Specialist Components 5 Port Kit for A-Series
Turbo Mini Forums

Ok, yes I know its a narrowband for sure on the WRX pre-turbo. Thats what I was trying to work out - The datasheets confirm a wideband is obviously susceptible to the temp and pressure as opposed to narrowband (I wouldnt use narrowband anyway)

Ok, ill spend many hours now researching - you guys dont mind if I bounce my research and findings off you??

Peter

1132cc Turbo ~120 bananas ATW - Fun Fun Fun

Yes, widebands suffer from pressure, I believe because their internal workings involve a pump cell arrangement.

As far as I'm aware narrowbands aren't pressure sensitive which is why I guessed that one must be a narrowband. Also they can stand higher temperatures.

But they aren't really much use in our case as they don't have the range that we tune over.

There is a very good write-up on the TechEdge site on how the wideband sensors actually work for anyone who is interested.

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

Paul and Rod, I notice you use only two tapping points whereas Graham has three (one for each exhaust) Can MS resolve AFR fast enough to distinguish between firing events? i.e. is it worth me adding the other outer tapping to get the extra information of the outer cylinder?

1275 N/A Sprite, 998 T2 Turbo Mayfair
1275 EFi Turbo

MS won't be able to resolve the AFR fast enough to get different values for cylinders 1 and 4. However, sampling exhaust gases from both cylinders will allow you to monitor the AFR and adjust fueling accordingly.

I think Rod uses a third sensor downstream of the turbo which is another way of monitoring the AFR from all cylinders and it may be a more effective way of adjusting injection timing.

Jean

http://www.jbperf.com/

Dan,

In addition to what Jean says about MS, I don't think the wideband controllers themselves are capable of resolving individual pulses other than at very low RPM (and then you would need a scope to see). Innovate claim theirs is good up to about 3k RPM... but no real proof.

I think Graham's idea for getting a 1 and 4 average is good.

As Jean says I have a third wideband after the turbo - you can see the plot earlier in this thread - mixed results so far, the inners and outers and after turbo follow exactly up and down, but there is an 1-1.2 AFR offset between the after turbo one and the other two even when the other two are so perfectly matched with the siamese code.

We believe it is the difference between TechEdge (the first two) and Innovative (the 3rd one) and possibly analogue vs digital inputs.

I'm in the process of swapping over to 14point7 for all three (maybe four) using Jean's IOx-OEM and a couple of PCBs I've made up for the IOx-OEM and some 14point7 SLC modules, so they will all be comparable digital inputs.
I'm just waiting for the PCBs to come back from China/HK.

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

Ok, kit has arrived except one part (was still in production)

For the life of me I cant work out what this is for!!!

Anyone know?
John? Simon? Wil?



Cheers,
Peter

1132cc Turbo ~120 bananas ATW - Fun Fun Fun

My kit didn't come with that. Must have been out in by mistake.

Can you explain how the boost solenoid in/out nipples are setup? I cant see anything on it

1132cc Turbo ~120 bananas ATW - Fun Fun Fun

Boost solenoid?

Mine came with a map sensor. That just gets a vac/boost feed from the manifold.

Yep I got the MAP, FPR and boost valve

1132cc Turbo ~120 bananas ATW - Fun Fun Fun

looks like an electronic 3 leg bleed valve. actuator signal in one leg and out the other with the 3 as vent to atmosphere.

You'll have to flow through it with and without current to see which one is which.

Looks like you have one of these:

http://www.ebay.co.uk/itm/Fuel-Pressure-Re...=item58899b11f8

Oh dear.

On 13th Nov, 2011 pristic said:
Ok, kit has arrived except one part (was still in production)

For the life of me I cant work out what this is for!!!

Anyone know?
John? Simon? Wil?



Cheers,
Peter

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."

What sort/brand of FPR would you recommend for efi Paul?

I'm getting much greater reliability from the FSE - Sytec models.

Edited by Paul S on 14th Nov, 2011.

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."

Thanks.

I have one similar to the link above, but I think I would rather fit one that has more proven reliability now than later...

I run those FPRs on the Sprint and TT both bought from ebay. no problems yet.

I took one apart, and there's nothing too it inside to go wrong, much like the metro turbo one.

There are lots of there for sale, at lots of different prices, all look the same. I'm sure a branded one may be better, but as I said, pretty simple thing, so I'm not sure how much better it could be.

Edited by wil_h on 14th Nov, 2011.

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

www.twin-turbo.co.uk

Mine started playing up once I fitted the turbo. Sudden lean out whilst on boost - not ideal.

Cured the problem by fitting an FSE- Sytec. That's been fine since November 2009.

Maybe my bad luck but the internet is littered with similar stories.

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."

Was it full of kitchen towel?

Ive been using a weber alpha one for years with no problem. Like Wil says, nothing to them, only a piston and spring assembly in mine.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

^^^

The Weber Alpha regulator is a quality item, as the name would suggest. available in several fixed pressure settings and now also available in an adjustable version, however, why anyone needs an adjustable regulator, I have yet to work out, its just one more thing to twiddle with un necessarily

Currently I use the Malpassi unit... ill use the one with the kit though and go from there.

1132cc Turbo ~120 bananas ATW - Fun Fun Fun

no update since? =)

Not anytime soon but in future have thought about trying the sc 5 port injection on my motor... from what i can work out from this thread that its not very good on higher psi rating? Im running about 14psi at the moment, ill never be going 20+ but maybe up there one day? Is that a no no for this kit?