What are your EGT's?

[shelbyplaya]

I find when i start my car my EGT's go up to about 10 then drop down to 8 at idle. UNder normal driving they stay around 12. Is this normal?

I have my EGT probe in #4.

Thanks in advance.

[overlordsshadow]

10? 8? 12? Almost sounds like a/f but you say egt probe? 10X100? 1000 F?

[Turbo224]

I find when i start my car my EGT's go up to about 10 then drop down to 8 at idle. UNder normal driving they stay around 12. Is this normal?

I have my EGT probe in #4.

Thanks in advance.

Yeah, I believe that is pretty normal. Mine (R/T) likes to sit about the same places. On the freeway I have seen it hang around 1350 at times. I think anything over 1600 is the danger zone. I have not driven my Omni enough since I put it back together to know where it likes to sit. So maybe 8v stuff is a bit different.

[Russ Jerome]

Is this normal?



That's normal, dont read too much into it until at WOT.

With them in all four runners you can spot dead inj
or wires even at idle.

[shelbyplaya]

That's normal, dont read too much into it until at WOT.

With them in all four runners you can spot dead inj
or wires even at idle.

That would be a good idea. I use Prosport gauges. Eash EGT package is only $125 for everything! might buy a 2nd one and run it in #2.

car goes on the dyno this weekend. Might use the n2o ;)

[dds78910]

Sorry to talk about a different car but, my buddys 95 eclipse gsx with a 2.4 stroker motor and a 60-1 turbonetics turbo runs 1950 degrees at wot! I just thought it it was amazing tought I would share.

I have a autometer phantom guage for mine, but I havent installed it yet. So I'm not sure what mine does.

[Russ Jerome]

Sorry to talk about a different car but, my buddys 95 eclipse gsx with a 2.4 stroker motor and a 60-1 turbonetics turbo runs 1950 degrees at wot! I just thought it it was amazing tought I would share.



I spend a lot of time lurking on other boards trying to suck up
there knoledge, those are HIGH numbers. Aluminum is aluminum
and DSM pistons melt at the same level ours do. The more efficient
a head is the less prone it is to high EGTs and failure, the DSM
head is nearly identicle to our Hybrid head and the BSFC of a 2.0
would be very similar. I personely aplaud his/her attempts to run
that high :) What kind of times does he/her run?

Cam timing effects the EGTs as much as base timing and fuel, be
interested in knowing exactly where his setup is dialed in at as
far as base (electronic but still readable) timing, full advance,
retard during boost, IN/EX timing and Inj duty cycle vs size and
fuel pressure.......I would be asking him a lot of question :)

[shelbyplaya]

When should i start worrieing when it comes to my EGT's?

[Russ Jerome]

When should i start worrieing when it comes to my EGT's?

That depends on a lot of things, even though aluminum technicaly
melts at somewhere around 1200* EGTs dont realy show the temp
of the piston but the unburnt combustion leaving the comp chamber.

Factory 16v turbo car's regularly hit *1700, at factory HP ratings.
Factory 8v *1500, again not under a lot of load like we like.

Well tuned drag cars using crazy cam timing will hit *2000 for
7 seconds strait, thats with a lot of support items not including
alcohal or methanol misters that can drop those temps *500.

I have never ran anything other than 8v cal's on my 16v setups,
pretty low stress and *1650 was about the highest I ever saw
even after 10 mile runs of 140+ mph at 25psi boost.

[shelbyplaya]

SWEET!

Well i just got a 3bar/+40 cal thats set up for a g-head. I'm gonna be putting it on the dyno tomorrow. I've seen my EGT's go up to around 1600* but no higher.

Anything I should worrie about running a 2.5l g-head 8v cal on a hybrid 2.5l?

[dds78910]

I spend a lot of time lurking on other boards trying to suck up
there knoledge, those are HIGH numbers. Aluminum is aluminum
and DSM pistons melt at the same level ours do. The more efficient
a head is the less prone it is to high EGTs and failure, the DSM
head is nearly identicle to our Hybrid head and the BSFC of a 2.0
would be very similar. I personely aplaud his/her attempts to run
that high :) What kind of times does he/her run?

Cam timing effects the EGTs as much as base timing and fuel, be
interested in knowing exactly where his setup is dialed in at as
far as base (electronic but still readable) timing, full advance,
retard during boost, IN/EX timing and Inj duty cycle vs size and
fuel pressure.......I would be asking him a lot of question :)

I have been told that the pistons seel less temp than the exhaust manifold, because of the air coming into the motor, cold fuel, oil being splashed on the bottom of the pistons, etc. And the exhaust manifold only sees heat, thus it being hotter than the pistons. I could be wrong though.

I forget the exact times of his car, but I remeber it does mid 11's and it does 1.8 60' times and 5.0 in 330' at 4200' elevation. But I'll need to ask him for some more #'s to be more exact.