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Old 08-03-2020, 11:28 AM   #1
Justanotherhonda
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Default GTX3584RS How does this log Look?

I have a 2016 EJ25, engine is built with all the common parts for 800whp+ variable being cosworth intake, GSC S2 Cams, and killer B equal length, GTX3584RS Gen II 0.83 AR, tuned on e85. Car runs great, no real complaints on drivability outside of the EGT's seem very high to me for a car running on alcohol and it feels more laggy than it should be even given the the turbo that is on it.

My initial thought is timing, for both concerns but I only have basic knowledge on parameters like that, and don't know what I should be seeing on something this powerful and on Ethanol.

Any input is appreciated

https://datazap.me/u/jimmyrepasi/log...0&data=6-15-24


https://redirect.viglink.com/?format...Fusp%3Dsharing
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Last edited by Justanotherhonda; 08-04-2020 at 12:39 PM.
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Old 08-03-2020, 01:53 PM   #2
alexmartynyuk
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It definitely spools on the later side, did you start the pull in third gear and shift into 4th, i assume so according to the log? It would help if you were able to log your intake and exhuast avcs settings assuming you are still using avcs since that can have a really big affect on spool. As for timing, that can vary but looks to be fine for E85 looks like its running a maximum of about 23ish degrees at 8k. How high are the egts? Also what is your air/fuel ratio in boost?
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Old 08-03-2020, 03:22 PM   #3
Justanotherhonda
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Quote:
Originally Posted by alexmartynyuk View Post
It definitely spools on the later side, did you start the pull in third gear and shift into 4th, i assume so according to the log? It would help if you were able to log your intake and exhuast avcs settings assuming you are still using avcs since that can have a really big affect on spool. As for timing, that can vary but looks to be fine for E85 looks like its running a maximum of about 23ish degrees at 8k. How high are the egts? Also what is your air/fuel ratio in boost?
I started the pull maybe a second before I hit record in 3rd gear, I know its weird as the log starts with WOT.

Ill love the AVCS next time.

The egts are high, the sensor itself is located in the collect of the killer b equal length manifold and when I went to monitor them they would be 1300-1400 while cruising and the first pull reached 1750F then the sensor went open.

A/F seems to be decent for ethanol, I have the Visconti cable so it is logged here as the rear o2, I just don't know how to accurately scale it to Lambda to really understand it
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Old 08-03-2020, 03:41 PM   #4
alexmartynyuk
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Quote:
Originally Posted by Justanotherhonda View Post
I started the pull maybe a second before I hit record in 3rd gear, I know its weird as the log starts with WOT.

Ill love the AVCS next time.

The egts are high, the sensor itself is located in the collect of the killer b equal length manifold and when I went to monitor them they would be 1300-1400 while cruising and the first pull reached 1750F then the sensor went open.

A/F seems to be decent for ethanol, I have the Visconti cable so it is logged here as the rear o2, I just don't know how to accurately scale it to Lambda to really understand it
Hmm yeah egt is definitely hot, I personally havenít ran e85 as of yet but I have done a lot of research on it and have seen a lot of logs with people running e85. Most people donít bother with EGT gauges but the people that run them in big hp setups reported more like 1400*F during the top of a pull. And people report lower EGTs when going to e85, but none of those were as high HP as yours is from what I recall. Still I would think the egts would be cooler, especially during cruising.
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Old 08-04-2020, 12:36 PM   #5
Justanotherhonda
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I agree, and all of what you said is inline with the research I have done. I will try to get a log with the AVCS monitors on so we can see what they are doing during all of this.

Any thoughts how to interpret that rear o2 monitor as air/fuel?

Using this chart my logs look to be very close to where it should be



Quote:
Originally Posted by alexmartynyuk View Post
Hmm yeah egt is definitely hot, I personally haven’t ran e85 as of yet but I have done a lot of research on it and have seen a lot of logs with people running e85. Most people don’t bother with EGT gauges but the people that run them in big hp setups reported more like 1400*F during the top of a pull. And people report lower EGTs when going to e85, but none of those were as high HP as yours is from what I recall. Still I would think the egts would be cooler, especially during cruising.

Last edited by Justanotherhonda; 08-04-2020 at 12:54 PM.
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Old 08-04-2020, 02:50 PM   #6
alexmartynyuk
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Do you have a gauge inside the cabin for a wideband? Looking at your voltage values for the rear o2, using that chart it puts your afr at about mid 13s gasoline afr. If thatís correct then itís running too lean, most tuners who tune e85 will target high 11s in gasoline afr, some tune for low 11s.
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Old 08-04-2020, 07:59 PM   #7
Justanotherhonda
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Here are two logs from today with the monitors for the avcs turned on


https://datazap.me/u/jimmyrepasi/log...g=0&data=11-29


https://datazap.me/u/jimmyrepasi/log...g=1&data=11-29
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Old 08-04-2020, 10:46 PM   #8
alexmartynyuk
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Quote:
Originally Posted by Justanotherhonda View Post
Here are two logs from today with the monitors for the avcs turned on


https://datazap.me/u/jimmyrepasi/log...g=0&data=11-29


https://datazap.me/u/jimmyrepasi/log...g=1&data=11-29
Intake and exhaust settings seem decent, you may not be able to run more aggressive settings due to piston to valve interference but canít say for sure without claying the pistons and checking for interference. Basically the only thing in question is what afr itís actually running, looking at the chart you provided and the afr seems too lean. Get another wideband in the downpipe, AEM UEGOs arenít that expensive.
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Old 08-05-2020, 09:06 AM   #9
Justanotherhonda
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Thanks for all the input. Looking at the chart it and comparing to the voltages ive logged it looks like the Air/fuel ratio is just about 8.4:1 for e75-ish it seems to be right about where it should be, no?


Quote:
Originally Posted by alexmartynyuk View Post
Intake and exhaust settings seem decent, you may not be able to run more aggressive settings due to piston to valve interference but canít say for sure without claying the pistons and checking for interference. Basically the only thing in question is what afr itís actually running, looking at the chart you provided and the afr seems too lean. Get another wideband in the downpipe, AEM UEGOs arenít that expensive.
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Old 08-05-2020, 01:10 PM   #10
alexmartynyuk
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Too lean, it should be closer to 7.3 ethanol afr
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