@ Joel

Hey,
I had tried the bike done by Prabhakar for one whole day. Ripped it like crazy! Did some crazy drags on it!
I feel that on stock fuelling the power bump with the exhaust wasnt noticeable much & there were lots of backfires. With a better tune the bike was performing way better! The bike was revving much better than before. It had an awesome mid-range power. Much better than P220 FI. At higher rpms there was considerable loss of power which could be felt. If upjetted, to say 150mm+ main jet, i feel much more power can be generated at high revs.
But did not try it much after the final tuning. So no comments on the final product.

+10000 for the exhaust.. A MUST buy for every crazy revver!!!

PS- What about my fire spitting exhaust?

@ joel

will we be seeing any dyno-charts comparing the original power curves to the modified ones ????

tere mooh meh ghi shakar !!! (if u understand it) lol ! waitin for the pics

@diehard - The installation of the pipe is a simple DIY job. Nothing rocket science.
I just finished my first prototype today. Will do a final finish and post the pics.

I mentioned in the post to refer my earlier posts.
Sorry I did not mention which posts they are.
They are in 3rd page 32nd post & some 35th post.
There I mentioned all the changes made.
Yes there was a change in the gearing too for achieving the above speeds.

yes this makes a lot of sense , so when is the prototype ready ?? with all the aesthetics ?????? and will u install it if v are in bangalore ?? so many questions ! sorry mate my patience is a tad run out

Yes, that makes it so clear!
Improving the volumetric efficiency of an engine will enhance the throttle response and proportionally improve the fuel efficiency as well.
Gearing is a variable which transmits the torque to the wheel. If the gearing is kept constant, there will not be any change in the rpm v/s speed.

You cannot change the RPM to speed ratio without altering your gearbox.

Yes, it is possible that since it is developing more power due to better combustion, you will have to use less throttle to accelerate to that speed and hence possibly reduce the fuel consumed. And for the same reason it is possible that it requires less fuel to maintain that speed (again, due to better combustion). But you cannot get higher speed from the same RPM just by tuning.

I would like to add something about the Fuel efficiency part.
If the Tuning is Right then The Fuel efficiency wont drop.
As a matter of fact it increases for the same kind of riding.
To elaborate a simple example -
If the Bike does 80kmph in fifth gear at 6000 rpm before the tuning consuming 1 litre of petrol for 37kms then after tuning it does 80kmph at 5700 rpm consuming 1 litre to travel around 39kms ( It does 89kmph at 6000 rpm).
The Stock 220 was giving 35-36 with speeds upto 120.
After the tuning (Read all the changes in my earlier post) it was giving around 37-38 for similar speeds.
Reason - U need to ride at a lower RPM for the same speed.
However the moment we hear the sweet sound of the Exhaust we tend to rip it harder than normal which results in lesser Fuel efficiency.
SO its not the machine which makes the FE lower, But its we who make it lower.
The bike now burns the fuel better than before due to the tuning.

^+1

Right Said!

If its exhausts that are being talked about here, I should be able to add to it. Joel did my Fiero and left the exhaust, either stock or slightly tuned for about a 1000 kms. I loved it, that itself made my blood rush. Then he said, i shd change my exhaust. I said, if you feel, the bike shd have it, then it shd have it. He put in his tuned exhaust, and man, what a difference. One has to ride the bike and feel it to really understand what Joel is trying to say in the above post. To tell you the truth, I never really understood what Joel was talking to me about the mods on my bike, till he was done and I rode the bike. The only thing i did, was Trust him.

What ever he is charging, would still not justify the effort, the time, the energy, the sacrifices that this guy has put in, into developing that part, which people like me and others just enjoy.

Some here are talking about fuel efficiency, which is inversely proportional to power. Either you enjoy power and the adrenaline or smile at the efficiency figures you get from your bike. I never even gave a thought to what numbers I would get from my bike which was giving me 52-53, even after running for 50k kms b4 any kind of mods were done. The bike now is a 185cc and gives me an efficiency of 43-44kmpl in city in bumper to bumper/wheel to wheel Hyderabad traffic. I could not have asked for more.

If you love your bike, and want to love it more, trust this guy, he can make it happen. He did it for me.

^^ i agree... and i feel that the price you have put up is justified for the gains one stands to make..

The Gladiator has decent scope of modifying. I have not seen the P135 and hence will reserve my comments until I sample one.

I have received quite a lot of mails over the last few days, but looking at the responses I can confirm and quote that our biking community is far behind in awareness of performance products and tuning sense.
Most of them want high performance for peanuts and nobody understands that there is a lot that takes to build a package and then there is a lot of cost involved in the development. A performance product is not weighed by the cost of the material and build cost alone, it includes cost of development as well. I have sampled and done various iterations of pipes before the final one is done. The results are evaluated and then improved if needed further. Engine development is another ball-game altogether. Money and parts are flushed down the drain!

4-strokes have a lot of scope to unleash power if tapped rightly, else you will loose over stock. Exhausts which are badly built will retard the overall performance, however you will get some serious psychological gains. A pipe with the wrong tuned length and dimensions will cause damage to the internals and will reduce the overall efficiency as well.

Many wonder why a stock exhaust cant be opened up and turned into a freeflow instead of a full system. Well, the point is that we are trying to keep the right tuned length and that can never give you the right results. Thats the job of an illiterate mechanic who does that for a few hundred rupees and you get some psychological numbers in the bargain and not the right performance.

if only I wish I wud have lived in Bangalore...............I wud have sent my bikes to him(Joel) and would have made even a commuter among them a performance monger !!!!!! Its my bad luck that I stay very far away from such a perfo genius.Great going Joel, pls help me if I need some advice.Joel is someone who can show the world what he can do with bikes which everyone thinks absurd Losers.Simply awesome.

thanks for the reply joel.. much appreciated.