[Z06] Halltech Stinger Questions
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,846
Likes: 5
From: Sandy Ego CA
Halltech Stinger Questions
Hey Guy's- For the last six or so weeks I have been reading all of the opinons regarding all of the most popular air intake system, I was going to go with a Vararam B2 but didn't know if it would be compatible with my new ACI front spoiler and when I saw that Halltech was having a Stinger sale this week for only $199.00 I thought-What the Hell and I ordered one for my 04 Z06 from Nate at Corvette Garage. Question is, some of the threads are stating you will have to get a tune after the installation because it will throwing codes and running lean. Is this a given for all 04's or just some, and when they say " tune " are we talking a dyno tune or one of the hand held type units. Just trying to get a handle on it before my Halltech arrives.
Thanks ! RoHo
Thanks ! RoHo
Pro
Joined: Jan 2003
Posts: 637
Likes: 0
From: Laurel MD
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17
I have the Halltech TRAP on my Z and it did need some computer tuning. I got the LS1 edit and after a few runs on the dyno with the car hooked up to the laptop we were able to get a few more ponies and get the air-fuel ratio set properly. The car's computer will "learn" some upgrades, but I think Halltech's and Vararams cause such an increase in airflow that the computer can't keep up without some help; IMO of course.
Le Mans Master
Joined: Jun 2001
Posts: 7,331
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From: Admit Nothing, Deny Everything, Make Counter Accusations.
Originally Posted by ryanc440
but I think Halltech's and Vararams cause such an increase in airflow that the computer can't keep up without some help; IMO of course.
Drifting
Joined: Jul 2004
Posts: 1,337
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From: Willow Spring N.C.
Yeah, unfortunately my understanding is that the codes were mostly throwing in 04 Z's. I might be wrong, but that is what I'm reading on the different boards. And they are having to get a tune done. There have only been a couple I have seen that say they have not recieved a SES light yet.
There was someone that posted that said a screened maf would stop the code. He said he put a screen around the maf (homemade) and that the SES light went away. Don't know if any validity to it, but hey, figure I'd tell ya.
Will
There was someone that posted that said a screened maf would stop the code. He said he put a screen around the maf (homemade) and that the SES light went away. Don't know if any validity to it, but hey, figure I'd tell ya.
Will
Last edited by Evolution; Aug 26, 2004 at 08:08 AM.
Le Mans Master
Joined: May 2003
Posts: 5,362
Likes: 3
From: Delray Beach FL
From posts I read last month about the Stinger is that the 04 Z's and a couple 03 Z's throw a lean code with the Stinger. Some people let the codes come up and kept clearing them and once the PCM learned about the extra air, they stopped coming up. Others had the PCM reprogrammed by a tuner to do away with the codes as well. 01's, 02's and most 03's do not have this problem as they run richer. Good luck to all of you. Hope it doesn't throw any codes for you!! 
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Le Mans Master
Joined: Jun 2001
Posts: 7,331
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From: Admit Nothing, Deny Everything, Make Counter Accusations.
Originally Posted by QuikZilver
From posts I read last month about the Stinger is that the 04 Z's and a couple 03 Z's throw a lean code with the Stinger. Some people let the codes come up and kept clearing them and once the PCM learned about the extra air, they stopped coming up.
Advanced
Joined: Aug 2004
Posts: 91
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From: Dallas
I know the car will run leaner with the halltech. My question is, will the code really do anything to the car. Does the pcm adjust at all, is there a chance of it learning or do I have to absolutely get a tune if it throws a code.? Can I drive it with the code showing?
Le Mans Master
Joined: Jun 2001
Posts: 7,331
Likes: 518
From: Admit Nothing, Deny Everything, Make Counter Accusations.
Lean codes are not "learned out". Learning is causing them. See my posts in this thread from yesterday.
http://forums.corvetteforum.com/showthread.php?t=891484
Driving with the code popping is kind of silly. Your car will run better with the stock box.
http://forums.corvetteforum.com/showthread.php?t=891484
Driving with the code popping is kind of silly. Your car will run better with the stock box.
Drifting
Joined: Jul 2004
Posts: 1,337
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From: Willow Spring N.C.
The Halltech Trap has piping to run the intake into the front bumper assembly. Hench, producing more HP. The Halltech Stinger replaces the factory airbox with a Filter element at half the price.
You shouldn't just drive around with codes thrown.
You shouldn't just drive around with codes thrown.
