Tuning is a skill. Take it slow change one thing at a time and have at it. There are alot of people that tune their own cars.

 

Which parameters should I adjust first?

 

Prolly AFR's first. I think with meth you can add a couple more degree's of timing and more boost too.

cheers

garrett

 

This would help...
http://www.fc-datalogit.co.nz/

cheers

garrett

 

Well you can start a few different ways.
You can pull alittle fuel to a safer but higher AFR. Then add alittle timing.
You can up boost 2-4#. Retune AFRs and add alittle timing.

What ever you do go slow with the viable changing. Dont think well 1 was ok 2 was better 10 will be awesome. Bad dont do that.

You can start where ever really. You just have to keep in mind that the meth has to be consistantly injected and controled some how. Do you have a kit or DIY kit with just pressure sensors. The DIY kit is ok but you might want to stage it so as you go up in rpm you kick in a second or third stages.

 

It's a digital progressive kit, adjustable from 2# to 20#.

Please explain timing + air/fuel ratios to me. I have a vague idea of how they interact and create power.

 

Well the deal is most engines make best power between 12-13.5 AFR. Every engine is alittle different like 2 valve pushrod or 4 valve DOHC. Things like that. Anyway you are most likely siting lower than that so you dont detonate. Probably 11.5 maybe 11 to 1. When you lean the mix out you make more power because the ratio is closer to optimum.

Now timing is something people go two different ways. You have the one group that likes to run as much boost as possible and adjust timing to not detonate but also make power. Then you have people cut the boost for more timing. I personaly would go for more timing but it depends on how it was tuned. Now one more thing to think about is the leaner you go to stoich(14.7) the less timing you need to make power because it burns faster. So you might find that you dont have to do a thing with the timing and just lean it out some.