SavedByFaith_
Well-Known Member
- Thread starter
- #1
Hello all!
I have some questions for those gearheads / tuners.
The Z is my first Car that I'll be modifying to this degree, I've always been interested in Tuner / Modded cars with some friends having done mods to their cars and always in general interest of reading / watching up on this stuff. But when it comes down to the finer details and the mechanics of it all, I'm lackluster. So i'm here with a few questions.
Intent & Objective:
My number one intent with modding (at this time) is for Sound. I want the Z to sound as it looks, as it should. I find the car is very lackluster in sound... Whether it's Standard or Sport mode, you really don't hear anything until around 4-4.5k RPM, and even at that it's mediocre carrying into the 6-6.5k RPM.
I'm not looking to "be that guy" ripping a fart machine down the road - but am looking for a deeper and more thorough growl / roar in the low and higher RPMs.
My Proposed Solution:
After watching the reviews, and multiple other videos, my understanding is that the full downpipe is a bottle neck on the whole exhaust flow and in turn the Sound. The small pipe (1.25in or something like that) paired with the two catalytic converters on the upper & lower pipe seem to really restrict the exhaust flow. Of course, the piping in the exhaust mid and axle aren't any better with a similar 1.25in pipe.
So I figured, let's swap it out - this is when I bought myself the full single Catted (GESI OBD2 Sport [Gen-1, 300 Cell Count]) MAP downpipe paired with the MAP full Cat-Back Exhaust.
The Dilemma:
I got my mechanic / garage booking for early next week and as I've gotten closer to the date, I'm crossing my t's and dotting my i's and getting a little nervous.
a) Check-Engine Light.... I understand that this is very possible of happening as the second cat off the lower downpipe will be removed. I believe this is used to check "cold-start emission? and/or readiness / inspection testing?" and failing this test will throw a CEL.
I'm thinking and reading that an O2 Spacer (Spark Plug Defouler) may help in avoiding this CEL - anyone have thoughts with this?
b) Negative Repercussions on the Drivetrain..... I'm reading that with a stock tune and upgraded turbo back pipe diameter will cause "wastegate / back pressure".
I'm not entirely sure what all this is about, but can sort of understand what is happening and how the ECU (although smart) may not be able to auto-correct / adjust the "metrics" to account for the increased flow of the entire turbo back.
Is this true? will there be negative repercussions if running a full turbo back with a stock tune?
I totally understand how a tune (I'd be looking into ECUTek from Panda, Z1 or AAM) would "adjust" this and correct the metrics for the fuel and all that fancy stuff to obviously make the best of the turbo back but also ensure all the mechanics are running smooth and avoid any "harm".
c) Warranty Shenanigans.... I totally understand that if I mess with the downpipes and give it a ECUTek Tune, I'm certainly blowing away any and all my warranty - pretty much blacklisting myself.... (even if it's jsut full pipes and no tune)
In general, would love to hear from folks about this and their experience / stories.
In contrast, my bare minimum plan is to solely install the MAP CBE and leave the stock downpipe - would love to hear form anyone who just had a CBE and warranty / dealer service stories (I'm guessing I'd still be flagged, but maybe some more wiggle room to hold "part" of the warranty?)
Final Thoughts:
I stated how I want Sound above all else at this point with the Z - this is certainly true, although I do have aspirations to further mod it with the items mentioned above and more.
Just after spending nearly two weeks with the Car, it changed my perspective a little right... Care for her, want to have her forever and minimize my maintenance and risk with her for the time-being, while still being able to fully enjoy her with each drive. Perspectives change... before having the car, I was totally down for all this and risk the warranties and manufacturer's role in the early life of the car. But now, having her in my hands, I want her to be in the best condition; the thought of her having some problems due to the manufacture and myself throwing out the warranty has me in this dilemma.
All in all, I know there isn't a clear-cut decision and it's based on my personal risk tolerance - just looking to hear some opinions and more importantly the mechanical facts of the mods and their possible combo outcomes.