Instructor
Joined: Jul 2001
Posts: 183
Likes: 0
From: Severna Park MD
St. Jude Donor '08
Jim Hall stated that the screenless MAF in 04 Zs is causing the problem. I guess the 04s are tuned different from the factory, because with the exception of a few 03s, it's the year most affected. The MAF sensor is giving inaccurate readings of air flow at low throttle openings, due to turbulence, as compared to what the oxygen sensors are reading in the exhaust. This apparently causes the PCM to over adjust the fuel trims, eventually triggering the check engine light and codes 0171 and 0174 (lean banks 1 and 2). The cure is a screened MAF from a 2001 Z06. The screen smooths the airflow, enabling more accurate readings. I think the 2001 MAFs are available from GM Parts Direct for about a $100. I'm only repeating what I've read in other threads. Of course, you can have the car tuned for the Halltech, which should result in more horsepower and eliminate the check engine light and codes, or run the stock air box with a K&N filter.
Burning Brakes
Joined: Oct 2000
Posts: 876
Likes: 23
From: Prescott Valley, AZ
Originally Posted by Jim M
Jim Hall stated that the screenless MAF in 04 Zs is causing the problem. I guess the 04s are tuned different from the factory, because with the exception of a few 03s, it's the year most affected. The MAF sensor is giving inaccurate readings of air flow at low throttle openings, due to turbulence, as compared to what the oxygen sensors are reading in the exhaust. This apparently causes the PCM to over adjust the fuel trims, eventually triggering the check engine light and codes 0171 and 0174 (lean banks 1 and 2). The cure is a screened MAF from a 2001 Z06. The screen smooths the airflow, enabling more accurate readings. I think the 2001 MAFs are available from GM Parts Direct for about a $100. I'm only repeating what I've read in other threads. Of course, you can have the car tuned for the Halltech, which should result in more horsepower and eliminate the check engine light and codes, or run the stock air box with a K&N filter.
Basically I bought a small plastic clothes dryer vent, used only the piece that sits outside the house and mounted it upside down through the shroud directly in the center of where the filter sits. Now my Stinger gets additional cold air from the underside of the filter smoothing the flow over the MAF wires. It does the same thing the screen does on screened MAFs. at least that is the theory and so far so good. Going to an '01 MAF or devising a screen should also work.
Don't let the slight chance your car may throw codes stop you from the benefits of a Stinger. IMO, too much upside to be had.
mark
Racer
Joined: Jul 2004
Posts: 474
Likes: 14
Is it possible to add a screen somehow? How close does the screen need to be to the sensors (less than 1 inch?)? How tight is the screen mesh on an '01 c5?
I could see bracing a screen mesh material in front of the maf by pinning it in between metal rods that extend outside of the walls of the intake tube. It would look something like this:
intakeidea.jpg
I'd have to secure the rods with good locking collars on the outside of the tube and make sure that the rods were a tight fit to the tube and sealed properly. Just a quick idea, I'm sure there are others. It seems a shame to spend $100 on a maf that is the same except for the addition of a wire mesh.
I could do the air hole idea too I suppose. Mark, do you think the same effect positive effect could be realized if the filter itself was lifted higher to allow more air underneath the filter element, or do you think you have some sort of a ram air effect where air is forced to that area of the filter?
I could see bracing a screen mesh material in front of the maf by pinning it in between metal rods that extend outside of the walls of the intake tube. It would look something like this:
intakeidea.jpg
I'd have to secure the rods with good locking collars on the outside of the tube and make sure that the rods were a tight fit to the tube and sealed properly. Just a quick idea, I'm sure there are others. It seems a shame to spend $100 on a maf that is the same except for the addition of a wire mesh.
I could do the air hole idea too I suppose. Mark, do you think the same effect positive effect could be realized if the filter itself was lifted higher to allow more air underneath the filter element, or do you think you have some sort of a ram air effect where air is forced to that area of the filter?
Last edited by Subw00er; Sep 12, 2004 at 08:19 PM.
Burning Brakes
Joined: Oct 2000
Posts: 876
Likes: 23
From: Prescott Valley, AZ
Originally Posted by Subw00er
I could do the air hole idea too I suppose. Mark, do you think the same effect positive effect could be realized if the filter itself was lifted higher to allow more air underneath the filter element, or do you think you have some sort of a ram air effect where air is forced to that area of the filter?
mark
Safety Car
Joined: Aug 2000
Posts: 3,884
Likes: 0
From: Forked River N.J.
Originally Posted by Subw00er
Ack! I just ordered one from Corvette Garage too. Am I going to get check engine lights now?! I dont think there are any places near me to get tune-ups, unless the dealer can do it.
Last edited by ghostRder; Sep 11, 2004 at 10:44 PM.