Turbo/Supercharger?
- Thread starter Tortl1
- Start date
Jonny Crisp
New member
Arma speed make one. Have no idea if it's good or bad. They are based in Taiwan.
Yep, valvetronics and superchargers don't seem to mix so well.
No idea if there is a technical reason, or if just for after market companies it's more headache and cost than it's worth!?
And, it'd be cheaper to sell up and buy an Alpina or M Z4 at that level, in my view.
Dave
No idea if there is a technical reason, or if just for after market companies it's more headache and cost than it's worth!?
And, it'd be cheaper to sell up and buy an Alpina or M Z4 at that level, in my view.
Dave
I'm wondering why the after market haven't done anything with it though.
I'd guess it's as much to do with the valvetrain throttling as much as the weaker(?) bottom end?
In any case, the £/bhp ratio is a bit pants at that level, and considering the benefits in the overall package you'd get with the Alpina or M cars, it's a no-brainer to go for one of them, especially the M car!
Dave
I'd guess it's as much to do with the valvetrain throttling as much as the weaker(?) bottom end?
In any case, the £/bhp ratio is a bit pants at that level, and considering the benefits in the overall package you'd get with the Alpina or M cars, it's a no-brainer to go for one of them, especially the M car!
Dave
But the N55 has valvetronic and a single scroll. I heard somewhere it was a packaging issue for the N54, and that the N55 has a smaller and/or rearranged valvetronic package. Couldn't quickly find a reference though, so maybe I made it up.Mr Whippy said:
While the N52 block doesn't meet BMW's design goals for world wide production of forced induction engines, I'll wager a lot of N52 owners would say that a package with a modest boost would meet their driving goals.
Yeah, I can imagine you could get a 350bhp supercharger to work fine on a 3.0Si... so I imagine the struggle is that for after market tuners it's about moving from an NA valvetronic to an FI valvetronic...
Perhaps it's to do with the boost blowing valves open and essentially throttling itself up... a normal throttle body doesn't do that as it's balanced (rotates about centre of plate), a valve would just be pushed open under pressure.
Newer valvetronics with FI maybe use a different mechanism for valve pushing (and also holding/retaining)
Dave
Perhaps it's to do with the boost blowing valves open and essentially throttling itself up... a normal throttle body doesn't do that as it's balanced (rotates about centre of plate), a valve would just be pushed open under pressure.
Newer valvetronics with FI maybe use a different mechanism for valve pushing (and also holding/retaining)
Dave
This thread is probably done, but I'd like to respond to Dave's last post.
The valve push concept sounds plausible, but I think the valve springs are stout enough and the boost pressure low enough that that would not be a problem. There's a good explanation on how valvetronic actually enhances FI from one of M Power's engineers. Scroll down to below the blue/red cooling diagram:
http://www.bimmerfile.com/2011/09/25/qa-with-head-of-m-engine-development/
My foggy memory cleared slightly, now my recollection is valvetronic was left off the N54 due to packaging conflicts with direct injection, not forced induction.
The valve push concept sounds plausible, but I think the valve springs are stout enough and the boost pressure low enough that that would not be a problem. There's a good explanation on how valvetronic actually enhances FI from one of M Power's engineers. Scroll down to below the blue/red cooling diagram:
http://www.bimmerfile.com/2011/09/25/qa-with-head-of-m-engine-development/
My foggy memory cleared slightly, now my recollection is valvetronic was left off the N54 due to packaging conflicts with direct injection, not forced induction.
bcworkz said:
Yeah I guess valve springs could be sufficient enough to close the valves... hmmm...
But what is it that is stopping non-OEM tuners from using FI on it then?
That is what I am trying to work out... why have ESS not create a supercharger kit? There are clearly some hurdles that make it not a nice engine to use forced induction on.
Hmmmm
Dave