Astor XS XU7J4RS (For Sale £1000)

[Grant]

The longer the distance to the TB the lower the powerband is that the manifold has been designed for. Formula one engines that spend most of their time high up the rev range have next to no runners, whereas you look at v8/v12 engines. You could hide a heard of cows in some of them

I see what you are saying, but following that principle, fitting a resonator bung should have the same adverse affects on a gti6, as fitting a 6 manifold on a 1.8 supposedly has.
IF you follow this principle, you have changed the volume of the manifold air, but the pressure on the back of the valves when shut should remain the same. The vacuum pressure has remained the same (as far as we know) so the pulse waves through the inlet will be ny-on the same.


Also, if you follow the theory that the pulse tuning of the engine is upset by the manifold, fitting a '6 exhaust manifold should see you with the same negative effects as a claimed to be found with the '6 inlet. By that reckoning you would be creating less depression on the back of the exhaust ports when shut, which would leave you with less volumetric efficiency...
This is of-course if the pulse tuning has been upset by fitting the manifold... IMO no, but thats just me

But yes granted, an ecu remap would greatly benefit in this scenario.

I will stop cluttering up your project now, sorry mate. Feel free to ask admin to remove yet another '6 manifold bickering match


P.s Love your car!