Full Version: storm 750 pipes
i have a 93 indy storm 750 that i am trying to get a little meaner for this winter and i am having some trouble finding racing pipes for it any places i should be looking or just general info would be appreciated.
QUOTE(spaceballs004 @ Jul 14 2008, 05:08 PM) 
i have a 93 indy storm 750 that i am trying to get a little meaner for this winter and i am having some trouble finding racing pipes for it any places i should be looking or just general info would be appreciated.
PSI made a good set of Stockblaster pipes for that sled. If it's ported, they also had Modblaster pipes that worked well.
I never piped mine though. The stock pipes work very well. I just modified the carbs, clutching, reeds. I beat many 93 T-Cats and others. If you do that, use 240 mains (270 main in the Mag carb), install Mikuni power jets with #80 jets, V-Force reeds, and stock 64 gram clutch weights with Polaris blus spring, an a 53/36 Chopper City helix with a grey spring in the #4 hole. Stock gearing was 23/37. I went to 22/37.
This year Storm is very torquey and has great throttle response when tuned right. It will make mincemeat out of many bigger sleds.
I have numerous spare components, including power jetted carbs, V-Force reeds, and other components for that sled. Even a turbo kit good for 200 hp at 7 psi boost on pump fuel. I turboed about 6-8 of those 93 Storms with great results. Still averaged 13 mpg on the trail. Here's a pic of mine. E-mail me at processinsight@provide.net for more pics, etc.
Phil
QUOTE(PatrioticInnovations @ Jul 14 2008, 05:32 PM)
PSI made a good set of Stockblaster pipes for that sled. If it's ported, they also had Modblaster pipes that worked well.
I never piped mine though. The stock pipes work very well. I just modified the carbs, clutching, reeds. I beat many 93 T-Cats and others. If you do that, use 240 mains (270 main in the Mag carb), install Mikuni power jets with #80 jets, V-Force reeds, and stock 64 gram clutch weights with Polaris blus spring, an a 53/36 Chopper City helix with a grey spring in the #4 hole. Stock gearing was 23/37. I went to 22/37.
This year Storm is very torquey and has great throttle response when tuned right. It will make mincemeat out of many bigger sleds.
I have numerous spare components, including power jetted carbs, V-Force reeds, and other components for that sled. Even a turbo kit good for 200 hp at 7 psi boost on pump fuel. I turboed about 6-8 of those 93 Storms with great results. Still averaged 13 mpg on the trail. Here's a pic of mine. E-mail me at processinsight@provide.net for more pics, etc.
Phil
I never piped mine though. The stock pipes work very well. I just modified the carbs, clutching, reeds. I beat many 93 T-Cats and others. If you do that, use 240 mains (270 main in the Mag carb), install Mikuni power jets with #80 jets, V-Force reeds, and stock 64 gram clutch weights with Polaris blus spring, an a 53/36 Chopper City helix with a grey spring in the #4 hole. Stock gearing was 23/37. I went to 22/37.
This year Storm is very torquey and has great throttle response when tuned right. It will make mincemeat out of many bigger sleds.
I have numerous spare components, including power jetted carbs, V-Force reeds, and other components for that sled. Even a turbo kit good for 200 hp at 7 psi boost on pump fuel. I turboed about 6-8 of those 93 Storms with great results. Still averaged 13 mpg on the trail. Here's a pic of mine. E-mail me at processinsight@provide.net for more pics, etc.
Phil
ya my sled right now is pretty fast but i would like to make it a little faster that sled of yours looks pretty sweet how much did it cost to put the turbo in it and is a hard job to do. You seem very knowledgeable about this sled my email address is swatowski101@yahoo.com i'll send pics of mine. Right now I am trying to get xcr carbs which are a rack of carbs just to get rid of the old seperated mikunis that are in it now. I would like to get more throttle response out of it. Right now I think and am using for cylinders 1 and 2 i have 210 mains and for the third cylinder i have a 220 in it just because the pipes are closer to that cylinder and it runs hotter on that side. I would also like to get a triple angle helix just so I get the best of top speed and take off. And I think my engine might be bored on the heads a little bit because it sounds bassy and it had about 130psi per cylinder dont know what the stock psi per cylinder is but i am really interested in talking to you about my sled and how to improve please give me some tips.
I have a complete Storm motor for sale with pipes
QUOTE(Speedslut @ Jul 14 2008, 09:15 PM)
I have a complete Storm motor for sale with pipes
what kind of pipes do you have for the engine
QUOTE(spaceballs004 @ Jul 14 2008, 08:37 PM)
ya my sled right now is pretty fast but i would like to make it a little faster that sled of yours looks pretty sweet how much did it cost to put the turbo in it and is a hard job to do. You seem very knowledgeable about this sled my email address is swatowski101@yahoo.com i'll send pics of mine. Right now I am trying to get xcr carbs which are a rack of carbs just to get rid of the old seperated mikunis that are in it now. I would like to get more throttle response out of it. Right now I think and am using for cylinders 1 and 2 i have 210 mains and for the third cylinder i have a 220 in it just because the pipes are closer to that cylinder and it runs hotter on that side. I would also like to get a triple angle helix just so I get the best of top speed and take off. And I think my engine might be bored on the heads a little bit because it sounds bassy and it had about 130psi per cylinder dont know what the stock psi per cylinder is but i am really interested in talking to you about my sled and how to improve please give me some tips.
