Ms Gooner 1

just had the car dyno tested 313.1 bhp

Peter 300

Wicked

gooner 1

iTrader: (11)

Michaela

On whos dreamo and with what mods?

Curious

Frayz

Ms Gooner 1

Sorry Frayz - forgot to ask you first LMAO!
Its got full de-cat, walbro fuel pump, VF28 Turbo, FMI, Induction Kit, dump valve and re-map.
Had it tested at Perfect Touch in Hoddesdon. Good day all round.
Actually I'm glad your on here - as they pulled it in they mentioned a whine to the turbo - poss bearings?? Is this repairable or do I need a new turbo?? And if I get a new turbo what type should I go for?
I was also thinking about injectors? Should i stick with what I have or upgrade to 550's? (I think thats right?)

Nate

iTrader: (2)

VF28's do whine ...... Well mine does anyway.

That was the first thing I noticed when I had the turbo change.

What injectors do you currently have, as a fuel pressure regulator may do the trick, without injectors needing to be changed.

bibo_boy

TD05

Ms Gooner 1

I may be wrong here - i think they are 440s? Is that right - tbh, I don't "do" much with that type of stuff - I's familiar with turbos, air filters and mapping - but injectors I haven't a clue LMAO.
Just going on what I've picked up from Daren!
I am interested to know though if my turbo bearings are on their way out - don't want to leave that to chance incase something goes rather pete tong!!!

frayz

iTrader: (7)

Some turbos do whine but the only way to really tell if the bearings are on their way out is to check the amout of thust end float on the shaft.
You can do this by removing your turbo inlet pipe and feeling for any play. There will be a small amount of play in the "side to side" movement of the shaft but virtually no play in the end float, the end float is the "in out" movement in the shaft. You can get the shaft by the compressor wheel securing nut beween your thumb and forefinger and pull it in and out.

There should be virtually no play at all in this movement.

As for injectors, what are your current injector duty cycles?

Any more than 95% and i recomend an upgrade or as Nate suggested a good adjustable fuel pressure regulator. TBH an adjustable FPR is a good idea anyway. The increase in fuel pressure will allow a finer mist of the injector spray pattern and thus better atomisation of the fuel.


Oh, and nobody needs to ask my permission for anything

simon57

iTrader: (2)

Thank god for that....im busting...

FLAT ERIC

iTrader: (1)

And did you put your hand up?

It's not all good sitting at the back you know.

Mark

Ms Gooner 1

Thanks for the advice there! VERY understandable

You did kinda lose me on the "what are your current injector duties though" could you maybe explain a little on that - I have no idea . I know they are yellow and I think Daren was told they are 440's!

As for the FPR - I think that is on the "list"

frayz

iTrader: (7)

Injector duty cycles is the percentage of time the injectors are open at any given time in the load table on the map, this usually happens at peak RPM.

Basically if the injectors are only running at 50% idc then they are only ever using a maximum of half of their maximum flow. (So theyre not exactly working hard) If theyre up nearer 100%, that would mean theyre almost maxed out and cant flow anymore fuel,

And either a fuel pressure or injector swap is in order. This is to inject a greater volume of fuel.

For example my "STi Pinks" (550cc) were running at 98% idc even with an adjustable FPR. We was running 3.8bar of fuel pressure at idle.

This meant the injectors were basically maxed out and an injector change was in order.

We then fitted a set of Lateral Performance flowed injectors, (740cc). With the new larger flow injectors we were only pushing approx 60% idc. So you can see the larger injectors are working well in their efficiency.

We now have lots of headroom within the fuel system.

So as you can see, larger injectors dont give you more power. They allow you to run more fuel when your current system reaches its limitations.

So unless your injectors are working way up over 90%, larger items wouldnt be required.

Ms Gooner 1

OK - that makes sense (do you write manuals LMAO)??
So, how can I test my Injectors?

frayz

iTrader: (7)

No i dont write manuals, but i build prototype engines for a living,

You'll only be able to see the injector duty in the fuel table of the map. This can be seen when the car is being mapped, providing the software used is capable of reading that data.

May i ask why do you think you need bigger injectors?

Where is the car going from here tuning wise?