Originally Posted by TBatt At idle the SC will rattle. It is simply the backlash in the drive gears as the engine is constantly changing RPM during idle (it is
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04-05-2019, 10:01 AM | #346 (permalink) | |
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PS you still got that belt? I gotta paypal you my bad my ADD is real
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04-05-2019, 10:52 AM | #347 (permalink) |
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Your belt could be too tight. Back it off some.
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04-06-2019, 12:19 AM | #348 (permalink) |
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So I have just a couple more questions please. I am really thinking about picking this up but I am just very unfamiliar with superchargers sorry.
What PSI pulley does this kit come with? I am assuming 10 but not sure and will anybody be able to tell me whats the highest amount of boost you've ran on pump gas safely? If you where running say a 14psi pulley are you able to hook up an electric boost controller to run less boost if you wanted to for daily driving? What would be the smallest/high boost pulley this kit would be able to run efficiently? Reasons I ask these questions is because I would like to run lower boost on 91 octane but be able to up the boost from in the car and run as much as I can with water/methanol injection and tuning of course safely... |
04-06-2019, 12:57 AM | #349 (permalink) |
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I’ll just mention this since it may not be apparent. Boost with a centrifugal supercharger, like the one in this kit, is directly related to RPMs. Boost rises in a linear fashion as revs increase. With a “15 psi pulley” you will only hit maximum boost at redline, typically 7500 RPM. So you may for example only be at 12 PSI at 6500 RPM. So you can control boost by controlling RPM and shifting early.
It sounds like you would have 2 maps. One with meth injection and one without. You could just get a high boost pulley and then have your non meth tune with a redline of say 6500, which would keep your boost below max. Your meth tune would rev to 7500 and give you full boost. No other form of boost control needed. These number are theoretical examples, not actual real world numbers. Sent from my iPhone using Tapatalk
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04-06-2019, 09:26 AM | #350 (permalink) | |
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I was able to run close to 13 psi on 91 octane before I started getting knock. I controlled boost using a 38mm wastegate and ebc. I was running e85 and 91 octane. I set the boost controller to open the wastegate at 12 psi when on my 91 tune snd stay closed on e85 tune. Or, if I turned the boost controller off, the wategate would open at spring pressure of 10 psi for daily driving on either 91 or e85.
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04-06-2019, 08:19 PM | #352 (permalink) |
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Here's a pic
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04-06-2019, 08:24 PM | #353 (permalink) |
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Four different boost settings.
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04-06-2019, 10:05 PM | #354 (permalink) |
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I didn't expect the torque to to drop so drastically in the upper RPMs. I would be really stoked with something like that green dyno run with pump gas and meth. Will this kit simply be able to achieve those boost numbers by just changing a pulley and belt?
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04-06-2019, 10:28 PM | #355 (permalink) |
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If you changed the sc pulley to a 2.85 it would get you close to 13 psi. Pump gas and meth might get you there. Prior to adding the wastegate, that set up got me 586whp on e85. It made 491whp on 91.
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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo 700+whp Last edited by redondoaveb; 04-06-2019 at 10:34 PM. |
04-07-2019, 12:33 AM | #356 (permalink) |
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Changing pulley and belt will definitely help you increase boost but the problem is your tuner has to pull a bunch of timing back to avoid knock if your using 91. The only advantage of using aggressive setup is that you can have your torque come sooner (better low-to-middle end). In addition, the torque depends on the supporting mods. You can also gain torque/boost by simply putting a restrictive exhaust system. However, it will not only increase the back pressure as well as exhaust gas temperature but also loose top-end power.
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04-07-2019, 01:46 PM | #357 (permalink) | |
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04-07-2019, 07:13 PM | #358 (permalink) | |
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04-07-2019, 07:26 PM | #359 (permalink) | |
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04-07-2019, 07:29 PM | #360 (permalink) |
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I didn't say it will add power. You completely misunderstand it but that's OK. I just said it will add "boost" but loose the top-end power.
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