Vanquish Fuse 15/22
Discussion
In order to try and defeat the multi- circuit Fuse 51 on the Big V, I asked my dealer to disconnect and block off the vacuum hoses to the valves - hence permanently open..on "lesser" (only meaning non-8 speed boxed) cars this might lead to some droning at cruising speeds. However with the ultra-high 7th and 8th speeds this is really not a problem, even at brisk speeds on the Continent.
In the mountains, the sound, with decats, is truly epic 😎😎
Maybe worth a try - virtually cost free!
Cheers
Andy
In the mountains, the sound, with decats, is truly epic 😎😎
Maybe worth a try - virtually cost free!
Cheers
Andy
moveover said:
Thanks all, but the Sport button does not keep the valves open all the time; they are still programmed to open at about 2,000 revs.
Not sure where that comes from? What year Vanquish you talking about? If you mean gen 2 then my Vanquish then Vanquish S leave the valves open all the time at all revs when set to sport. Maybe you mean gen1? As per video
https://www.youtube.com/watch?v=o-3g6l05daQ
M5MarkM said:
moveover said:
Thanks all, but the Sport button does not keep the valves open all the time; they are still programmed to open at about 2,000 revs.
Not sure where that comes from? What year Vanquish you talking about? If you mean gen 2 then my Vanquish then Vanquish S leave the valves open all the time at all revs when set to sport. Maybe you mean gen1? Are you sure this is correct? Even in sport mode my valves do not open between circa 1000 - 3000 rpm.
Nick
I have a 13 year Vanquish and there is a small flat spot under 2700, even if you have the Sport button enabled (never off in mine).
What I did to compensate this was get the straight pipes from the Vanquish S fitted to it in place of the secondary cat, which makes the initial sound a lot louder, and then also anything north of 2700 sounds terrific, night and day difference.
Whilst it won't help fix the flat spot issue, it no longer bothers me like it did before. It's something I'd highly recommend.
What I did to compensate this was get the straight pipes from the Vanquish S fitted to it in place of the secondary cat, which makes the initial sound a lot louder, and then also anything north of 2700 sounds terrific, night and day difference.
Whilst it won't help fix the flat spot issue, it no longer bothers me like it did before. It's something I'd highly recommend.
ajk9 said:
I have a 13 year Vanquish and there is a small flat spot under 2700, even if you have the Sport button enabled (never off in mine).
What I did to compensate this was get the straight pipes from the Vanquish S fitted to it in place of the secondary cat, which makes the initial sound a lot louder, and then also anything north of 2700 sounds terrific, night and day difference.
Whilst it won't help fix the flat spot issue, it no longer bothers me like it did before. It's something I'd highly recommend.
Thank you.What I did to compensate this was get the straight pipes from the Vanquish S fitted to it in place of the secondary cat, which makes the initial sound a lot louder, and then also anything north of 2700 sounds terrific, night and day difference.
Whilst it won't help fix the flat spot issue, it no longer bothers me like it did before. It's something I'd highly recommend.
Mine is an S and you are exactly right, the flat spot is just around 2700 rpm
ajk9 said:
A full decat would do the trick 
My old 4.7 V8 Vantage had a similar flat spot and pulling fuse 22 eliminated that. The valve control still works on mine with the secondary cats replaced, so whatever is controlling the valve is either in the primary cat or further towards the engine.
The 8 speed vanquish has a torque restriction programmed in for gears 2 & 3 across the entire rev range, is it possible the flat spot being noticed is reaching said torque limit at 2700 rpm which is then held throughout the acceleration in those gears? Does the same flatspot occur in gears 3+?My old 4.7 V8 Vantage had a similar flat spot and pulling fuse 22 eliminated that. The valve control still works on mine with the secondary cats replaced, so whatever is controlling the valve is either in the primary cat or further towards the engine.
Either way, bespoke control of the exhaust valve in any mode, removal of torque restriction in gears 2 & 3 (set @ 500Nm gear 2 and 550Nm gear 3) and pedal progression remap will no doubt return the desired exhaust note at any speed / mode and cure the flatspot.
And yeah, a primary decat and porting across of AMR V12 mapping or bespoke mapping to suit new hardware will be the sweet spot for 8spd Vanquish
This is what we need, I think combining Sports Cats and Activalve I can get loud when I want to: https://www.larinisystems.com/collection/aston-mar...
PantsFire said:
This is what we need, I think combining Sports Cats and Activalve I can get loud when I want to: https://www.larinisystems.com/collection/aston-mar...
If keeping primary cats, high flow secondary cats (sports cats) are pointless, might as well fit secondary decat pipes (std spec on GT12 and AMR)If removing primary cats, only then are highflow secondary cats worthwhile / needed.
For either of those mods a remote device like you refer to is ok, but it only delivers a fully loud mode or normal switching mode. It’s a lot neater solution to reprogram the ECU to deliver the exhaust valve strategy tailored to individual taste using the Sport button.
But certainly, if all that was wanted was a quick / dirty override to make exhaust note loud, the remote switch is effective and cheap, clearly doesn’t solve the niggle of being robbed 150ish NM in gears 2+3 though
Gassing Station | Aston Martin | Top of Page | What's New | My Stuff