Go Back   EcoModder Forum > EcoModding > Off-Topic Tech
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-18-2008, 03:40 AM   #11 (permalink)
Depends on the Day
 
RH77's Avatar
 
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 41 Times in 35 Posts
Quote:
Originally Posted by Christ View Post
Stop Stop Stop STOP.
I too am a huge SeaFoam fan. Every car I touch gets the vacuum suction treatment, etc -- usually twice a year. The replacement plugs are cooler and gapped to spec. I also have a PCV catch setup. So far, it's performing well at 140K miles.

As far as Intake Air goes, FE is optimal at 100-110F. Under high loads lately, the pinging is very noticeable -- so I filled to a mid-grade mix. The airflow is slower after the warm-air tube to the airbox. This was added later (when the Weather turned colder). I just changed the oil and trans fluid (synth ATF), so that should help. The pinging started after a dead battery cleared the ECU's memory. I may need to "re-train" the ignition system with the ECU bypass method.

I'll have some time to test it this week. It's getting a bit warmer before the next cold snap. Time will tell...

RH77

__________________
“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

_
_
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-18-2008, 03:48 AM   #12 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Quote:
Originally Posted by RH77 View Post
I too am a huge SeaFoam fan. Every car I touch gets the vacuum suction treatment, etc -- usually twice a year. The replacement plugs are cooler and gapped to spec. I also have a PCV catch setup. So far, it's performing well at 140K miles.

As far as Intake Air goes, FE is optimal at 100-110F. Under high loads lately, the pinging is very noticeable -- so I filled to a mid-grade mix. The airflow is slower after the warm-air tube to the airbox. This was added later (when the Weather turned colder). I just changed the oil and trans fluid (synth ATF), so that should help. The pinging started after a dead battery cleared the ECU's memory. I may need to "re-train" the ignition system with the ECU bypass method. I'll have some time to test it this week. It's getting a bit warmer before the next cold snap. Time will tell...

RH77
Jeez... leave out the important stuff...

Drive for an oil change with OE timing settings, then re-adjust it back to what you have it at now... What's happening (for reference) is that the ECU is assuming the timing is at a factory setting, and it's trying to over-compensate, thus the pinging. Your timing is now further advanced than you think it is, after the electronic advance takes place.

Once you've done about 1k miles, you can slowly adjust the timing in 1-2* increments until you're max advanced... adjust each 1000 or so miles. This will manually train the ECU to under-correct the spark curves, allowing your timing to be run as optimal for your RPM range, instead of a broader RPM range.


I'm not positive, but if your car is anything like my Honda, I can just insert a jumper into a specific connector under my hood, and stop the electronic advance from taking place... this is how the service tech sets the initial timing, and how you reset it to whatever you want... on my car.

ECM's aren't stupid.. but they're better at being stupid than humans are.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 11-18-2008, 10:09 PM   #13 (permalink)
EcoModding Apprentice
 
Join Date: Dec 2007
Location: Ventura, Ca
Posts: 112

Whoop's Wheels - '89 Honda Civic Wagovan
90 day: 39.09 mpg (US)
Thanks: 1
Thanked 9 Times in 7 Posts
RH77: I had the timing on my 89 Honda advanced. However, what I noticed was starting about mid September the pinging went up dramatically. I know that here in California they adjust the fuel blend for smog reasons and the consequence on my car is that I had to back off the timing. You could go to a higher octane rating, but my expectation is that the mileage gain will be lost if you look at the costs.
  Reply With Quote
Old 11-18-2008, 10:12 PM   #14 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Forgot about that... EPA reg suggests fuel blending in at least the winter months... perhaps you should try changing gas stations? Maybe get something that doesn't use ethanol, or uses very little of it.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 11-19-2008, 02:17 AM   #15 (permalink)
Depends on the Day
 
RH77's Avatar
 
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 41 Times in 35 Posts
Quote:
Originally Posted by Christ View Post
Forgot about that... EPA reg suggests fuel blending in at least the winter months... perhaps you should try changing gas stations? Maybe get something that doesn't use ethanol, or uses very little of it.
It's E10 everywhere here now instead of MTBE for Winter (mandated). But change stations [gasp] never! My QuikTrip station around the corner and Pump 13 have been there for me since I started hypermiling (and is one of the cheapest places in the Metro) Mostly for consistency in filling, but it's also a Tier-1 fuel.

I'll be headed to a work visit in town, then to the airport for a trip to DC, so we'll see what the SGII comes up with tomorrow evening.

Odd though, Ethanol has a higher octane rating, so it shouldn't ping -- in theory...

-Rick
__________________
“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

_
_
  Reply With Quote
Old 01-19-2009, 05:25 AM   #16 (permalink)
Master EcoModder
 
roflwaffle's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 1,490

Camryaro - '92 Toyota Camry LE V6
90 day: 31.12 mpg (US)

Red - '00 Honda Insight

Prius - '05 Toyota Prius

3 - '18 Tesla Model 3
90 day: 152.47 mpg (US)
Thanks: 349
Thanked 120 Times in 79 Posts
FWIW, based on what I've read it seems that advanced timing is only needed if the ratio of gearing/displacement given some power output isn't optimal. The lower the air&fuel to cylinder volume ratio, which corresponds to lower torque, the farther apart in the cylinder pockets of air/fuel can be, and the sooner ignition needs to start to get all the air/fuel burning up around TDC. W/ pockets that may be farther away, retarded ignition may not result in everything igniting until after TDC. W/ proper gearing and greater torque, the mixture is more or less homogeneous, and in this case even/consistent ignition of the whole mass in the cylinder is much more likely.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Metro Thrashing metroschultz EcoModding Central 71 01-10-2009 12:57 PM
Timing a 93 civic dx... civicrick DIY / How-to 1 10-21-2008 06:51 PM
newb Q'n. Lean burn + advanced timing ... how far to go? b1gmoose General Efficiency Discussion 8 09-17-2008 09:38 PM
Good take on things (long) Daox General Efficiency Discussion 8 08-30-2008 05:11 PM
Accord Timing Belt Who Off-Topic Tech 9 02-29-2008 12:39 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com