I just tried a different Mivec map on my 9 and found some things that i had questions about.

My mods so far are HKS RS intake, Hallman MBC @ 21psi till redline with a 23psi spike.

My map that i have been running was this one found in this link which seems really aggressive... http://i44.photobucket.com/albums/f28/ae86one/tune.jpg

My logs indicated low levels of knock (1-3 counts) sporadically through out the RPM band under wide open throttle. With DLL, i graphed a third gear pull and recorded 319hp/301tq.

I decided to flash the JDM RS Mivec map found in this thread https://www.evolutionm.net/forums/sh...d.php?t=251781 thinking it would make less power, but be safer (Less knock)

I was wrong. What i found was 0 knock up until 6000rpm when i would get 9 counts of knock till redline. Power went from 319hp/301 to 324hp/303tq and the graph looked smoother throughout. These were back to back runs, same road, same conditions, just changing Mivec maps.

My only thought is that because i do not have any exhaust work done, I am creating too much backpressure causing cylinder temps to get too high and thus knocking.

Has anyone else tried these maps? what did you find and what were your mods?

 

of course use 3 '' pipes and hks or blitz muffler and cold aır ıntake and fuel pump allı art sport termostat and racıng buddy club condenser to stabıl electrıc

 

MIVEC has never caused knock that I have found. I think most of your problem lies in the stock catback. You outlined the reason, back pressure raises EGT's, high EGT's will induce knock if everything else was equal.

 

Of course meaning you used these maps? And are these your mods that you listed? Sorry, i am having trouble following what you are trying to say.

My exhaust isnt coming for another week and i really wanted to get rid of knock, so i adjusted them JDM RS map to look like the aggressive map above 6k. What i mean by this is putting all values 6500RPM and above through all load cells to 0.0 and and boost load above 6000RPM.

After i did this, i went out to the same road and with the same temp as previous and flashed the new map.

I found that the 9 counts of knock were eleminated completely and no timing is being pulled now. Once i get my TBE on i am going to re-test and see if our assumptions are correct about backpressure and high RPM cam phasing

NOTE: power differences between the two runs - stock JDM RS map 324/303 Modified JDM map 335/303 from DLL

 

John, what do you think about smoothing the mivec map from the 5500 rpm to the 7500 rpm (for example the 220 load column). As someone suggested when I posted those maps

4500 24
5000 19.2
5500 14.4
6000 9.6
6500 4.8
7000 0

vs

4500 24
5000 14.4
5500 14.4
6000 4.8
6500 0
7000 0

 

The JDM map is kinda smoothed out up top, where as the one i flashed just zero's out past 6500RPM.

I got better results with my setup just zeroing out. I have a feeling it is because my exhaust is still stock.

 

More or less thats what I am doing. It seems that some cars respond and make power where others will lose the same amount gained on the previous car. Any car though that is knocking right before peak power is losing overall though, so whatever it takes to remove unknown variables.