Posted my maps on the bottom of the third page

I've been planning on doing another round of mods on my car and get it professionally tuned again, but lately I've been constantly reading on here and decided to go mod by mod slowly tune it myself... Thanks for all the good info.

Anyway, I threw in a set of fp4r's and the there's constant part throttle/midrang knock. The car was tuned by AMS before and you can see the mods in my sig. I started off by pulling 3 or 4 degrees of timing throughout the map and there's a couple of random knocks at full throttle, but between 3k-4.5k rpm and 80-140 load there is always 1-3 counts, sometimes more.. I then pulled a degree or two of timing in that area a few times and it did nothing.

I turned to the mivec map. It's slowly getting better, but I have had to pull a significant amount of timing from it. Has anyone tuned a set of these cams?? Is this normal?

Thanks in advance.

p.s. the afr's are pretty good, a tad rich.

Take a look at this. THIS IS NOT AN AMS MAP... I contacted recompile because I saw that he had a similar problem, and he gave me a mivec map to try and I have made significant changes to it.

 

Your big cams can cause phantom knock caused by valve train noise. Varify that it is true knock by logging Knock voltage and Knock Sum. You will see the noise as the knock sensor "fuzz" tru knock will be a huge spike in the voltage.

If you are getting phantom knock...simply adjust the knock multipler tables (increase the counts a couple points). And decrease the Knock sum decay timer to about 80.

 

It would be nice if it's phantom knock... I'll give that a shot after work today.

 

Your MIVEC map is way wrong for FP4R's and you're really missing out on their advantages. If you think you're knocking remove a few points in your high-octane timing map instead.

 

The mivec map is pretty sad , that's what I'm saying. At first I took out a significant amount (6 or 8) of timing in the areas where it knocked but the 1-3 counts of knock remained.

I'm going to compare the knock voltage and knock sum and try to determine if its real knock.

 

https://www.evolutionm.net/forums/ec...-tbe-tune.html
Here is the one i just tuned on meth!

 

For reference, this is the MIVEC map I'm using on the FP4R's (and the one I gave the OP). I have SuperTech springs & retainers.

I did get a lot of midrange knock, and I occasionally still do, especially in low gears. I may try pulling down the 3000-4500 to 19.2 to see if that heals it.

I'm running a very tame ignition timing map at peak torque as well, same symptoms, can't eliminate it easily.

 

Even the above MIVEC map isn't that great for 4R cams. You should be running max advance of 28.8 from spool-up through the mid-range.

 

Here is what I've found to work the best on the dyno (also notice the negative values in the idle range).

 

Did you look at mine?!

 

Yup! Yours looks good to me too.

 

Contrary to what FP recommends on their site, being aggressive with the advance causes consistent and high knock counts with the 4R's. That's the problem that the OP and I are seeing, it isn't the solution (in our case).

Believe me, I started off with much more advanced cam timing and assumed it was my ignition timing that was causing the problem... but after I went from 8-9* on the stock cams all the way down to -2* on the FP 4R's and STILL getting 7 counts of knock I faced the facts that 28.8* of cam timing was too much.

 

When I get some time today I'm going to play around with these maps... Yesterday, I used a more aggressive mivec map and took a few more degrees out of the ignition timing in the midrange and it seemed like it liked it. Thanks

 

Take a look at this log that I made on my drive to work. I'm using Kracka's map with a bunch of timing pulled in the part throttle/midrange section. In the log, it's Knock Voltage to the right of KnockSum.

 

Your timing really isn't that aggressive in the knock prone RPM range, in my opinion.

Looks like tip in knock to me. 3 counts when boost starts to come on.

Open your "Knock Load" table. Raise the values in the 2500, 3000, and 3500 to = 100.

You should see the tip in knock go away.