AR exhaust: my experience so far

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I was watching the development of the AR exhaust for many months and even before they had finalised the design I had decided I was going to get one when they became available. Mostly because I thought it looked the best and was a little unique too (not just another termi boy).

I was initially going to run the pipes without the Rapid Bike but decided to buy the RB Race module.

Did the install myself, took me around 5 hours cause I like to take my time.
It is well made and is clear how much time and effort has gone into getting this perfected from AR.

I wasn't too happy with the fuelling especially down low and after reading the tuning threads I realised the RB wasn't up to the task, this pipe changed the dynamic of this bike so much that It required more than the RB could provide.

A fellow forum member got me in touch with the owner of Tune Boy and I spent a whole day with him at his workshop. We did multiple runs on his dyno with the RB set up and the data had revealed why the bike was running so badly as already posted by wmcdonald in WAF's thread. Without hesitation I began to undo the 4 hour RB install (how long it took for me to get it on) and allow Tuneboy to reflash the stock ecu.

The results were very pleasing. Peak power when compared to the RB was insignificant (3hp gain) however my AF ratios are spot on right through the range and we even amended the throttle openings from factory spec to provide maximum HP throughout.

I was able to see 190HP on the dyno which I was also very happy about.

I got in touch with Rich from AR who has always been great to deal with (one of the best in my experience) and he agreed to refund my RB module less a small restocking fee which I was more than happy with... Thanks Rich!

The only slight concern I have is the HP & TQ drop in the midrange as seen in the attached pics. I'm going to spend some more time with Wayne shortly and try to get that area improved so watch this space.

I should have dyno'd with the stock cans on first though because I don't really know if it is better or worse especially given the results that WAfatboy had experienced.

What is really interesting is that I was able to compare my dyno graph against two other bikes that Wayne had run on the same dyno a few days before mine.

Here is my bike compared to the S1000RR and ZX10R
Pani is the Red line.
ZX10R is the green line obviously... :)
ZX10R and S1000RR both have STD pipes, ZX10R had been tuned by ECU
flashing with TB software, S1000RR had PCV and no other adjustments.

One graph is HP the other is Torque.
I think it is good to have these two bikes on the graph as they put they not only put the power drop into perspective but also how the Pani is superior everywhere else.

I will keep you updated after we tackle the midrange with Wayne, stay tuned!
 

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  • AR_vs_S1000_vs_ZX10R_TQ.jpg
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I dig it. The torque difference between the other two bikes and the Pani is crazy. But that midrange dip is very concerning. I wish you guys well during the quest to rectify it.
 
Given the mods, shouldn't the BMW be making a bit more than the zx-10R?

S1000 is making almost 20 HP more than the ZX-10 in certain parts of the power band. I'd say that is substantial...

And also, no idea what year S1000 this is. We know how much stronger the new ones are.
 
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I dig it. The torque difference between the other two bikes and the Pani is crazy. But that midrange dip is very concerning. I wish you guys well during the quest to rectify it.
I read somewhere that the drop was due to the bend in the rear header and that the Zard and QuatD systems don't have this problem? :confused:

Here are charts pulled from the Bellissimota/Zard/QuatD web pages showing the removal of the dip: FYI, sorry about the image size. It's not me; it's a direct link to the Bellissimot web page. :)
Curva.jpg

QD_1199-3.JPG
 
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I read somewhere that the drop was due to the bend in the rear header and that the Zard and QuatD systems don't have this problem? :confused:

Or the use of baffles...
But we have to wait and see the outcome. Will let the final results dictate a conclusion.
 
Wow.. those are great numbers... such a pity we don't have apples to apples with the stock or slips or termi..... The s1000 looks really poor on here which given my real world experiences doesn't make sense..
 
I should have dyno'd with the stock cans on first though because I don't really know if it is better or worse especially given the results that WAfatboy had experienced.

It would have been ideal to compare a before dyno plot of your bike using the same dyno. It is nice to be able to quantify the differences objectively rather than rely on the "butt dyno".

RE: dyno numbers as a holy grail.
The Mustang dyno that I use to tune my car reads notoriously low. For example, 470 at the wheel (ATW) hp is equivalent to 550 ATW on another shops Dynojet. Since it is an awd platform there is about a 20% drivetrain loss, so 565 and 660 respectively at the crank hp. 100hp is a big variance between dyno results which doesn't concern me much since I compare each mod with the last result on the same dyno to see how the slope and peak was effected. This particular car stock will normally produce about 160 ATW hp on the same mustang dyno which is decent for a measly 2L four banger. Factory claim of 210 crank hp is therefore a touch optimistic but possible on a different dyno. Broken egos surround this mustang dyno when guys don't even hit factory numbers after mods!! :D

Looking forward to see you get that midrange dip sorted.

GL
 
I was watching the development of the AR exhaust for many months and even before they had finalised the design I had decided I was going to get one when they became available. Mostly because I thought it looked the best and was a little unique too (not just another termi boy).

