intake manifold

[Anonymous]

my cousin has an au II xr6 and the intake manifold has 2 intkakes a short one and a long one, the short one is for low end torque and the long one for top end power. my question is would there be much actual benifit in this? and would it be computer controlled or could i hook it up to a x-flo 250?

 

[DYNOED250]

the manifold is a dual lenght item. ford have used em since ef-ba, they have a group of butterflys that are compuer controlled via a vacume valve, around 3000 rpm, it shortens the runners for more up high power.

 

[Anonymous]

so would there be some way of fitting this to a cortina, with out the ef-ba computer?

 

[addo]

Sure. Get a shift light kit, dial it to light at your runner change point, and have the vacuum switched by solenoid then, using the shift light power not to a bulb, but to a relay switching the solenoid. You'll need a vacuum reservoir for smoothest operation.

 

[Anonymous]

As suggested above a shift kit would be a good way to do it. Jaycar sell a build it yourself kit for about $30.

The vacuum reservoir is a good idea also and the vacuum solenoid valve can be taken of any jap car at the wreckers quite often they have them inline with charcoal canisters, fuel regualtors etc.

I used one of those manifolds on a turbo crossflow engine. It did not bolt directly onto a crossflow though. I had to cut the flange off and weld another flange on to adapt it to the back of the XF falcon injector manifold.

The manifold was good for 30 ft/lb of torque upto 3700 rpm. 3700 rpm was the ideal spot to switch it. No matter what happened the torque always dipped slightly while the butterfies were switching. To fix this problem I changed the switch point upto to 3900 rpm.

Just to correct your first post, the short runner is used for the top end power and the long runner is for low down torque.

 

[Anonymous]

cool, i new that the manifold wouldn't bolt straight on. i was thinking of making a flange my self by tracing the xf flange nd welding it onto the ef - au manifold. would it work?