7 port turbo
Turbo Mini Forums

who's gonna be the first to try it?
if i had loads of cash i would for sure.
DAN :)

i looked at this last year i had my credit card out ready to buy the head

then i looed into the head a bit and found they had very shallow chambers and no meat behind them, also the ports are far far to large

I'm planning on doing it when I get round to fitting some engine management.

Not going to be in the near future I don't think.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

I'm planning an 8 Port Turbo for my current project

might take a while, cash flow and all

price wise, what would u be looking at?

peace,
dont work to hard!

8 port heads are about ?1500 with valves etc

Special cam for 8 port head

You then need custom manifolds making

The other issue which I've not decided on is fueling and ignition
Carbs, maybe some nice short motorbike ones.
Or fuel injection and probably a fully mapable ignition system.
Minispeed?s one looks ok and I think they are developing a kit for use on a Jack Knight 16V head which would probably be ideal for a 8 port 8 valve turbo.

Plus a bullet proof bottom end and gearbox or things will be breaking pretty soon.

If all this were put together with the right turbo and set up well I think it could rival MiniWillams.

This is my dream plan for the engine for my project if it ever happens is another question

All in it?s quite a bit of cash

I don't think it'd be a problem to rival matt with an 8 port, fuel injection and shed loads of cash to make the project work...

I just need to find and endless bucket of cash to do it

If you have any left, lend me a few quid!

don't forget me! :)

does anyoe know roughly what a 7 port would cost?
i am interested to see how the price compares with an 8 port

after import tax it was about ?1270 for a bare head

Yes if we all had some money :(

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

where can you get a 8 port head for under ?2k, does that come with cams and valves???

What choices are there Jack Knight, KAD, anyone else?

Team Racing

Minispares sell and Arden 8 Port 8 Valve (copy of original I think)
For about ?1250 plus valves etc and cam

is that overhead cam?

Team Racing

With the 7 port I assume its the exhaust which has 3 ports

I think the 8 port would be better as you'd be able to get 4 equal length headers off, if the space can be found
(The Janspeed Idea of mounting the Turbo on the side might be an idea for that)
so you could get 4 equaly timed pulses to the turbo which apparently helps it spin up or so I've read.

Not much difference in price either by the looks of it.
unless anybodys won the lottery and wants to try a KAD of JK 16V

this is going to be my plan for next year

Team Racing

Jimster the Arden 8 Port type heads use the original cam location

They look very much like a normal head
Theres some pics on this site
http://www.geocities.com/jharkola/8port.html
I think the guys a member on here.

apparently they need a slightly different cam for some reason which I don't quite understand.
Keith Calver on Minispares site has some info on it, also something about in Vizards book i think

The Inlet port being at the front also gives the advantage of giving you shorter Intercooler routing

Jimster which one?

7 or 8 port?
8V or 16V?

I read somewhere that the arden head flowed crap, is this the case?

Team Racing

I think the advantage of an extra exhaust port is minimal. The shared port on cylinders 2 and 3 fire 360 degrees apart so do not interfere with each other anyway. I can't see much of a performance gain there.

However (and I am talking about the crossflow 7 port head here) the different cam, rockers and exhaust manifold on the 8 port are a hugh expence not to mention experimental. The 7 port uses all standard stuff so would give you more or less the same power for much less money and far less hassel.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

yea, sounds like your right to me Ben

Edited by Jimster on 1st Jul, 2004.

Team Racing

Don't know

I think your more limited on how far you can take the ports and chambers as they're alloy and there's less metal in them

Due to space probably

thats why I posted about being interested in the 20CC forged pistons. so I wouldn't have to take the head out as far to drop the CR

I think the 7 port is Cast Iron. The 8 port is limited because it is alloy. Or is that what you meant?

http://www.akmracing.dk

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.