Tigris

So what happens before your car actually hits boost? Like while the turbo is spooling, is it ok to run with the timing retarded like that?

thermal

aids333, I had the same problem in the beginning. You need to *** with the AFC some. I started out -40% all across. My idle was erratic. I adjusted it to -38% on the low side. This is my set-up, D16Y8 @ 8psi, DSM 450cc (honda resistor box), no timing retard, stock pump, stock FPR with VTEC set at 5500 RPM:
-1000-4000 RPM= -38%
-4000-5500 RPM= -36%
-5500-6500 RPM= -35%
-6500 and up= -34%

No diling problem whatsoever. It idles like stock! No dyno yet tho

aids333

I had my injectors down at -40 area at idle, and it was messing up really bad. I am using the 10 watt 10 ohm resistors, not a resitor box, do you think that could be the problem? I have a z6 running 7-9 psi. What spark plugs is everyone using?? Are you getting any pinging with stock timing?

thermal

no pinging @ stock timing @ 8psi. I'm using NGK 7 series, gapped in stock.

aids333

alright I got the idle to work, I put the timing near the middle, I figured that was stock. How can I check? I also had a vacuum tube running from my TB to my map sensor (just left over stuff from the check valves) Bad idea..I have the fuel set at -38 to -35 across the board. It runs so smooth, but now for some reason Im only getting 5 lbs of boost... I dont know what that is about, its probably something not related at all, but when i figure that out Ill let you know. Thanks for the help.

RENR

just an update on my setup, i think everyone is kinda making a big deal on the fact that the afc advances timeing but no one has exact numbers. currectly using the afc im boosting 10psi with boost creep going to 11psi with STOCK timing at the distributor. i was retarding it at the dist when i first started using the hack, but there seems to be no need for it. ive also used the ghettodyne v2.2.1 and well that didnt last in my car more than 15min before i went back the afc.it has those bumps at vacum and felt slower. the AFC WORKS and is smooth!! d16a6 /t3/ customcoach ic/450ccinjectors/walbro intank pump with 208,000 miles! lates!

Dr.Boost

I was getting detonation at stock timing. Otherwise I would have kept it there. I'm going to set it back to stock when I get my ecu back from Joseph.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

2000psi

I can't believe this topic.....sits dead for months, then this sudden revival.

94geeser

i just read through this entire thread and there is some really good stuff here. some very knowledgable people. quick question. i was wondering whether the vafc adjusts the voltage between the map and the ecu in accordance with rpm AND boost or just rpm. i mean, with this setup, will the injectors be pulsed the same at say 5000 rpm/vacuum and 5000 rpm/8psi or does the vafc compensate and vary the voltage with the change in pressure? i've been told its only rpm dependent, but it seems like this would run REALLY rich in low throttle/vacuum. also, is the smc the same/as good as the vafc? i'm cheap. thanks

rextec

it varies it just by rpm. smc ive heard is just as good but a little more difficult to tune, and you dont get the fancy display.