Hks supercharger power lose
04-10-2018, 10:49 AM
#1
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Hks supercharger power lose
so I was driving home yesterday and all of a sudden I stopped getting boost. No weird noises or pops. Belt still spins and so does the system. Just no power. Can’t even hear any whine or blow off sound anymore. I’m stumped as everything sounds good and seems to be running. Any thoughts or opinions as I’m not super knowledgeable on boost applications. Also motor seems to be a little loud at 7k rpm. Could be the extra load on it though. Was thinking of taking off the belt and putting a stock tune back in for now.
04-10-2018, 11:05 AM
#2
If the blower is indeed still spinning but no boost is confirmed, then only thing that can be happening really is a leak, and it would have to be a big one like from a coupler blowing off.
04-10-2018, 11:24 AM
#3
so I was driving home yesterday and all of a sudden I stopped getting boost. No weird noises or pops. Belt still spins and so does the system. Just no power. Can’t even hear any whine or blow off sound anymore. I’m stumped as everything sounds good and seems to be running. Any thoughts or opinions as I’m not super knowledgeable on boost applications. Also motor seems to be a little loud at 7k rpm. Could be the extra load on it though. Was thinking of taking off the belt and putting a stock tune back in for now.
Last edited by Boosted04S2K; 04-10-2018 at 02:40 PM.
04-10-2018, 02:01 PM
#4
Agreed, its suspect. Id pull the belt and spin the blower and see if its actually rotating the internal prop/assy. Rotrex blowers have a lot more going on internally with their planetary gear drive and aren't as resilient as the Novi/Vortec units. It wouldn't totally surprise me if something internally is wrong. Blown coupler off the fmic should be easy enough to verify/rule out. The BOV even in open dump isnt large enough area to overcome all the boost pressure and would still read some level of psi on gauge. Assuming you have verified you are not making any boost on your gauge. If you have not, and just going off of feel, then its still possible you are making some amount of boost and the BOV has failed/staying open, or the obvious first thing to check on a non cogged blower is that the belt isn't slipping. There is only so many reasons why you lose boost on a supercharger, and I just listed all of them. Good luck. Keep us posted.
04-11-2018, 05:37 AM
#6
No boost would mean propeller shaft snapped... Typically from a crap BOV not opening when it should causing surge.
Compressor wheel sucked something in causing big time damage.
Key sheered off that your pulley is bolted too, and pulley just spins on the shaft, most likely tearing the shaft up more.
OR you popped a charge pipe or Weld.
Compressor wheel sucked something in causing big time damage.
Key sheered off that your pulley is bolted too, and pulley just spins on the shaft, most likely tearing the shaft up more.
OR you popped a charge pipe or Weld.
04-11-2018, 09:25 AM
#7
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Pulled belt off and intake pipe off. The fins aren’t spinning at all when I turn the pulley. I don’t have time to pull the unit off right now. Could I put a stockish tune back in and drive with just the belt off of the charger and the larger fuel system? It’s my only car at the moment.
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04-11-2018, 09:53 AM
#8
Pulled belt off and intake pipe off. The fins aren’t spinning at all when I turn the pulley. I don’t have time to pull the unit off right now. Could I put a stockish tune back in and drive with just the belt off of the charger and the larger fuel system? It’s my only car at the moment.
04-11-2018, 10:59 AM
#9
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Yes, that's the nice thing about a supercharger. Just bypass the blower for now. Even the supercharger tune could work decent enough since its effectively a NA tune up until the boost map comes into play, so probably best to leave as is. You would need to put stock injectors back in and re calibrate/tune to those otherwise.
04-11-2018, 11:23 AM
#10
so your saying I would only need to put the stock injectors back in if I change the tune? Or should put them back in now? Been driving carefully and under 6k it seems okay. Started to get loud and doesn’t seem right above that rpm. I could be wrong though. Been used to the power for 2yrs now. Thanks for all the help. Fun part is finding the stock components when I take the charger off. I have them somewhere just not sure where lol.
But yeah, you would need to change the tune if you put the stock injectors in. Since I assume you are running larger cc injectors and a aftermarket ecu.
Last edited by s2000Junky; 04-11-2018 at 11:27 AM.