Headers installed, tune required

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Oct 29, 2007 | 09:46 PM

motogib1

Thread Starter

Melting Slicks

Joined: Feb 2007

Posts: 3,182

Likes: 10

From: New Smyrna Beach Florida

Headers installed, tune required

hey guys,

I have just installed melrose headers and high flow cats on 02 coupe, nice setup.

Car runs good, no codes, slight surge at idle. Would like to get a tune. Anyone know of a tuner in area of columbus/ dayton ohio area. Would a street tune suffice for a header install?

Thanks so much,

Tim Gibson

Oct 29, 2007 | 09:51 PM

Brandon619

Le Mans Master

Joined: Dec 2003

Posts: 5,047

Likes: 251

From: San Diego

I would get it tuned. Do you have a intake and exhaust?

Oct 29, 2007 | 10:05 PM

motogib1

Thread Starter

Melting Slicks

Joined: Feb 2007

Posts: 3,182

Likes: 10

From: New Smyrna Beach Florida

Yes, have intake, and corsa pace car catback as well as LTs and high flow cats. Had a street done with intake and catback. Would like to get it tuned, just wondering if street tune is good enough. Don't really want to pay for dyno tune. Also looking for tuner in my area. Previously had street tune in Milford Ohio. Car ran well but is a long drive.

Thanks

Oct 30, 2007 | 07:20 AM

BudgetPlan1

Le Mans Master

Joined: Aug 2004

Posts: 6,723

Likes: 1,088

From: NE OH

St. Jude Donor '09-'10

Don't think this guy does tuning but he may be able to point you to someone who does.

www.tachitupmotorsports.com

some previous threads re: Columbus

http://forums.corvetteforum.com/show...olumbus+tuning

http://forums.corvetteforum.com/show...olumbus+tuning

http://forums.corvetteforum.com/show...olumbus+tuning

Oct 30, 2007 | 08:14 AM

Zee916

Pro

Joined: Sep 2005

Posts: 531

Likes: 0

From: Spicewood, TX

No tune for me w/ LT's and intake. I cannot justify $500 that most want for such a small amount of mods. My cars smooth as silk though.

Oct 30, 2007 | 08:46 AM

madmatt9471

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-----

No! But we'd like to see some pics of the new set-up!

You'll love having it tuned and getting all you can out of one of the best mods one can do

Thanks,Matt

Oct 30, 2007 | 12:22 PM

Rob's 73

Drifting

Joined: Dec 1999

Posts: 1,541

Likes: 2

From: Raleigh NC

Re-tunes are important when doing any mod that affects air flow. Not just a WOT tune either. If you are historically running lean during crusie mode the PCM adds a percentage of fuel to keep you at 14.68. If you enter WOT or PE mode from a point that you have been historically lean, the same amount of fuel is added during WOT or PE mode. You could actually end up with less power at WOT because you are rich. The best mod I've ever done was the purchase of HP Tuners Pro with a wideband.

Oct 30, 2007 | 01:43 PM

Corvette Don

Le Mans Master

Joined: Jun 2006

Posts: 6,979

Likes: 31

From: Wichita KS

I have had headers for about 2k miles with no tune and pulled the heads off last night and the pistons have a ton of carbon on them, prob cause I am running so rich, I would get a tune man

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Oct 30, 2007 | 03:25 PM

Nulltime

Drifting

Joined: Aug 2005

Posts: 1,924

Likes: 0

From: CT

I just put headers on mine 9 days ago. It is a daily driver and I will need to hold off on a tune till the spring by the look of things. Definitely has a bunch more oompf than previously. Question can any harm come of this? In that time frame I expect to put on 5k+ miles.

Oct 30, 2007 | 05:03 PM

#10

BATM4N

Le Mans Master

Joined: Feb 2006

Posts: 5,488

Likes: 4

From: USA

Quote:

Originally Posted by Zee916

No tune for me w/ LT's and intake. I cannot justify $500 that most want for such a small amount of mods. My cars smooth as silk though.

If you can find a good tuner for $500 I'd jump on it quick

Price has gone up and hard to find for less than $600

Oct 30, 2007 | 05:18 PM

#11

motogib1

Thread Starter

Melting Slicks

Joined: Feb 2007

Posts: 3,182

Likes: 10

From: New Smyrna Beach Florida

Thanks for the input. I am gonna take it into Daves total performance (Milford, Ohio) sometime this week for a street tune $175. I'll get the car up in the air this weekend and take some pics. The melrose headers and randon cats is a sweet looking setup.

