Nialls supercharged GTi6 - project tidy up

[Niall]

Right well today was a bit better!
Started off with a trip to Halfrauds to pick up some paint and a battery earth strap. Fitted said strap and car starts much easier and happier now. No more dancing dials. Still have my lean running issues though but onto that in a bit!

My cam covers were pretty fooked seeing as i used poor paint and no lacquer so decided to sort that out. Stef gave me a set of shot blasted covers so I've painted them in.....purple!!



As soon as they are dry, i will get them swapped over which should tidy things up a bit.
Anyway, AFR issues. It seems I'm a bit of a victim to my own success. The charging and power system on most 306s these days is rather corroded. My battery positive leads has broken strands and rather bad corrosion and the car was mapped like this. Now, thats not an issue but what I've done with replacing all of the cabling is improve it all! Checking old logs, the ECU used to read 13.8-9v and is now reading 14.4-14.5v so where it should be which pleases me greatly.
Now, all ECU fuel injected cars have a battery voltage compensation table. A cars power supply isn't very clean at the best of times and this can have an effect on the way injectors work. Its not rocket science that if an injector doesn't open for the exact correct period of time, it will run richer or leaner. My battery compensation table was never set up. It didn't need it. It comes with out of the box settings which the fuel map is then based around during mapping.
So plug the laptop in and alter the site between 14 and 15v slightly, blip the throttle and dah dah! Idle has gone from 15AFR (far too lean on a scatter spark engine. Should be 13 ish) to 13. My knowledge of this is quite limited so I've emailed Omex to make sure what I've done isn't an epic bodge and that it won't affect any other tables but it should be fine as this is what its designed for.

Next job. I noticed when walking up to the car the other day my intercooler wasn't straight. Turned out my mounting methods were crap. it worked on the old one but the old one was substantially lighter! So, i CBA to have tabs welded on to the IC as that costs money so I've made up some brackets to sit on the cross member to hold it up.





Also removed my PTFE gasket until i can pick up another paper gasket. Despite PTFE being soft, i can't get mine to seal correctly seeing as its already used. Was idling at 2-3k yesterday so taken it off for now.

Jobs for me in the evenings this week. Get ECU wiring tidied up (a lot of it was mounted to the battery box), get new air box fitted, Get cam covers fitted and general tidy the bay up as its getting close to show season! Need to get a arch liner badly on the passenger side as the bay is just bloody filthy now
Ive also resigned my self to the fact this is going back for remapping. My pipework is all being welded up soon, I've now solved my air temperature issues and i will be buying new, much better more efficient injectors. The thing that was limiting me at mapping was air temperatures. Im hoping under serious load now that is fixed so lets push it harder!!