i have cut off the elbow as i am going to turn it around so i thought while im at it i might aswell improve the airflow into it.
i have worked out the area of the throttle is 2828mm and the origional rectangular inlet to the plenum is 120x25mm = an area of 3000mm

this means that the rectangular inlet is not a restriction but i have opened it up to 185x25mm area off 4650mm so plenty of flow.
but i have now evened up where the air enters and flows more evenly to the cylinders.
so it should have better distribution now.

my question is
now ive gone this far should i go a bit ffurther and put a supply pipe to cylinders 1&4? say a 25mm pipe from the new elbow to just under the trumpets of 1&4?
or is this overkill and not neccisarry?


what do you think?

 

so what you want help with?

 

at the end i wrote should i put 2 pipes in under inlet runners 1&4 to help distrubte the air more evenly or is it pointless? lol


here is a terrible 10s paintshop effort of what i mean lol


should i add the green pipes?

no it wasnt drawn by a 5yr old they would probably do better lol

 

If you do a search in the forsale room fiestacossie had a 500 cover modded like what your suggesting done by Julian Godfrey and it looked just as hideous as your picture

Hth

 

I got the name wrong but here's the pic -



And here's the link about what power it was good for

https://passionford.com/forum/ford-r...-4wd-bits.html

 

Good for 550hp.. Why would you modify it more?

Alt. you could just by a proper one:
http://www.autospecialists.co.uk/New...duct-1075.html

 

yea dan-saff, thats what i meant.
im not fussed if its not that pretty as its not really seen.

im not doing it fforr power, im only running 400ish bhp

im wondering if its better for evenly distributing the air to the cylinders.


and the reason for doing this is mainly cos im reversing the throttle body so it faces the rear of the engine not the front.
i will eventually buy a proper one but that will also need cutting and reversing.
i want to get this on and working before i cut up a nice new expensive one lol

 

I was only saying as your picture looked strangly close to what had been done to this cover.

Instead of doing that why don't you smallish slot holes under each port and put a tapered log type tube kinda like a Mountune inlet so it pressurises the log then bleeds into the cover? If you do the first design I can't see the added tubes working without adding a restriction to the elbow because of the airspeed I might (prob) be wrong tho.

 

So who's tried the AS plenum?

 

I have the real version lol

Works ok, lost a bit of bottom end over my ST Escos inlet

Steve

 

I'm going ST or rs500

 

I've RS500 on mine, total overkill for the spec, but sure

I've been told the extra piping welded in will only help when the car is off boost? It's not really necessary?

 

Pointless for me...

 

Well I've had most of mine done, went through a few variations before deciding what to go with.
Will put some pics up once I pick it up in a couple of weeks.

 

heres a pic of a modded st one i have [for sale],was on tibs 550bhp 3dr