Oct 30, 2007 | 11:29 PM

#12

canar

Instructor

Joined: Oct 2007

Posts: 131

Likes: 0

From: Yorkville IL

Quote:

Originally Posted by Rob's 73

I looked on the website and the hp tuner looks nice. The problem is how do you know what to adjust to make the car better?

Oct 30, 2007 | 11:34 PM

#13

mvvette97

Melting Slicks

Joined: May 2005

Posts: 3,394

Likes: 12

From: Leon Iowa

St. Jude Donor '06-'07-'08-'09

Quote:

Originally Posted by canar

I looked on the website and the hp tuner looks nice. The problem is how do you know what to adjust to make the car better?

I also am wondering that?

Oct 30, 2007 | 11:47 PM

#14

Bill Curlee

Tech Contributor

Joined: Dec 1999

Posts: 32,910

Likes: 2,402

From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

The secret is MAF tuning and to look at your WOT & cruising O2 readings iwith a wide band. You will need to monitor your O2 sensor outputs and adjust your tune to obtain the optimum O2 sensor readings.

Spend the extra cash to obtain your OWN tuning software ( HP Tuners OR EFI Live ) and learn to tweak your on C5 tuning. Tat way, you can adjust your own tune when you change stuff.

BC

Last edited by Bill Curlee; Oct 30, 2007 at 11:56 PM.

Oct 31, 2007 | 12:52 AM

#15

FUN LS1

Safety Car

Joined: Dec 2006

Posts: 4,188

Likes: 1

From: Chino California

St. Jude Donor '08-'09

After I bought my bone stock 01 Coupe I put on a Halltech Stinger and Borla Stingers and paid for an initial tune. After I install my American Racing Headers sometime this week/weekend I'm going in for a retune. A little money spent now is a lot better than a ton of money spent on a tow truck later.

Oct 31, 2007 | 01:15 AM

#16

5W0P3

Le Mans Master

Joined: Jun 2006

Posts: 5,562

Likes: 1

From: Bedford TX

My old z06 (02') made 387rwhp with out a tune and Stainless Works headers and a halltech stinger. I didn't see a need for a tune.

My current z06 is stock with a tune lol. It made 372rwhp, now i can't justify headers lol

Oct 31, 2007 | 02:41 AM

#17

canar

Instructor

Joined: Oct 2007

Posts: 131

Likes: 0

From: Yorkville IL

Quote:

Originally Posted by Bill Curlee

Is there a link someplace that explains how to do that in a little more depth?

Oct 31, 2007 | 08:19 AM

#18

0euro@EFIAlchemy.com

Former Vendor

Joined: Apr 2007

Posts: 1,331

Likes: 4

From: Jacksonville Florida

Quote:

Originally Posted by canar

Is there a link someplace that explains how to do that in a little more depth?

Not really, there are plenty of how to's for tuning, but its something that takes months/years to learn to do correctly. I was fortunate enough to apprentice under one of the southeasts most respected LS tuners and it still took a LONG time to get a full grasp of how everything works, and to this day i learn something new on every car i tune. I do agree with the above poster who says buy EFI Live and learn to tune your own car, but its not gonna happen overnight, very steep learning curve.

For those that are running on headers untuned, yes the car will run just fine, but youd be amazed at how inneficient it really is running, when you get all the monitoring equipment in the car and do a street tune, youll find out just how "off" an untuned car with headers is.

Oct 31, 2007 | 08:39 AM

#19

Rob's 73

Drifting

Joined: Dec 1999

Posts: 1,541

Likes: 2

From: Raleigh NC

Quote:

Originally Posted by canar

Is there a link someplace that explains how to do that in a little more depth?

Head over to hptuners.com and look at their forum. There is a ton of help there. The next version is supposed to come with autotune. You still need to know what you are doing but it will speed up the process of a complete street tune.

If you know some who has it ask them to scan your car while you drive. That part doesn't require licenses. That's how I got hooked. I was running about 8% lean during normal cruise. The PCM will compensate for that but that number will carry over if you go into Power Enrichment mode. The narrow band O2s do nothing when you are in Power Enrichmode (no adjustments). The PCM does a "guess" on how much fuel you need but errors on the side of caustion (rich). That's why you need a complete tune and not just a WOT tune.

Oct 31, 2007 | 10:20 AM

#20

canar

Instructor

Joined: Oct 2007

Posts: 131

Likes: 0

From: Yorkville IL

Maybe it is better then to pay someone to tune it for you? I have also read stories on here about people getting their cars tuned wrong which trashed their motor?

How much do reputable shops normally charge to do a tune for you?

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