C6 Corvette Z06 Headers Installed - Why Dyno Numbers Don't Matter!

[@danlaur7973]

C6 Z06 OEM exhaust manifolds flow well, headers will net you a gain but not worth the 3k cost for an aftermarket headers/x pipe/ceramic coating price tag

[@InJasonsGarage]

@15:55

[@redherring395]

Excellent video!! You've really explained very well why dyno numbers should be taken with a grain of salt and why it isn't wise to compare dyno numbers from earlier dyno sessions with current dyno sessions. I've been drag racing for around 30 years and was told early on in the hobby that "we don't race dyno's". The only time I've ever compared dyno numbers is on the day of the dyno test. First I'll get a baseline number and then make changes to the car and compare the before and after information. I'm also impressed with the shop for taking the time to compare the results of the different tire compounds (sticky track tires vs real DOT street tires). I've noticed that a lot of people these days don't seem to realize that a drag radial or other sticky track tire will actually lose power on a dyno as opposed to a real DOT street tire.

[@paedahe4975]

Here it is winter already and your still beatin the heat.👍

[@InJasonsGarage]

You got that right! 😎

[@nyplantingsgardendesigners5645]

Great voice and presence on video buddy. This should have many more views. It took me a long time to find the vid. Searched C6 Z06 Long Tube Headers. I now have a c7 but wanted to send info to the buyer of my C6z. Man, if anyone has a C6Z...don't sell it! Best, Todd

[@InJasonsGarage]

Thanks! I have been thinking of selling it for a C8...but I can't seem to get very far with the idea. :)

[@Matty.Garage]

LOVE IT!!!! I'm with man, Dyno number doesn't matter especial for us "street drivers". It means nothing, as long as you car drives well this is what matters! I don't get why there is "thing" that we have among car people "My car made 600hp" says the owner super proud and only drives it at 40mph to go to a car show! lol lol! Great Content buddy!

[@lag1791]

You are 100% right on. Plus Mustang Dyno's are called heartbreaker dyno's for a reason. My 06 Z (H/E/C/I) made 544whp on a Mustang Dyno and it has a much more aggressive cam than your car. I meet other people with same mods making 600whp on dynojets. I just usually respond "wow what's your trap speed and 1/4 times? Mine is 133mph and best on street tires (R888R's) is 10.8sec"! That tells more than any other slip of paper. Anyway I bet you picked up 25-35hp on those headers and tune. Stock ones really are not that great. You still on stock clutch? If so I see that being your next mod. Last winter I installed (on jack stands) a Monster LT-S dual disc and I can't even tell you how much I love it. Anyway keep on rollin.

[@williamalcala5660]

Hci z should be trapping 140 9.9 9.8 your car definitely run like ass

[@rusilver2]

kudos for being honest about what the dyno results were

[@InJasonsGarage]

Thanks! I think people in general need to be honest about what dyno numbers are for and what they aren’t. People can throw all kinds of money into a car and have it make big dyno numbers, but hate to drive it because it isn’t enjoyable any longer. It happens. What’s the point in that?

[@rusilver2]

@@InJasonsGarage a good practice would be for them to run a dyno, make whatever modifications, in your case, new exhaust, then dyno again. lots of places will do a before/after dyno

[@InJasonsGarage]

@@rusilver2 Agreed, we should have done a dyno session before we did the header install.

[@codyboykin4425]

Had my c6 tuned there too! It made 520hp/480tq on 93 (a year ago) and 570hp/510tq on e85 just a few months ago. The tuner said on a dynojet at the other shop he tunes at (skye performance) it would’ve been around 630hp. Live just a few miles away from BA

[@corvetteZ3r]

Boosted?

[@jaxjax5322]

Some times the altitude on the land on N/A afects

[@chrismelnyk1294]

Very possible that the old dyno numbers were inflated by the dyno being "out of tune" so if it was actually at 450hp at the wheels, it would all make sense

[@jaxjax5322]

On the 1/4 mile track its where you have the real deal not the dyno

[@goltzhar]

G-Man is making the comment!

[@InJasonsGarage]

Where ya been? 😊

[@Schwing3]

Yeah a dyno is a tune to tell how much gain you get from mods, it gives you a ballpark figure of what it should do across the board with dynos (as long as they're setup properly) that's why tuners always do a before and after dyno to establish base lines and then the gains from the mods, but at the end of the day a dyno is just a tool and if its not setup properly it won't read properly 🤷‍♂️

[@G33kLife747Flying]

Love the content man! Do you know of any major cases with dropped valves after addressing the heads?

[@InJasonsGarage]

Thanks! Having the heads addressed seems to have reduced the odds of dropped valves significantly.

