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Discussion Starter #1 (Edited)
Dyno curves are an ideal way to assess performance changes before and after mods. Hopefully the majority of owners understand that its not the actual output figures that matter but the percentage change between the curves. No two dynos or indeed dyno runs will produce identical figures and there is an incentive for unscrupulous operators to run high to get amazing headline figures.

So far I have seen the GSXS producing anything between 129 and 150 stock which is way beyond the power differences attributable to modern manufacturing tolerances which would change performance by 5hp at most. The other HP are probably accountable to bike set up and variation on tolerances and 'adjustments' in the dyno and its software.

Please stay on track and use this thread to post curves and mods only to share experience. numbers on their own are not what this thread is about, I don't care if you drilled a hole in the air box and your mate reckons its faster than his 185hp GSXR. Post a curve, or feel free to comment on results achieved. if you want to post anecdotal data or go off topic please just start a new thread!

To start the ball rolling his the chart from the Motorcycle.com review for a stock bike, plus a link to an article by Superbike with a power commander.
http://www.superbike.co.uk/blogs/suzuki-gsx-s1000-fuelling-graphs/
 

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Discussion Starter #2 (Edited)
Tried to get the link to work but failed miserably.

Hopefully the dyno chart for SuperBike is attached. This seems optomistic but shows a fair increases at the top end and throughout the rev range. Standard Bike with power commander.

Power freaks will read the peak figures and vertical difference (HP & Torque) between the curves. For road riders look along the RPM axis to see the same power arriving between 500 & 750 rpm earlier. The bike feels quicker - sooner.
 

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Discussion Starter #3
Third curve isd stolen from another Brit R1KSU earlier in this forum. Hopefully he will chip in with any errors mad by me. Woolwich ECU flash plus Decat pipe on an otherwise standard bike. an awesome set of figures which should have transformed how the bike felt performance wise. curve shows 140hp 1500rpm earlier than stock, 6th after the tune should pull like 5th before!
 

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Discussion Starter #5
Thanks Martin,



Really impressive before and after figures, I think you are understating the performance increase, looks like plus 20hp or more at 9000rpm and 12 ft lbs at 8800rpm.

Your tuned bike now make the same power at 8500 rpm that it did at 10250rpm, and hits 100bhp about 1000rpm earlier. Torque increased everywhere past 6000rpm and the tuned bike hits the original peak torque figure 1600 rpm sooner.

That should make a huge difference in real world conditions with better driveability and acceleration.

I am sure that someone will say your figures are low, take no notice if they do, probably down to dyno settings. Be good to see other results from Hilltop.
 

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Just a decat and standard end can 2016 model, Simon W posted it above, but its so small :)
 

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Woolwich Base flash with PCV custom map for K&N filter and stock exhaust. I now have an almost linear air / fuel delivery and the throttle snatch has completely gone, super smooth throttle and the power comes in completely predictable, smooth and constant, really happy with the results and have now re-installed the OEM throttle tube. More torque, increased HP, increased rev limit this is how the bike should have been from new if it wasn't for emission law.


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most people seem to get high 130's hp and in the 70's TQ stock so i am not sure where 124hp comes from. glad to hear it is improved though!!
 

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most people seem to get high 130's hp and in the 70's TQ stock so i am not sure where 124hp comes from. glad to hear it is improved though!!


Dynos trick people. Never look at the numbers since every dyno has a different setup and reads differently. Always only look at the percent difference in the graphs.


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ok, let me put it another way then. I have not seen any legitimate source claim gsxs hp gains, percentage or otherwise, such as lee's below, even with a full system.

I would suggest that as much as dyno's may "trick people", much more often, PEOPLE trick people, or try to anyway.
 

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Here's mine from earlier this year
There's something up with the image Guy it won't open in the forum page. I right clicked and downloaded it but it is too small to be legible only 3.0 kb.
 

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Discussion Starter #15
Nice one Guy, thanks for sharing.

Continual increases throughout the curve with impressive torque increases at 4500 and 7500rpm. It looks like your peak torque (an extra 7 ftlbs)now occurs 2000rpm earlier. likewise your original peak power figure is reached much earlier.

Seems that yours is one of the few that show an increase in maximum RPM pulling at least 200rpm more than stock.

Can you confirm the mods undertaken and let us know how the bike feels before and after.
 

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Discussion Starter #17
I always look for that too :)

The HP scales are on the Left with torque on the right with different scales.
 

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Simon ,it's got a full Yoshimura headers and collector with a R11 can. K&N filter in both cases baffles left in. Also fitted a pcv. I thought the mid range was impressive before going on the dyno to get custom mapping done on the pcv but now even bigger grin. When it was first run up it was a very weak fuel mixture. Next up is a healtec x-tre and baffles in air box and can removed and get it put back on the dyno to see if there's any gains other than noise increase. That's for the spring time.
 

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Here's mine with full M4 exhaust, bmc race filter, and PCV with tune. The first pull was with just the M4. After tuning and fitting the PCV and filter those are the final results. Still need to spend some more time on dyno to fix AFR in lower rpms. Overall the difference is noticeable. Certainly feels more torquey down low but the biggest difference is sound! Wife is not a fan...
 

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Discussion Starter #20 (Edited)
Beginning to see a pattern emerging here. The GSXS gets useful gains everywhere with the biggest increase in both power and torque around 7000 rpm so very noticeable on the road. Its a genuine case of tuning increasing flexibility, just look at the increased area under the curves.

Torque increases are really impressive with more torque at just 4.5k than the original peak figure.

As expected are lots of variations on Dynos, some stop abruptly at 10.5k with others running to almost 12k.

An interesting feature of the GSXS engine is its extremely flat rise to peak power, it taking about 2k revs to gain the final 3 or 4 hp. this gives a useful range where the bikes full power is available in any gear. I would suggest that is due to the reworked cams fitted.

Keep the curves coming folks
 
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