headers require chip tuning? - ZR-1 Net Registry Forums

jeepsrdreaming · 09-26-2019

So my car has headers on it already, but the chip is stock.
I have been trying to find out if the chip does or does not need tuning
I called Mark Haibeck, of course he says yes.
but some forum threads suggested that because factory setting is 6% rich, it should be fine with out tuning

is anyone running headers without tuning, i plan on swapping a new set of OBX SS system

Mystic ZR-1 · 09-26-2019

Listen to Marc...

Paul Workman · 09-26-2019

Well, if it is on the internet, it must be true, right?

I don't know who those mystery "experts" are, but Marc Haibeck is one of THEE premier LT5 practitioners. What he says is golden. You do what you want, but anything done to change the in or out of the LT5 requires a calibration adjustment to realize the full benefit.

And, Marc's calibration can include turning off the 1-4 shift light, and modifying the decel fuel to reduce backfire and exhaust popping on decel too.

Gunny · 09-26-2019

After installing SW headers on my 90 I stayed with the same tune - but only for a little while when it became obvious that I needed to update my chip tune. Marc (others, too) is correct - you need to "fine tune" your engine when making changes to the intake/exhaust system. The only exception I can think of might be mufflers/resonator.

With my limited knowledge it's my understanding that the best tune is with the car in the tuner's hands ... but if you need a really close tune without delivering the car, talk to Marc. He knows/understands the LT5 so well that he can deliver a great tune even when he doesn't have the car in his shop. Best of luck as you get this sorted out.

Ccmano · 09-26-2019

Absolutely needed tuning! Runs lean otherwise, you will notice the difference.
H

Bob Eyres · 09-26-2019

Think of it as an economic issue.
You’ve spend a significant amount of cash to install the new headers. Maximize the horsepower gain by dyno tuning the engine now, for both safety and increased performance at the same time.
I believe you will as much as double the net gain of the headers alone. That serves to maximize gain for the bucks you’ve spent.

Sent from my iPhone using ZR-1 Net Registry

jss06c6 · 09-26-2019

Marc is a rock star! Each motor has it's own signature. No two are alike. If Marc or another competent tuner can personally tune the car the results are exceptional. Get it to Marc or someone with knowledge of the LT-5 and you will see what this motor can deliver...

Sent from my SM-G950U using ZR-1 Net Registry mobile app

09-26-2019	#1
jeepsrdreaming Join Date: May 2018 Location: nyc Posts: 17	headers require chip tuning? So my car has headers on it already, but the chip is stock. I have been trying to find out if the chip does or does not need tuning I called Mark Haibeck, of course he says yes. but some forum threads suggested that because factory setting is 6% rich, it should be fine with out tuning is anyone running headers without tuning, i plan on swapping a new set of OBX SS system

09-26-2019	#2
Mystic ZR-1 Join Date: Jan 2010 Location: Mystic CT Posts: 2,633	Re: headers require chip tuning? Listen to Marc...

09-26-2019	#3
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: headers require chip tuning? Well, if it is on the internet, it must be true, right? I don't know who those mystery "experts" are, but Marc Haibeck is one of THEE premier LT5 practitioners. What he says is golden. You do what you want, but anything done to change the in or out of the LT5 requires a calibration adjustment to realize the full benefit. And, Marc's calibration can include turning off the 1-4 shift light, and modifying the decel fuel to reduce backfire and exhaust popping on decel too. __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry

09-26-2019	#4
Gunny Join Date: May 2005 Location: Georgia Mountains Posts: 927	Re: headers require chip tuning? After installing SW headers on my 90 I stayed with the same tune - but only for a little while when it became obvious that I needed to update my chip tune. Marc (others, too) is correct - you need to "fine tune" your engine when making changes to the intake/exhaust system. The only exception I can think of might be mufflers/resonator. With my limited knowledge it's my understanding that the best tune is with the car in the tuner's hands ... but if you need a really close tune without delivering the car, talk to Marc. He knows/understands the LT5 so well that he can deliver a great tune even when he doesn't have the car in his shop. Best of luck as you get this sorted out. __________________ George Jones Founding Member #14 www.zrwon.com

09-26-2019	#5
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: headers require chip tuning? Absolutely needed tuning! Runs lean otherwise, you will notice the difference. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

09-26-2019	#6
Bob Eyres Join Date: Jul 2005 Location: Jupiter, Fl. Posts: 815	headers require chip tuning? Think of it as an economic issue. You’ve spend a significant amount of cash to install the new headers. Maximize the horsepower gain by dyno tuning the engine now, for both safety and increased performance at the same time. I believe you will as much as double the net gain of the headers alone. That serves to maximize gain for the bucks you’ve spent. Sent from my iPhone using ZR-1 Net Registry __________________ "It's about the car, not the people." 1991 ZR-1 White/Black #1236 (Owner since 1994). Stock engine with bolt-ons: Hurst shifter,"Forced Air" intake, Coplon duct, Bee Cool Radiator, Demon coils, Jeal prom, Watson headers, X pipe, 3" B&B's, Rippie flywheel, 4:10 gears, A molds, Toyo Proxes-R888's 12.06@117mph. 1.76 60ft. Last edited by Bob Eyres; 09-26-2019 at 08:29 PM.

09-26-2019	#7
jss06c6 Join Date: Aug 2015 Location: Magnolia, Texas Posts: 884	Re: headers require chip tuning? Marc is a rock star! Each motor has it's own signature. No two are alike. If Marc or another competent tuner can personally tune the car the results are exceptional. Get it to Marc or someone with knowledge of the LT-5 and you will see what this motor can deliver... Sent from my SM-G950U using ZR-1 Net Registry mobile app

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