my vafc hack setting and problems
#1
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my vafc hack setting and problems
i finally got the hack setup with the dsm 450's and here are my settings
this is on a sohc @9psi with built internals, non intercooled for now.
lo/hi and narrow/wide are all set to the same thing.
1-2.5k - 40%
3k-39%
4k- 37%
5k - 36%
6k- 34%
7k - 33%
7 + - 33%
seems to run pretty good. the problems i am having is
the car idles fine untill under load. then when say i pull up to a light
it dies, every time. i gotta feather the brake and the gas to keep it going.
also in and out of throttle is a bit jerky. if i bang the throttle no problems ,
it seems to be only under normal driving conditions. just a little jerk, nothing
bad, but it was not there before.
any ideas on what settings i can change to correct these issues.
thanks
platinum.
Modified by platinum00 at 3:45 AM 6/9/2003
this is on a sohc @9psi with built internals, non intercooled for now.
lo/hi and narrow/wide are all set to the same thing.
1-2.5k - 40%
3k-39%
4k- 37%
5k - 36%
6k- 34%
7k - 33%
7 + - 33%
seems to run pretty good. the problems i am having is
the car idles fine untill under load. then when say i pull up to a light
it dies, every time. i gotta feather the brake and the gas to keep it going.
also in and out of throttle is a bit jerky. if i bang the throttle no problems ,
it seems to be only under normal driving conditions. just a little jerk, nothing
bad, but it was not there before.
any ideas on what settings i can change to correct these issues.
thanks
platinum.
Modified by platinum00 at 3:45 AM 6/9/2003
#2
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Re: my vafc hack setting and problems (platinum00)
what is your fuel pressure set at?
might be too rich, thats why you are cutting out. My 1-2k is -48%
and the jerking is common with the vafc and dsm setup.
9psi...........non intecooled? ouch!
might be too rich, thats why you are cutting out. My 1-2k is -48%
and the jerking is common with the vafc and dsm setup.
9psi...........non intecooled? ouch!
#3
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Re: my vafc hack setting and problems (dirtySOHC's)
fuel pressure is a 31 with hose on.
i have only been running this setup for liek 1 day now. is 9 to much. with no intercooler.
what should i run at till i get that in place..
i have only been running this setup for liek 1 day now. is 9 to much. with no intercooler.
what should i run at till i get that in place..
#4
Member
Re: my vafc hack setting and problems (platinum00)
try these settings instead, it should run fine.
1-4 -40
4.5-5 -38
5.5-6 -36
6.5-7.5 -35
also don't forget to set a setting for 7.5 just in case you over rev.
1-4 -40
4.5-5 -38
5.5-6 -36
6.5-7.5 -35
also don't forget to set a setting for 7.5 just in case you over rev.
#5
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Re: my vafc hack setting and problems (platinum00)
You are running really rich. Try to set the idle around %50 and 7000 rpm no less than %40. I have mine set at 53% Idl-2k, decreasing to 44% at redline and I am still rich. It doesn;t hurt to try different settings. Just record what settings you have now, and go from there. Also make sure you have retarded your timing or you have a btm. You don't want to melt your motor befor you get to the dyno. I am also pushing 9 psi on a sohc currently and theses settings were verified on the dyno w/ a wb so, do as you wish.
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Re: my vafc hack setting and problems (CivicSoul)
and by the way, 9 psi w/out an intercooler is not a good idea. Maybe if you had, a really efficient turbo like a gt25, you might be able to get away with it for a while, be most likely you are not. If you have spent the money on built internals, spend the money on an IC and tuning!
#7
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Re: my vafc hack setting and problems (CivicSoul)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicSoul »</TD></TR><TR><TD CLASS="quote"> I have mine set at 53% Idl-2k, </TD></TR></TABLE>
-53%?
-53%?
