Is RSX wideband O2 capable for E85 supercharged? - Club RSX Message Board
Go Back   Club RSX Message Board > PERFORMANCE BASICS RSX > ECU Tuning RSX
Use the same user name on Club RSX, Club EP3, and Club ILX!

Reply
 
Thread Tools
Old 01-19-2019, 08:39 PM   #1
davidc
New Member
 
Join Date: Jan 2019
Posts: 1
iTrader: (0)
davidc is a jewel in the rough of c-rsx davidc is a jewel in the rough of c-rsx davidc is a jewel in the rough of c-rsx davidc is a jewel in the rough of c-rsx davidc is a jewel in the rough of c-rsx davidc is a jewel in the rough of c-rsx davidc is a jewel in the rough of c-rsx davidc is a jewel in the rough of c-rsx
Is RSX wideband O2 capable for E85 supercharged?

Searched, but couldn't find the answer..

I'd like to know if the stock '04 RSX TypeS psuedo wideband 02 sensor is suitable for tuning a supercharged engine running E85? It was recommended to use the stock sensor since it is wideband and the ECU is a PRB K-series one, so...sort of plug and play.

The ECU is a Doctronic, basically same as KPro.

I ask because I've read that AFR's for E85 should be down in the 9.5 range, and perhaps even a little richer if supercharged.

I've also read that the stock 02 sensor for the 04 RSX, while called wideband, only reads down to about 11.7.

Yet, I was told that it should be suitable.

What do you experienced guys think?
davidc is offline   Reply With Quote
Old 01-20-2019, 03:55 PM   #2
nats007
Always on TDY...
 
nats007's Avatar
 
Join Date: Mar 2008
Location: Central FL
Posts: 2,136
iTrader: (6)
nats007 is on a distinguished road nats007 is on a distinguished road
Garage
Quote:
Originally Posted by davidc View Post
Searched, but couldn't find the answer..

I'd like to know if the stock '04 RSX TypeS psuedo wideband 02 sensor is suitable for tuning a supercharged engine running E85? It was recommended to use the stock sensor since it is wideband and the ECU is a PRB K-series one, so...sort of plug and play.

The ECU is a Doctronic, basically same as KPro.

I ask because I've read that AFR's for E85 should be down in the 9.5 range, and perhaps even a little richer if supercharged.

I've also read that the stock 02 sensor for the 04 RSX, while called wideband, only reads down to about 11.7.

Yet, I was told that it should be suitable.

What do you experienced guys think?
For the stock O2, you can use it for tuning; however, an aftermarket wideband is preferred as the stock O2 can't read below 11 if I remember. So, I'm tuned to 11.5 for WOT and my stock O2 sensor was fine.

If you are running richer, you need an aftermarket wideband... I don't recall anyone recommending to run at 9.5... I think that is too rich. If you have e85, that allows you to advance timing quite a bit.
__________________
2002 NHBP RSX-S | K-Pro v3 | 2006 K24a2 | JRSC (K24a2 CP + 3" BP) | MercRacing Inlet
FIC 775cc | AEM W/M (1000cc/min) | 3" Custom SRI | OBX v1 RH | 2.5" Custom Catback
nats007's DC5 progression
nats007 is offline   Reply With Quote
Old 01-20-2019, 05:45 PM   #3
DC5Sandbag
Past Driverís Ed
 
DC5Sandbag's Avatar
 
Join Date: Jul 2016
Posts: 488
iTrader: (0)
DC5Sandbag might be well recognized one day on c-rsx DC5Sandbag might be well recognized one day on c-rsx DC5Sandbag might be well recognized one day on c-rsx DC5Sandbag might be well recognized one day on c-rsx DC5Sandbag might be well recognized one day on c-rsx DC5Sandbag might be well recognized one day on c-rsx DC5Sandbag might be well recognized one day on c-rsx DC5Sandbag might be well recognized one day on c-rsx
Garage
Quote:
Originally Posted by davidc View Post
Searched, but couldn't find the answer..

I'd like to know if the stock '04 RSX TypeS psuedo wideband 02 sensor is suitable for tuning a supercharged engine running E85? It was recommended to use the stock sensor since it is wideband and the ECU is a PRB K-series one, so...sort of plug and play.

The ECU is a Doctronic, basically same as KPro.

I ask because I've read that AFR's for E85 should be down in the 9.5 range, and perhaps even a little richer if supercharged.

I've also read that the stock 02 sensor for the 04 RSX, while called wideband, only reads down to about 11.7.

Yet, I was told that it should be suitable.

