mchuang

iTrader: (11)

See that is what I am refering to, mitsu is playing it safe which is understandable, since they are producing a turbocharged production car in which many things can easily go wrong and cause the car to blow up.

jcsbanks

I wouldn't let anyone near my knock filters or timing map without someone doing realtime knock monitoring, not just checking the plugs afterwards.

This sort of behaviour of sporadic minor knock counts/knock correction is typical on a turbocharged engine IMHO. I believe it is near enough that I don't need to fiddle with the filters on my car for road use with a variance of fuel quality tank to tank, and different EGTs, intake temps etc. You can never control all the variables run to run. This is exactly why I like good knock control because it picks up this minor stuff and generally prevents it becoming a problem.

Having stopped for 30 mins, what were your post intercooler temperatures like before you gunned it again - I find it can take several miles for them to normalise again after being at say 60C after sitting for a while.

mchuang

iTrader: (11)

There were turbo cars out before this type of knock protection, so it is no big deal. This is a streetcar and variables do change and any tuner in his right mind knows not to tune a streetcar on the edge. I trust my tuner enough to where if he weakin the knock protection somewhat that my car will still be tuned safely. He tuned my 2 other turbo cars without knock protection 1 on AEM and the other on an afc with vpc and they never had any problems. I never said I was gonna turn it off anyways, I just said I was going to make it less sensitive. Anyways gotta pay to play, if you wanna go fast.

jcsbanks

Older turbo cars didn't run on pump fuel at 20 PSI on 8.8:1 compression ratio and make amongst the highest specific output of a production engine though.

I find from listening to the engine through det cans that a degree of timing is enough to go from no real noise to obvious detonation - it avalanches. Since we only have 1 degree timing resolution on our 8 bit maps it will be interesting to hear what gains you get.

jcsbanks

You'll note I was talking about torque, not power.

Hondas doing 120 or so BHP/liter/bar is only what they do stock. Doing > 100 lbft/liter/bar is a completely different story altogether.

dudical26

iTrader: (17)

With my stock map getting a little knock like that, is it safe for me to upload the new flashed map I got from Al. The new map has significantly higher timing values.

Maybe I will just wait till I can fill up my tank at a different station and see if the knock goes away on the stock map.

travman

iTrader: (26)

your knock is fine?.....that 23 is when you lifted off the throttle, you will get a knock count then but it wont affect the car or performace...Its a audible noise that is picked up, no biggie. I picked up 9 counts at 7000 rpms and was 0 until then but it was when i lifted and started slowing down....you will see that, other than that 1-2 counts is nothing at all. From what I heard, worry a little at 20, worry a lil more with 30, and when you hit 40+ its just plain funny to see it on your log chart but still wont hurt anything unless you prolong it....This is from my friend with a 1G who is very familiar with ecu tuning....but your 23 counts comes at the moment you lift so it doesnt even count. Your good to go

jcsbanks

Not 23, that was timing, just mis-spaced log.

I've mapped out my lift off clunks as I didn't like the sound of them.

Ludikraut

iTrader: (17)

Yeah, I'd do some more logging before I would upload a map with more aggressive timing. Better safe than sorry.

l8r)

dudical26

iTrader: (17)

I agree, I am just very surprised that I would be getting knock on a bone stock evo with 93 gas in it. It was warm last night but not super hot. Unless it is common for Evo's to get some knock even in stock form, I think the only likely culprit is bad gas.