Is a back box enough for nice sound?
- Thread starter Rory
- Start date
Power claims are at the crank, right? Not necessarily the (rear) wheels - rwhp as you'd call it - it all seems a bit false from time to time - power claims are surely just a marker, a bit like when Donald Trump said the money didn't matter, it was more just a method to keep score. The comb-over b*stard.
Especially when you start thinking about the air fans they use on a rolling road, some %age adjustment to make the owner feel good - sorry, to make it more realistic I meant - and the complex shafts, gearbox, more shafts, rubber etc...
Power is relative - just go for the sound you like. :wink:
Stevo
Especially when you start thinking about the air fans they use on a rolling road, some %age adjustment to make the owner feel good - sorry, to make it more realistic I meant - and the complex shafts, gearbox, more shafts, rubber etc...
Power is relative - just go for the sound you like. :wink:
Stevo
Im hoping retaining a back box will provide enough back pressure not to lose power, I know the one I had on the Supra was very free flowing ( was too free flowing tbh, it was for a turbo car and mine was NA) so that's probably why it lost a bit of low down grunt.
Its hard to find anything for sale other than Remus and Supersprint, and they are both around £580.
Its hard to find anything for sale other than Remus and Supersprint, and they are both around £580.
daveR6 said:
How much did it cost you at Powerflow if you don't mind me asking? Was thinking about using them myself.
Beetlegav said:mr wilks said:Beetlegav said:
It's going to make way for R32 all being well
SubaruGood cars but you gotta go E46 M3
Yeah I'd get an r32, tempted by some of the deals about for the R at the moment too.
I'd just love a flat 4 turbo though! E46 m3s are looking dated now and there's only 1 I want. It has to be a manual Laguna seca blue coupe!
Why don't you try a flat six with two turbos in a z4 ?
pokeybritches
Member
Backpressure is never a good thing...
Not true. Back pressure at low rpms is the main reason why your car is able to idle. The pulses of the exhaust gases as they leave each cylinder cuse hharmonics in the pressure of the exhaust manifold, and draw out the gas from the other cylinders. This is an essential part of n/a tuning, and is precisely why people spend small fortunes on beautiful balanced exhaust manifolds, rather than having a dirty bit of scaffold pipe welded onto the end of the exhaust ports...
With turbocharging or supercharging, the requirement for harmonics in the exhaust manifold back pressure is negated, so yes in these applications you need as little as possible.
With turbocharging or supercharging, the requirement for harmonics in the exhaust manifold back pressure is negated, so yes in these applications you need as little as possible.
mr wilks said:
Id just Ilike to add that my 4wd Sierra Cosworth was pumping out 225bhp from the factory in 1992,
that was replaced with a 1992 2.5lt Mark III Toyota Supra turbo with 280hp standard
Hardly "Super Car" either if you think the Ferrari F40 pushed out 471hp.
