I am pretty sure the RDX injectors are 410 cc, stock I think is 210 cc

 

sweeeeeet....thanks dude....now back to the summer challenge

 

is this highway only or a mixture of just in general 1 hour of driving?

 

The only explanation I have is that you tow your TL behind an Rv ;D

 

Man, the best I've been getting is around 25. I did almost get 450 miles to the tank when driving from Lubbock to Houston on the freeway. I think that's the best I can do. My girlfriends Audi A3 is getting around 30. So jealous.

 

or....he has rdx injectors as he stated above

 

wow....i iam clueless on the RDX injectors i didnt know people put them in TLs nor do i know why....time to abuse the search engine instead of this thread.....ur welcome

 

more air + more gas = more power

so if you keep putting more air but same amount of gas you are running lean....so upgraded fuel injectors will give you some more fuel and hence more power....

 

That makes sense. So it calculates based on DC and stock flow rates. The DC is around half as much with the large injectors so the ECU thinks you're using half the fuel. Makes sense now.

 

More air and fuel = more power. Remeber, the ratio is constant so you need more air to match the extra fuel. The turbo does a nice job of supplying the additional air so you need injectors that are at least twice as big. On a stock TL, adding these injectors would do nothing for power since you would not have the air to take advantage of the extra fuel. The ECU would just pull the DC down on the injectors and you would be back to where you were with stock injectors.

 

I got >50 once for about 2 miles and then right back to 32.

 

been there done that LOL

 

That's not exactly true. Tuning stand alone ECU's I had settings based on throttle position. Generally that only mattered at high throttle positions once you get out of close loop mode though. Just cruising around, yah all it cares about is how much air its getting, not what the restriction is.

 

If you're talking about a speed density, the restriction posed by the filter at high throttle openings shows up as more vacuum on the MAP sensor and all is fine. If the ECU ignores the MAP and 02 at full throttle it can go rich from a restriction. If PE is triggered by throttle position AND it goes into open loop AND it's a MAF equipped car that pegs the meter, it can go rich.

The TL seems to stay in closed loop all the time from what I've seen.

 

Well, my particular system was MAP on a link ecu. It would enrich based on throttle in open loop, and on throttle application. That's not ignoring the MAP, but purposefully enriching it. Can't say in detail what the TL's ecu does. I wouldn't be shocked to see on throttle enrichment or other small tweaks.

Just saying that sometime throttle position is used on some EFI cars. Its not sensor data that is completely thrown away.

 

I agree. It's used for throttle tip-in enrichment which does the same thing as the accelerator pump does in a carburetor. It momentarily enriches the mixture the second you hit the throttle, before the MAP or MAF can react to the airflow increase/pressure drop to avoid tip-in stumble.

Tip-in is still used but absolute throttle position has very little weight put on it for calculating mixture. It does have a hand in determining the target AF in some cases.

 

I consistantly get 23 mpg average. Pure highway cruise control: 28 or 29 factors depending.

 

I get terrible gas mileage. I filled up and drove 162 miles roundtrip with ac on and closed windows and was down to half a tank.

i know that isnt good..

Jae

 

Have you actually measured it? I recommend a complete fill up (do not top off), drive it until it is 75-80% gone and then fill up again. Do the Math. Repeat process.

 

My MID currently has about 11 and a half hours of driving on it, with an average speed of 35mph and an average of 26mpg. I think I'm doing pretty well with the mileage for having a lower average speed.

 

July 2 when we were driving from the Jacksonville area back home. I reset the MID after we stopped for gas in Walterboro, SC. Took this picture when we stopped for dinner at an Arby's in Emporia, VA, at around 9:00 that night. Cruise control was at 75 for most of the trip, although I was doing around 81 several times when there was enough traffic to allow a faster speed without standing out. Ms1995hoo wanted me to stop for gas at the same time and I refused because I felt we hadn't gone far enough, so we ultimately stopped about 51 miles later off I-295 in Virginia. Car probably could have gone further but we were coming up on a stretch where there were fewer exits and not many gas stations.

 

This is from awhile ago......

 

^^^ that is actually amazing gas mileage for the speed....

unless you did a 1500 mile trip averaging 55mph and 35mpg and in the last 300 odd miles in traffic and hence your mph went down to 47 and mpg to 29...

 

air filter wont change a thing unless its so clogged up that theres not enough air to burn all the fuel, which would mean your filter is near completely blocked off at highway speeds...

 

I am getting 16mpg per the trip computer. Just recently installed a K&N drop in filter since the last one was filthy. I just checked the NAVi and I have a code for P0174 and a P0159 but no check engine light. I am thinking this is due to what I have read being a necessary ecu flash update but it definitely is hurting my mpg..

thoughts?

 

when i did this i was just seeing what it gets in general. I reset it after i did spark plugs and airfilter, then just started driving. So it includes alot of highway, i would say 70-30. But yes amazing mpg....funny thing is my motorcycle gets the same only bc its modded and very fast!

 

Check these out might help.....
http://www.obd-codes.com/p0159
http://repairpal.com/OBD-II-Code-P0171-and-P0174

 

I have been getting consistent 32-33mpg, but I do a lot of back woods road driving, and drive like an old lady

 

is that on the tack or at the pump? When calculated i get 27.4-28.9 actual.... when i had it say 33mpg filled up and was only 29.3ish....

 

Thats from the MID, I know its pretty close though as I did figure out the first few tanks manually, I was getting 23-25mpg, and thats what the MID as telling me. Its hard to keep your foot out of it with a new car lol.

 

1 week of driving for my job. Its about 70-highway/30-city driving.

 

My max would be 34 mpg at a steady 65 mph NJ to SC (I don't have pics of it but have done it on several occasions). RPM's < 2K the whole way. On a regular basis, 27 mpg mixed (70 hwy/30 city) driving and of course, worse in the winter (~ 23 mpg).

 

I dont know anyone who had the stocks measured, but i would bet on them beaing atleast 245cc (thats what most other honda injectors are). They might even be as high as 290's.

 

I've driven from Portland, Oregon to Seaside, Oregon over the coast range (1,600' elevation) with the cruise control set to 57 mph. I didn't have to adjust my speed for the entire highway section of the trip. I pulled into the parking lot of the motel and the display read 30 mpg with an average speed of 54 mph IIRC.

07' Type S

 

I get about 220-255 on a full tank in my 07 S, but its mostly city driving

 

^^^and cold air intake

 

I took a recent trip to Red River, NM from Tulsa, OK and was amazed at the mileage I was seeing. I had never been able to get the 30 MPG highway as our manufacturer suggested. Turns out I was always driving too fast. I tend to drive 80 or so on the highway. This trip I drove 70 on cruise control. The below picture is my reading from Cimmarron, NM to Enid, OK. Again, cruise on 70 (average is lower due to slowing down as passing through small towns or construction) and Mid reset at the gas station...not when already at highway speed. Tires at 40 PSI and car pretty loaded up with camping gear so might have been better with less weight. At the two hour mark I was at 37 MPG!

In Enid OK, prior to filling up with gas for last leg of trip:

Two hour point of trip:

 

i have never been able to get 36+...awesome