Different day ,different car .................same shit !!!!

Okey doke, so we have 2 injector output's from the ECU each driving 3 injectors wired in parrallel, yes ? That's potentially a lot of current if the injectors are low impedance. I wonder if the injector outputs are struggling.

All in and running fine ......apart from I need to fine tune the TPS again as I forgot we did that on the car when Dave was here Scoff ,I've lost it out the new map .I've set it as best I can but a little hesitation has come back .MAT is more sensible now ...not reading 80c all the time

Right ! thats me done as far as I'm willing to do without AFR , when's good for you Chris

PM for you lee

Okey doke, so we have 2 injector output's from the ECU each driving 3 injectors wired in parrallel, yes ?

On the Renix, yes, the Adaptronic has 4 injector o/ps which for batch-fire all get tied together and parallel wired to all 6 injectors.

They're low-side fet switches and carry a max of 12A (inductive), 28A (resistive). More than sufficient for what we're driving.

Thanks Martin, I know how the Adaptronic works, I was interested to know how people had wired them incase Adaptronic ask me, should they ever bother looking into the problem.

So to get round the problem an I going to be able to get away with the rising rate fuel regulator or am I going to have to buy bigger injectors ? If its a problem with the injectors getting a good signal is there an easy fix we could try?

Hi Tony,

Yes, regulator should do you fine since you are not that far off your desired boost. If you use a 1.7:1 rising rate regulator then you should have enough fuel. The fuel map will need linear reduction to compensate for the regulator, I can send you something that I think will be close.

Really though this is something that needs setting up while you watch AFR closely. It is a shame you are so far away. A last option would be to fit a regulator, install a modified map and take it to a trustworthy dyno to have the fueling checked.

The FSE rising rate reg is linear up to ambient, and rising rate throughout boost.

Fuel above 100kpa will need a linear reduction. If the base pressure at atmo is set to 3 bar then below 100kpa on the map should continue to work fine.

I just re-read what you ment Martin, I'm not sure that they work like that. I expect that they are linear throughout! They are sold as "power-boost" valves to the uninitiated and designed to work with NA engines too, if not primarilly. They will richen things up toward atmosphere, which is why I suggested setting it to 3bar at atmo instead. Doing that may actually lean things off toward the bottom of the map, I'm not sure, I usually stay away from rising rate regulators.

By way of an update I heard back from Rob at Adaptronic. He tested my (Tony's) ECU file on the bench and it worked fine upto 22ms, he did not see any issue at 18ms but like me suspects that the injectors are just not happy at such large dwell times. Hopefully we'll see tomorrow if the bigger injectors solve Lee's problem.

Hi Scoff,

It's been a while since I looked at the technical detail of the Adpt, but it may be more to do with the driver stage in the ecu than the injectors. The low impedance injectors are optimised for a peak and hold current drive, much like a pulse amplitude modulated signal. As I remember the Adpt output stage is fold back current circuit (but a long time ago that I had a peek about the PCB), and this may not suit long duration high current drive periods. I have not tried, but may get a state where the injector isn't fully open... not sure on that, seems possible from your descriptions though.

Can you not go over to high impedance injectors and also reduce the ecu self heating issue at the same time?

Just a thought,
Martin

330cc injectors in and running a big old BAR of boost
Really does pull and not a hint of anything amiss ...

I think you need to get some bigger injectors Tony ...I'm coming to get ya

Would seem sensible to get something around the 4-500cc mark. Any ideas if anything was fitted to cars with this sort of range so I can get some 2nd hand ones?

330cc injectors in and running a big old BAR of boost
Really does pull and not a hint of anything amiss ...

I think you need to get some bigger injectors Tony ...I'm coming to get ya

Without opening a can of worms Lee, i wonder if what Noble mentioned re the heads as the restriction will come into play, cant remember what gt5 was getting on the rollers 260bhp ish at over a bar of boost?

Its looking like you will find out soon if they were talking c--- or not