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ZR1 Headers...

 
Old 03-06-2019, 03:02 AM
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JohnCarlson
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Default ZR1 Headers...

Hey guys, its tax return season, and I'm thinking Headers and x pipe (decatted). I was wondering if anyone here has had experience with them on? Also wondering if you have the 90* o2 sensor port from big daddies installed too. From what I understand, the lt4's didn't like headers unless you took em out to dinner and gave them a tune. I'm assuming the lt5 is the same. I've seen the guys at weapon-x run headers. If all I get is an annoying CEL I'm fine, but I'd rather not throw any rods. Also, I'm running the stock intake as of now. P.s, running 91oct so timing is already bitching at me
Thanks, guys!

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Old 03-06-2019, 08:10 AM
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Headers and xpipe show to be an excellent move for the ZR1(on 93). Gains are there, power band still smooth, and no indication showing the ZR1 is not liking the additions. Do you plan to use 91 all the time? Have you logged the timing, or can actually feel the power drop off already? Track or road use? A before and after dyno session with logging should go with the install. Let us know what headers and xpipe you want.
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Old 03-06-2019, 08:21 AM
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Originally Posted by HorsePowerAddicts View Post
Headers and xpipe would be an excellent move for the ZR1! Gains are there, power band still smooth, and no indication showing the ZR1 is not liking the additions. Do you plan to use 91 all the time? Have you logged the timing, or can actually feel the power drop off already? Track or road use? A before and after dyno session with logging should go with the install. Let us know what headers and xpipe you want.
Thanks for chiming in, are you running the big daddies foulers to get rid of the check engine light?
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Old 03-06-2019, 12:17 PM
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Originally Posted by HorsePowerAddicts View Post
Headers and xpipe show to be an excellent move for the ZR1(on 93). Gains are there, power band still smooth, and no indication showing the ZR1 is not liking the additions. Do you plan to use 91 all the time? Have you logged the timing, or can actually feel the power drop off already? Track or road use? A before and after dyno session with logging should go with the install. Let us know what headers and xpipe you want.
When I first dynoed the car, I was getting a big loss of timing at 4.5k rpm, and it was leveling out after that. That was on 91, and if I recall, I ran 609hp at the wheels. I used 100 at the track and didnít notice a difference in power, I believe that the 100 recommendation for track usage is simply gem tryjng to stave off knock at high temps. I try to run a mix of 91 and 100 whenever I find myself near the only 100 pump within 100 miles. Iíd prefer to not run cats but the car is mainly a street car.
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Old 03-06-2019, 12:37 PM
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Originally Posted by JohnCarlson View Post
Hey guys, its tax return season, and I'm thinking Headers and x pipe (decatted). I was wondering if anyone here has had experience with them on? Also wondering if you have the 90* o2 sensor port from big daddies installed too. From what I understand, the lt4's didn't like headers unless you took em out to dinner and gave them a tune. I'm assuming the lt5 is the same. I've seen the guys at weapon-x run headers. If all I get is an annoying CEL I'm fine, but I'd rather not throw any rods. Also, I'm running the stock intake as of now. P.s, running 91oct so timing is already bitching at me
Thanks, guys!
Yes, sounds great. I include the OBD port to sync to your phone to turn off too... happens occasionally but only once per drive. We have our big tax return sale going on now and I highly recommend the Kooks GESI cat setup coated as it keeps the smell down a lot, doesn't hamper power as we've tested them to 800whp thus far and the coating will help keep your under hood temps down too.

https://weaponxmotorsports.com/produ...=6311019511835

and paired with the Akrapovic is just ridiculous!

https://weaponxmotorsports.com/produ...ay-z06-lt1-lt4
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Old 03-06-2019, 03:17 PM
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Originally Posted by MustOBeenYellow2015Z View Post
Thanks for chiming in, are you running the big daddies foulers to get rid of the check engine light?
Have not used them. CEL is on right now.

Originally Posted by JohnCarlson View Post
When I first dynoed the car, I was getting a big loss of timing at 4.5k rpm, and it was leveling out after that. That was on 91, and if I recall, I ran 609hp at the wheels. I used 100 at the track and didnít notice a difference in power, I believe that the 100 recommendation for track usage is simply gem tryjng to stave off knock at high temps. I try to run a mix of 91 and 100 whenever I find myself near the only 100 pump within 100 miles. Iíd prefer to not run cats but the car is mainly a street car.
There is loss in the mid range on our ZR1 due to COTP (Cat-Over Temp Protection), AFR goes pretty rich and comes back in but there is no timing loss. With this occurring on 93, 91 with timing loss and cotp sounds like real hit. The gradual, low to high (but still low) timing holds the Z back as is. Cannot complain though, the power is nice and linear pretty consistently.

Right on about 100oct... has not shown any increase power but is worth running at least a mix if you do the headers/xpipe. Expect gains either way, but on 91 the power limit with mods is maybe ~630s, same dyno. Cant honestly see results being under 650 on 93/mix. Speculation of course, but if you do the mods share the data!
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Old 03-06-2019, 04:43 PM
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Originally Posted by HorsePowerAddicts View Post
Have not used them. CEL is on right now.



There is loss in the mid range on our ZR1 due to COTP (Cat-Over Temp Protection), AFR goes pretty rich and comes back in but there is no timing loss. With this occurring on 93, 91 with timing loss and cotp sounds like real hit. The gradual, low to high (but still low) timing holds the Z back as is. Cannot complain though, the power is nice and linear pretty consistently.

Right on about 100oct... has not shown any increase power but is worth running at least a mix if you do the headers/xpipe. Expect gains either way, but on 91 the power limit with mods is maybe ~630s, same dyno. Cant honestly see results being under 650 on 93/mix. Speculation of course, but if you do the mods share the data!
definitely, perfectly said. Is the COTP built within the ecu? And if I do, do the headers Iíll try the big daddies o2, to see if it negates at least some of the CELs. No harm in trying. The local shop who Iím having do the install talked about charging me 1k for a tune after the install, so either they are bullshitting me or they are ECU wizards and have cracked it😂😂
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Old 03-07-2019, 12:33 PM
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Originally Posted by JohnCarlson View Post
definitely, perfectly said. Is the COTP built within the ecu? And if I do, do the headers Iíll try the big daddies o2, to see if it negates at least some of the CELs. No harm in trying. The local shop who Iím having do the install talked about charging me 1k for a tune after the install, so either they are bullshitting me or they are ECU wizards and have cracked it😂😂
It is in there. COTP is simply a calculation made based on parameters, not based on a temp sensor directly in them or anything. With tuning access, temp range can be adjusted... typically its turned off completely when tuning/ modding begins. Dyno time and power verification charge seems reasonable, not a tune charge.
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