"S" turbo owners with no shim - Gauging boost/gas combos
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Are you running the turbo with stock compression? Pump gas or race gas?
Chris
Chris
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Yes Chris, I am at stock "S" compression. I planned on running at 8psi with the torco accelorator mix for a 97 octane blend and start dialing in the clutch and A/F from there. Basically, just wanted to see what the rest of the crowd had been doing to gain an average. 5 or so guys I have talked to run anywhere from 8-10psi with the S's and range from 93 octane with octane boost all the way to VP112. Also, I may add I'm about 500 ft. above sea level. Thanks for your help!
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Thanks Jack!
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I'm running 11 lbs at sea level, 110 race gas. It wasn't setup at Aero?
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If it were me, I wouldn't go above 6 psi on high octane pump gas to keep it reliable. From there, it's hard to say what's safe long term, so I really can't comment accurately for you. All we know is on a 11:1 compression motor with stock timing, running over 6 psi is pushing your luck. Of course, I you had a dynatek to retard the timing in the higher rpms that's a different story. But, you have to be careful there too, because going with too much retarded timing will result in a loss in power. Not sure how much that helps...
Chris
Chris
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I thought it would be too. Clutching was way off. Andrew mentioned a few people with the stage 2 and 3 have been seeing this. He has really been helping out by sending the weights out by the way. Great guy to deal with! Blew right through the 7K soft limiter at 6900 with the stage 2 sticky EPI belt(Told worth roughly 10 added grams) and 68's. I tried the 78's last night and could only manage 6100-6200 at 7psi. Going back up to 8psi and trying 76's tomorrow. I'm trying to flash it at 6600-6700 and hold 6500-6600. A/F, clutching, and psi dialing seem to be giving me a bit of a fit in the mean time...I ran into some slight oddities with the aerocommander but seems to be fine now. A/F was basically all over the board and one time the boost signal was stuck on the commander at idle giving me a low 10 AFR idle. I restarted the rzr and it went away and hasnt returned. More of my tuning may have to wait until next week. Hit 100 today with 70% humidity. Even my truck is throwing a fit at these temps! Thanks for the post up
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We when through the same thing on my buddys rig. The clutching so off it made every thing seem off. Aero will get you fixed up. 
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Any insight is appreciated. I did get the dynatech ignition but I believe the stock curve is used. I may look into that aswell. Thank you Chris
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Thanks Jerry, do you know where your buddy ended up on clutching?We when through the same thing on my buddys rig. The clutching so off it made every thing seem off. Aero will get you fixed up.
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Went to the stage 1 kit.Thanks Jerry, do you know where your buddy ended up on clutching?We when through the same thing on my buddys rig. The clutching so off it made every thing seem off. Aero will get you fixed up.
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Like chris was saying dont go over 8 PSI on a stock RZR engine, especially if its a newer rzr. You WILL TWIST THE CRANK!!
Good luck
Good luck
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Newer RZR? By that you mean low hours or the 2010 model year? I believe the motor configurations between the 09 and 2010 S are the same so please elaborate if you could. Thanks banshee!Like chris was saying dont go over 8 PSI on a stock RZR engine, especially if its a newer rzr. You WILL TWIST THE CRANK!!
Good luck
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While on the topic of tuning, does anyone happen to know the affect of weight(of the vehicle) on clutching? By this I mean a passenger. I would think you would need to increase in clutching weight due to the higher load but I could be thinking backwards again! I tried the 76g weights today with 8psi and its flashing to the soft limiter then backing down to 6600 or so. Just trying to prepare for weight in the vehicle. Thanks
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The more weight you carry in the vehicle, the less weight you need in the clutch. The weights work to compress the primary spring and cause the clutch to shift out. Honestly you need to get a set of adjustable weights to dial it in perfectly...without them, it will be a compromise for sure.
Chris
Chris
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Something "appears" to be diff with the 2010 cranks..there are more failures when boosting on the 2010 compared with 08's and early 09's. Maybe they are made in china now.:question:Newer RZR? By that you mean low hours or the 2010 model year? I believe the motor configurations between the 09 and 2010 S are the same so please elaborate if you could. Thanks banshee!Like chris was saying dont go over 8 PSI on a stock RZR engine, especially if its a newer rzr. You WILL TWIST THE CRANK!!
Good luck
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Mike, are people boosting them at the same levels everyone always has been, or are they pushing the limits? We haven't heard anything yet, although we did hear they were having transmission problems early in 2010, but immediately came out with a new gear set or something like that to fix the problem...not really sure.
Chris
Chris
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