Trumpets

[c9311]

Benefits of these?
They look like they will sound pretty sick, gives each cylinder its own throttle body so you get more specific mixes and stuff?
What performance gains would you be likely to see? Not looking at doing this ever just keep seeing them around the web and want to know why you would bother spending £1500 on them (for a 4pot 0.o).

Look sick.

 

[localloon]

Very tunable so able to release more of those ponies. My dad has quad delorto carbs on his racer with short trumpets and they just pour fuel in! .......mind you his is an 8 pot lol

 

[JJ]

Mate had them on a Clio 172 cup dyno'd before at 171bhp and after at 206.8bhp best thing sound fappin amazing!.

JJ

 

[Quicksilver]

There was an article in 'Fast Ford' Sept? edition about an ST200/220? being treated to a set of them with quite good results although the owner had to call on the expertise of Noble engineers to get the best out of them and modify his bonnet with a scooby scoop to allow for the extra height.

 

[jamie_duff]

If you look up one of my several lectures on what the IMRC is for on the V6 Cougar - i.e. all the pressure wave effects you get when the cylinders interfere with each others' intake charges in the inlet manifold, sometimes helping each other but usually not and sometimes even hindering each other, all depending on the RPM. Any given size of manifold and length of inlet tract is perfect for one single RPM, and increasingly wrong the further either side you deviate from that.

The individual throttle bodies completely remove that issue and so when setting up the engine you can treat each cylinder as a separate engine in it's own right - the intake charges are completely independent from the other cylinders. It just removes an extra layer of complication and allows the engine to be tuned for high power without wiping out all it's low to mid-range performance - something you can't do with a manifold.

All you then need to worry about is the length of the stacks (trumpets) - long ones for low to mid-range grunt and short ones for high end power.