NO actually i think he is saying the same thing. Correct me if im wrong but he says that he doesnt understand those who say it CANT be made to mimic realworld conditions.
You guys are on the same page.

 

Yep

shiv

 

Some suggested by works are temperature/air flow is much different than real driving conditions, and you are only dynoing in one gear. Another that crossed my mind, is if you tune in mid summer, you might be "off" quite a bit in cooler/drier conditions (maybe the car adjust for that, I dunno) - again, I am a novice and so am only raising questions.

 

Agreed 1,000 % with one caveat - anyone running a air intake kit on the Evo best NOT use any base maps - we have to tune them all from scratch they all read differently

 

Any tuner who is good can tune the car just as well on the dyno as on the road and visa versa - they both have advantages and disadvatnages but once you learn them they both will yield very good results

 

Ok sorry, it was just a misunderstanding Shiv... thanks for clearing that up perfect works.

 

OK, I don't know crap, but, if my plugs aren't gapped properly, I want them fixed rather than allowed for. If they're allowed for, what happens if a tech fixes the gap or, God forbid, my plugs get replaced at their normal service interval, or just because?

That being said, I'll always agree that a flash specific to my engine and on a dyno will always be better than a mail-order flash.

BUT... I don't live in CT. I'm in Illinois. My atmospheric conditions are different.

I want my damn custom flash to allow for the climate and conditions in which I drive!

I mean, you know, in a perfect world and all... *laugh*

 

Well, it should be simple to check and regap or replace plugs as needed before getting a reflash and tune..... As far a living in IL, I'm sure that if you find enough other guys who are interested in getting this service, some tuner or vendor will be happy to come to you.... That's what we are trying to do here in Atlanta.

 

The problem of low HP producing evos is NOT related to spark plug gap issues at all ! The rough power bands are caused by knock correction activity of the ecu - which could have several causes - more on that at 5

Here is a stock evo that was making power in the mid 220's with a rough power band - my base line stock flash brough him up to 230's but super rough In order to test out Shiv's lovely theory - we just left his plugs alone and poured in some 116 octane race fuel into his tank - not surpizingly his issues went away immeditely and he was right in the power range we expect with the base flash

At least on this chaps Evo - the spark plugs were NOT a problem - it was fuel related

In the comming weeks we will test out Shiv's theory on all the stock evos we find which are low in power and see what we find is the cause of the low power

At least in the first case it was not low boost of sparg pulg gap

 

Uh.. Ah?

See that big dip in the midrange? Yes, the one that is *still* there on race gas? Yes, that is ignition retard caused by misfire. That shouldn't be there.

Shiv

 

Actually - that area represents a slight reduction in ign timing we put in that point of peak cylinder pressure to prevent detonation in that area.

This also was not the final tune on this car - it was the base map done before and after the introduction of the race fuel

BTW - we had one other car earlier in the day which presented a difficult challenge to make power without detonation. We tried your suggestion and removed the plugs and they all were in perfect condition. The root cause was again BAD FUEL which made extracting more power than stock very difficult. By making numerous corrections to timing and running the car very rich we finallhy were able to get some good power gains. It was simply the tune that was needing careful adjustment and NOTHING to do with plugs.

Finally - we sure wish the answer could be as easy as "tuning" the knock sensor - however - we feel the knock protection is a very good feature on these cars and would not alter of adjust it in any way - even if it means loosing out on a few extra hp.

I realaize is must be a great challenge to tune the 91 octane cars without turning down the knock sensor - but that is not an option we care to follow.

 

So all those big midrange dips are on purpose?

 

I told you - its not the finished tune !! We were merely testing your theory on a base map - 92 vs 116 - take it for what is worth !

here is s representative tune of our end results

 

Of this one - not a bad power band I think?

Just because you make major power does not mean it has to be a rough power band

Maybe when you get a stage 2 together we can compare powerbands ?>

 

Al nice work bud. I was working and unable to see you yesterday. I really wanted to run her again to see what she can do with the boost at 23psi. But let me know when your free again.
As always keep up the good work.