Diy Tuning

[menicing]

Yeah I have one setup, though I won't be able to do a solid log until I've got the rego on it. Currently it has about +17 ltft idling

[Peppy_t92]

Great, that's the best way to do it.. good luck

[menicing]

Well good new after bringing over the FG SD hi-res tables into the BF tune its idling now with a 0.0 LTFT and STFT is around +/-4%

[rollex]

I've read multiple times that you can get rich detonation. I however cannot find a technical explanation as to WHY this occurs.

I understand why lean mixtures detonate as they are typically hotter. Richer mixtures tend to cool the cylinder bore/piston top due to excess fuel transferring heat out of the cylinder, same concept as water/meth injection.

How does a richer mixture again cause detonation? I understand a rich misfire, but I do not understand rich detonation.

Does anyone have an explanation?

edit: My hypothesis is as follows.

Excess fuel (eg running 12:1) causes a drop in temperature allowing more timing to be run, eg it decreasing detonation.

Absurd amounts of fuel (eg running 10:1) whilst it drops the cylinder temp, it increases exhaust backpressure and exhaust temp (due to it burning there) which overwhelms any cooling ability the extra fuel brought along.

Thoughts?

[MattyP]

Depends if your talking about knock or preignition?

Preignition essentially turns it into a diesel and you have to be crazy rich to get that to occur, 

Knock can occur at any lambda if timing is too far advanced and/or too much boost is targeted and/or compression is too high

[IH8TOADS]

Never had rich detonation myself. Bore washing would be a bigger issue with a heap of fuel I would have thought. 

[DarrylC]

Rolls (highly likely) and I will be attending the Heathcote drag meeting this weekend. It's the Sydney vs Melbourne Street outlaw meeting. PM me if you are going and want to catch up.

[El Andrew]

Hey guys.  Good topic - have read it over the past week and learned a lot.  I'm thinking of going down the DIY route and so am starting the process of reading and learning.  Have also joined the HP Tuners forum and downloaded the demo software for a play.  I'm liking the HP Tuners route as I can easily edit and experiment myself at a relatively low entry cost - not much more than paying someone to tune my car once off.  I'm also looking to learn more so than generate massive numbers, and might make progressive upgrades over time.

 

Car is a stock BA with 150k, 3" inch 100 cell cat and 2x2.5" catback.  Everything else is standard, including the tune.  I'm thinking that is a good starting point, as while I learn I can easily flash back to the factory tune if the car isn't behaving and I need to get to work!  Once I get the hang of that, I'll start looking into injectors and pump.  Intercooler upgrade?  Meh.  I live in Canberra.  That's a pretty massive improvement to IATs already.  Probably won't bother tuning the BTR, unless there is an option to tune out the adaptive rubbish.

 

I plan to do plenty of reading over the next six months or so while my time is taken up with a few other things and if I feel like I'm understanding it all enough, drop the cash on the software.

 

I've ordered this book to learn a bit more about how turbo systems work as some good background:

https://www.bookdepository.com/Turbo-Jay-Miller/9781932494297?ref=grid-view&qid=1499827309182&sr=1-10

 

Does anyone have any recommendations for good books about tuning generally that would be good for a beginner?  A quick Google suggests that the Greg Banish stuff is well regarded, so I'm looking at something like:

https://www.bookdepository.com/Engine-Management-Advance-Tuning-Greg-Banish/9781932494426?ref=grid-view&qid=1499827416736&sr=1-1

 

At the very least, I'm already learning a lot more about how my car works which is great.  Good work to all of you who have posted useful information up here.

[rollex]

The LaSota tuning guide whilst aimed towards US cars is pretty good and shows you things specific to HPTuners. Greg banish is a good one as well if you can get a copy of the videos.

http://www.lasotaracing.com/

 

Otherwise recommend reading all of these which are free and will teach you a lot of the important stuff.

 

SD Tuning

https://www.hptuners.com/forum/showthread.php?48134-Speed-Density-on-the-BA-BF-Australian-Ford-Turbo-6

 

Post about injector slopes

https://www.hptuners.com/forum/showthread.php?48134-Speed-Density-on-the-BA-BF-Australian-Ford-Turbo-6&p=442928&viewfull=1#post442928

 

Paul Yaw on injectors

http://injectordynamics.com/articles/ford-injector-characterization/

http://injectordynamics.com/articles/drillbits-and-dipsh*ts/

 

A dodgy example of how to tune (lol)

https://www.hptuners.com/forum/showthread.php?51566-Slack-dog-tune&51566-Slack-dog-tune

 

More EFI terminology

http://www.efidynotuning.com/fuel.htm

 

My tuning adventure

https://www.hptuners.com/forum/showthread.php?53120-help-rolls-transition-from-a-tuna-to-a-tuner

[El Andrew]

Thanks! That gives me some stuff to read.