How to get pops and crackles
#1
How to get pops and crackles
Just took delivery of a 16 R coupe. When I tested a 15, it seemed that the exhaust constantly popped and rumbled just by barely letting off the throttle or by downshifting. I could get some fairly tame crackles today, but only once or twice did I get a long run of crackles when I let off the gas. Granted, conditions were different today...much colder (30's)...the car was mine this time, so I probably ran the car harder than when the salesman was with me. The tester was a 15 model I think.
I had it in dynamic mode with the active exhaust on and the transmission in sports mode. Any advice on how to extract those long runs of pops and rumbles? Is there a specific gear, RPM, or whatever that does it best?
Thanks and happy to be a first time Jag owner.
I had it in dynamic mode with the active exhaust on and the transmission in sports mode. Any advice on how to extract those long runs of pops and rumbles? Is there a specific gear, RPM, or whatever that does it best?
Thanks and happy to be a first time Jag owner.
#4
During break-in, you won't get many. Once she is past 2,000 miles it will become more frequent. After 3,500 it seems to be as you might expect.
Might be the ECU keeping the new motor safe.
Also, try a non-sport move drive for 30 min, switch to sport mode at the end. Turn it off and go get a coffee or something (~5 min). When you start up and run again, she may be good to go.
Note - this is based in a V6S MT break-in.
Orkney
Might be the ECU keeping the new motor safe.
Also, try a non-sport move drive for 30 min, switch to sport mode at the end. Turn it off and go get a coffee or something (~5 min). When you start up and run again, she may be good to go.
Note - this is based in a V6S MT break-in.
Orkney
#5
During break-in, you won't get many. Once she is past 2,000 miles it will become more frequent. After 3,500 it seems to be as you might expect.
Might be the ECU keeping the new motor safe.
Also, try a non-sport move drive for 30 min, switch to sport mode at the end. Turn it off and go get a coffee or something (~5 min). When you start up and run again, she may be good to go.
Note - this is based in a V6S MT break-in.
Orkney
Might be the ECU keeping the new motor safe.
Also, try a non-sport move drive for 30 min, switch to sport mode at the end. Turn it off and go get a coffee or something (~5 min). When you start up and run again, she may be good to go.
Note - this is based in a V6S MT break-in.
Orkney
#7
Trending Topics
#8
#9
The "R" i've worked on down here will pop/crack just by blipping the throttle from idle with it in park.
You can get a real machine-gun series of cracks by giving throttle in 1st, and then shifting up manually simultaneously as you lift off the throttle.
With the exhaust open of course.
It's really obnoxious!
You can get a real machine-gun series of cracks by giving throttle in 1st, and then shifting up manually simultaneously as you lift off the throttle.
With the exhaust open of course.
It's really obnoxious!
#11
#12
The following 6 users liked this post by V8FTW:
AnD3rew (04-10-2016),
Jagged Wire (12-06-2017),
JagRag (12-06-2017),
Matttheboatman (04-23-2017),
Panthro (07-04-2016),
and 1 others liked this post.
#13
Mine used to crackle and pop in dynamic / sport with the merest hint of lift at even low engine rpm / speed - there was no need to rev it to 3k+ rpm. As reported in the other thread, that behavior changed post the O2 software flash.
So - give this a try. Put it in standard / sport mode. You should get a lot of crackles and pops at low speed / low rpm. Even better - standard / sport and go into manual mode via the paddles - a LOT of pops and crackles, again no need to be at 3+k rpm or to be travelling at speed. This now sounds like dynamic / sport used to for me prior to the software flash.
Give this a try and let us know the results - I am intrigued to see if your car exhibits this behavior.
So - give this a try. Put it in standard / sport mode. You should get a lot of crackles and pops at low speed / low rpm. Even better - standard / sport and go into manual mode via the paddles - a LOT of pops and crackles, again no need to be at 3+k rpm or to be travelling at speed. This now sounds like dynamic / sport used to for me prior to the software flash.
Give this a try and let us know the results - I am intrigued to see if your car exhibits this behavior.
#14
Add some sport cats... will do it all the time
__________________
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
#15
#16
The following 2 users liked this post by SinF:
BostonKiller (05-12-2016),
Cr33pin (04-28-2020)
#17
We can always use tuning to switch off.
__________________
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
#18
No. They did throw codes on the prototype part. We went with a larger 4" brick on the production parts, but I would expect them to be marginal. Probably will not throw codes most of the time, but some would experience transient or occasional codes. That's what it's like on the Astons.
We can always use tuning to switch off.
We can always use tuning to switch off.
#19
I didn't do any cell count measurements, but I'm pretty sure the stock cats have a 600 cell primary, then post-cat sensor, then a 400 cell secondary scrubber.
__________________
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
#20
And sorry - headers. My friend picked up his 2015 2WD R, wants to put a few kms on it to break in before we do anything too harsh like dyno it.
But I'm expecting it in the shop in the next 3-4 weeks.
But I'm expecting it in the shop in the next 3-4 weeks.
__________________
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com