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[tunedse2]

Has anyone had V&H Big Radius race tuned, and if so did the popping on decel lessen or go away
after the tune was done?

[SPIDERMAN]

Brand and make are not the key to this. The popping is caused by cold air rushing back up the pipe when you let off the throttle. It is not as bad on a two into one system as a two into two and certainly the worst is the stock head pipes with crossover. There is no way to "tune" this out of any exhaust system. It is simply a factor of the reversion effect of cold air hitting warm exhaust gases in the pipes. If it annoys you, you can lessen it by avoiding rapid deceleration and excessive downshifting. Other than that, don't worry about it.

[BLM777]

Has anyone had V&H Big Radius race tuned, and if so did the popping on decel lessen or go away
after the tune was done?

With the dyno numbers that you're reporting in your profile, it's likely that you are experiencing an "over-lean" situation.  If the bike has not been on the dyno since you installed the Big Radius pipes it would be worthwhile to run it with a close eye on the AF mixture.  My bet would be with the change in pipes that you are somewhere around 14.5 or higher at low RPM's and 16 or so in the high mid to top range to have the popping occur after exhaust change.  It takes very little to significantly change the AF on these motors.  Too lean = higher dyno numbers, overheating and burned valves.  

[SPIDERMAN]

[highlight]popping on decel lessen[/highlight]

nuff said

[tunedse2]

I just got off the phone with V&H tech support who basicly said the HD race tuner is worthless
with their pipes.. and that I should buy either a Power Commander or their fuel Pak system.
They claim their system will run perfect... Here we go again..

[tunedse2]

With the dyno numbers that you're reporting in your profile, it's likely that you are experiencing an "over-lean" situation.

[Twolanerider]

BLM- I just got it back from being on the Dyno, the Dealer claims this is as good as it gets

Sounds as if it's time to find a dyno tuner who is actually talented at what he does.

[JCZ]

I just got off the phone with V&H tech support who basicly said the HD race tuner is worthless
with their pipes.. and that I should buy either a Power Commander or their fuel Pak system.
They claim their system will run perfect... Here we go again..

That's an interesting comment from V&H.

[tunedse2]

Twolane, I thought I had, this is the 3rd one in 3 months... thanks

[Twolanerider]

Twolane, I thought I had, this is the 3rd one in 3 months... thanks

Tuned, it might never work out.  But just in case check out the Events Schedule of this guy: http://www.rollingthunderdyno.com/


His name is John Golden and he works as Rolling Thunder Dyno.  Each rally season he works all over the east.  Right now the schedule only shows the big FL or Myrtle Beach events.  But he'll fill in others.  If you happen to be within range of where he'll be some weekend John truly is an artist at this stuff.  Good luck.

[BLM777]

BLM- I just got it back from being on the Dyno, the Dealer claims this is as good as it gets

If you can, post your last dyno sheet after the install of the new exhaust.

[grc]

tuned,

One thing that hasn't been mentioned but should be checked is air leaks at the pipe to head joint.

[SPIDERMAN]

[highlight]s name is John Golden and he works as Rolling Thunder Dyno. [/highlight]

IMHO  THE BEST tuner I've ever seem  Bar None !  

[PCC]

IMHO, the popping on decel means there is probably some fuel coming in at zero throttle in fuel map matrix.

[BLM777]

Exactly PCC.....wrong AF all the way around with a dipchit advising that a RT won't work with V&H pipes, when it's a tuner that can be used to adjust the decel fuel supply.   Way to easy for people to say it "has to pop".  BS