Remapping V8V opinions
Discussion
Hi there,
I've already got GT4 air intakes, sports manifolds, 200 cell cats and a sports back box. What value has anyone seen in also remapping the car to make the most of similar mods? I'd remapped my old Audi S3 which made a massive difference, but of course that was turbo charged so easier to tune via ECU. I'm guessing that only fuelling and timing can really be changed on the V8V? What type of gains theoretically might be possible? I'm looking at the company who did the original work on the car as I have been impressed with the results of their work so far.
Any comments welcome
A
I've already got GT4 air intakes, sports manifolds, 200 cell cats and a sports back box. What value has anyone seen in also remapping the car to make the most of similar mods? I'd remapped my old Audi S3 which made a massive difference, but of course that was turbo charged so easier to tune via ECU. I'm guessing that only fuelling and timing can really be changed on the V8V? What type of gains theoretically might be possible? I'm looking at the company who did the original work on the car as I have been impressed with the results of their work so far.
Any comments welcome
A
I am of the opinion that, while the actual increase of power and performance won't be that great, it may still be worth it for another reason. The V8V has a fairly soft throttle pedal mapping particularly at low revs - to prevent banging and thumping it smoothes out all the throttle movements. Removing that throttle smoothing would change the nature of the car so if you're looking for more feeling of speed and for a sharper response then this will do it. Perhaps at the expense of drivetrain life, if abused. It may be a different mapping that controls this, however, not the fuel and timing maps.
bogie said:
on 95 RON probably not much, if you are happy to get it mapped for 98RON or better then maybe theres a few bhp to be had
read the bamford rose thread sticky at the top of the page for more insight
V8V has a knock sensor, so it automatically adjusts for the corresponding ronread the bamford rose thread sticky at the top of the page for more insight
BravoV8V said:
Are you sure that it hasn't been remapped already?
It seems strange to put all of that extra kit on a car but then keep the original map.
Yeah I'm sure it hasn't been done already. I always run on 98RON but agree that from what I've read the knock sensors change the fuelling based on what fuel you use.It seems strange to put all of that extra kit on a car but then keep the original map.
The point about the throttle responsiveness is a good one. I'll have a chat with them tomorrow and ask a few questions.
A
If you've got GT4 air boxes, I'm assuming that means you have the "Power Pack" (at least, that's what they call it in the US). Those are the same air boxes that are on the N400, N430, GT (US N430), and V8VS. The kit includes a new, black intake manifold but the only difference between it and the standard is the addition of a port for a vacuum hose (it goes to the air boxes).
They do add a new map/tune when those are installed to account for the extra air when the air box flaps open up.
My car is getting dyno tuned right now. One of the main things I asked for is to make the throttle response more linear. As was mentioned, the throttle in the Vantage at lower RPMs is sluggish. Not only will you get better throttle response at the lower rev-range, the car will actually be more safe IMHO. The non-linear throttle makes the car very difficult to control in intentional snap oversteer on wet pavement. It's an odd circumstance, but hear me out... On a wet skidpad when you want to induce oversteer, you'll give it some gas and the non-linear throttle will do little, so you give it more and then the throttle opens up and the back end swings around violently because the power comes on so quickly. With linear throttle, the power would come on steadily and be much easier to control in those wet conditions. This is definitely relevant to real-world conditions. If you find yourself in adverse weather and you lose grip, it's easy to have the car get away from you because throttle input doesn't match throttle response.
Aside from that, you should pick up extra power from the additional tune.
They do add a new map/tune when those are installed to account for the extra air when the air box flaps open up.
My car is getting dyno tuned right now. One of the main things I asked for is to make the throttle response more linear. As was mentioned, the throttle in the Vantage at lower RPMs is sluggish. Not only will you get better throttle response at the lower rev-range, the car will actually be more safe IMHO. The non-linear throttle makes the car very difficult to control in intentional snap oversteer on wet pavement. It's an odd circumstance, but hear me out... On a wet skidpad when you want to induce oversteer, you'll give it some gas and the non-linear throttle will do little, so you give it more and then the throttle opens up and the back end swings around violently because the power comes on so quickly. With linear throttle, the power would come on steadily and be much easier to control in those wet conditions. This is definitely relevant to real-world conditions. If you find yourself in adverse weather and you lose grip, it's easy to have the car get away from you because throttle input doesn't match throttle response.
Aside from that, you should pick up extra power from the additional tune.
telum01 said:
If you've got GT4 air boxes, I'm assuming that means you have the "Power Pack" (at least, that's what they call it in the US). Those are the same air boxes that are on the N400, N430, GT (US N430), and V8VS. The kit includes a new, black intake manifold but the only difference between it and the standard is the addition of a port for a vacuum hose (it goes to the air boxes).
They do add a new map/tune when those are installed to account for the extra air when the air box flaps open up.
My car is getting dyno tuned right now. One of the main things I asked for is to make the throttle response more linear. As was mentioned, the throttle in the Vantage at lower RPMs is sluggish. Not only will you get better throttle response at the lower rev-range, the car will actually be more safe IMHO. The non-linear throttle makes the car very difficult to control in intentional snap oversteer on wet pavement. It's an odd circumstance, but hear me out... On a wet skidpad when you want to induce oversteer, you'll give it some gas and the non-linear throttle will do little, so you give it more and then the throttle opens up and the back end swings around violently because the power comes on so quickly. With linear throttle, the power would come on steadily and be much easier to control in those wet conditions. This is definitely relevant to real-world conditions. If you find yourself in adverse weather and you lose grip, it's easy to have the car get away from you because throttle input doesn't match throttle response.
Aside from that, you should pick up extra power from the additional tune.
Thanks for your detailed response. Having spoken to the tuner again I'm going to have this done in a couple of weeks. The point regarding throttle response is a good one. I'll report back again after the work has been done. They do add a new map/tune when those are installed to account for the extra air when the air box flaps open up.
My car is getting dyno tuned right now. One of the main things I asked for is to make the throttle response more linear. As was mentioned, the throttle in the Vantage at lower RPMs is sluggish. Not only will you get better throttle response at the lower rev-range, the car will actually be more safe IMHO. The non-linear throttle makes the car very difficult to control in intentional snap oversteer on wet pavement. It's an odd circumstance, but hear me out... On a wet skidpad when you want to induce oversteer, you'll give it some gas and the non-linear throttle will do little, so you give it more and then the throttle opens up and the back end swings around violently because the power comes on so quickly. With linear throttle, the power would come on steadily and be much easier to control in those wet conditions. This is definitely relevant to real-world conditions. If you find yourself in adverse weather and you lose grip, it's easy to have the car get away from you because throttle input doesn't match throttle response.
Aside from that, you should pick up extra power from the additional tune.
A
As Telum points out a map will not make much difference to the head line numbers as its not force inducted like your S3 was.
If you think there are "holes" in the torque curve its worth persuing but there ain't too many out there that have the FULL access to custom code the ECU.
Most tuners offer a generic map that simply relies on high octane levels to get higher head lie number.
The Aston engine suffers the same "obstacles" as the NA Jag 4.2 from which is is derived.
If you think there are "holes" in the torque curve its worth persuing but there ain't too many out there that have the FULL access to custom code the ECU.
Most tuners offer a generic map that simply relies on high octane levels to get higher head lie number.
The Aston engine suffers the same "obstacles" as the NA Jag 4.2 from which is is derived.
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