V8 Vantage 4.3 Alternative Performance upgrade thread
Discussion
whoami said:
Pretty unlikely that that will happen on any modified car.
Well I hope you're right, because if you are, I will be holding out for a BR car at the same price price as a standard one when the time comes. I'm not suggesting that the mods will retain all of their price, but I would certainly be prepared to pay a certain amount more for a car that already had them. scotpak said:
unfortunately we were not able to do a dyno post each mod
Why not? 
They're just bolt on parts and BR did this on an independant rolling road. It had been discussed previously.scotpak said:
maybe
maybe
maybe
maybe
maybe
Maybe
Well... That's a lot of 'maybes' on a purely factual thread isn't it? maybe
maybe
maybe
maybe
Maybe
Congrats Scotpak, sincerely; I remember the first time I put my foot down post-mods... It's staggering isn't it, hard to believe it's the same car! As others have mentioned, in time you may opt for a valved backbox though (mine was 112dB at Goodwood, 4500prm with a QS box, cats and standard manifolds) and I tired of it, as did the world at large.
It's incredible the difference in feeling you get accelerating flat out with the valves closed compared to the valves open. The sensation of speed is almost intimidating because it feels so surprising without the noise that you expect! I hope you get to give that a try one day!
When I (DMS actually) installed my backbox (and cats), there were claims from QS that it gave 40bhp and I could well believe it, my senses were overwhelmed. To later find out it gave 3bhp (and cats probably 15ish) was a real shocker
Man's brain: noise = power
yeti said:
Well... That's a lot of 'maybes' on a purely factual thread isn't it?
Congrats Scotpak, sinierely; I remember the first time I put my foot down post-mods... It's staggering isn't it, hard to believe it's the same car! As others have mentioned, in time you may opt for a valved backbox though (mine was 112dB at Goodwood, 4500prm with a QS box, cats and standard manifolds) and I tired of it, as did the world at large.
It's incredible the difference in feeling you get accelerating flat out with the valves closed compared to the valves open. The sensation of speed is almost intimidating because it feels so surprising without the noise that you expect! I hope you get to give that a try one day!
When I (DMS actually) installed my backbox (and cats), there were claims from QS that it gave 40bhp and I could well believe it, my senses were overwhelmed. To later find out it gave 3bhp (and cats probably 15ish) was a real shocker
Man's brain: noise = power
Hi yeti. I use my car mostly for my short daily commute thru the countryside and for that purpose the noise is spot on. I can see the point you are making about the noise vs power, however I can assure you that the power difference was significant and as stated earlier, you can go anywhere in 4th gear now with no need to downshift to get that torque.Congrats Scotpak, sinierely; I remember the first time I put my foot down post-mods... It's staggering isn't it, hard to believe it's the same car! As others have mentioned, in time you may opt for a valved backbox though (mine was 112dB at Goodwood, 4500prm with a QS box, cats and standard manifolds) and I tired of it, as did the world at large.
It's incredible the difference in feeling you get accelerating flat out with the valves closed compared to the valves open. The sensation of speed is almost intimidating because it feels so surprising without the noise that you expect! I hope you get to give that a try one day!
When I (DMS actually) installed my backbox (and cats), there were claims from QS that it gave 40bhp and I could well believe it, my senses were overwhelmed. To later find out it gave 3bhp (and cats probably 15ish) was a real shocker
Man's brain: noise = power
As for the, MAYBEs, just wanted to emphasise that those were pure estimates not based on the dyno.
scotpak said:
Looking at those dyno results again, there is something else which jumps out at me: there is virtually no increase in either torques or power until after 4k rpm. IMHO, that is where the stock 4.3l engine is most deficient (ie <4k rpm).
See how this compares to a certain competitor's comparable system:
The improved torque starts at 2k rpm. By 4k, there is a 50nm increase. I imagine that this would translate to a considerable 'real world' difference in performance and also, arguably, far more usable.
slippery said:
Like some of the others who have already posted similar comments, I was expecting there to be a larger differential in price between the two products.
That's what I've been thinking as well.I've wondered about that I could do to mine, but decided I do not want to spend £6k on the BR stuff. And I still don't want to spend £5k. Okay, £1000 is better than a poke in the eye with Jockman's dick, but £6k or £5k, there's not much in it to make any odds to me.
snuffy said:
...but decided I do not want to spend £6k on the BR stuff.
How about the BR 'cost down' option?http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Bravo73 said:
snuffy said:
...but decided I do not want to spend £6k on the BR stuff.
How about the BR 'cost down' option?http://www.pistonheads.com/gassing/topic.asp?h=0&a...
The thing is, with a normally aspirated engine, it's pretty much what it is. With a Turbo car (of which I've owned 4), it's a whole different kettle of fish, the world is your lobster when it comes to upping the power (until the engine blows up in fact).
Jockman said:
snuffy said:
...Okay, £1000 is better than a poke in the eye with Jockman's dick, but £6k or £5k, there's not much in it to make any odds to me.
And it's DIK.....we don't use the letter 'c' on the forum anymore.
Lol
unt
snuffy said:
That's what I've been thinking as well.
I've wondered about that I could do to mine, but decided I do not want to spend £6k on the BR stuff. And I still don't want to spend £5k. Okay, £1000 is better than a poke in the eye with Jockman's dick, but £6k or £5k, there's not much in it to make any odds to me.
I am the same. For me, i would rather invest the 6k at some point in the trade up to a 4.7 as the price differential closes.I've wondered about that I could do to mine, but decided I do not want to spend £6k on the BR stuff. And I still don't want to spend £5k. Okay, £1000 is better than a poke in the eye with Jockman's dick, but £6k or £5k, there's not much in it to make any odds to me.
With reference to the dyno, there is a decent increase in torque between 1, 500 to 2000 Rpm. Perhaps the size of graph or scale does not make that evident. Also the torque is 100% noticeable even at lower revs in my 2 days of driving the car. Maybe I will come to one of the future meets so you guys can see for yourselves.
As for the competitors dyno chart. It looks very suspicious and unrealistic compared to my car's chart. But of course no one will dare question that??
As for the competitors dyno chart. It looks very suspicious and unrealistic compared to my car's chart. But of course no one will dare question that??
scotpak said:
With reference to the dyno, there is a decent increase in torque between 1, 500 to 2000 Rpm. Perhaps the size of graph or scale does not make that evident.
But then the torque lines touch again (twice) before 4k, so any initial gains are effectively lost. £5k is a lot to pay for, er, not a lot.scotpak said:
As for the competitors dyno chart. It looks very suspicious and unrealistic compared to my car's chart. But of course no one will dare question that??
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