FI Plenum Design, MS'ing my 2270 Options

[Tom Perso]

Hey Guys,

I am designing a MS system for my 2270 (163.86b cam, 48x38 valves, future Triad header). I am looking at running stock intake runners and possibly making a new plenum to run my Ford TB (probably from a 4.0L Exploder/Ranger).

Are there any "design guidelines" that should be followed when making a new plenum, such as a certian volume required for engine displacement?

Looking at space requirements, I see running the TB on top of the plenum is the only way to go. That, of course - begs the question... Is the stock 914 2.0L plenum a good starting point to modify to allow for the Ford TB?

Here are some pics for reference... I had a Bus 2.0L intake system to borrow, so I am basing my measurements and ideas off of that.

http://www.qtm.net/~persot/MS/

Any ideas, suggestions, etc, are appreciated!

Thanks,
Tom

[SirAndy]

QUOTE (Tom Perso @ Feb 1 2005, 05:41 AM)

I am designing a MS system for my 2270 (163.86b cam, 48x38 valves, future Triad header). I am looking at running stock intake runners and possibly making a new plenum to run my Ford TB (probably from a 4.0L Exploder/Ranger).

i'm building the exact thing as we speak for myself and randal ...


assuming you want to stick with the single plenum setup, you'll need:

- 38mm (inner) dia. intake runners
- head port at intake side matched to runners
- TB with a dia. between 48mm - 50mm, preferably a 50mm TB with a 48mm venturi
- a (common) plenum with a volume of 1.2L

i'm already talking to a machine shop to get this fabbed. runners bend, custom plenum etc.
i still need to find a good TB and modern injectors ...

let me know if you are interested, the more of those we need the cheaper they will be ...
(IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif) Andy