Times coming down, still knocking.

[5150DSM]

Well I finally got my AWD, turbo DSM into the 14's, I ran a 14.9 @ 91 on Saturday Unfortunately, the general concensus, including my own opinion, says the car should run 12's with a decent driver. I can't seem to get rid of the knock in 3rd gear and now with all the fuel I have added, my IJDC on the 550's is over 100%(106% to be exact) My car is a testament to the importance of good tuning(apparently I'm incapable) all of the correct supporting mods are in place but the times don't match the potential of the set-up. Oh well, I'll keep running and logging and tweaking and tuning until the car runs like it should.

 

[ohio98eclipse]

yeah with racegas id say 12's at 22psi or so ..im lookin at your mods and id ont see a bigger turbo so if your runnin the 14b u gotta turn it up up and away hehe

 

[CanadianTSi]

If your still on the 14b why not put the 450's back in and let the car do the tuning...You should be able to hit 13's pretty easily that way.

 

[talonawd94tsi]

check your base timing

my car was pulling killer knock then i checked my base timing it was a little off

now the car pull really good even at stock boost on a 14b

it has a alot smoother power abnd too

 

[5150DSM]

Thanks for the replies... I sold my 450's to another DSM'r shortly after I installed the 550's. My base timing, along with all the other maitenence and upkeep are good on my car, I spent a couple thousand dollars preforming maitenence before I ever started modifying the car. My only concern upkeep-wise is this exhaust leak that I can't find, it's somewhere in the turbo-back portion of the system but the location eludes me at this point. My SAFC settings are +10% to +15% across the board but I still get knock, I will try to add more fuel up top next time I am logging and see where that gets me. Right now the knock only starts to come on in the upper part of 3rd gear(getting up to 18 counts from 5500-7000, 10-12* timing advance)I am not creeping and I got rid of the 20 psi spike, so I am holding steady at 14psi all the way through the RPM band. I am only trapping 89-91mph though and I can feel the lack of power at the top, I should be able to hit 100+ mph passes but the timing cut keeps me struggling. Oh well, more fuel, more tuning, more practice, I hope to hit my goals sometime this year.

 

[CanadianTSi]

I seriously dount you need that much fuel... Are you sure you're not running really rich??
Maybe you've got bad phantom knock?

 

[5150DSM]

I seriously dount you need that much fuel... Are you sure you're not running really rich??
Maybe you've got bad phantom knock?

I'm with you man, I have a hard time believing that my car needs that much fuel. However, my fuel trims are all showing lean(especially LFT-139%) and the car responds well to more fuel. I got my knock down from 30+ counts to 15-18 by adding fuel and the car definately "feels" better. Phantom knock could be a plausible explanation but I did just run a couple of bottles of Lucas Oil Treatment through the system to try and eliminate that possibility, unfortunately, I don't have access to race gas to test that theory. I guess I could get some 100 octane and mix toluene to bring it up a few points but that seems kinda half assed.