RomRaider

Figured I would share my current tune. Use at your own risk...

2002 WRX 2.0L 5 spd
VF43
E85 fuel
Stock boost control system - .043 pill (I think)
TurboXS stealthback - 3" WBR axleback - No cats
Catless Uppipe
255 Walbro
825 cc/min modded stockers
Perrin turbo inlet
Stock TMIC

Tuned to hold 20 psi to redline, .8 lamda
Zero'd Delays
Zero'd Timing Offset
No Rear o2 Sensor
Launch Control Patch set at 5k rpm
E85 tune has been comp'd with injector scaling and MAF scaling

can you explain why your injectors are scaled to 550? I thought it was a 30% decrease from the actual flow rating. How about any changes in tip in enrichment for start up? Sorry about all the question. noob here trying to get ready for e85 myself.

I think I did mess with tip-in, both standard and cold. I also messed with some of the cold running fueling parameters. Check them out against a stock map.

As for the injector scaling, I landed on 550 because modded stock injectors are "bi-polar" in nature. At very short pulse widths, they appear to flow near stock. Once they start opening up the pulse widths, they start acting like 825's. placing them at 550 was a compromise. It made it so I had to do less tuning in the low MAF scaling calibration, but had to do some tuning across the board.

Also, the 16-bit ECU's have a 300 MAF limit. By setting the injectors at 550, it lowers the values in the MAF scaling so this won't become an issue as quickly.

Check out the MAF scaling. Its not stock...

Oh, btw, fueling was dialed in with a wideband...

You also have update the warm-up enrichment map why?

Is it about the E85 or can i use it also for ron98?

Can you explain please?

This rom is for E85 only. The injector scaling and MAF calibration would be off for any pump gas or other fuel.

The cold running changes were for the combustion difficulties of E85. Ethanol doesn't evaporate under ~65dF (I'd have to double check, its somewhere in that area). So you have to put in more fuel under cold conditions to be sure enough gasoline is present for some combustion.

I will probably be taking these cold tables back to stock as I put in stock heat range spark plugs and it cured my cold running issues. I had one step colder plugs in during the development of those map areas.

Removed my incorrect statements...

I was never perfectly happy with the way the injectors were tuned on the above map. I've recently retuned them (modifying all three major parameters, scalar, latency, and maf cal). I will be posting up a new map in a few days...

Strange, have you got a log showing this? While under LC (ie. while LC is activated and you are stationary) is the ECU reporting knock? When I was dialing in my LC I had a little knock in areas of the base timing table that you don't generally drive in, which was easily corrected by removing a little timing - but it didn;t require timing to be pulled across the table and when I use LC now the ECU doesn't pull timing throughout the run - so something seems amiss with your current tune in regards to LC.


Leslie

I didn't log it. Seat of the pants dyno recorded it. It was noticably slower after launching, so I assume the ECU was pulling timing. The motor wasn't knocking, just was slow. I won't put it at the top of my list, but I will go out and log it. It was noticable enough that I didn't bother.

I still have to get out to the strip anyhow and I will log and get time slips with and without.

I've been playing with your timing map on top of my map I built. Your running more timing then me by far but my car seems to like it. I've had 0 knock so far I'm going to pull a LV Later today.

I'm going to toss this map on the dyno along with my map and show the differances. I've been hearing all kinds of reports regarding how much timing the cars can handle.

I'm doing your timing map minus a couple changes on top of my fueling scaling and such. Running my MBC at 23lbs

so far so good

funny you should say that.

i've been hearing all kinds of reports regarding how many people have busted pistons.

I was thinking the same thing when I read that. I suppose that it may just be tuning E85 that he is referring to, at least I hope!

You really shouldn't post as you did without even logging it to know it occurred. Ppl new to tuning will see your comment and expect it is factual, when infact it was merely a "Seat of the pants" observation.


There are many reasons why it could be slower, but without a log to determine exactly, then there is no way of knowning for sure.

As for me, I can definately notice an improvement in speed with the LC patch. Not only does it help with consistant launches, but my largish turbo makes around 8psi on the line before I even take off, which means I am able to make more boost in first then if I didn't use it. This extra boost definately improves my acceleration.

LV is not the be all and end all of letting you know if you have knock. It is a great tool when used with everything else, but used on its own it can give you a false sense that all is ok - but knock may be (and does) occur that LV is not displaying for one reason or another.

Just make sure you log FLKC and FBKC (or knock count if you have it) as well, at a minimum, when tuning timing.

I have a netbook who's sole purpose in life is the live in my glove box. Any time I make any map changes I Data log 3rd and 4th gear pulls. The reason I do 4th is because of my shorter then normal gearing.

That being said. I already made changes to his timing map as my car did not seem to like it in the lower load section then again it could be false knock. Eather way to be safe I adjusted the apporiate cells.