Log results - lots of knock! Eeeek!

[andymoraitis]

That looks much better Neal and I'm glad the new tune is working for you. I would try Jeff's recommendation about lowering base pressure a bit to see if the fuel trims come back in line, but other than that. I think you're on the road to much happier days.

That custom setup is pretty nifty isn't it?

I just wanted to clue you in as to why you're not seeing the timing cap take effect. As an example, the high load timing maps in a chip are made to activate above 2.1 g/rev and you're likely not there yet with only 17 psi of boost. If you turned the boost up to say 20-21 you'd get onto that high map and you should see your timing peak at 18. It will likely knock less as well.

Edit: I just noticed these are 2nd gear pulls. Try them in 3rd as airflow should be considerably higher.

 

[Gromit]

That looks much better Neal and I'm glad the new tune is working for you. I would try Jeff's recommendation about lowering base pressure a bit to see if the fuel trims come back in line, but other than that. I think you're on the road to much happier days.

That custom setup is pretty nifty isn't it?

I just wanted to clue you in as to why you're not seeing the timing cap take effect. As an example, the high load timing maps in a chip are made to activate above 2.1 g/rev and you're likely not there yet with only 17 psi of boost. If you turned the boost up to say 20-21 you'd get onto that high map and you should see your timing peak at 18. It will likely knock less as well.

Edit: I just noticed these are 2nd gear pulls. Try them in 3rd as airflow should be considerably higher.

Hey Andy,

Yeah, this custom set-up is the shiznit. I will lower the base fuel pressure a bit & see what happens with the FTRL. My concern there was that everything else was in line & lowering the base would effect everything across the board. But I'll try it & see what the result is. My other thought was whether or not Jeff could adjust the flow rate/deadtime for just the idle setting. If lowering the base fuel pressure doesn't help I'll talk to him further about it.

In any case, I agree that this is definitely the right direction & by Spring I should be right where I want to be. Thanks for the info on the timing cap - I did read some stuff about that in another thread & on Jeff's board, so I wasn't concerned there. I went with the 2nd gear pulls right now because I usually do 3rd gear pulls very early in the AM on the weekends - there's a nice on-ramp that works well for this - but it's too freakin' cold at oh-dark-thirty these days.

At least I know what direction I'm moving in & can now tweak things a bit to get my desired results.

 

[andymoraitis]

I think he should be able to lean out the idle trims properly, but what you can do in the meantime is unhook the 2G MAS, turn it updside down and back out the adjustment screw on the bottom so that it sits flush. While people back out the screw for more airflow, I've talked to Jeff about it and all it does is lean out the idle. I would do that before burning another chip so that you don't affect your A/F up top. Here's a reference article from RRE:

http://www.roadraceengineering.com/eclipsetech/2gmasadjustment.htm

I'd definitely leave the honeycombs alone since you're nowhere near overrun though. I run 46 lbs/min and I haven't hit overrun yet although I'm probably pretty close.

Let me know how that works out for you and congrats on getting a handle on this thing.

Completely off topic: Good Lord that's a pretty car!

 

[Gromit]

I think he should be able to lean out the idle trims properly, but what you can do in the meantime is unhook the 2G MAS, turn it updside down and back out the adjustment screw on the bottom so that it sits flush. While people back out the screw for more airflow, I've talked to Jeff about it and all it does is lean out the idle. I would do that before burning another chip so that you don't affect your A/F up top. Here's a reference article from RRE:

http://www.roadraceengineering.com/eclipsetech/2gmasadjustment.htm

I'd definitely leave the honeycombs alone since you're nowhere near overrun though. I run 46 lbs/min and I haven't hit overrun yet although I'm probably pretty close.

Let me know how that works out for you and congrats on getting a handle on this thing.

Completely off topic: Good Lord that's a pretty car!

Obviously you were too busy drooling over my car to actually notice that it's a 3G MAF, not a 2G MAF - ain't got no adjustment screw that I'm aware of, just a gaping, unrestricted airflow hole. However, in deferrence to your Wisemanesqueness, I'll double check & see if it has a similar screw I could adjust.

Yeah, I think it's a real purty car, too. It's my favorite color of all the 1G's. Still got glossy factory paint, although it has its share of little nicks & scratches. Once we're done with the modding we'll have it re-painted to the same factory color. Interior is near mint, too. Guess I got pretty lucky with both the wife & her car!

 

[andymoraitis]

Ah, my bad. I'd see if Jeff can tweak the chip then.

Sorry!

