attached is my timing values. a bit more agressive to nj1266. however, pay close attention to the different values in the load columns between the two.

 

There shouldnt be any negative timing numbers on the map.

 

Are you refering to the load cells that the car is hitting or to the entire map?

 

Scott is talking load cells, and I agree. As far as the 300 load 20rpm cells, those can be negative. NJ your timing is good starting point, its very conservative. I personally wouldnt have the negs in the higher load ranges because at some point it might be able to hit those. Keep the maps as linear as possible and you wont have offboost transition knock like he is getting when he lets off the gas. Thats not phantom knock...a few counts of knock is ok when letting off the pedal because it goes from low timing high load to high timing low load. That timing jump will sometimes cause some knock because it happens so fast. Its fine.

Heres my 100 octane map, its for cosworth cams, but its just an example. This would be more in the "linear" school of thought. Made 340/380 with this exact map actually. Might not work bad for a stock car as a base map, cossies take a little less timing than stock even with 100 on my car. Probably because of HFC, the car with my same mods but with test pipe and o2 houseing took 2-3 more degrees across the board.

 

check on ebay right now lc1 kit with software and all the right stuff for 289 with free next day air. cant beat that.

 

Wow that timing map looks familiar

 

Why is timing so low in vacuum?

 

I didnt do that, but as I recall he was having weird cruising knock or something. I can go look for the email. I leave that area alone for the most part maybe only dialing in a little more idle timing and smoothing the transition as the clutch comes out.

 

+1, NJ's timing map looks very similar to they way mine turn out after dyno tuning, except they are more retarded due to 91 vs 93.

To the OP, yours is way too retarded in the load areas you are hitting through the midrange, plus it is way too jumpy. Not knocking you man, just saying go ahead and start with what nj posted. Should be much closer to where you want to end up.

 

Trust me bro, I'm not taking any offence to anything posted here. I need all the help I can get. What i was gonna do was just copy what NJ posted and try that out. Only reason I haven't yet is because my cluctch just took a dive... But that will be fixed today. What about the Mivec... what should I do with that? Personally I've been loving the Agressive on that NJ and JB constructed. So I think I'm gonna try leaving that one in.

Btw, If I put in NJ's map, and I have absolutly no knock... should I start advancing the timing until I run into it?

 

1. Get a wideband and log your AFR.
2. Copy my map into the three high octane iginition maps in your rom. Make sure that you copy it into all three, otherwise your timing would be inconsistent. Do not advance timing until you know where your AFR is.
3. Use my mivec map.

The most important thing is what ALL of us have been telling you: Get a Wideband.

 

Ok, Im gonna get a wideband asap, But do I keep using the maps the I was givin by the pro? Or do I put your timing and mivec map in until then?

 

You can put them in your rom. But if you log the car and you get knock, you will not know if the knock was caused by the timing being too advanced or the AFR being too lean. We just do not know what your AFR is and I have not seen your fuel map to judge if it is too lean or too rich.

 

Originally Posted by madmax4499 View Post
please stop. send mellon 99.00 watch and learn from him.

he's speaking from experience, I'm quite verbal with my customers so they learn quite a bit about tuning and don't have to risk blowing up their engine trying to learn it on their own.