Anyone know what the differences in the Rs1600i inlet plenum over the XR3i MFi

I know what externally but were the internals opened up slighty?

they also have the 4 bolt throttle housing same as early XR3i's

I'm thinkig of uprating my MFi Xr3i racecar engine wise and want to keep the standard MFi set up if possible

or it will be Jenvey time

Cheers!

 

The casting was totally different. longer trumpets and as it seems a slightly smaller plenum.

 

just thinking it must have had some slight performance differences over the Xr3i inlet?

 

much bigger throttle body too, i bought one just to see about fitting it to an rs turbo once
still in my shed

 

also the tb sits at a different angle

 

That's just because the RS1600i was developed for LHD vehicles. Brake servo sits a lot lower so for the XR3i it must have been altered to run the induction hose behind the servo.


A friend of mine (with a master degree in automotive engineering and several years of engine development and motorsport experience) told me it's better for engine response (because of the 2.8i throttle body) and for low rev torque.

 

Cheers Guys

I might try and get hold of one then

 

bid me, can come with the tb too altho its in bits and i was looking to have it machined to take the rst bits

 

Don't know if you are aware but the throttle body off a v6 2.8 capri will fit the 3i plenum perfectly. The plenum will need opening up to match the throttle body though of course

 

No it won't. 3i has a triangular shape, RS1600i a rectangular. MK3 XR3i ones came with an adaptor to make a rectangular tb fit. MK4 XR3is had triangular tbs. And after all... the standard RS1600i tb is as big as the 2.8i one.

 

yeah i would need the Mk3 XR3i inlet as my mate fitted one to his racecar when we did a tintop race with a 2.8i

I know someone with a complete Rs 1600i inlet with throttle body

 

i'd rather you say how much your after

already been offered one thats complete with injector sadwich too