The difference between power estimates for the 24 and 28 is <3%, a difference which is within range of 1 deg of ignition timing in sensitive parts of the map. This is why I mentioned earlier the necessity for recording power at the knock threshold to determine the effective boost limit. Naturally, the 'safer' the tune, the greater increase in boost pressure it will tolerate until the knock threshold is reached.

Just FYI for the masses.

 

the 24 and 28 are as maxed out as im willing to do on my car... im sure a little more power can be had, but i think i've done enough damage for one day, week, month, year lol


ill be satisfied once i give the 22 pound the same tune i gave the others and i'll go from there into decieding which map is best for my car..

cheers!

 

4WS -- Just to confirm: Are your 22 and 24 peak psi maps using just 93 or 93 +Meth? If you are using just 93 octane with those, would you please post your mods as well as provide more info on your maps?

PS -- Don't let others discourage you from experimenting / testing on 'your' car...As High PSI stated that is how most of us learn and how we have managed to push the boundaries of the Evo.

 

Some have already pushed boundries for you so that much of the research has already been done. For ****s and giggles, test your 28psi on low timing at the track against lower boost and higher timing and confirm what we already know makes more power.

I find all these people bragging about TUNER X tuned me to XXXwhp/XXXtq in 3rd gear on the dyno amusing as more times than not, their cars knock all through 4th gear and don't perform at the track or street.

It makes for a great sig for your ego, but lacks in real world performance.

 

You feel you should scold him for running 28psi because you feel others will copy him and destroy their motor. You cannot control what others do with their own cars, nor can you control if others copy him. It would not be a far stretch to think that decisions you have made have lead to the death of an EVO motor.

 

I have advised that it is not responsible to post that this practice is OK, for this forum consists of many thousands of international members and is their best source of sound information.

If someone wants to risk their own car, I urge them to learn from their own mistakes. Part of being a responsible vendor entails pointing out "at risk" practices. One of which is evidenced here.

For the third time, more boost does not = more power with lower timing.

We have never blown up an Evo, including our 575whp 500+tq 10 sec stock turbo MR at up to 35psi.

 

You should listen to above cautionary advice concerning high boost on low octane, as well as potentially terminal EGT´s. Do you have a fuel pump upgrade? Are you logging or monitoring engine Knock? Are you monitoring EGT´s with a pyrometer? Are you logging AFR´s?

If you don´t monitor knock then you won´t know when you,ve reached the limit of knock resistance for the fuel you are running. You may experience inaudible detonation and you are unaware.

 

heres the thing about that though....

since i originally posted the first log, i was able to do a little more tunning and everything is up 2 more degrees. that seems like enough timing to me... if i had an egt setup i would know for a fact how dangerous it is.

 

im running 93, no meth..

i have intake, downpipe/cutout, greddy ebc, ebay fmic, walbro, stewart warner boost gauge, innovate wideband, and bunch of other stuff the doesn't affect power


thanks for the encouragment, sure its been done before but im not going to search for threads from 2003 when the car first came out and just read what happens. i rather see it happen right on my laptop.

cheers!

 

Ok, but the only way to truly determine what constitutes enough timing for any given indicated boost pressure is to find the knock threshold in critical points in the meat of the curve.

Given what I've seen with a recent incident using the same boost pressure and similar ignition timing values, the EGT is almost certainly over 900C.

 

Please explain how high boost on low octane will spin a bearing??

Hole a piston, yes, blow out a ring, yes, snap a rod, yes, but a spun bearing I just can't imagine. . .

 

Can you please post a link to information on this. I searched all your posts back to last fall and did not see any anouncement about this. Maybe I missed it

That is a very interesting claim, seeing as how a 50trim has never even made that much power. . . ??

 

http://en.wikipedia.org/wiki/Detonation

What do you think snaps a rod? Detonation>>smashed bearing>spun bearing>no oil hole>rod ceasing to crank journal>rod snapping.

 

Excluding stock turbos because at that PSI they may be failling out of there efficiency range... so how about GT30 or GT35 sized turbos?

TTP and Ted B... seeing as you know so much about Evos... surely you keep up with results from tuners in the UK? Take for example this result:

http://www.lancerregister.com/showth...hreadid=145554

Thats 2.2 bar on pump.

If you two guys want to post on threads claiming some facts, why not post some hard data? Just saying X amount of boost on pump doesn't work or is dangerous is useless without data.

 

What is the static compression ratio of this engine?