muppetman342
Having too much fun
- Joined
- Dec 1, 2012
- Location
- Charlottesville, VA
First off, the set up: B230F+T, 16T, 30lb/hr injectors, TLAO chips, Buchka spark, ipd turbo cam, stock IC, regular MAF, AEM WBO2, was running NGK BPR7ES but went to BR7ES to try and help this problem, 3" exhaust up to the under axle where it becomes 2 1/4" through a muffler and out. Also just recently went to an efan because the clutch fan was giving me problems with the shroud and whatnot. 93 octane.
I had been running 10-11 psi for awhile and I wisely decided to up the boost during the summer. First adjustment got me up to 14 psi and I noticed a couple clicks of detonation when getting up there in the boost so I let off (like ya do).
I got the MBC set back down to 11, but I guess it is slightly higher than it used to be because I don't recall having detonation problems before. Perhaps I was just ignorant of them until I really started listening again as I was doing this tuning?
So here's the part I'd love some thoughts on: if I work the boost up to 11 gradually, no problem, AFRS are at 10.8 at 11 psi and there's no detonation. If I hop on the gas suddenly it'll do one of two things;
1) It'll boost up and the AFRs will fall with the boost and there's no problem
2) It'll boost up and AFRs don't quite move fast enough and I'll get a couple clicks at 11 psi with the AFR being low 12's, then the AFRs will get where they need to be and there's no more problem at 11 psi sustained.
In the Winter when I first put the 16T on I actually did have the boost set to about 13-14 but I do understand that it was colder then and those numbers may just not be feasible for me during the summer in Virginia.
A lot of the reading that I've done seems to suggest "chips & injectors" I've got the chips, and the fact that I do eventually reach proper AFRs makes me think I'm not running out of injectors, but maybe I'm right on the edge and that somehow effects their response? I don't know.
Another issue is my crap idle, not sure if it's related. But I've done boost-leak tests, replaced ignition components, and verified sensors in search of the idle issue but to no avail, so maybe I have a lazy injector or something.
I had been running 10-11 psi for awhile and I wisely decided to up the boost during the summer. First adjustment got me up to 14 psi and I noticed a couple clicks of detonation when getting up there in the boost so I let off (like ya do).
I got the MBC set back down to 11, but I guess it is slightly higher than it used to be because I don't recall having detonation problems before. Perhaps I was just ignorant of them until I really started listening again as I was doing this tuning?
So here's the part I'd love some thoughts on: if I work the boost up to 11 gradually, no problem, AFRS are at 10.8 at 11 psi and there's no detonation. If I hop on the gas suddenly it'll do one of two things;
1) It'll boost up and the AFRs will fall with the boost and there's no problem
2) It'll boost up and AFRs don't quite move fast enough and I'll get a couple clicks at 11 psi with the AFR being low 12's, then the AFRs will get where they need to be and there's no more problem at 11 psi sustained.
In the Winter when I first put the 16T on I actually did have the boost set to about 13-14 but I do understand that it was colder then and those numbers may just not be feasible for me during the summer in Virginia.
A lot of the reading that I've done seems to suggest "chips & injectors" I've got the chips, and the fact that I do eventually reach proper AFRs makes me think I'm not running out of injectors, but maybe I'm right on the edge and that somehow effects their response? I don't know.
Another issue is my crap idle, not sure if it's related. But I've done boost-leak tests, replaced ignition components, and verified sensors in search of the idle issue but to no avail, so maybe I have a lazy injector or something.