Thanks!
I have some questions for those gearheads / tuners.
The Z is my first Car that I'll be modifying to this degree, I've always been interested in Tuner / Modded cars with some friends having done mods to their cars and always in general interest of reading / watching up on this stuff. But when it comes down to the finer details and the mechanics of it all, I'm lackluster. So i'm here with a few questions.
Intent & Objective:
My number one intent with modding (at this time) is for Sound. I want the Z to sound as it looks, as it should. I find the car is very lackluster in sound... Whether it's Standard or Sport mode, you really don't hear anything until around 4-4.5k RPM, and even at that it's mediocre carrying into the 6-6.5k RPM.
I'm not looking to "be that guy" ripping a fart machine down the road - but am looking for a deeper and more thorough growl / roar in the low and higher RPMs.
My Proposed Solution:
After watching the reviews, and multiple other videos, my understanding is that the full downpipe is a bottle neck on the whole exhaust flow and in turn the Sound. The small pipe (1.25in or something like that) paired with the two catalytic converters on the upper & lower pipe seem to really restrict the exhaust flow. Of course, the piping in the exhaust mid and axle aren't any better with a similar 1.25in pipe.
So I figured, let's swap it out - this is when I bought myself the full single Catted (GESI OBD2 Sport [Gen-1, 300 Cell Count]) MAP downpipe paired with the MAP full Cat-Back Exhaust.
The Dilemma:
I got my mechanic / garage booking for early next week and as I've gotten closer to the date, I'm crossing my t's and dotting my i's and getting a little nervous.
a) Check-Engine Light.... I understand that this is very possible of happening as the second cat off the lower downpipe will be removed. I believe this is used to check "cold-start emission? and/or readiness / inspection testing?" and failing this test will throw a CEL.
I'm thinking and reading that an O2 Spacer (Spark Plug Defouler) may help in avoiding this CEL - anyone have thoughts with this?
b) Negative Repercussions on the Drivetrain..... I'm reading that with a stock tune and upgraded turbo back pipe diameter will cause "wastegate / back pressure".
I'm not entirely sure what all this is about, but can sort of understand what is happening and how the ECU (although smart) may not be able to auto-correct / adjust the "metrics" to account for the increased flow of the entire turbo back.
Is this true? will there be negative repercussions if running a full turbo back with a stock tune?
I totally understand how a tune (I'd be looking into ECUTek from Panda, Z1 or AAM) would "adjust" this and correct the metrics for the fuel and all that fancy stuff to obviously make the best of the turbo back but also ensure all the mechanics are running smooth and avoid any "harm".
c) Warranty Shenanigans.... I totally understand that if I mess with the downpipes and give it a ECUTek Tune, I'm certainly blowing away any and all my warranty - pretty much blacklisting myself.... (even if it's jsut full pipes and no tune)
In general, would love to hear from folks about this and their experience / stories.
In contrast, my bare minimum plan is to solely install the MAP CBE and leave the stock downpipe - would love to hear form anyone who just had a CBE and warranty / dealer service stories (I'm guessing I'd still be flagged, but maybe some more wiggle room to hold "part" of the warranty?)
Final Thoughts:
I stated how I want Sound above all else at this point with the Z - this is certainly true, although I do have aspirations to further mod it with the items mentioned above and more.
Just after spending nearly two weeks with the Car, it changed my perspective a little right... Care for her, want to have her forever and minimize my maintenance and risk with her for the time-being, while still being able to fully enjoy her with each drive. Perspectives change... before having the car, I was totally down for all this and risk the warranties and manufacturer's role in the early life of the car. But now, having her in my hands, I want her to be in the best condition; the thought of her having some problems due to the manufacture and myself throwing out the warranty has me in this dilemma.
All in all, I know there isn't a clear-cut decision and it's based on my personal risk tolerance - just looking to hear some opinions and more importantly the mechanical facts of the mods and their possible combo outcomes.
Thanks!