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#8
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Re: my vafc hack setting and problems (dirtySOHC's)
i have a intercooler just a little starion. i need piping. and i was thinking of getting something better. only reason it is not there yet.
what is the best cheap intercooler.
i will drop it back down to say 7psi.. and mess with the settings.
what is the best cheap intercooler.
i will drop it back down to say 7psi.. and mess with the settings.
#9
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Re: my vafc hack setting and problems (dirtySOHC's)
Yes -53%, the starion will work fine for under 12 psi. The only downside to it is the pressure drop but it is not a prob if you stay below 12
#11
Re: my vafc hack setting and problems (platinum00)
have you ever adjusted your throttle cable? you should have less than 1/4inch deflection. also readjust your idle screw and turn your idle up slightly. i had the same problem until i leaned out my 1k setting to -47 and readjusted my idle setscrew. try turning on your ac and it will raise your idle and help keep you from stalling hopefully. definately mount that fmic, get it to a dyno, and reset your idle and you are good to go. i'm running 8psi now w/ no detonation.
check out my page for my settings:
http://hometown.aol.com/scttydb411/hmtproject.html
check out my page for my settings:
http://hometown.aol.com/scttydb411/hmtproject.html
#12
Re: my vafc hack setting and problems (platinum00)
oh yeah...and the stuttering usually occurs at low throttle % while cruising. when you get to like 5% throttle or less your ecu shuts down the injectors causing that quick little jerk. you'll get used to it and it was there using stock injectors and i/h/e setup it wasn't just as noticeable.
#13
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Re: my vafc hack setting and problems (platinum00)
I had the same problem of the car shutting off when I came to a stop and put it in neutral. I was at -45% correction, I richened it up to -40% and it never stalls now. But it does seem harder to start.
#14
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Re: my vafc hack setting and problems (red_sir)
I could be unobservant, but doesn't the afc only trim to 50%?
Also, I would say that you are possibly TOO LEAN at idle. To get a smooth idle I have to have the trim set at around -25% below 1000rpm. Worth a try if nothing else works.
Also, I would say that you are possibly TOO LEAN at idle. To get a smooth idle I have to have the trim set at around -25% below 1000rpm. Worth a try if nothing else works.
#15
Re: my vafc hack setting and problems (red_sir)
my 440cc injectors for me..idles great at -25%...larger injectors take longer to open and will need more fuel to compensate at each pulse...soemtimes tho...but when i used dsm they were gay and tossed them...i never got them cleaned wither so maybe that was the problem...
1k -25%
2-4.5k -38%
5k-6k -37%
6k-up -36%
1k -25%
2-4.5k -38%
5k-6k -37%
6k-up -36%
#16
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Re: my vafc hack setting and problems (eg6turbo)
im planing on running over 12psi sometimes.
so looks like i need a different intercooler. ? what about the Spearco Intercooler. how good are those. and what psi are the efficient to.
i adjusted my settings to 1 -2 k 44% and adusted my throttle cable . seems to be better. sometimes it idles at like 1000 now. but normaly around 750 -800.
so looks like i need a different intercooler. ? what about the Spearco Intercooler. how good are those. and what psi are the efficient to.
i adjusted my settings to 1 -2 k 44% and adusted my throttle cable . seems to be better. sometimes it idles at like 1000 now. but normaly around 750 -800.
#17
Re: my vafc hack setting and problems (platinum00)
you've got the cable just a hair too tightly adjusted. loosen it just a hair and then there should be a little black plug with a tab on it. pull that out and there should be a little idle adjusment screw on the tb. adjust that a little until idle comes up. it shouldn't bob or hunt for idle if you do it that way.
#19
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Re: my vafc hack setting and problems (platinum00)
dude, look up the user "boostcoolers" on ebay. he sells custom sized spearco cores with his end tanks. pretty cheap too
or look here http://www.homemadeturbo.com/f...=5795
this is an old group buy, im sure its over now http://www.homemadeturbo.com/f...art=0
or look here http://www.homemadeturbo.com/f...=5795
this is an old group buy, im sure its over now http://www.homemadeturbo.com/f...art=0
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