MAF sensor, Stock or Aftermarket?
Thread Starter
Instructor
Joined: Dec 2001
Posts: 165
Likes: 0
From: Finspong, Sweden
MAF sensor, Stock or Aftermarket?
Hello
Have a quite heavily modified LS7 based engine, N/A, in my 1999 C5 and making some additional power by nitrous.
So far I have been running with stock LS1 MAF sensor.
Question is, any gains in changing to an aftermarket MAF sensor, Granatelli for instance?
Thanx
Tommy
Have a quite heavily modified LS7 based engine, N/A, in my 1999 C5 and making some additional power by nitrous.
So far I have been running with stock LS1 MAF sensor.
Question is, any gains in changing to an aftermarket MAF sensor, Granatelli for instance?
Thanx
Tommy
Race Director
Joined: Mar 2007
Posts: 18,308
Likes: 21
From: Marlton. Increasing performance one speeding ticket at a time! NJ
Hello
Have a quite heavily modified LS7 based engine, N/A, in my 1999 C5 and making some additional power by nitrous.
So far I have been running with stock LS1 MAF sensor.
Question is, any gains in changing to an aftermarket MAF sensor, Granatelli for instance?
Thanx
Tommy
Have a quite heavily modified LS7 based engine, N/A, in my 1999 C5 and making some additional power by nitrous.
So far I have been running with stock LS1 MAF sensor.
Question is, any gains in changing to an aftermarket MAF sensor, Granatelli for instance?
Thanx
Tommy
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
SD works best in stable climates without wild temperature/humidity swings.
Breecher, you live in WI too, where we enjoy anything but that stability.
That's the one and only reason MAFs are still useful, they are a great compensator for weather.
Breecher, you live in WI too, where we enjoy anything but that stability.
That's the one and only reason MAFs are still useful, they are a great compensator for weather.
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Thread Starter
Instructor
Joined: Dec 2001
Posts: 165
Likes: 0
From: Finspong, Sweden
Interesting inputs guys, thanx.
For reference I am running 90mm LS2 throttlebody and a FAST 90mm intake aggressive cam and ported cyl heads etc.
Will look into the Speed Density way but over here in Sweden the climate changes can vary quite a bit.
For reference I am running 90mm LS2 throttlebody and a FAST 90mm intake aggressive cam and ported cyl heads etc.
Will look into the Speed Density way but over here in Sweden the climate changes can vary quite a bit.
Le Mans Master
Joined: Feb 2009
Posts: 5,169
Likes: 199
From: Your Sister's Bedroom
Very true, but sometimes SD is the only way to go once you reach a certain point. I know thats the point were at with the Blue Z06. This winter it got a new mill and a SD conversion.
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
Speed Density is my thoughts too for your set-up, especially since you are FI with the NOS!
I would not go to a Granetelli -
Thanks,Matt
I would not go to a Granetelli -
Thanks,Matt
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
When you step up into the 427-447 CI engine arena, like what's being discussed here (OP did say LS7-based), and assuming a minimum of a 90mm TB (95 and 102 TBs being widely used out there too), the stock 75 or 85 mm MAF quickly becomes a considerable restriction in the intake tract.
Something like this , or this can be quite beneficial in allowing the big cube engine to get the air it needs, while still measuring the incoming airflow...if your desire is to keep a MAF sensor at all.
Thread Starter
Instructor
Joined: Dec 2001
Posts: 165
Likes: 0
From: Finspong, Sweden
Solid advice for a stock-sih 346 engine. But not applicable to this discussion.
When you step up into the 427-447 CI engine arena, like what's being discussed here (OP did say LS7-based), and assuming a minimum of a 90mm TB (95 and 102 TBs being widely used out there too), the stock 75 or 85 mm MAF quickly becomes a considerable restriction in the intake tract.
Something like this , or this can be quite beneficial in allowing the big cube engine to get the air it needs, while still measuring the incoming airflow...if your desire is to keep a MAF sensor at all.
When you step up into the 427-447 CI engine arena, like what's being discussed here (OP did say LS7-based), and assuming a minimum of a 90mm TB (95 and 102 TBs being widely used out there too), the stock 75 or 85 mm MAF quickly becomes a considerable restriction in the intake tract.
Something like this , or this can be quite beneficial in allowing the big cube engine to get the air it needs, while still measuring the incoming airflow...if your desire is to keep a MAF sensor at all.
Did 10.41 on the quarter mile with the old setup so now I am looking in to going down towards 9.50 times this season...
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Good info here So what would you guys recommend for my set-up (mods in sig below). I am going to be adding the Vararam air-bridge and relocating the MAF closer to hte ported 90mm TB.
Any suggestions? Will it require a retune?
So what would you guys recommend for my set-up (mods in sig below). I am going to be adding the Vararam air-bridge and relocating the MAF closer to hte ported 90mm TB. Any suggestions? Will it require a retune?
