Dyno Tune = Popping?
Outstanding HDF Member
Joined: Jun 2007
Posts: 2,687
Likes: 6
From: Kalaui Kona HI
RE: Dyno Tune = Decel Popping?
No backfire but apparent decel pop is evident when I let go of the throttle. I don't think my bike has ever backfired. The exhuast soot isrust color which means its running like it should. I think?
Road Warrior
Joined: Dec 2006
Posts: 1,900
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From: Backwoods of NH
RE: Dyno Tune = Decel Popping?
ORIGINAL: hd_sob
No, I don't mean backfire, I mean popping. As I suspected, it is becoming evident that popping is inevitable...
No, I don't mean backfire, I mean popping. As I suspected, it is becoming evident that popping is inevitable...
Had mine dyno'd last Fall and only rode it another few hundred miles before putting her away for the winter, but not only did I notice no backfiring but also no popping and a real nice "awake" sound out of the V&H short shots with quiet baffles. Also have SE Stage 1 intake with K&N filter and SERT. No engine mods and had just had my 1000 service with Syn3.
Tuner had my bike for a day and a half and worked on it for quite a while, letting it cool down between runs over the course of an afternoon and the next morning. I got (well, he got):
Max hp of 76 @ 4900 rpm
Max torque of 96 @ 2900 rpm
All A/F numbers below 14 with an ave. of 13.6
But not only did the guy work his magic (a well known engine tech at a local HD dealer), but they were running a Fall Dyno Special and I got it done for $135 flat fee!
When I took it in, I told him I was concerned about the popping and just wanted her to run well and could care less about the numbers. He smiled.
An hour and a half for a dyno tune does not seem like much time IMO. Each engine is different and just setting a bike to a prescribed bunch of settings from someone else's dyno tune may not be the best way to go about it. But I'm no expert.
Good Luck!
Outstanding HDF Member
Joined: Mar 2007
Posts: 2,167
Likes: 0
RE: Dyno Tune = Decel Popping?
ORIGINAL: hd_sob
No, I don't mean backfire, I mean popping. As I suspected, it is becoming evident that popping is inevitable...
No, I don't mean backfire, I mean popping. As I suspected, it is becoming evident that popping is inevitable...
I bypassed all that Sert and d/l crap and went straight to a Thundermax ecm and had it custom mapped by my indy guy. He tests all his maps out thouroughly on his Dyno beforehand until he gets just the right combination of air/fuel numbers. Bike has run like a champ since the day I picked it up. Maybe you might want to consider that avenue also.
Banned
Joined: Jan 2007
Posts: 4,144
Likes: 1
From:
RE: Dyno Tune = Decel Popping?
You just need to take it back and let him tweak it a little more .... He can fix that in a short time... He just needs to adjust a few tables.. It wont pop on Decel ...
ORIGINAL: hd_sob
No, I don't mean backfire, I mean popping. As I suspected, it is becoming evident that popping is inevitable...
No, I don't mean backfire, I mean popping. As I suspected, it is becoming evident that popping is inevitable...
Banned
Joined: Feb 2008
Posts: 498
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From:
RE: Dyno Tune = Decel Popping?
ORIGINAL: Trotter
You just need to take it back and let him tweak it a little more .... He can fix that in a short time... He just needs to adjust a few tables.. It wont pop on Decel ...
You just need to take it back and let him tweak it a little more .... He can fix that in a short time... He just needs to adjust a few tables.. It wont pop on Decel ...
Offhand, do you know where it's best to cut the fuel on decel then? I've a tmax with autotune on mine and have made adjustments myself for decel
Banned
Joined: Jan 2007
Posts: 4,144
Likes: 1
From:
RE: Dyno Tune = Decel Popping?
Nope..... never tryed to tune a autotune ..... But I get alot of bulletins on them... Look for other Issues if it's popping on decel or it's got a bad sensormaybe....? or it's just not working for your Application..
ORIGINAL: the metal
Offhand, do you know where it's best to cut the fuel on decel then? I've a tmax with autotune on mine and have made adjustments myself for decel
ORIGINAL: Trotter
You just need to take it back and let him tweak it a little more .... He can fix that in a short time... He just needs to adjust a few tables.. It wont pop on Decel ...
You just need to take it back and let him tweak it a little more .... He can fix that in a short time... He just needs to adjust a few tables.. It wont pop on Decel ...
Offhand, do you know where it's best to cut the fuel on decel then? I've a tmax with autotune on mine and have made adjustments myself for decel
Banned
Joined: Feb 2008
Posts: 498
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From:
RE: Dyno Tune = Decel Popping?
thanks for that reply man!
my scoot runs like a bat out of hell, I have no complaints
Just figured I would ask, not too concerned with bulletins, they are not uncommon with complicated devices such as an ecm, I know the product works as advertised.
my motor certainly doesn't sound like popcorn popping, or a balloon popping or anything me or my mechanic felt was a concern on decel, just a very strong gurgle that I thought had a small poppy
either way, I think I will turn off the cut fuel on decel and see what happens, if I think it's popping with no fuel on decel, then it should really POP with fuel eh.
my scoot runs like a bat out of hell, I have no complaints
Just figured I would ask, not too concerned with bulletins, they are not uncommon with complicated devices such as an ecm, I know the product works as advertised.
my motor certainly doesn't sound like popcorn popping, or a balloon popping or anything me or my mechanic felt was a concern on decel, just a very strong gurgle that I thought had a small poppy
either way, I think I will turn off the cut fuel on decel and see what happens, if I think it's popping with no fuel on decel, then it should really POP with fuel eh.
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Road Master
Joined: Mar 2006
Posts: 1,187
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From: DFW
RE: Dyno Tune = Decel Popping?
ORIGINAL: the metal
my scoot runs like a bat out of hell, I have no complaints
my scoot runs like a bat out of hell, I have no complaints