High EGTs on my way home from work tonight.

[Red04WRX]

It's about 40 degrees or so out... I left work and someone really pissed me off (a couple of you may have heard me talking about this person from time to time).  so I was romping on the gas and all was well until I got to a 55mph road... I think I was in 3rd gear, nowhere near redline, and I got over 1600 degrees on my EGT gauge, warning light went off, I let off the gas... and took it easy until I got to the next 55mph road, I turned on it and same thing.  I went to about 1650-1700 degrees, I should be okay because as soon as I saw the warning light I let off.  Just wondering why this might have happened, if anyone's got any insight on this type of scenario.  I've only had the EGT gauge in my car for a week now, and all during that week I haven't seen the warning light come on (in case I didn't make it clear, it is set @ 1600) ... I have to admit I haven't really driven my car as hard since the gauge was installed as I did tonight (because I was pissed off hah).  My boost gauge warning light is set for 17psi, and I didn't notice that going off, so I don't think I was overboosting (not that I know WTF I am talking about, so I dont know if that has any relevance)

My car is an 04 and it only has TBE + uppipe and IC hoses.  and the EGT probe is located on the pass. side manifold.

I know engine management is a must and that is coming after the 1st of the year  If anyone can give me any feedback, it would be great... thanks guys

[RedRoof2]

Welcome to colder weather.   You're going to get higher EGT's as the mixture leans out from the increased air density.  This is why people tend to knock a little more in the winter.

The MR2 tuners I know usually say you may see a hundred or so extra degrees on the hot side if it's cold out.  You're on the factory ECU it  seems, and as long as that's the case [and you dont have any black boxes screwing with it], then dont worry.  This is normal.

Wait till it gets down into the single digits.  You find the right % throttle condition and you may see well over 1700.

[Red04WRX]

Welcome to colder weather.   You're going to get higher EGT's as the mixture leans out from the increased air density.  This is why people tend to knock a little more in the winter.

The MR2 tuners I know usually say you may see a hundred or so extra degrees on the hot side if it's cold out.  You're on the factory ECU it  seems, and as long as that's the case [and you dont have any black boxes screwing with it], then dont worry.  This is normal.

Wait till it gets down into the single digits.  You find the right % throttle condition and you may see well over 1700.

As long as it's a normal thing.  will engine management help the situation?  thanks a bunch for the info, it is greatly appreciated

[RedRoof2]

Engine Management MAY be able to change things a bit, but It doesn't seem there's anything that needs help.  There's no need to screw with fueling unless the car is knocking bad and bucking. It's doubtful that there's anything harmful happening inside your engine.  Higher EGT's don't necessarily mean bad things.  Detonation is what kills motors and if your engine was putting out more heat than it could transfer into the cooling system, you'd start overheating first.  If it was detonating bad, you'd notice that too.

[Red04WRX]

ok cool... I read up a lot on nabisco and they're always talking about 04s detonating, especially those with aftermarket parts and no EM, so I'm super paranoid.  the high EGTs on my way home last night didn't help that at all

thanks a lot for the info,again it's really appreciated

[ImprezaRSX]

Air temperature correction is available on several aftermarket engine management systems. I don't think the UTEC has it. A standalone does. You factory ECU is programmed  to compensate for it, and it does/is.  Is it enough to keep you from frying an exhaust valve or piston?  I dunno. Many people delete the factory EGT probe and eliminate any last chances at the ECU correcting a problem before it gets to the point of engine damage.

Like RedRoof said, 1700 isn't necessarily a bad thing. Just be carefull. If you add a UTEC and add a little more fuel on the top end and see a drastic reduction in EGT then it's probably running a tad leaner than it should.

Until then, enjoy the winter power. It all goes down when the temp goes up!  Especially for non-intercooled bastages like me.

BTW, I know this is an old post.  My daughter is throwing another temper tantrum and I just needed to get away for a little while. Grandma can take care of her for a bit.

[Red04WRX]

roger all that

no prob w/ the old post... I'm very paranoid when it comes to this stuff, so thanks for the info

[Red04WRX]

tonight I hit the warning light on my boost gauge ... never seen 17psi before  but it's way colder tonight than it was the night when I first started hitting the warning on my EGT gauge.

[evoWiPeR]

tonight I hit the warning light on my boost gauge ... never seen 17psi before  but it's way colder tonight than it was the night when I first started hitting the warning on my EGT gauge.

just wondering, son't u more or less have the smae mods as i do......

list them off for me, maybe u jsut have a stronger motor than normal, idk, could u list them off thanks

[Red04WRX]

just wondering, son't u more or less have the smae mods as i do......

list them off for me, maybe u jsut have a stronger motor than normal, idk, could u list them off thanks

samco i/c hoses and turboback exhaust plus uppipe.  No cats, I'm allergic.

I keep reading on nasioc about how bad it is to mod an 04+ unless you have engine management first.  which I don't have and won't have for a couple of months.  so that makes me pretty nervous.

[ImprezaRSX]

I keep reading on nasioc about how bad it is to mod an 04+ unless you have engine management first.  which I don't have and won't have for a couple of months.  so that makes me pretty nervous.

interesting.
So lets do it.

UTEC or Hydra?

[evoWiPeR]

it's 04+ sti's that u need to port ur waste gate or something abd will happen, byron told me about it and i can't remember what it is.... idk dom might know what i am talking about

[ImprezaRSX]

What you are talking about is boost creep.  The STi's and WRX's suffer from boost creep when you add u/p d/p exhaust and stuff like that. Mainly due to the efficiency of the exhaust and the in-efficiency of the actuator/flapper wastegates. Porting the wastegate allows for a lower differential pressure across the turbine and therefore better boost control at full boost. Unfortunately it also increases your boost flutter at partial throttle.

[Red04WRX]

interesting.
So lets do it.

UTEC or Hydra?

UTEC


as well as a VF34, new injectors, plugs & fuel pump
hehe..


I expressed a similar concern about boost creep to byron and he told me it was just the STi's.  still, ever since having my boost gauge installed, I've never hit over 15 or so (I guess peak for a stock wrx is 14.5?) until the other night.  but it was cold as hell out also.  I figured the super low temps had something to do with it.

[byroll01]

I've never read of any WRX having creep until it was modded alot more than red's. But I could be wrong, right?

[Red04WRX]

I'm not sure.  that's why I come here looking for advice

I worry about detonation though, all them guys at nasioc say that's a real problem with the slightest of mods.  but I don't ever hear anything that sounds like marbles or gravel hitting the underside of the car (unless it's actually gravel haha)

With the research Ive done, it doesnt seem that boost creep is a problem on modded 04 wrxs without EM.  I think I just saw 17psi that night cause it was COOOOOLD (could be wrong on that also haha)