 

[spyderturbo007]

I'm glad to see that between a bunch of us we were able to get eveything straightened out for you Neal.

Now, if the ECU fairy would only leave an EPROM under my pillow one day I wouldn't have to deal with the SAFC's sky high timing.

 

[kraka]

Wow...Glad it all worked out for you....

I also fixed a lot of my problems with the help of tuners guys and switching parts....Im on an evoIII setup now, I think I was still on a 14b at the time of this thread....

<-- I was having horrible misfiring issues (still do kinda) but with the help of a 2g maf, custom eprom and safc tuning I have a pretty steady a/f.....I found I was running way too lean by just running off my chip tho, I had to add a considerable amount of fuel....

Also, my chip is set to pretty agressive timing up top, probably 22* or so....If I could get my logger to work now with out cutting out at 5000rpm (logger activates studderbox in all gears haha) then I would be able to work out the rest of my tuning kinks.....Wideband does a lot, but nothing can really beat a logger....

Good luck with the rest of your issues
-Josh

 

[Gromit]

Wow...Glad it all worked out for you....

I also fixed a lot of my problems with the help of tuners guys and switching parts....Im on an evoIII setup now, I think I was still on a 14b at the time of this thread....

<-- I was having horrible misfiring issues (still do kinda) but with the help of a 2g maf, custom eprom and safc tuning I have a pretty steady a/f.....I found I was running way too lean by just running off my chip tho, I had to add a considerable amount of fuel....

Also, my chip is set to pretty agressive timing up top, probably 22* or so....If I could get my logger to work now with out cutting out at 5000rpm (logger activates studderbox in all gears haha) then I would be able to work out the rest of my tuning kinks.....Wideband does a lot, but nothing can really beat a logger....

Good luck with the rest of your issues
-Josh

Josh,

Yeah, DSM Diagnosis by Committee seems to work pretty well. Most of what I've got left to do now is minor tweaking so I'm pleased with where I've gotten to. As you've seen, too, the chip is not a total cure for all issues, but it's a major big step in the right direction. I searched a lot of old threads in the last couple months & found a lot of people running similar set-ups with similar problems, but more often than not the thread died with no solution posted. Eventually, I came to the conclusion that 550's are really not enough for an EVO III 16G - at least not combined with a SAFC on a 1G. Mathematically a SAFC can handle injectors up to 660, but with the 1G's already aggressive timing this just makes a huge mess of everything.

Anyway, good luck to you, too, with fixing your issues - I'm sure stutterbox activation in all gears must be an interesting experience!

 

[NOMIEZVR4]

Im surprised you never tried any race gas on your old setup although it was brought up a few times.

I just found out that my near stock car also has a knock problem at 5500+rpms in 3rd gear..Ill keep you guys updated on that one...

Nomie

 

[Gromit]

Im surprised you never tried any race gas on your old setup although it was brought up a few times.

I just found out that my near stock car also has a knock problem at 5500+rpms in 3rd gear..Ill keep you guys updated on that one...

Nomie

Yeah, it was suggested a couple times to try race gas as a means to determine if what I had was phantom knock. But I already had pretty good indications that it wasn't & that the knock was occurring in exactly the same situation each time & never under partial throttle. Since I have no plans to run race gas on a regular basis, just using it to bring down my knock would serve no purpose. Instead, once I started talking to Andy & Jeff about the custom chip & the limitations of the stock maps for a 1G at higher boost, I knew this was the way to go.

 

[NOMIEZVR4]

I had similar problems with my old car that I had success with. After fixing all of my boost leaks, installing a new knock sensor, and adding a walbro 190, I finally found out with a second set of eyes why my car was knocking. Although my 14b was ported, the car would still creep at 5500rpms in 3rd gear on 93 octane from 14lbs of boost to 17lbs. There was nothing wrong with my car at all, its just that the boost was creeping, causing me to knock on pump gas.

I havent had time lately, but Im really curious to know why my new car is knocking. Its going to be fun figuring out why..
Unlike you, I dont have the $$ to upgrade..so this knock WILL be fixed on stock injectors and 1g mas..


great thead by the way...lots of useful information!

Nomie

 

[kraka]

Ya....My phantom knock was solved with a thicker oil additive and of course, my phantom knock elimination of the eprom chip....

5000rpm rev limit in every gear sure is an 'experience'....I still got lots of issues to deal with, but so far Ive made good progress I hope

 

[DJ23GSX]

I found a suspect to my issues as well. I pulled my ecu and found a leaky cap. I am hoping by fixing that i can clear up atleast a few issues i am having.