Wolf ECU and injector sizing question

**tooch** · 18-06-2007, 02:32 PM

I've got a Wolf 3d which is sitting in my car unplugged, and has been for the past 9 months or so. It was running a rough tune for 540cc ST205 injectors, and I replaced them with a set of stock 440's when one of them died.

My question, is there an easy way to tell the Wolf what size injectors are in there now? I looked in the manual and there doesn't seem to be an obvious way to change it, like there is in something like the Power FC.

I'd like to get this Wolf running again so I can ditch my AFM and do my straight intake, and continue what I started with this car

**The Real Roadrunner** · 18-06-2007, 02:39 PM

you should be able to trim the main inj map fairly easy or there could be an overall trim setting in the ecu to do it. there website should have the info or just call one of there dealers and they should be able to talk you through it.

**tooch** · 18-06-2007, 02:55 PM

Oh yeah there is an overall trim setting in there, so is it a matter of trimming it by the percentage difference between 440cc and 540cc?

**The Real Roadrunner** · 18-06-2007, 04:19 PM

short answer yes, that will get you running but the tune may still be off.

**tooch** · 18-06-2007, 04:29 PM

It was only a rough tune anyway, so maybe it's easier if I just try and get hold of the base map that this one came with,

**chris davey** · 18-06-2007, 07:32 PM

base map will probably be further off than a retrimmed current map unless it is terrible to start with.

**tooch** · 18-06-2007, 10:25 PM

The map wasn't too bad, ran fine but just hadn't been dyno'd yet, and was done before the motor was run in properly so was fairly conservative.

**Hen** · 18-06-2007, 11:41 PM

Yes, I can confirm that just setting the overall injector trim to +23% ((540/440) - 1) * 100%) will give you a reasonable compensation fot the now smaller injectors.

A friend did this using my 4A map (mapped for 365cc, but running 440cc) and it ran and drove fine til he got it tuned.

Hen

**tooch** · 19-06-2007, 09:15 AM

Sweet as, thanks Hen!

Will give it a try this weekend.

**Classique71** · 19-06-2007, 10:17 PM

Still seek getting it dynoed ASAP with the 540's tooch!

**tooch** · 19-06-2007, 10:37 PM

Stu: Ideally later on I'll stick a new set of 540's in, an FPR and bigger fuel pump. I was just going to stick the Wolf in and get it running on the 440's for now. But who am I kidding, I probably won't even get around to that, it'll end up waiting months most likely.