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Mods For 130hp From 82 GS1100E?

  • Thread starter Thread starter Anonymous
  • Start date Start date
Hello Robin
Thanks for your reply, the information you have provided is very benifitial for my build up.
Regards, Archie
 
My bike with stock pistons, stock head, stock cams made 113 Hp and 75 foot pounds of torque. I do have a pro drag race only pipe, 36 mikuni flat slides, and a dyna msd ignition. When I put in a low compression 1166 wiseco kit and kept the stock unported head and cams I got 128 Hp and the torque was around 80 something. I degreed the stock cams to 110/110 but haven't run it on the dyno again. I picked up about 2 tenths so I think I'm probably over 130 Hp. I'm looking for reliability and ease of maintenance.

Ryan
www.rccracing.com
 
rosco15 said:
My bike with stock pistons, stock head, stock cams made 113 Hp and 75 foot pounds of torque. I do have a pro drag race only pipe, 36 mikuni flat slides, and a dyna msd ignition. When I put in a low compression 1166 wiseco kit and kept the stock unported head and cams I got 128 Hp and the torque was around 80 something. I degreed the stock cams to 110/110 but haven't run it on the dyno again. I picked up about 2 tenths so I think I'm probably over 130 Hp. I'm looking for reliability and ease of maintenance.

Ryan
www.rccracing.com
Click to expand...
Very nice web site. I like how you have info on your HPand times posted on it. But the exhaust system on your 1100 is as ugly as all get out .
 
I agree, but like you say Quiet exhausts kill((horsepower)). The site is a work in progress.
Click to expand...


I have to disagree with this. Look at the current GSXR1000. It is making around 153rwhp (from only 1000cc at that) and it is as quiet as your neighbour's Taurus. It is easier to make power that is loud, but it is not an absolute requirement. Power is made by having proper length head pipes (which virtually ALL aftermarket systems do poorly at) and matching everything properly to your engine (pipe diameters, lengths, carb size, cam timing, etc). Most aftermarket pipes simply make a bit more than stock because they remove a small amount of restriction from the system. The best system you can get is a 4-1 (for four cylinder engines, of course) using short headpipes and a megaphone with revese cone to keep the powerband wide. Anything else is second best.

Boy, don't get me started on the exhaust thing... :evil:


Mark
 
mark m said:
I agree, but like you say Quiet exhausts kill((horsepower)). The site is a work in progress.
Click to expand...


I have to disagree with this. Look at the current GSXR1000. It is making around 153rwhp (from only 1000cc at that) and it is as quiet as your neighbour's Taurus. It is easier to make power that is loud, but it is not an absolute requirement. Power is made by having proper length head pipes (which virtually ALL aftermarket systems do poorly at) and matching everything properly to your engine (pipe diameters, lengths, carb size, cam timing, etc). Most aftermarket pipes simply make a bit more than stock because they remove a small amount of restriction from the system. The best system you can get is a 4-1 (for four cylinder engines, of course) using short headpipes and a megaphone with revese cone to keep the powerband wide. Anything else is second best.

boy, don't get me started on the exhaust thing... :evil:


Mark
Click to expand...

but I want to...why not :twisted:
 
mark m said:
I agree, but like you say Quiet exhausts kill((horsepower)). The site is a work in progress.
Click to expand...


I have to disagree with this. Look at the current GSXR1000. It is making around 153rwhp (from only 1000cc at that) and it is as quiet as your neighbour's Taurus. It is easier to make power that is loud, but it is not an absolute requirement. Power is made by having proper length head pipes (which virtually ALL aftermarket systems do poorly at) and matching everything properly to your engine (pipe diameters, lengths, carb size, cam timing, etc). Most aftermarket pipes simply make a bit more than stock because they remove a small amount of restriction from the system. The best system you can get is a 4-1 (for four cylinder engines, of course) using short headpipes and a megaphone with revese cone to keep the powerband wide. Anything else is second best.

Boy, don't get me started on the exhaust thing... :evil:


Mark
Click to expand...

Mark SOME of what you say is true, the bit in bold is rubbish!!! long pipes make torquey wide powerband motors short pipes are all topend.
Dink
 
rosco15 said:
I agree, but like you say Quiet exhausts kill((horsepower)). The site is a work in progress.

Ryan
www.rccracing.com
Click to expand...
Ryan
Thats why I have the exact same pipe on mine and tuned to run without a baffel :lol:


----------------------------------------------------------------------------------

And a note for the other gent.
Liquid cooled engines can deliver more HP on the closer tolerances alone. And you might be shocked at the exhust experience that is found in our group. Talk please and dont be so braggy about how much you know.


:evil: this face is not needed to talk actual facts about specs. Most of us do not buy HP from the factory. :D
That pipe requires much more than a bolt on and will acomodate a tremendous amount of engine mods when the pots etc. are tuned.
 
Mark SOME of what you say is true, the bit in bold is rubbish!!! long pipes make torquey wide powerband motors short pipes are all topend.
Click to expand...

You are correct about short pipes tuning to a higher rpm and longer pipes tuning to a lower rpm. The point you are missing is that either way, the pipe length tunes only for a narrow rpm range and it is wrong for every other one. Long pipes hurt top end because they are simply too long to resonate properly at higher revs. Note I mentioned using a megaphone after the short head pipes. This is what makes the short pipes work. The short head pipe tunes for a high rpm and then the meg draws out the suction pulse to keep the mid range power good. If you make your meg about 85%-100% as long as the head pipes, then the overall system length will also resonate at half the peak rpm, also helping out the mid range.

For anyone who is doubting the use of a meg (since most current systems are canister style), just look at F1 engines. They have total freedom to run any exhaust arrangement they want and they still run 5-1 systems with a meg on the end. And the Honda RCV211 was running megs by the end of this season, in their quest to outrun the Ducati (which also looked to have megs hidden in the system). The drag racers do it right, with short headers and an unmuffled meg.


Talk please and dont be so braggy about how much you know.
Click to expand...

I was not trying to brag and I didn't want to offend anyone. Exhaust design is an incredibly complicated art/science and what I know is a tiny fraction of what is out there. But I wanted to point out that power and noise are NOT necessarily linked and that most aftermarket exhaust systems are actually pretty poorly designed, with unequal length head pipes and are not well matched to the engines they are sold for. That's all.


Mark :) (smiling, and not taking this too seriously)
 
I am admittedly addicted to the grunt of these GS engines, therefore I am unwiling to sacrifice low and midrange stomp for topend thrills. I do agree totally that noise does not in anyway equal power!!! Loud pipes DO NOT make more power, they just P#ss everyone else off. Equal length is vital in an exhaust system and I agree with Mark that not many aftermarket pipes actually feature equal length headers. I will differ though over header length as I believe that a longer header length is desirable, due to my desire to maintain or even increase midrange torque, and to this end I believe that the best length for a 16 valve GS(X) motor is mid to rear of the sump plate into a large bore collector of about 75% header length.
BTW I base my opinions upon many years experience with motors in general and 18 months working in the aftermarket exhaust industry, plus I have picked the brains of quite a few engine builders too.
Dink
 
slopoke said:
Talk please and dont be so braggy about how much you know. :evil: this face is not needed to talk actual facts about specs.
Click to expand...
I did not think he was boasting about anything. Go figure.
 
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