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#1
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sizing a supercharger?
how do you size a supercharger to an engine? I notice that the whipple 1600 ax displaces 1.6ltr, which roughly half the size of our 3.3 ltr motor. Would you want to use a supercharger of the same displacement?
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#2
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Re: sizing a supercharger?
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I don't think whipple even provides plots of their supercharger performance because they don't really sell bare head units to the common installer. You have to go directly to lysolm who has the intellectual property rights and does the manufacturing. Whipple superchargers are actually lysholm superchargers. Because they could care less about you buying a supercharger their plots are not very easy for you to read. The ideas are generally the same though and the information is excellent. Because twin screw superchargers are much more efficient at higher boost levels the output you will get from a twin screw compared to a similarly sized roots will be much higher. You'll won't get any nice little cfm graphs to go plug into your turbo calculator though. The lysholm engineers don't know what a cfm is and could care less about selling their products to someone who doesn't know how to do the math themselves. They aren't much into psi either. You'll see #'s like 1 2 3 on their plots which are ratios of atmospheric pressure. |
#3
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Re: sizing a supercharger?
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Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#4
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Thank you Harvey he was a little confusing
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86 GMC Jimmy Blue and Silver- R.I.P. 87 Integra RS ~228k miles R.I.P. 92 SVX LS-L Perly ~186k R.I.P. 89 240sx se red ~165k miles Gone and unknown 89 240sx se Black~185k R.I.P. 85 Toyota pickup ~205k R.I.P. 85 BMW 325e ~ Gone and unknown 85 Ford Mustang getting engine swap now! 05 Colorado ~108k Daily Driver |
#5
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Sorry I didn't mean to be confusing. You'd have to actually look at the plots to understand what I was saying though. If he's actually interested in sizing a supercharger he'd want to do that. |
#6
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Longass...
I really appreciate what you are doing to the EG33 as mods. In my opinion you should be really nominated as the SVXer of the year 2004. your engine mods are really impressive in terms of making the impossible being made possible. comparing it to the bodykit, a bodykit can be easily made, any handy guy can get fiberglass or carbon fiber and do it, whereas it requires a real genius to tune up an engine correctly...
the thing is that most of us are not really deepened with mechanics and ECU readings and stuff... not all people know that but they know when they see a body kit that it is made either in fiberglass or carbon, and molds are used to do it... but mechanics is a vast world, most people know around 20% of it (like i do, i know a lot of stuff but not deep enough to understand a 100% the mods you did on the EG33)... so the bottom line, we are eager to reach this 100% knowledge about your mods, if you can really resume them along with pictures in a thread in an english description rather mechanical english one....(like in the movies when the boss doesn't understand the achievement of his employee he says:"... does somebody speaks english around here?...) it would be helpful for us and beneficial to you... (people will then understand the mods you did and as a basis demands for it will grow = $$$ to u )
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Danny 1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon) 1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration 2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection. |
#7
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Re: Re: sizing a supercharger?
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ok, so. The enine under normal condition uses 1.6ltr of air to function, and with this model supercharger we are forcefeeding it twice the volume of air per revolution? |
#8
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Re: Re: Re: sizing a supercharger?
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1:1 = 0 boost 1.5:1 =7lbs boost 2:1 =14lbs boost Harvey.
__________________
One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#9
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Re: Re: Re: sizing a supercharger?
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As I remember the math I used to decide on our drive ratio began with factory peak power and the ve at that rpm to determine air ingested and the power derived from it. From there I think I threw in the power level desired compared to peak power to get a multiplier for the air ingested to produce an amount of air injested that would produce around the power output desired. Then I did something like determine the ratio of atmospheric pressure that amount of air forced into the engine would produce. (somewhere around here a power correction for predicted ignition advance decreases was done) Then looked up in lysholms perfromance chart what input shaft speed would drive that amount of air. Then took that as ratio of max rpms as our peak power will now be at max rpms. My math was more ellegant and correct than this but just throwing out most of the variables used and roughly how so you can get a vague idea of how it is done if that's what you are looking for. If you are looking for the final result, to give the simplest answer possible..........It's plenty big and will produce lots of power efficiently. |
#10
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No No He just shaved off the 5o'clock shadow so to speak.(slight realignment that made it All clear)
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__________________
86 GMC Jimmy Blue and Silver- R.I.P. 87 Integra RS ~228k miles R.I.P. 92 SVX LS-L Perly ~186k R.I.P. 89 240sx se red ~165k miles Gone and unknown 89 240sx se Black~185k R.I.P. 85 Toyota pickup ~205k R.I.P. 85 BMW 325e ~ Gone and unknown 85 Ford Mustang getting engine swap now! 05 Colorado ~108k Daily Driver |
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