Final Dyno Results

So I finally have the bike back on the road, and after riding the HP4 for a month, it feels like a beast, absolutely feral. An angry machine gun of a bike with a hair trigger! So fast and loud now it's stupid. Did I forget or has it become even more of an animal with the extra HP and 41T conversion!

Just scanning the dyno sheets.

A plea for order

Before I post could I ask that anyone either directly associated with or working for AR refrain from posting on this thread in the interests of maintaining order. Its only a request and of course you are free to do what you like

So the main aim of this next dyno session was to try and remove the dip in the power curve that appears to be associated with the baffles. However, we have been unable to do this, which we assume is due to the baffle, and whether it was left or right side it made no difference - that was a dead end.

However we have found gains significant gains over 7,500rpm. Great credit to ProTwin for persevering with the tune and generating a great result.

The power feels phenomenal at any throttle, but compared to the BM it feels like a hair trigger - something I'm assuming I will get used to again!

The numbers...

Excluding the power run at Bunbury Dyno (which runs higher numbers) the following results were achieved on the ProTwin dyno using Tuneboy software.

Test day 1: 168HP - no baffle, no tune
Test day 2: 175HP - 1 baffle (left), tuned
Test day 3: 182HP - 1 baffle (right), additional tuning

Between 5-7,500 the untuned AR bolt-on with no baffle has an advantage.Over 7,500rpm we now have between 10-14HP more than the bolt-on state, and we have 10HP more than the Termi Slips.

Clearly at Bunbury Dyno the numbers would be 195HP+ but I can't be ...... to trek down there again as I now know the differential between the two dynos.

I have a dyno chart with the Termi Full system as well, just scanning.

WAfatboy said:

Before I post could I ask that anyone either directly associated with or working for AR refrain from posting on this thread in the interests of maintaining order. Its only a request and of course you are free to do what you like

Click to expand...

I'd think that they would be at least half of your concern.

Glad to hear that you're enjoying your bike.

WA, the additional tuning, it appears that the most optimal output is with the left baffle removed. Is that right? Or in other words, the output would be less if the left baffle remained regardless of the additional tuning on day 3. Yes? Curious is all, perhaps the clarity helps someone else.

Thanks in advance,

Performance vs Termi Full System & Slips

So in relation to my Termi slips, although I haven't got the direct dyno comparison chart the peak numbers look like this:

Termi Slips: 172HP (upmap)
Full Termi: 176HP (tuned)
AR: 182HP (tuned)

There's not a lot in it over the rev range. The AR starts to make more power at about 8,500 over the Termi. Its worth remembering that the Full Termi equipped bike has less than 1500km whereas my bike as 13,000km+.

Sorry about the tiny pics, this site's file upload is ........!

oalvarez said:

WA, the additional tuning, it appears that the most optimal output is with the left baffle removed. Is that right? Or in other words, the output would be less if the left baffle remained regardless of the additional tuning on day 3. Yes? Curious is all, perhaps the clarity helps someone else.

Thanks in advance,

Click to expand...

The first day was untuned, no baffles. Couldn't ride it with no baffles, way too loud even for a fan of loud pipes.

The pipe was tuned in the 2nd & 3rd day with ONE baffle.

When we tuned second time the baffle was on the left (following instructions from AR). Then it was suggested that the baffle should be run on the right, which we did on the 3rd day but it made no difference.

Hope that helps clarify.

WAfatboy said:

So in relation to my Termi slips, although I haven't got the direct dyno comparison chart the peak numbers look like this:

Termi Slips: 172HP (upmap)
Full Termi: 176HP (tuned)
AR: 182HP (tuned)

There's not a lot in it over the rev range. The AR starts to make more power at about 8,500 over the Termi. Its worth remembering that the Full Termi equipped bike has less than 1500km whereas my bike as 13,000km+.

Click to expand...

Thanks for posting Waf!! Were the termi systems on your bike?

ttkarp said:

Thanks for posting Waf!! Were the termi systems on your bike?

Click to expand...

The Slips were on my bike originally, the Termi Full system is on the other race bike that dyno'd back to back with in the very first thread of the Install.

Yes, thanks, WA . The improved output of the third day was ultimately achieved by the additional tuning, irrespective of the baffles.

That bike has got to be a lot of fun to ride at this point.

Great numbers and glad you got there in the end. I'd love to run one baffle but no way here in the UK.

Great numbers. Thanks!

For those interested in the 'dip' and how it could be overcome, the design of the splitter is a possible point of improvement according to the guys at ProTwin.

The AR pipe joins the two-one with one of the pipe making a clean entry into the single section but one of them comes in at a right angle and the flow hits the side of the pipe and could go either way (IMG 1154).

They showed a protoype splitter that brought them both in downwards (IMG 1157). You can compare the two below. The prototype uses a huge pipe and they are working on a reduced diameter version - its a canon at the moment.

They also noted that its insanely loud and the tech behind the muffler is the hardest thing for them to create.

WAfatboy said:

For those interested in the 'dip' and how it could be overcome, the design of the splitter is a possible point of improvement according to the guys at ProTwin.

The AR pipe joins the two-one with one of the pipe making a clean entry into the single section but one of them comes in at a right angle and the flow hits the side of the pipe and could go either way (IMG 1154).

They showed a protoype splitter that brought them both in downwards (IMG 1157). You can compare the two below. The prototype uses a huge pipe and they are working on a reduced diameter version - its a canon at the moment.

They also noted that its insanely loud and the tech behind the muffler is the hardest thing for them to create.

Click to expand...

Are you gonna be the test subject?

ttkarp said:

Are you gonna be the test subject?

Click to expand...

LOL



thanks for the info.

WAF -
so would you say it was "worth it" ???

So if you just slap the pipe on, it is worse than the slips. Is the summary of the tuning dumping a lot more fuel throughout the range?

ttkarp said:

Are you gonna be the test subject?

Click to expand...

Nope they have a customer race bike they are working with!

Phil said:

LOL



thanks for the info.

WAF -
so would you say it was "worth it" ???

Click to expand...

Was it 'worth it'? Couple of answers:

A) Let's suppose we hadn't had this stoush, the pipe hadn't broken and I hadn't been called a two-faced back-stabber by the vendor...and remember that I was always going to spend the money on tuning....

....I have an exhaust that makes 10RWHP more than my Slips, is marginally more powerful than the average Termi Full system, sounds and looks great in my eyes and reduces the weight of the bike by 6kg....

...so yes on that basis it was....but we did have a big stoush, the pipe did break, I was called a two-faced back stabber by the vendor so it's not quite as clear cut in my head.

B) If I look at how close the Termi Full system is to AR in my chart, had you shown me that originally then the decision would have been a lot closer and ultimately would have been based on looks, sound and whether I cared about voiding my warranty. Without the 'insane power' and 'massive gains' the AR proposition would have looked more 'show than go', and without the heritage and reputation of Termi.

Tough one but I'm delighted to have the bike back and the track will be the judge tomorrow

Trauma said:

So if you just slap the pipe on, it is worse than the slips. Is the summary of the tuning dumping a lot more fuel throughout the range?

Click to expand...

Yes, with no tune it was worse than slips. I will try and get the fuelling graph but I don't believe so.

Just for perspective. When I installed the D&D Lowcat on my Harley I shelled out $850 for a power commander V + Autotune, plus another $600+ in dyno time and I picked up 7 RWHP. Thus far I have spent about $900 on dyno time. (However the harley pipe only cost $900 )