My up coming projest 05/06
Turbo Mini Forums

Hey everybody just to let you know about my new project im going to build a 7 port turbo its staying as a 1293 so ler me know what ya think i will have pics on the miniforum to if your not a member there. CJ

Should make a cracking engine, I take it you are going to make the most of the head and fuel inject it?

Well this has been the hot topic i dont know, but if i do inject it i may go for this companys one where i live in lincoln i know its really a race set up but you get so much with it. We shall see nearer the time.

http://www.mberaceengines.co.uk/ecu/mini_8port.htm

MBE - I think that's where we held the first (and only) TurboMinis Rolling Road Day!?

Cool well im going to get the tuning sorted there if possible. I was wondering about having the two hiff 44's on the 7port do i need to run both. Some one told me i didnt have to. Any thoughts

If you have the budget to spend on a new-build 7-port head'd turbo, then you've the money to spend on an EFI setup IMO.
Wtih scrapyard parts, all you need is a £600/700 ECU - or a lot less with Megasquirt...

Having four inlet ports available, and then sticking a pair of Carbs on there, is simply a waste of time and effort. The ONLY reason to go for a seven port turbo IMO is becuase you want EFI. If you just want carbs, you can do this on a 5-port.

Edited by turbodave16v on 18th Nov, 2005.

Ok thanks for your thoughts at the moment this is all in the early stages so things may change.

Yes agree with Dave. If you are going to the expense of a 7 port head it would be a waste not to make the most of it and inject it.

Right thats made things clear lol thanks.

It's like spending lots on a nice snap-on tool box, and filling it up with bendy-spanners from a car-boot sale. A bit pointless.

who does 7 port heads at the mo?

minisport are doing the AKM i believe.

Arden do 5 to 8 port heads i believe not sure what else they do havent checked in ages.

so these heads will need a pretty big custom plenum! I presume some sort of over-the-clutch mounted turbo?

hey - unless I'm mistaken, it looks like minisport have done what AKM should have done ages ago - reduced the size of the inlet ports... (?Maybe?)

The plenum doesn't have to be that large - it'll easilly fit in the front of a roundnose with the internal bonnet release and slam-panel if designed to so do...

Still has three exhaust ports, so stock turbo manifold and layout remains.

plenum should be 70% of engine capacity iirc something one of my neighbours said, he runs a local motorsport prep buisness

Edited by wolfie on 19th Nov, 2005.

i thought it was 1.3 times the size?

looking at that head gives me a semi

Well i'll go and see what the race guys say when i get round to having it all fitted. I going to need a plate or something to mount the injectors anyway so i'll find all the right info. And i will update the tread as i go along. Thanks

I've never done ay back-to-back tests on EFI plenums, so can only go off what i've read, which is usually larger than the displacement. That said, the Grp B Rally cars and older F1 turbo engines didn't look like they always followed this rule...

Edited by turbodave16v on 19th Nov, 2005.

Well i never new about the plenums having to be a certain size! thanks again.

"Hi,

Ive already had a request from a guy who wants to build excactly the same engine,
I think it would work fine, But we are already getting 210bhp from the 5 port using the S.U carb so i would not expect a massive increase.

Simon"

Got this today from Morspeed. Seems somebody has been reading my other Posts LOL

I wonder who that engine belongs to?

wondered what you were up to jon, only prob i can see is the clutch coping with that power, then again this will prob be something special too no? even if you only get 200 bhp it should be more reliable shouldnt it?

So, if this 'person' is Giallofly, then that's FOUR different folks looking into the 7-port head...

I'll have a fiver i can still make a five-port run quicker/same times...

I've heard a few rumours about some people building 7 port engines...

Not me, i'm not that rich

I reckon that the times will be similar but guessing all round driveability/fuel consumption etc will be vastly improved? Maybe track times rather than quarter times would be improved.