C7 headers intake safe without tune?
Thread Starter
Intermediate
Joined: Oct 2017
Posts: 27
Likes: 4
From: York Pennsylvania
C7 headers intake safe without tune?
2015 stingray .I'm about to order kooks 2 inch headers and cattless xpipe, afe cold air intake, and a ported throttle body. I'm going to install all of this myself and then later have it professionally tuned. Will it be harmful to my car to drive around without a proper tune? Also does anybody have whp and torque numbers for this setup? 7 speed manual
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Joined: Oct 2004
Posts: 36,838
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From: Manassas Park VA
St. Jude Donor '07-'08,-'13-'14, '16-'17
No it is not safe to drive your car without a tune - way to lean...
We do have all Kooks and aFe instock and ready to ship...no waiting
Kooks
https://www.corvettepartsandaccessor...te-parts/kooks
aFe
https://www.corvettepartsandaccessor...o-dry-s-intake
Regards
Chip
We do have all Kooks and aFe instock and ready to ship...no waiting
Kooks
https://www.corvettepartsandaccessor...te-parts/kooks
aFe
https://www.corvettepartsandaccessor...o-dry-s-intake
Regards
Chip
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Last edited by CCA Corvette Parts; Oct 4, 2017 at 11:27 AM.
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St. Jude Donor'15
Kyle, remember-if you get headers, as the guys said, it WILL require a tune. If you have to have the car tuned, it voids the warranty.
With you car being a 2015, this may not be an issue. But I wanted to make sure you knew, just in case.
With you car being a 2015, this may not be an issue. But I wanted to make sure you knew, just in case.
Team Owner
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
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Car will run much better with a tune. You are short changing yourself not doing so.
Thread Starter
Intermediate
Joined: Oct 2017
Posts: 27
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From: York Pennsylvania
The car is getting heads/cam package in a couple days. That’s when I get my tune. I installed the headers a couple weeks ago but I wasn’t gonna have it tuned for the headers then again for the cam package. I can definitely tell it doesn’t run the best right now without a tune.
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Safety Car
Joined: Nov 2005
Posts: 4,372
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From: Huntsville Alabama
I did the same thing and drove it for 2-3 weeks before Cam and tuned. Kooks headers no cats and AFE intake. it was fine... and was rich...
the car can make up for alot from the facotry.
the car can make up for alot from the facotry.
Racer
Joined: Oct 2016
Posts: 396
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I have stock cam in my Grand Sport, and with boltons only with 2" headers am currently the 2nd fastest Bolton C7 after checking the latest posts on the fastlist thread. I would say the 2" headers are performing fine.
I also have dyno proof from a 6gen SS to my car same day same dyno one after the other with the only difference being his car has 1 7/8" headers vs my 2" catted setup.. same tuner did both cars. I can post that if you need further proof of the power difference.
I also have dyno proof from a 6gen SS to my car same day same dyno one after the other with the only difference being his car has 1 7/8" headers vs my 2" catted setup.. same tuner did both cars. I can post that if you need further proof of the power difference.
Instructor
Joined: Jan 2016
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Seeing that is a different car, it’s not really “proof”. Cars can varry a decent amount, you could have been making 10-20hp more than him bone stock.From any of the test and comparisons I have seen, the difference is minor either way. Hell enginemasters beat a set of headers to death and collapsed almost all the tubes, still made almost the same power.
Safety Car
Joined: Nov 2005
Posts: 4,372
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From: Huntsville Alabama
Yes, I did. I scanned it many times for lean codes or other issues over the course of that 2-3 weeks. as my cam/DOD parts came in and I was waiting. Only things that popped up where the missing rear O2s. I am not one to "deal" with a dash light....
But when I know the car was going to be completly taken apart in 2 weeks... and then tuned, hard to justify tuning it to make a light go away for 2 weeks. So I waited. Then we dynoed car for a semi baseline and it was Fat not lean with intake and headers... so it was fine the whole time. "Fine" being not hurting it, I am sure a tune would help it take more advantage of the parts... but again, in 2 weeks it was cam install time. I just needed to get the headers installed and I hated driving car so quite.
But when I know the car was going to be completly taken apart in 2 weeks... and then tuned, hard to justify tuning it to make a light go away for 2 weeks. So I waited. Then we dynoed car for a semi baseline and it was Fat not lean with intake and headers... so it was fine the whole time. "Fine" being not hurting it, I am sure a tune would help it take more advantage of the parts... but again, in 2 weeks it was cam install time. I just needed to get the headers installed and I hated driving car so quite.
Sr.Random input generator
Joined: Jan 2008
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From: Sammamish, WA
+1; 2" makes more power, but the gain is not too much, and you'd need to deal with fitment issues. Considering how close it also gets to everything else, I'd stick with 1 7/8" for a track car. For a street/drag car, however, it's not that big of an issue.
Last edited by X25; Dec 28, 2017 at 12:14 AM.
Racer
Joined: Oct 2016
Posts: 396
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Seeing that is a different car, it’s not really “proof”. Cars can varry a decent amount, you could have been making 10-20hp more than him bone stock.From any of the test and comparisons I have seen, the difference is minor either way. Hell enginemasters beat a set of headers to death and collapsed almost all the tubes, still made almost the same power.
Just a note... had ero issues with fitment on my GS with the ARH 2" setup. They fit perfect.
Instructor
Joined: Jan 2016
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The dyno and track times are not going to show that the 2" headers are the soul reason it makes more power, or runs a faster time. Too many variables. Same car, same dyno, different headers, only change. Or repeat the results 5-10-50 times on other cars, a tuner or shop that does hundreds of these would be a good place to start.
I'm not saying 2" don't make more power. I'm saying to have "proof" you need to tighten up your control group.
Racer
Joined: Oct 2016
Posts: 396
Likes: 72
Once again its a different car.
The dyno and track times are not going to show that the 2" headers are the soul reason it makes more power, or runs a faster time. Too many variables. Same car, same dyno, different headers, only change. Or repeat the results 5-10-50 times on other cars, a tuner or shop that does hundreds of these would be a good place to start.
I'm not saying 2" don't make more power. I'm saying to have "proof" you need to tighten up your control group.
The dyno and track times are not going to show that the 2" headers are the soul reason it makes more power, or runs a faster time. Too many variables. Same car, same dyno, different headers, only change. Or repeat the results 5-10-50 times on other cars, a tuner or shop that does hundreds of these would be a good place to start.
I'm not saying 2" don't make more power. I'm saying to have "proof" you need to tighten up your control group.
I have zero issues with low end torque as seen in a 1.55 60ft on stock converter. Top end is decent with a 125.6 trap. From what I can see based on the posts in fastlist thread only Carlos has gone faster in a lighter base car with 3.42 gears and weight reduction.
I like my 2" setup. I think others will be surprised how well they perform in a properly setup car. Fitment wise, I can only speak for the ARH 2" setup... and they fit perfect