These Storms were set up poorly from the factory due to problems with piston burndown. It was mostly due to a larger crankcase volume on the magneto side (Not pipes or cylinders). This lessened the carb suction signal and required 3 sizes larger main jet. On the turbo, I had to also raise the needle one position on that cylinder.
Another issue was the flywheel on that side. It provided 28 degrees timing at 3000 rpm and 12 deg at 7500. Polaris "updated" all of those to 22/11 flywheels to reduce burndowns and kill the low speed torque. I never allowed that to be done and it really ran well.
If your sled has the updated flywheel, it will be sluggish at low rpm.
Another problem was that originally the carbs float bowls were vented to the airbox with overflow drain check valves to prevent air pressure from underhood to enter and richen up the carbs at higher speeds. Mains were 320,320, 350 PTO to Mag. In an effort to make these sleds competitive with the T-Cat and others, Polaris issued a update to the dealers. It required them to drop mains to 260, 260, 290 and remove the venting connected to the airbox and just hang them behind the engine. This improved response, but was very problematic due to erratic underhood air pressure in various riding conditions. This update was later recinded. So, I developed a similar jetting setup on mine using Mikuni Powerjets jetted as stated earlier and vents to the airbox. The MachZ Skidoo also did this.
Based on your main sizes, your sled must be set up for underhood vents and summertime riding or it would burn down.
The carbs from an XCR 800 would probably work pretty well if correctly setup. But, the stock carbs can be made very responsive.
I sent you an e-mail.
QUOTE(PatrioticInnovations @ Jul 15 2008, 05:57 AM)
These Storms were set up poorly from the factory due to problems with piston burndown. It was mostly due to a larger crankcase volume on the magneto side (Not pipes or cylinders). This lessened the carb suction signal and required 3 sizes larger main jet. On the turbo, I had to also raise the needle one position on that cylinder.
Another issue was the flywheel on that side. It provided 28 degrees timing at 3000 rpm and 12 deg at 7500. Polaris "updated" all of those to 22/11 flywheels to reduce burndowns and kill the low speed torque. I never allowed that to be done and it really ran well.
If your sled has the updated flywheel, it will be sluggish at low rpm.
Another problem was that originally the carbs float bowls were vented to the airbox with overflow drain check valves to prevent air pressure from underhood to enter and richen up the carbs at higher speeds. Mains were 320,320, 350 PTO to Mag. In an effort to make these sleds competitive with the T-Cat and others, Polaris issued a update to the dealers. It required them to drop mains to 260, 260, 290 and remove the venting connected to the airbox and just hang them behind the engine. This improved response, but was very problematic due to erratic underhood air pressure in various riding conditions. This update was later recinded. So, I developed a similar jetting setup on mine using Mikuni Powerjets jetted as stated earlier and vents to the airbox. The MachZ Skidoo also did this.
Based on your main sizes, your sled must be set up for underhood vents and summertime riding or it would burn down.
The carbs from an XCR 800 would probably work pretty well if correctly setup. But, the stock carbs can be made very responsive.
I sent you an e-mail.
Another issue was the flywheel on that side. It provided 28 degrees timing at 3000 rpm and 12 deg at 7500. Polaris "updated" all of those to 22/11 flywheels to reduce burndowns and kill the low speed torque. I never allowed that to be done and it really ran well.
If your sled has the updated flywheel, it will be sluggish at low rpm.
Another problem was that originally the carbs float bowls were vented to the airbox with overflow drain check valves to prevent air pressure from underhood to enter and richen up the carbs at higher speeds. Mains were 320,320, 350 PTO to Mag. In an effort to make these sleds competitive with the T-Cat and others, Polaris issued a update to the dealers. It required them to drop mains to 260, 260, 290 and remove the venting connected to the airbox and just hang them behind the engine. This improved response, but was very problematic due to erratic underhood air pressure in various riding conditions. This update was later recinded. So, I developed a similar jetting setup on mine using Mikuni Powerjets jetted as stated earlier and vents to the airbox. The MachZ Skidoo also did this.
Based on your main sizes, your sled must be set up for underhood vents and summertime riding or it would burn down.
The carbs from an XCR 800 would probably work pretty well if correctly setup. But, the stock carbs can be made very responsive.
I sent you an e-mail.
could you please be a little more detailed
QUOTE(spaceballs004 @ Jul 15 2008, 07:11 AM)
what kind of pipes do you have for the engine
stock
Stock pipes work very well on a stock motor...our guys never lost a race with a stock 750 storm when setup properly when those sleds came out. Unless your modding the motor to run higher rpm..stay with the stock pipes.
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.