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550 is 65 and the fuji 500,hmmmm 75-80. 90 maybe if it was domestic 500,but the fuji 500 is not 90
 

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Fuji 500 is 70-74 in stock form. EFI sleds 2-3 more hp than carbed. Your 488 is 497 at .60 over. Maybe 2 hp more with the overbore.
 

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barney said:
No wiesco pistons do not give you any more power. And it is pretty close to 90. The domestic 500 (VES) was advertised 105 hp and the Fugi was advertised around 90 hp.
No Fuji 500 was ever anywhere near 90 hp. The 500 Liberty twin (1999) w/o ves was low 90s.
 

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tnmemr said:
barney said:
No wiesco pistons do not give you any more power. And it is pretty close to 90. The domestic 500 (VES) was advertised 105 hp and the Fugi was advertised around 90 hp.
No Fuji 500 was ever anywhere near 90 hp. The 500 Liberty twin (1999) w/o ves was low 90s.
Oh I see I thought Liberty never make a non ves 500. I must have got the Fuji confused with the non ves Liberty 500.
 

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yep the 1st version of the domestic 500 in 99 was non-ves,but the cylinder castings show that they will be on there soon. So the red 2000 xc500 45th ann. edition had ves, but the black xc500s didnt im pretty sure
 

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The 99 also had an iron bore vs. nikasil. Still a very good motor with good torque and hp that could give a larger sled fits at times.
 

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Just to clarify:
Early Fuji 488cc:72-74hp
Late Fuji 488cc (post 1995): 76-78hp
Liberty 500cc (iron lined bores, no VES):92-94hp
Liberty 500cc (nicasil lined bores, VES):103-108hp

Fuji motor was used in the Indy 500. Liberty without VES was used in the 500xc. Liberty with VES was used in the 500xcsp The numbers are estimates based on what I've heard, I have not dynoed the sleds to see what they really are...

Regarding your sleds:
550 Fan: probably 60 average
Your Indy 500: It probably wouldn't run at all, seeing as you would have probably gone into the water jacket!!! I think you forgot a zero. Largest over-bore I've ever seen was 0.060" (1.54mm). That would probably net you maybe 1-3 hp. There isn't much to be had with over-boring the stock cylinders.
 

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chadd said:
Fuji motor was used in the Indy 500. Liberty without VES was used in the 500xc. Liberty with VES was used in the 500xcsp The numbers are estimates based on what I've heard, I have not dynoed the sleds to see what they really are...
Not true. In 1999 there was a 500 XC and a 500 XCSP, and BOTH were non VES.
In 2000, there was a 500 XC with non VES, and a 500 XCSP (45th anniversary edition) with VES.

The only differences between the 1999 500 XC and the XCSP was the XCSP had fox shocks all around (where the XC only had the Fox position sensitve shock in the rear, rest were nitrex select/ryde fx) and the XCSP had the racer seat with the knee pads (where the XC had the full length seat with "wrap around" taillights.
 

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Its kinda confusing on what sleds had the different 500's. Because i think some Edge chassis sleds had the Fujis, while some had the Liberty. It might be the classics that had the Fujis. If you are planning on racing id say the 500 would win. I rode my brothers 550 Supersport some and its just gutless compared to my 500, which i know has more power than the Fujis. Some kid on here tried saying that his 550 would hit 90+ and pull the skis, complete BS.
 

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OhioPolarisKid said:
Its kinda confusing on what sleds had the different 500's. Because i think some Edge chassis sleds had the Fujis, while some had the Liberty. It might be the classics that had the Fujis. If you are planning on racing id say the 500 would win. I rode my brothers 550 Supersport some and its just gutless compared to my 500, which i know has more power than the Fujis. Some kid on here tried saying that his 550 would hit 90+ and pull the skis, complete BS.
The edge indy 500's used the fuji motor, while the XC's and the XCSP's and edge classic's had the liberty.
And yes, I use to have a 2001 supersport and the 550 didn't give me the "neck snap" my '99 XC500 does
 

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Polaris_Parts_MN said:
chadd said:
Fuji motor was used in the Indy 500. Liberty without VES was used in the 500xc. Liberty with VES was used in the 500xcsp The numbers are estimates based on what I've heard, I have not dynoed the sleds to see what they really are...
Not true. In 1999 there was a 500 XC and a 500 XCSP, and BOTH were non VES.
In 2000, there was a 500 XC with non VES, and a 500 XCSP (45th anniversary edition) with VES.

The only differences between the 1999 500 XC and the XCSP was the XCSP had fox shocks all around (where the XC only had the Fox position sensitve shock in the rear, rest were nitrex select/ryde fx) and the XCSP had the racer seat with the knee pads (where the XC had the full length seat with "wrap around" taillights.
You are correct, that only happened for 1999. I had forgotten that. Thanks.
 

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tnmemr said:
Fuji 500 is 70-74 in stock form. EFI sleds 2-3 more hp than carbed. Your 488 is 497 at .60 over. Maybe 2 hp more with the overbore.
Now, is this because of slightly different port sizes/timing? I have heard that EFI jugs on a carbed motor will make more power, but I wasn't exactly sure why. I figured porting would be slightly different. When looking up Polaris part numbers I have found different part numbers for 500 Carbed cylinders and 500 EFI cylinders. The cylinders appear to be the same and the throttle bodies on the EFI bolts up to the same rubber intake boot that the carbed Fuji's use. Also, when using SLP's website for specs for clutching and jetting when using pipes it gives specific instructions for regular carbed 500's as opposed to motors that were EFI or Ported. This leads me to believe that perhaps the EFI cylinders really do have a different port setup. Can anybody confirm?
 
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