Jet's Tuning (Oh No)

[ratter]

flow through inlet, flow through return, pressure on inlet, fuel temp, ethanol content and then a heap of calculations based on retrieved data

[JETURBO]

Hey iam gunna keep asking questions and u can tell me to bugger off if iam delving into the secrets of your tunes ok cause I dont know where the line is

So when it comes into timing on a na engine how much timing advance would u run at max torque ?

Is there a rule of thumb on how much timing u need to be away from knock conditions ?

[freeze_dk]

why dont you chuck your car on the dyno so you have more knowledge of the actual car your thinking about playing with?

[JETURBO]

Yes that will happen

But that isnt the point of this yet its about some base knowledge and build from that, something like this takes years to perfect and iam at the bottom

Plus id rather flog the guts out of tafe cars wile learning the basics

[Mr_4.0]

I've never found a set "rule" when setting timing on na cars. There's a little trial and error involved. Two ba xr6s might take quite different timing at max torque to be optimal. A lot of things can make this figure vary.

How far you wind the timing back from detonation is personal preference. Its a question of "how safe do you want to be?"

This is my opinion.

I wouldn't mind doing a course like this.

Which TAFE is this through? Curious if one in my area has something similar.

[JETURBO]

Yeh most definately how safe is the point !

Is it definately common practice to place an engine in knock condition to know where that point of timing is ?

[Paulie2256]

With 98 I think you would need it to knock to know where the limit is. This is where equipment like the knock box are handy. I think Mick uses a different type of sensor..

e85 you just keep going until power figure drops.

that's what I have learnt lol

Edited 21/02/13 04:20 AM by Paulie2256

[turbotrana]

There are two parts to tuning.

1. Knowing what timing and airfuel ratios you need to get to

2. Knowing how to make software changes to get to the desired timing and airfuel ratios.

Trying to learn (1) with HpTuners or any other non live tuning is way too cumbersomb.

The best way to learn (1) is with live tuning hardware/software as you can quickly make changes and learn alot quicker as to what is going on.

The first thing you need is a wideband on your car and observe where the fuel ratios should be.

Courses are OK but I think reading whatever you can get on the subject is where I gained most of my knowledge.

[freeze_dk]

Jet can't read

[ratter]

there is no magic number that suits all cars when timing is involved, as mentioned already, 2 similar cars may require different spark values, which is why one reason generic tunes are not a good idea.

As far as a safe number that's an individual thing and engine design can have an affect on this as well, but I have to have a laugh when I see guys posting on here about there tuner is that good that there was not a sign of ping during the whole tuning process, great but how close to the knock threshold are they, you do not know this until you get it to ping lightly and then back away from that point.

Hopefully your tafe has a wolf or microtech etc for you guys to play with, these offer live tuning but are very very basic compared to the late model factory ecu and will be easier to learn on before venturing onto more complex systems