So I have a good DSP tune now. Car runs wonderfully. Anyways, driving around town I noticed the EGT temp on the scangauge was around 1,750-1,850 Something was definitely not right, as I knew the temps were not that high at 2,500-3,000 RPM's. So, I went to a desolate road and did a 4th gear WOT pull and the EGT's were bouncing between 1,640 and 1,670..., so clearly cruising temps are way off. It also seems to make the EGT's read lower in a lower gear under more load than in a higher gear under less load. Very weird. Now I have to question how accurate some of the other info is! Mind you this gauge is about 2 years old, so it's not a "new" model by any means, if they've been revised at all...
EGT's displayed on the Aeroforce Scangauge were never "accurate" to begin with. Even on a completely factory calibrated PCM, they would be inaccurate, especially if you start doing any other modifications, such as freeing up exhaust flow, head porting, cams, or any sort of electrical tuning device (map clamp, SAFC, E-manage).
There is no actual thermocouple that the Aeroforce scangauge uses to measure EGT temps, simply calculations based off of timing advance, Load deflection(MAP sensor), Throttle position, and AFR's.
Now, add the fact that you have modifications and a "custom" tune in the PCM, which doesn't include a custom EGT calibration for said tune and modifications, and you are going to see some whacked out EGT readings. Best thing to do if you're truly concerned with EGT's is to get an ACTUAL EGT gauge with a K-type thermocouple.
There are several EGT threads here that discuss the EGT parameter in detail. The above response is somewhat inaccurate though. This parameter is a calculation derived by Dodge and transmitted on the OBD2 port. Looking at real data vs this parameter indicates that Dodge did a pretty good job with this calculation. It's typically within 50-75 degrees.
By DSP are you talking about a Diablosport reflash? I would expect internal calcuations to become inaccurate once you start changing fueling parameters and tables. Hp and mpg readings also could be affected, which is why there is a menu option to add a correction factor for both (hp correction).
Also, please don't refer to our product as Scangauge, we don't want to be associated with that inferior product Our Interceptor is a scan gauge but is not called Scangauge or ScanGauge.
I can agree with Todd on this one as I too have been freaked out by some of the readings I've seen, both on their INTERCEPTOR (i'll stop calling it a scangauge now. ) and my ProSport EGT gauge. I've also come to the opinion that the stock and S3 setups run HOT under cruising conditions that aren't involving WOT. 1800* while under "good" part-throttle boost seems to be the norm, and if it is then I have to assume (I hate assuming too) that Momma Mopar designed it that way.
Oh, and that the Interceptor/ECU's EGT values are indeed pretty damn accurate... they just take longer to reach the true value as compared to an actual EGT gauge.
There are several EGT threads here that discuss the EGT parameter in detail. The above response is somewhat inaccurate though. This parameter is a calculation derived by Dodge and transmitted on the OBD2 port. Looking at real data vs this parameter indicates that Dodge did a pretty good job with this calculation. It's typically within 50-75 degrees.
By DSP are you talking about a Diablosport reflash? I would expect internal calcuations to become inaccurate once you start changing fueling parameters and tables. Hp and mpg readings also could be affected, which is why there is a menu option to add a correction factor for both (hp correction).
Also, please don't refer to our product as Scangauge, we don't want to be associated with that inferior product Our Interceptor is a scan gauge but is not called Scangauge or ScanGauge.
Todd
The Todd has spoken
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There are several EGT threads here that discuss the EGT parameter in detail. The above response is somewhat inaccurate though. This parameter is a calculation derived by Dodge and transmitted on the OBD2 port. Looking at real data vs this parameter indicates that Dodge did a pretty good job with this calculation. It's typically within 50-75 degrees.
By DSP are you talking about a Diablosport reflash? I would expect internal calcuations to become inaccurate once you start changing fueling parameters and tables. Hp and mpg readings also could be affected, which is why there is a menu option to add a correction factor for both (hp correction).
Also, please don't refer to our product as Scangauge, we don't want to be associated with that inferior product Our Interceptor is a scan gauge but is not called Scangauge or ScanGauge.
Todd
Sorry, I guess I should have been a little more clear, and omitted the first sentence of my first reply. On a modified car (such modifications as exhaust, turbos, porting, tuning devices such as SAFC/DTEC), while using a factory calibrated PCM would likely not show accurate EGT readouts on the Aeroforce Interceptor. I can only imagine the accuracy would be much less accurate on a SCT/DSP flashed PCM.
On an otherwise completely stock vehicle, I can see where the readouts would be fairly accurate.
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DSP + EGT = glitch?
Something was definitely not right, as I knew the temps were not that high at 2,500-3,000 RPM's. So, I went to a desolate road and did a 4th gear WOT pull and the EGT's were bouncing between 1,640 and 1,670..., so clearly cruising temps are way off. It also seems to make the EGT's read lower in a lower gear under more load than in a higher gear under less load. Very weird. Now I have to question how accurate some of the other info is! Mind you this gauge is about 2 years old, so it's not a "new" model by any means, if they've been revised at all...
Our Interceptor is a scan gauge but is not called Scangauge or ScanGauge.
) and my ProSport EGT gauge. I've also come to the opinion that the stock and S3 setups run HOT under cruising conditions that aren't involving WOT. 1800* while under "good" part-throttle boost seems to be the norm, and if it is then I have to assume (I hate assuming too) that Momma Mopar designed it that way.
Linear Mode
