Hi All, I have just recently purchased a 1998 GSX limited with a 1997 787(110 HP) engine. First time out was a dissapointment as it would only hit approx 4500 rpm when you gave it throttle and was a complete dog out of the hole. Once you got her going a bit the revs would start coming up to 6 or 7k and it would hit almost 55 MPH which is what I beleive the 787 is rated for in the 500 lb machine. I should also mention that I cleaned out the carbs, compression check is 130psi per side and the motor runs great. After checking into things a bit I figured out that the impeller is still the original one for the 951 motor. Its part number is 271 000 654 and is a very weird looking impeller it has a pitch of 9-21. According to the dealer, the 787 motor should "FLASH" to approx 7000 rpm when full throttling the machine. So this make total sense that I have to much impeller for the smaller motor. My question is, what impeller should I use for this combo?? It has the 155mm pump housing so there is not many options for an impeller. I was reccomended to get the solas st-cd 10/16 impeller as it can be used on a 01-05 720 gti as well and the 04-05 3D RFI, and those two are the closest setup to what I have. Am I going in the right direction here?
Im open to any suggestions or reccomendations. One thing I dont get is the pitch of the impellers listed for 97.5 to 1999 gsx limited are all over the map, we have 9/21(1997.5), 16/25(1998),13/21(1999). How can this be if they all have the same 947 engine??
Im open to any suggestions or reccomendations. One thing I dont get is the pitch of the impellers listed for 97.5 to 1999 gsx limited are all over the map, we have 9/21(1997.5), 16/25(1998),13/21(1999). How can this be if they all have the same 947 engine??
