Has anyone figured out how to set fuel and/or timing so it could backfire or pop at the two step, to build more boost off the line? Suggestions are appreciated.

 

my suggestion is switch to ecutek.. ecuflash is garbage

 

Although I don't have an answer for this, post above is totally worthless and misinformed.

 

Especially since the ECUtek still uses the factory ECU.

Coming to terms with the question, I tried this earlier this year (I mean earlier last season-edit) and while I was able to build more boost off the 2 step it almost always lead to a bad bog on the launch. If you are after more boost at the same RPM, the stock ECU by itself doesnt seem to be able.

 

 

My suggestion to you would be to keep thinking that . Want to race that 4 door ****box of yours?

 

When I did this, I logged the 2 step to begin with to see what the variance in timing was. Stock the 2 step starts at about (varies) the 120-160 load%, though I narrowed it down to basically the 140. This makes sense as everything else being equal you would be at approximately .4 bar boost. Yes I know thats not how it works in real life, but it worked well enough with this test. Anyway, The timing variance at 5500 was about 20*.

I made some alterations that looked something like this:



I relogged the tune and saw that in fact I had increased the timing minimum to -12*. This worked great at building boost. I thought I was all set as I could build 14psi at 5500 like a champ. Then came the trip to the track. After consistent 2.02 60' times with MAJOR bogging after coming off the 2 step I went back to a stock map and ran a 1.70x no problem. I am not saying it cant be made to work, I just didnt get good results from it. In fact the next time I went to the track, I had better air and left like normal (albeit with a higher launch limit) and as soon as the engine loaded up on the launch I was getting full boost. So much and so fast I couldnt maintain traction off the line in fact.

 

My suggestion is you shut the **** up since you're obviously a troll.

 

I tried something similar with poor results as well.

 

I am new to this but tried to tune in more boost @ launch yesterday just messing around and had absolutely ZERO success...I think you have to tune the entire range to have any sort of success because if you surge/drop out of the tuned range you just bog and nothing good comes of it. I don't know if that's right or not but just my guess as to why I and maybe others are having issues.

 

The popping is from guys running a 6k 2-step with no cat. I run a cat and a 5.9k step, and I dont get that popping. I think it has everything to do with running a test pipe and free flowing exhaust though, since I didnt pop at 6k either. I like my 1.7 60s, so Im not complaining.

 

I run a test pipe but havent been throwing fireballs. I also was launching at 6375 last season, it'll be a little lower this year because of more power.

 

Well the popping that i hear is from having power building boost or no boost the car will run fast my mid 11's came without a two step but i personally like the two step now.