Who's actually got this running on a 5 port???
Turbo Mini Forums

I'm thinking of going EFI on my autograss mini, but who actually has this running without the need for constant tweaks on the laptop? No turbo on my car, but does need to give fueling better than my current weber 45 safely to 9800rpm. I'm happy to got wet manifold, it's got to bet better than a carb.

So how well is yours running and what ECU are you using, is yours sequential, batched and is it wet manifold type.

This has to be a bullet proof system, I don't want to risk damage to my engine which is worth more than my 16v twincam turbo lump.

Cheers

Jimbo

Team www.sheepspeed.com Racing

I dont run one of these but it is to my understanding that it wont need constant tweeking? Matt & Will only tweek theres due to them mapping it themselves?

i cant really answer how well they run as i dont have one :p or if you should be running 5 widebands :)

I agree, once it's set up, no tweeking needed.

If it's only for racing then the map is easy. It's the buggering around to get cruise and light throttle fuelling good that is the pita; and why I keep tweaking.

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

www.twin-turbo.co.uk

Doesnt JohnK offer a specific 5 port system ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Dazed and Confused....

Many people running this kit?

Team www.sheepspeed.com Racing

I've got it, hope to have it running in the next month. Looks to be a well made bit of kit.

The ms2 has been running well on the 998 NA using the sequential Siamese code.
There has only one major problem in the 2 1/2 years that it’s been on the road and that was an injector driver dying - more likely than not due to bad build by myself.

As wil says, for the most part - for me certainly- all the tweeking has been getting cruise and light throttle fuelling correct.

Ok, not massive power - but still nice to drive and definitely more torquey than it was as a Carb'd engine. Also more fuel efficient as long as I don’t rag the ass off it.

’77 Clubman build thread
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=618189

Siamese 5 port EFI testing
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=611675

Running the 998 Ti on MS2 and port injection for 5 years now. Only issue being crap ebay fuel pressure regulator. Fitted the turbo in 2009 when we finally got the fueling methodology sorted.

MS3 and port injection running on the Miglia Turbo since last summer. Runs like a dream but needs motivation and fine tuning.

A total of 4 port injected projects on the go but having a break at the moment.

I don't want to fuel the wet manifold vs port injection arguement, but if you want to ensure that you do not damage that engine then you have got to do something special to get the right amount of fuel in the outer cylinders at nearly 10,000rpm . The combined effects of wall wetting and air-charge robbing will mean that the outer cylinders probably need 20-30% more injected fuel than the inner cylinders.

Edited by Paul S on 18th Aug, 2012.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I think this is a very important point. wet manifold is a compromised solution, and probably best suited to more conservative specifications.

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

www.twin-turbo.co.uk

I would have to agree with Paul and Wil.

Up until a few days ago (when my one and only LC-1 failed, see JB's forum) I was doing a few tests to try and correlate inners vs outer compared to after the turbo.

The amount I could alter inner vs outer (by moving injection timing) but still keeping a stable reading after the turbo (until the LC-1 went pear shaped) was quite impressive.

So, as Paul says without wanting to "fuel" (nice pun) the port vs wet manifold debate, if it's an expensive engine, put widebands on both inners and outers whatever ECU you choose.

If it's N/A it's dead easy.

Schrödinger's cat - so which one am I ???

Paul,

Would you still use the single pulse mode on a high revving N/A engine which likely has quite a bit of cam overlap? I ask because that would remove the MS3 option and require the use of an MS2-based ECU (which is not a problem).

Jean

http://www.jbperf.com/

Certainly would. Idle could be an issue, but WOT would be fine.

We are running it with a 280/290 degree cam on the Miglia without issue. But then we are using smallish primary injectors.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I can see how that would work on a turbo engine due to backpressure but don't you think that on an N/A engine there could be a significant amount of fuel thrown out in the exhaust especially with a well tuned exhaust?

http://www.jbperf.com/

Backpressure? No backpressure on my engines :)

There will be less carry through of fuel on the inners and more than usual on the outers. Not sure that it would be an issue on a race engine.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Yes Jim As T@Z rightly said, I do tweak it, but that's maybe because I'm no expert and have to do it slowley, If ou got it set up by a pro, i have no reason to see why it couldn't be left alone.

Well I've now had my can running for over 6 months, it's no better then a carb but was some thing i just wanted to try. And as I've now proven this can be done on a powerful A series under some real boost, I'm very sceptical that all this port robbing is as bad as made out to be. IMO I should add!

Edited by Miniwilliams on 1st Sep, 2012.

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

Why not replace the weber with a jenvy throttle body? or such like?

Or is my thinking off key here

Matt W

You mean like this?
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=486295

Dazed and Confused....

i think if JohnK was about a bit more it might inspire more people to have more faith about this item.....where did he go or did that "debate" a while ago put him off?

however i do like that jenvy TB idea :)

Are somebody using another ECU that MS? I have both a Lumenition and DTA in my garage doing nothing, and it would be great to use on of those instead of the hif44

www.shag.no

Without wishing to "fuel" the debate any more about "port robbing" I'll just repeat what I've said many times before....


How many of you have widebands on both the inner and outer cylinders, and have actually looked at the difference ???


It's dead easy to do on a N/A or supercharged, quite a bit harder on a turbo, but how many of you have actually done it ???

Schrödinger's cat - so which one am I ???

Rod, we have to accept that people prefer to take a shortcut to fuel injection, be blissfully ignorant of their fueling distribution, accept sub optimium power and then wonder why they melted a piston or valve.

It's dissapointing because, as you and I know, taking the small steps to do the job properly is easy.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."