[@corvetteZ3r]

I do. They drop even after fixing, especially if set up incorrectly

[@dpracing1]

Take it to the drag-strip and post your trap speed. You’ll know for sure how much power it makes.

[@InJasonsGarage]

Agreed! I have been thinking of doing just that. It has been quite a few years since I made a 1/4 mile pass. I think it was around 2008 or so in my Trailblazer SS. Sure do miss that vehicle.

[@dpracing1]

@@InJasonsGarage Any idea what the density altitude (DA) was at the time of dyno?

[@InJasonsGarage]

@@dpracing1 I just double checked the sheet and I don't see it listed. Educate us...if we knew the number, how would it be useful?

[@Man_of_TheWay]

@@InJasonsGarage density altitude is the "altitude" the engine thinks it's actually at performance wise. As temperature goes up past an ISA temperature the air density decreases, therefor per unit of mass of air ingested into the engine there are less molecules of actual air being utilized in the combustion. So higher density altitude is an undesirable variable and lower density altitude is more desirable performance wise in general. So density altitude is pressure altitude corrected for temperature. There's more to it but this is a basic working input on how DA affects output.

[@Yellow_Car_Bad]

mustangs dynos usually are much lower in numbers.

[@casino8857]

Put it on dyno jet and see what it does...... Plus if I'm paying thousands of dollars dyno numbers DO MATTER and the street/track experience too.... Just look at KZbin videos and bout dynojets vs mustang dynos

[@TheSoundofSpeed]

I'm actually looking to add AR Headers to my C6 ZO6, I also want to get them Jethot coated. Do you happen to know the length measurement they gave them for the quote? I want to get a quote for their Ultra 2500 coating which I've used on a bunch of other platforms and it absolutely rocks.

[@InJasonsGarage]

I dug around for my work order and I cannot locate it...which is rare for me, I keep documentation on everything.

[@TheSoundofSpeed]

@In Jason's Garage no problem at all, I really appreciate you looking!

[@LoneWolfSnowplowing]

Dyno numbers ABSOLUTELY matter, but at the same time apples to apples comparisons do too. Justifying your disappointment in hp numbers is just psychological.

[@35057]

Uh oh. Don’t let the keyboard jockeys at corvette forum hear about this. 🙄 I can’t w that forum anymore But question for ya.. How do you feel the interior cabin space is compared to a C5? I always feel like my C5 is pretty cramped.. more so than I expected but it doesn’t really other me. I’m 6’3” also. And fwiw, coilovers changed cornering immensely 😳😳😳 planted and just all grip and predictable.

[@InJasonsGarage]

Been quite a long time since I was in a C5, but I seem to recall it being less roomy than a C6. Might just be my memory, though.

[@MaXpeedingRods_Coop]

Cool builds ! how could we sponsor something ?❤

[@InJasonsGarage]

Thanks for asking. I am very selective on sponsorship deals for this channel. I will only consider sponsorship if it is beneficial to my viewers and I am able to retain complete control over my opinions of whatever products I review. If you are still interested and have something in mind that meets the above, feel free to connect with me at [e-mail], Thanks again!

[@MaXpeedingRods_Coop]

@@InJasonsGarage sure thing !

[@donvic5477]

What size headers did you use in the zo6? Thanks

[@InJasonsGarage]

1-7/8"

[@kevinbrowder3685]

Your intake manifold and throttle body need to be upgraded to take advantage of your setup… You have essentially made it way to efficient at releasing the air/pushing air out…. you are chocking it… your engine has a huge appetite for air now… & you are inadvertently starving it. I would bet a 40-50 hp gain from a MSD intake manifold and NW 103 throttle body… Btw: that shop should know that. I wish you the best with it… I could see the disappointment on your face during the interview

[@InJasonsGarage]

I wasn't too disappointed...but I was apprehensive because I hadn't driven it yet. Once I did...I was pretty happy as you could tell. We did discuss a few things as a next step, including intake and throttle body upgrades and an E85 conversion kit. Just haven't gotten to it yet. I've been kicking around getting a C8...

[@tomkat2803]

Do you plan on upgrading to the c8 ?

[@InJasonsGarage]

Yes, as soon as I can get my hands on a C8 Z06...and be able to afford it. :D

[@dbarge7617]

Mustang dynos are notoriously stingy

[@richardcerritelli9657]

Headers are bullshit on the C6 Z06 you'll gain nothing the stock ones are so good already get the cam ported heads and a tune the best bang-for-the-buck don't waste your money on a noisy exhaust and bulshit headers.

[@InJasonsGarage]

Yeah, I agree...total bullshit. I hate my car now. Putting it up for sale. Noisy bullshit and no fun, at all...ever. No car should be noisy bullshit.