoyment too, IMHO.... With the single plate OE clutch in manual, it is possible to misjudge a pull-away for the conditions (whatever they be such as on incline wanting to do a spirited acceleration), induce slippage and get the BBQ clutch smell of doom - it happens to the best of us.... But yet no matter what the slippage / abuse the twinplate will never 'fry' no matter how hard you try to make it (in development testing of course ). My question is that with hill hold and better 'computer' control of clutch on Vantage 'S', have you ever experienced conditions that arise poor clutch control??
|
|
|
millsjq
131 posts
30 months
|
Mike, Do have a clutch for the 4.7 as well as the 4.3?
|
|
|
mikey k
6,453 posts
85 months
|
Nope no BBQ smell or signs of slippage at all.
|
|
|
Speedraser
578 posts
52 months
|
Mike, The astonmartin.com website has (or used to have – I just looked and can’t find them on the updated website) a couple of videos on the development of the V8V (and many other topics). I loved watching them -- they showed a wide variety of information about the design and development of the car. There was great footage of all sorts of testing, including hot- and cold-weather testing, endurance testing, crash testing, etc. One of the things that really caught my interest was the high-speed endurance testing, where the car was run on a track at maximum speed (or close to it) for something like 35,000 miles. Did these test/development cars have the stronger steel conrods that were used on the first small number of production cars? Were they also tested with the later (sintered?) rods? If they only tested with the better early rods, would the later production spec rods be able to handle those same endurance tests? Basically, I’m wondering whether the 4.7L engine in my MY09 V8V is capable of being run that hard. BTW, I'm loving the sound with fuse 22 out 
|
|
|
GTDB7
673 posts
37 months
|
An interesting thought...
Can you implement bypass pipes around the cats? (let's for arguments sake forget the physical restraints here and think purely about the ability)
That is, for normal use and testing etc.. you close the bypass off and run as normal.
When you want to, you can open the bypass, thus diverting a lot of gas around the cats, free flowing, better noise, however enough gas will also pass through the cats and not require the engine ECU remapping etc.
So no warning lights.
Best of both worlds or pie in the sky?
|
|
|
ockhamsrazor
57 posts
36 months
|
|
|
BamfordMike
440 posts
26 months
|
millsjq said: Mike, Do have a clutch for the 4.7 as well as the 4.3? Hi. Yes we do.... Subject to a few final development tests we are about to finish a project to make available for shipment worldwide, and suitable for fitment at any competent workshop, our up-rated clutch, lightweight flywheel and lightweight damper package that will fit both 4.3L and 4.7L Vantage. This package makes for a really clever upgrade as a worn out clutch can be replaced for an improved part at the same time as fitting lightweight components that make the engine feel sharper / return much better throttle response. The lightweight components reduce rotational inertia mass by about 7Kg (4.5 flywheel / 2.5 damper) which frees the engine up to rev much faster - PistonHead member OliHall is just about to comment on this as he has had this upgrade recently - http://pistonheads.com/gassing/topic.asp?h=0&t...When the kit is ready in box for shipment I will be sure to blog.
|
|
|
V8 Animal
3,716 posts
79 months
|
I guess the up rated clutch is dearer than the original one?
|
|
