Help needed for 383 supercharged LT1
#1
Teching In
Thread Starter
iTrader: (11)
Join Date: Feb 2007
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Help needed for 383 supercharged LT1
I built a supercharged 383 stroker with inner cooler for my 96 SS. I got a basic tune, then took it in to have it dyno tuned and they said my mass airflow sensor wasnt reading right. I replaced it and took it back and they said its still not right. They said it should be reading 12 g/s at idle and its only reading 6. Is there a difference between a lt1 and ls1 mass air flow sensor. I might have gotten one for a ls1-not sure. Just needing to know what I need to do to get this car done. Heres so more info on the motor.
Its a 383 stroker with the LT4 hot cam, 60 lbs injector with 255 intank pump ,trickflow heads, vortech supercharger w/innercooler and the mass airflow is stock and on the charged side of the tubing.
Its a 383 stroker with the LT4 hot cam, 60 lbs injector with 255 intank pump ,trickflow heads, vortech supercharger w/innercooler and the mass airflow is stock and on the charged side of the tubing.
#2
TECH Addict
iTrader: (3)
I built a supercharged 383 stroker with inner cooler for my 96 SS. I got a basic tune, then took it in to have it dyno tuned and they said my mass airflow sensor wasnt reading right. I replaced it and took it back and they said its still not right. They said it should be reading 12 g/s at idle and its only reading 6. Is there a difference between a lt1 and ls1 mass air flow sensor. I might have gotten one for a ls1-not sure. Just needing to know what I need to do to get this car done. Heres so more info on the motor.
Its a 383 stroker with the LT4 hot cam, 60 lbs injector with 255 intank pump ,trickflow heads, vortech supercharger w/innercooler and the mass airflow is stock and on the charged side of the tubing.
Its a 383 stroker with the LT4 hot cam, 60 lbs injector with 255 intank pump ,trickflow heads, vortech supercharger w/innercooler and the mass airflow is stock and on the charged side of the tubing.
#6
Teching In
Thread Starter
iTrader: (11)
Join Date: Feb 2007
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Theres no vacuum leaks. I found that if you unhook the charged side of the tubing going into the motor and just put a rubber boot and maf on it reads 12 g/s and the car runs great. Then when I hook up the charged side back up it drops down to 6 and doesnt run right. Could I need a bigger bypass valve.
Last edited by bucket77; 06-27-2010 at 12:18 PM.
Trending Topics
#8
Banned
iTrader: (10)
I know this will sound crazy, but you should try it. Flip the MAF sensor 45 or 90 degrees at a time, and see if there's not a certain "clock" position it likes. Where it's at in that 180 degree bend in the intake pipe, could have a big impact on how the air is flowing across the hot wire, and in a certaiin position, it may not "see" alot of the air. I'ts worth a shot. Doesn;t cost anything. Flip it 90* and see what the scanner says. That don't work, flip it another 90 and see.
#9
Teching In
Thread Starter
iTrader: (11)
Join Date: Feb 2007
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
I only problem with doing that is the maf is welded to the elbow, but i was thinking the same thing that the air running past it is some how creating some kind of turbulence and messing up the readings.
#13
Teching In
Join Date: Feb 2007
Location: Charleston, SC
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
I'm guessing you have removed the screen, as well.? If so, put a screen back in your MAF and it should clean your signal up considerably.
#14
Teching In
Thread Starter
iTrader: (11)
Join Date: Feb 2007
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
The screen is still in there, it does it will all 3 maf sensors I have. Im going to look at the tubing elbow right before the map tomorrow. I think I need to remove more of the metal tubing going into the rubber boot. I think its directing the air more to one side then the other and maybe that will fix it.
#16
#18
383, cam, charged, lt1, maf, readings, rpm, shut, stroked, stroker, super, supercharged, supercharger, supercharging, translator, vortech