A little wot video of my Z !! - Page 2 - ZR-1 Net Registry Forums

Paul Workman · 06-29-2015

We loved it!

Ami calls them "victims", and would hammer the Turq Monster just like that, given the chance!

5ABI VT · 06-30-2015

Heres an old video my friend made with his android phone .. you can hear the sound while decelerating.. no popping at all

https://www.youtube.com/watch?v=gSfP1PJI304

And heres a short clip from the other day of the snap crackle and pop..
https://www.youtube.com/watch?v=M8AnmlUNxNU

XfireZ51 · 06-30-2015

The snap,crackle, pop comes from excess fuel being mixed w fresh air sucked into the exhaust due to the high vacuum created on decel. Ever see any ricer with a "fart can" that isn't completely BLAAAAACCCK from the soot of too rich a mixture?

5ABI VT · 06-30-2015

My tips don't blacken much at all but from what I know and can google.. that's the cause as you mentioned. Theres a dramatic difference from the first video though.. none at all.. and just excessive in the re-tune after the top end porting/secondary elimination

XfireZ51 · 06-30-2015

Eliminating secondaries really doesn't have anything to do with it. On decel, the throttle is closed and secondary injectors are shut off. What happens is that with the changes, the fuel map needs to be modified. I have no secondaries, ported heads, more aggressive cams, headers blah blah blah. No gurgling.

KILLSHOTS · 06-30-2015

If all you have is "popping" on decel, then it's probably not an issue with Marc forgetting to enable that feature. Mine was BACKFIRING!!!! I mean, pretty much every time I depressed the clutch pedal (even on slow 1-2 upshifts) the car sounded like it was going to explode. Popping on decel is just your low-restriction exhaust...my stock Stingray even does that when I have the valves open.

Fully Vetted · 07-02-2015

Quote:

Originally Posted by 5ABI VT

My tips don't blacken much at all but from what I know and can google.. that's the cause as you mentioned. Theres a dramatic difference from the first video though.. none at all.. and just excessive in the re-tune after the top end porting/secondary elimination

You can see my mods in my sig (no cats). I don't have much popping but I def have dark tips.

5ABI VT · 07-02-2015

Quote:

Originally Posted by We Gone

I was having some backfire on rapid deceleration and it was having a hard time stabilizing rpms at the same time, and some lag in light throttle response. I have a scanner that I can watch and capture data. What I saw was the right 02 was reacting very slow and not cross counting as fast as the left and the numbers were off compared the the other. I replaced both 02's got them from Jerry's car runs great now.

Let me add I still have secondary's and high flow cats this was on my 91.

Which o2s did you go with ? Wondering if people on this forum prefer a Bosch or denso (I'm a denso fan personally) or ac delco etc?

Quote:

Originally Posted by WydGlydJim

One of my favorite Zs!.........

little WOT in the white beast..

https://www.youtube.com/watch?v=xCAT4uEiQzM

https://www.youtube.com/watch?v=VQgkV0D1NCo

That's a beast !! Man I love the white Zs

5ABI VT · 06-30-2015

I hear you but play the first video I linked when I posted 2 just above.. That was with the same exhaust setup. Absolutely ZERO popping at any speed. The only changes since have been ported top end and secondary system eliminated. That's all. And now there is a lot of snap crackle and pop all the time. The only other thing that was changed was the chip was revised for secondary elimination and porting.

Paul Workman · 07-01-2015

My Z is a mixed bag. It is fully ported, etc (see signature at bottom) and on hilly terrain (e.g., "the Dragon's Tail") on some decel stretches I'd get popping, etc. But, on others It would stall out until I blipped the throttle and it would "be nice" for a while. Probably needs to have hands "laid" on (the chip) at some point. Runs like a scalded dog, otherwise!

06-29-2015	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: A little wot video of my Z !! We loved it! Ami calls them "victims", and would hammer the Turq Monster just like that, given the chance!

06-30-2015	#2
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 780	Re: A little wot video of my Z !! Heres an old video my friend made with his android phone .. you can hear the sound while decelerating.. no popping at all https://www.youtube.com/watch?v=gSfP1PJI304 And heres a short clip from the other day of the snap crackle and pop.. https://www.youtube.com/watch?v=M8AnmlUNxNU

06-30-2015	#3
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: A little wot video of my Z !! The snap,crackle, pop comes from excess fuel being mixed w fresh air sucked into the exhaust due to the high vacuum created on decel. Ever see any ricer with a "fart can" that isn't completely BLAAAAACCCK from the soot of too rich a mixture?

06-30-2015	#4
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 780	Re: A little wot video of my Z !! My tips don't blacken much at all but from what I know and can google.. that's the cause as you mentioned. Theres a dramatic difference from the first video though.. none at all.. and just excessive in the re-tune after the top end porting/secondary elimination

06-30-2015	#5
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: A little wot video of my Z !! Eliminating secondaries really doesn't have anything to do with it. On decel, the throttle is closed and secondary injectors are shut off. What happens is that with the changes, the fuel map needs to be modified. I have no secondaries, ported heads, more aggressive cams, headers blah blah blah. No gurgling.

06-30-2015	#6
KILLSHOTS Join Date: Feb 2014 Location: AZ Posts: 857	Re: A little wot video of my Z !! If all you have is "popping" on decel, then it's probably not an issue with Marc forgetting to enable that feature. Mine was BACKFIRING!!!! I mean, pretty much every time I depressed the clutch pedal (even on slow 1-2 upshifts) the car sounded like it was going to explode. Popping on decel is just your low-restriction exhaust...my stock Stingray even does that when I have the valves open. Last edited by KILLSHOTS; 06-30-2015 at 08:04 PM.

07-01-2015	#10
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: A little wot video of my Z !! My Z is a mixed bag. It is fully ported, etc (see signature at bottom) and on hilly terrain (e.g., "the Dragon's Tail") on some decel stretches I'd get popping, etc. But, on others It would stall out until I blipped the throttle and it would "be nice" for a while. Probably needs to have hands "laid" on (the chip) at some point. Runs like a scalded dog, otherwise!