I was initially going to run the pipes without the Rapid Bike but decided to buy the RB Race module.

Did the install myself, took me around 5 hours cause I like to take my time.
It is well made and is clear how much time and effort has gone into getting this perfected from AR.

I wasn't too happy with the fuelling especially down low and after reading the tuning threads I realised the RB wasn't up to the task, this pipe changed the dynamic of this bike so much that It required more than the RB could provide.

A fellow forum member got me in touch with the owner of Tune Boy and I spent a whole day with him at his workshop. We did multiple runs on his dyno with the RB set up and the data had revealed why the bike was running so badly as already posted by wmcdonald in WAF's thread. Without hesitation I began to undo the 4 hour RB install (how long it took for me to get it on) and allow Tuneboy to reflash the stock ecu.

The results were very pleasing. Peak power when compared to the RB was insignificant (3hp gain) however my AF ratios are spot on right through the range and we even amended the throttle openings from factory spec to provide maximum HP throughout.

I was able to see 190HP on the dyno which I was also very happy about.

I got in touch with Rich from AR who has always been great to deal with (one of the best in my experience) and he agreed to refund my RB module less a small restocking fee which I was more than happy with... Thanks Rich!

The only slight concern I have is the HP & TQ drop in the midrange as seen in the attached pics. I'm going to spend some more time with Wayne shortly and try to get that area improved so watch this space.

I should have dyno'd with the stock cans on first though because I don't really know if it is better or worse especially given the results that WAfatboy had experienced.

What is really interesting is that I was able to compare my dyno graph against two other bikes that Wayne had run on the same dyno a few days before mine.

Here is my bike compared to the S1000RR and ZX10R
Pani is the Red line.
ZX10R is the green line obviously... :)
ZX10R and S1000RR both have STD pipes, ZX10R had been tuned by ECU
flashing with TB software, S1000RR had PCV and no other adjustments.

One graph is HP the other is Torque.
I think it is good to have these two bikes on the graph as they put they not only put the power drop into perspective but also how the Pani is superior everywhere else.

I will keep you updated after we tackle the midrange with Wayne, stay tuned!

How do you give more than one thanks to a post :D..
I dig it..
 
ZARD is ALL ABOUT BACKPRESSURE and unfortunate looks as well as putting weight in less optimal area.

double dog are about to release Pani exhaust -- i'd wait for them...
 
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ZARD is ALL ABOUT BACKPRESSURE and unfortunate looks as well as putting weight in less optimal area.

double dog are about to release Pani exhaust -- i'd wait for them...

That's good news, although after reviewing their website (double dog), their current offerings are not too attractive.
 
Had a DD on my street fighter and my tuner was shocked by how bad the rear cylinder was scavenging. He had to run it way rich to compensate for the issue. I would not put stock in them coming up with anything amazing.

Re the original post. I think the mid range hole is a problem stock. Would love to see tuneboy solve that. I am still trying to find someone interested in tuning with the tuneboy software here in Los Angeles. If that happens I will do a run with my termi slip-ons before and after. I am also on the list for the AR group buy so will have a baseline with the termi's.

Whatever the case, I really only care about ride-ability at lower/mid rpm range. I ride some very technical roads/tracks and need to clean that up.
 
Had a DD on my street fighter and my tuner was shocked by how bad the rear cylinder was scavenging. He had to run it way rich to compensate for the issue. I would not put stock in them coming up with anything amazing.

Re the original post. I think the mid range hole is a problem stock. Would love to see tuneboy solve that. I am still trying to find someone interested in tuning with the tuneboy software here in Los Angeles. If that happens I will do a run with my termi slip-ons before and after. I am also on the list for the AR group buy so will have a baseline with the termi's.

Whatever the case, I really only care about ride-ability at lower/mid rpm range. I ride some very technical roads/tracks and need to clean that up.

Same here with regards to the track, was at a small technical track at the weekend with very few short straights and lots of kinks, hairpin and tight chicanes (with bumps). Tuneboy's got the mid-throttle position sorted so I was fine just trying to roll on and carry as much speed as possible in 3rd but found I wanted more power/torque when I wound it on hard out of the corners, especially the slower 2nd gear ones. Hard to say definitively as it was the fist time at the track so took it relatively cautiously. On the road the mid-throttle power is great, a lot less changing gears.
 
i keep watching the QuatD dyno video -- love it. just wish it looked decent, or that the Zard looked better. fortunately for me, i'm not a good enough racer to not already be blown afuckingway by the base 1199 with stock exhaust!
 
Nice informative post - Copiya...thanks!

But, the Zx10R and S1000RR were just on standard pipes but with reflashed ECUs and Power CommanderV. What if the S1000 and Zx10R were on full systems? Hmmmmm....nevertheless Pani is making good numbers...except for that dip in the middle.

Miguel
Philippines
 

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