101 Projects For Your 84-96 Corvette
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 3,076
Likes: 83
From: Everyone needs something to believe in, I believe I'll have another beer. Wisconsin
101 Projects For Your 84-96 Corvette
In the above book, their's a mod. that moves the MAT sensor from the throdle boby extension to an area just behind the air filter & claims a few extra hp gain. someone on another forum claims that this mod. is worthless and in effect can actually cause a drop in hp. What are your thoughts an this? Can anyone substancuate the hp gain or loss. 
Burning Brakes
Joined: Oct 2005
Posts: 798
Likes: 116
From: OAKLEY CA
You get better info here on the forum. I read most of it one night in Barnes and Noble waiting for my wife to finish shopping. I'm sure you married guys know how long a woman can shop. I will give him credit though, after a long explaination of most useless mods, he does tell you that they are basically useless. Fills up a book to sell I guess.
Pro
Joined: Jan 2004
Posts: 707
Likes: 0
From: Syracuse Utah
It's a trick to fool the computer into injecting slightly more fuel into the cylinders. This one works by sending a colder air signal to the computer than what the system is gauged to expect. I've also see gismos that change the resistance of a sensor to fool the computer into doing the same thing.
In general, I wouldn't do it myself for 2-3 hp. You don't gain this hp across the board and in all conditions. The computer uses a bunch of inputs to determine fuel flow under a bunch of conditions. At certain times, fooling the computer with an altered sensor signal will cause the system to pull out fuel and reduce hp, so you actual lose power.
There are lots of good things you can do to pick up power, but this is not one I would consider.
In general, I wouldn't do it myself for 2-3 hp. You don't gain this hp across the board and in all conditions. The computer uses a bunch of inputs to determine fuel flow under a bunch of conditions. At certain times, fooling the computer with an altered sensor signal will cause the system to pull out fuel and reduce hp, so you actual lose power.
There are lots of good things you can do to pick up power, but this is not one I would consider.
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Race Director
Joined: Jun 2004
Posts: 13,963
Likes: 709
From: WI
On the L98 that sensor is used for EGR temp. From what I read it doesn't do anything else for you. It couldn't help or hurt then yes? I moved mine because as I was porting the plenum, it looked to me like it stuck into the air flow. I'm doing all this air flow work and it's sticking up in there like a sky scraper! So it's moved. 
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Originally Posted by ZAWA
I paid 3.95 for the book and felt I got screwed!
Originally Posted by aboatguy
The best place for Newton's book is in the can in case you run out of TP!
It is so full of shyte that it dirties my A$$!
Mike
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
The book is great for a new C4 owner. Helps to explain alot of simple mods . Not that all of these are legitiment mods.
For someone looking to get more accurate air intake temp readings, this is a good mod. But not one that will make more HP.
For someone looking to get more accurate air intake temp readings, this is a good mod. But not one that will make more HP.
Intermediate
Joined: Feb 2006
Posts: 47
Likes: 0
Is this also known as the ambient air sensor? Got an extension to read outside air better because I live in a very hot climate. Running lean only makes engine run hotter. New at this and still don't have all these acronyms down. Doesn't MAP read air flow?
Could use some help here.
Could use some help here.
Melting Slicks
Joined: May 2001
Posts: 3,014
Likes: 18
From: Raleigh, NC
Originally Posted by Hotred94
It's a trick to fool the computer into injecting slightly more fuel into the cylinders. This one works by sending a colder air signal to the computer than what the system is gauged to expect. I've also see gismos that change the resistance of a sensor to fool the computer into doing the same thing.
In general, I wouldn't do it myself for 2-3 hp. You don't gain this hp across the board and in all conditions. The computer uses a bunch of inputs to determine fuel flow under a bunch of conditions. At certain times, fooling the computer with an altered sensor signal will cause the system to pull out fuel and reduce hp, so you actual lose power.
There are lots of good things you can do to pick up power, but this is not one I would consider.
In general, I wouldn't do it myself for 2-3 hp. You don't gain this hp across the board and in all conditions. The computer uses a bunch of inputs to determine fuel flow under a bunch of conditions. At certain times, fooling the computer with an altered sensor signal will cause the system to pull out fuel and reduce hp, so you actual lose power.
There are lots of good things you can do to pick up power, but this is not one I would consider.
Anyone know for sure?
FWIW, I probably wouldn't do the mod.
Last edited by neat; Feb 20, 2006 at 04:34 PM.
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
Its about the same increase as the T/B bypass. 101 Projects was given to me when I purchased my 1996. The book takes procedures and condenses them into two paragraphs. The best way to handle this is to purchase a Helms Manual. www.helminc.com