What do you experienced guys think?
I have a O2 RSX-S that is set up with an aftercooled supercharger pushing 10.7 psi. I run primarily E85 fuel. Engine is controlled by Hondata Kpro 4, with a AEM digital wideband O2 AFR UEGO gauge, air/fuel ratio controller, & sensor (part #30-4110) wired directly to the ECU as the primary O2 sensor. The tuners that I have experience with would not even touch my car unless I had a more accurate reading O2 sensor.

Last edited by DC5Sandbag; 01-20-2019 at 07:29 PM..
DC5Sandbag is offline   Reply With Quote
Old 03-07-2019, 02:01 PM   #4
all<dc5
NA Today
 
all<dc5's Avatar
 
Join Date: Sep 2010
Location: Miami, Fl
Posts: 1,505
iTrader: (4)
all<dc5 might be well recognized one day on c-rsx all<dc5 might be well recognized one day on c-rsx all<dc5 might be well recognized one day on c-rsx all<dc5 might be well recognized one day on c-rsx all<dc5 might be well recognized one day on c-rsx all<dc5 might be well recognized one day on c-rsx all<dc5 might be well recognized one day on c-rsx all<dc5 might be well recognized one day on c-rsx
Quote:
Originally Posted by nats007 View Post
For the stock O2, you can use it for tuning; however, an aftermarket wideband is preferred as the stock O2 can't read below 11 if I remember. So, I'm tuned to 11.5 for WOT and my stock O2 sensor was fine.

If you are running richer, you need an aftermarket wideband... I don't recall anyone recommending to run at 9.5... I think that is too rich. If you have e85, that allows you to advance timing quite a bit.
I've been reading that most O2 sensors are calibrated to operate based on lambda and then, assuming lambda of 1.0 = 14.7:1 AFR (gasoline engines), giving a display of this calculated "AFR"

So even though e85 stoich AFR is actually 9.8:1, when running at this AFR with e85 the O2 sensor will display an AFR of 14.7:1 because it's reading a lambda of 1.0 and calculating the AFR as if the fuel were gasoline.

https://e85vehicles.com/e85/index.ph...-wot-e85-afrs/

I'm wondering if this is how our O2 sensors work though...
__________________
Show off thread:
http://forums.clubrsx.com/showthread...945&highlight=
'03 RSX-S I/H/E/Kpro
'03 Tacoma PreRunner V6 ExtraCab
all<dc5 is offline   Reply With Quote
Old 03-07-2019, 06:51 PM   #5
nats007
Always on TDY...
 
nats007's Avatar
 
Join Date: Mar 2008
Location: Central FL
Posts: 2,136
iTrader: (6)
nats007 is on a distinguished road nats007 is on a distinguished road
Garage
Quote:
Originally Posted by all<dc5 View Post
Quote:
Originally Posted by nats007 View Post
For the stock O2, you can use it for tuning; however, an aftermarket wideband is preferred as the stock O2 can't read below 11 if I remember. So, I'm tuned to 11.5 for WOT and my stock O2 sensor was fine.

If you are running richer, you need an aftermarket wideband... I don't recall anyone recommending to run at 9.5... I think that is too rich. If you have e85, that allows you to advance timing quite a bit.
I've been reading that most O2 sensors are calibrated to operate based on lambda and then, assuming lambda of 1.0 = 14.7:1 AFR (gasoline engines), giving a display of this calculated "AFR"

So even though e85 stoich AFR is actually 9.8:1, when running at this AFR with e85 the O2 sensor will display an AFR of 14.7:1 because it's reading a lambda of 1.0 and calculating the AFR as if the fuel were gasoline.

https://e85vehicles.com/e85/index.ph...-wot-e85-afrs/

I'm wondering if this is how our O2 sensors work though...
I'm actually not running E85, just regular premium 93 gasoline. I thought you can set those values in kpro settings if you are running E85 and adjust the lambda values accordingly.

I do have methanol injection to assist with intake temps. The boost in octane while spraying does allow me to advance timing a bit (gradually) using the nitrous tabs. With it, I advance timing about 6* and cut -1200 of fuel at redline to keep AFR at 11.5 during WOT.
__________________
2002 NHBP RSX-S | K-Pro v3 | 2006 K24a2 | JRSC (K24a2 CP + 3" BP) | MercRacing Inlet
FIC 775cc | AEM W/M (1000cc/min) | 3" Custom SRI | OBX v1 RH | 2.5" Custom Catback
nats007's DC5 progression
nats007 is offline   Reply With Quote
Reply

Bookmarks

Tags
capable , e85 , rsx , supercharged , wideband

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:02 AM.


Privacy Policy  |  Disclaimer Notice
Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright © 2001-2012, Club RSX, Inc. All rights reserved worldwide.
This website is owned and operated by Club RSX, Inc.
Club RSX, Club EP3, and Club ILX are not affiliated with American Honda Motor Co., Inc.