Cheaper Turbo Option
Thread Starter
Senior Member
True Car Nut
Joined: Sep 2002
Posts: 8,910
Likes: 3
Cheaper Turbo Option
I found a link to this today. This guy did a complete custom turbo setup on his GP. Saved a lot of money too.
http://s92003205.onlinehome.us/17944.html
http://s92003205.onlinehome.us/17944.html
Senior Member
True Car Nut
Joined: Jun 2003
Posts: 6,313
Likes: 2
From: Purgatory
Cool write up Sol, 
I also liked the article on the ls1 maf upgrade, I thought that when you bore out the tb you would have to use a afc to retune the maf or wind up running lean. This article also says that.
I also liked the article on the ls1 maf upgrade, I thought that when you bore out the tb you would have to use a afc to retune the maf or wind up running lean. This article also says that.
Senior Member
Certified GM nut
Joined: Feb 2003
Posts: 2,095
Likes: 0
From: Georgia
Originally Posted by PontiacDad
Cool write up Sol,
I also liked the article on the ls1 maf upgrade, I thought that when you bore out the tb you would have to use a afc to retune the maf or wind up running lean. This article also says that.
I also liked the article on the ls1 maf upgrade, I thought that when you bore out the tb you would have to use a afc to retune the maf or wind up running lean. This article also says that.
I know the different MAF will cause issues because for the same 500gr of airflow it will send a larger or smaller voltage depending on the injectors it was tuned for. This will cause the PCM to pulse the injectors at the wrong length. I've got a link that explains this better if you want it...But porting it?
There are only two outcomes I can think of resulting from playing with the area around the maf. More airflow, more turbulence. The added airflow isn't going to be an issue unless you reach the max the maf can meter. This would be like saying adding a smaller pulley requires you to recalibrate your maf, which isn't the case. The turbulence is too unpredictable to use a set calibration to correct. If its reading 500gr-200gr-900gr-100gr at idle adding a flat 12% isn't going to make it any better.
Whats your thoughts?
Senior Member
True Car Nut
Joined: Jan 2003
Posts: 3,734
Likes: 0
From: Bloomington-Normal, IL 1997 SE
Originally Posted by DrJay
Originally Posted by PontiacDad
Cool write up Sol,
I also liked the article on the ls1 maf upgrade, I thought that when you bore out the tb you would have to use a afc to retune the maf or wind up running lean. This article also says that.
I also liked the article on the ls1 maf upgrade, I thought that when you bore out the tb you would have to use a afc to retune the maf or wind up running lean. This article also says that.
I know the different MAF will cause issues because for the same 500gr of airflow it will send a larger or smaller voltage depending on the injectors it was tuned for. This will cause the PCM to pulse the injectors at the wrong length. I've got a link that explains this better if you want it...But porting it?
There are only two outcomes I can think of resulting from playing with the area around the maf. More airflow, more turbulence. The added airflow isn't going to be an issue unless you reach the max the maf can meter. This would be like saying adding a smaller pulley requires you to recalibrate your maf, which isn't the case. The turbulence is too unpredictable to use a set calibration to correct. If its reading 500gr-200gr-900gr-100gr at idle adding a flat 12% isn't going to make it any better.
Whats your thoughts?
Got too many thread windows open?
Senior Member
Certified GM nut
Joined: Feb 2003
Posts: 2,095
Likes: 0
From: Georgia
Originally Posted by macho_mike21
Originally Posted by DrJay
Originally Posted by PontiacDad
Cool write up Sol,
I also liked the article on the ls1 maf upgrade, I thought that when you bore out the tb you would have to use a afc to retune the maf or wind up running lean. This article also says that.
I also liked the article on the ls1 maf upgrade, I thought that when you bore out the tb you would have to use a afc to retune the maf or wind up running lean. This article also says that.
I know the different MAF will cause issues because for the same 500gr of airflow it will send a larger or smaller voltage depending on the injectors it was tuned for. This will cause the PCM to pulse the injectors at the wrong length. I've got a link that explains this better if you want it...But porting it?
There are only two outcomes I can think of resulting from playing with the area around the maf. More airflow, more turbulence. The added airflow isn't going to be an issue unless you reach the max the maf can meter. This would be like saying adding a smaller pulley requires you to recalibrate your maf, which isn't the case. The turbulence is too unpredictable to use a set calibration to correct. If its reading 500gr-200gr-900gr-100gr at idle adding a flat 12% isn't going to make it any better.
Whats your thoughts?
Got too many thread windows open?
