Fe3Boost

Well I guess you dont know the stock ecu very well. Also I am not getting into a pissing match over this one. But if you do research on the ecu and its function you will see the vent values are always adjusting them selves. We dont even know what mods he has or anything so I cant speculate. But I worked on these things for a living so I have seen alot more than most. Also you said you went from 4psi to 14psi so that is enough to break any 3rd gen motor on the stock ecu settings.



The only way the apex seals break is from detonation they dont wear out well if you had 195K on the motor maybe but lets face it they will never get there .



Here is a challenge for anyone who wants to test Sinful7 theory:

Take all 4 vacuum hoses of the duty solenoids(underneath black tank)

and report what happends to your motor after a few pulls.



-Ryan

Sinful7

Duh. I'm saying that the ECU Vent Values should not be allowed that far out of range that when you make a repair the ECU leans out until the motor pops. And if it were to allow the reduced vent value to become nominal it should correct itself upon repair.

Fe3Boost

It leans out because of the overboosting. I think your getting it now.



Stock ECU can only do 11-12 psi maybe 13psi but that is it. Sometimes not even that. Remember obdI is old school!

Sinful7

Why on God's green earth did you use a boinking smilie? Jeez.



Anyway, I think it's you who is learning. OBD-I is exactly my point. The ECU can't really learn that 2PSI is nominal boost, therefore, can't compensate that much for it.

What I'm saying is - at 2PSI, the ECU did not think everything was hunky-dory and revalue the fuel maps accordingly. It may have been compensating to a degree, but not enough to rewrite the fuel values for it's programmed boost levels - 10PSI. It's not like it's overboosting way above of the stock maps.



Oh, and just for ***** and grins here, I was running 14PSI on the stock ECU, stock maps for awhile on my new motor. Never had a problem.

PhoenixDownVII

So what you're both saying is:



If I retune my ECU I'll be runnin' 9s?

Fe3Boost

Well the ECU never adjust the fuel maps (well at least on the 3rd gen) If is a fixed map. At WOT regardless of what psi it runs that map.



I am done with you!



It is obvious you should have worked for Mazda

Sinful7

So how in the crap does it lean enough to blow the motor when you make a repair to get back to the factory boost levels. If the fuel maps are the same regardless of boost level, then it would've just been stupid-rich with the boost leak, and normal with the repair. Are you saying that the simple OBD-I ECU learns that 2PSI is max boost, even though it dumps in as much fuel as it would if 10PSI was max boost, then when you repair, it thinks it's seeing a spike of 500%, then for some reason leans out the fixed fuel maps and pops the motor? You'd think if the ECU was that smart then it would learn to read the values from the MAP sensor and compensate.

Fe3Boost

I am not trying to be a asshat here. So here we go:



when you fix a boost leak that has not been tended to when it first stated it over time the ecu keeps turning up the vent value until it maxes out. O.k. now when you go to fix it and she is running good the ecu should be recalculating everytime so on your very first pull it should spike. Sometimes you got crappy turbos and they wont spike because they suck. Now he said everything was fine 10-8-10 pattern right. I can tell you that if it was in stock trim with a catback it will not blow up. I have gone to redline in 4th gear on a dyno with those exact mods over and over again and it never blew up. So it is my personal expeirence that it over boost and that is why it broke.



there are 2 reasons why 3rd gen motors usally break

overboost and coolant seals



thats all for me

laterz

Sinful7

This is the only thing you've said that makes any sense. But it's not overboost that causes failure, it's preignition or detonation.

Fe3Boost

Quite original



I think you need to come up with something better than that.



Maybe I will see at rotorfest or some meet and you can say it to my face.