srx compression

05VMAX, I THINK THERE WAS ALOT OF INFO HERE ABOUT THOSE PIPES. I ALMOST BOUGHT A SET FROM VALIN FOR MY 2000 SRX. IF I REMEBER RIGHT ANOTHER MEMBER HERE POSTED VIDEO OF HIS SRX WITH POWER inc PIPES. HP GAIN OVER STOCK PIPES WAS AROUND SIX. PRETTY TUFF TO BEAT STOCK SRX PIPES THOUGH. 3:16 (yammie tony)
 
here in maine (not sure where you ride) you will get harassed with that can on there if you ride it enough. i did i used to have a growler on mine now i have just the stock can makes enough power for me and without all the hassle. if you ride in the east millinocket area you can almost expect to see johnny law waiting in the parking lot. another time i got a hard time over the triple pipes mine are stock tried to tell me no manufacturer used triples.


blue
 
well these arent loud pipes when you get right on them. guys this sled came w/ these pipes on them as i wasnt trying to get any more more out of this sled. i am trying to get all the info i can on this set up so i know what to expect this winter on jetting issues or running pump gas. blue, theres guys who go by my house (live on an its trail) w/ race pipes who rattle my windows at 2 am(pisses me off for sure). jonny law ought to do some research as there are alot of sleds w/ tripple pipes lol. i would like to know why someone would put power inc pipes w/ an dyno port silencer then? maybe for sound. well my search will contuine on finding more info. thanks guys for the info.
 
i would say the heads have been "Swurled" on that sled.i have a buddy who had his tripple piped 700SX done like that(all the work is done inside the combustion chamber of the head).you better make sure you have good fuel.
 
well the heads have been shaved for sure. like mentioned my only concern is running pump fuel. i might run octang booster or something to be sure.
 
05vmax said:
well the heads have been shaved for sure. like mentioned my only concern is running pump fuel. i might run octang booster or something to be sure.
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well im no expert on Yamaha's but if the stock compression is 125 and your showing 150..thats really close to requiring pro-fuel on any kind of long pull...my old F7 would melt pistons if i bumped the head pressure 25psi and didnt run at least 75% pro-fuel...probley doesn't relate to a Yamaha motor but i did help change some pistons in my friends SX...lol
 
just pick up a set of used stock heads and put the worry behind you. that is what i would do if it was mine bro.
 
i think i know how to burn piston lollll..burn 5 last years take me time to jet up the srx been there done that
 
ya but w/ these heads maybe i'll have a chance on beating 02' lol modsrx what are running for jets on yours?
 
well its ported so depends how they are made it will change the mixture but i'm running 160 without no more burn down... i'm sure mr viper can help u alots....try not to run more than 145 to 150 for a trail sled.. not sure if u need to run higher jetting with higher compression i'm sure it will produce more heat with higher compression maybe mr could anwser that question
 
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YAMMIEGOD3:16 said:
YOU WANT TO BEAT A 02 WHAT ? SRX !!! 3:16 (yammie tony)
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meaning ramblns 02' srx yamie lol. mine is already jetted piolets as well as mains to compensate for the compression im guessing. kinda cant wait to see what this will do.
 
05vmax said:
meaning ramblns 02' srx yamie lol. mine is already jetted piolets as well as mains to compensate for the compression im guessing. kinda cant wait to see what this will do.
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compression ratio shouldn't change jetting. quality and octane of fuel will.
 
has anyony poster a thread about compression ratio?

has any one posted a thread about compression ratio testing?meaning how to do it?
 
hanker37 said:
has any one posted a thread about compression ratio testing?meaning how to do it?
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YES,

At operating temp, ignition off, throttle wide open, give it 3-5 good pulls. Move on to the next cylinder.

Some people like to have all the plugs out, some like to leave the other cylinder plugs in.
 
maxwell said:
YES,

At operating temp, ignition off, throttle wide open, give it 3-5 good pulls. Move on to the next cylinder.

Some people like to have all the plugs out, some like to leave the other cylinder plugs in.
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that's just getting the max compression, for any given cylinder. compression "ratios" are found out with lots of measurements, mathmatics, and formulas. i know the example is 4-stroke automotive engine, but the same would apply to a 2-stroke....here, read on:

http://www.carcraft.com/techarticles/calculate_compression_ratio/index.html
 
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