Parasitic Loss

Pegasus

Registered User
Does anyone have an idea as to how much parasitic loss a Supercoupe supercharger creates? I have been looking for the answer all over the internet.
Thanks,
Pegasus

My question has been answered by the informative video linked to me by blownbird2.
 
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i think they tell you in this vid


<a href="http://myspacetv.com/index.cfm?fuseaction=vids.individual&videoid=5730741">1989 Ford Thunderbird New Model Service Features Clip 2 of 2</a><br><embed src="http://lads.myspace.com/videos/vplayer.swf" flashvars="m=5730741&v=2&type=video" type="application/x-shockwave-flash" width="430" height="346"></embed><br><a href="http://myspacetv.com/index.cfm?fuseaction=vids.addToProfileConfirm&videoid=5730741&title=1989 Ford Thunderbird New Model Service Features Clip 2 of 2">Add to My Profile</a> | <a href="http://myspacetv.com/index.cfm?fuseaction=vids.home">More Videos</a>
 
i noticed the TACH has yellow lines before the redline.....i havent seen tha before... i dont reckon mine has it does any one else;s
 
Parasitic loss answer

Thanks blownbird2, that was exactly what I was looking for. Sixty horsepower at 5000 r.p.m is a huge loss! I must go with a turbo.
 
Keep in mind that that figure is going to change depending on a number of conditions such as how fast (engine rpm and OD amount) you're turning the blower, blower type, etc.

-Rod
 
I knew the 5 speeds, at least the earlier models, had a better cam than the autos. Did he say the autos have the same cam as the n/a 3.8? :eek: :( :mad: :confused:
 
Keep in mind that that figure is going to change depending on a number of conditions such as how fast (engine rpm and OD amount) you're turning the blower, blower type, etc.

-Rod

Yup, thats what I was about to say. I would guess that I lose 60 rwhp spinning my blower 15%. I don't think spinning it faster kills it all that much.
 
The 89 5spd had the best cam in it of all the others, but its not that much better to take the time to tear everything down to swap to it, unless you have everything torn down already... then its better just to go get a regrind that will actually do something for your car.

And yes, it will work in the auto cars as well.

Pegasus, the one draw back I see with a turbo and is the reason I won't go with one in the tbird is no matter what, your not going to get a turbo that can give that motor the bottom end grunt that a blower can to get these heavy boats moving. Go with a turbo that can spool fast enough at low RPM and its useless up top. Run a big turbo for top end work, and there goes the bottom end cause a six just ain't gonna give enough exhaust velocity at low RPM's to spool that sucker up to get the torque up to snap you out in the first 60'.

Its a catch 22.. gain on one end, lose on the other.... so don't be so quick to dismiss a blower as crap.
 
The 89 5spd had the best cam in it of all the others, but its not that much better to take the time to tear everything down to swap to it, unless you have everything torn down already... then its better just to go get a regrind that will actually do something for your car.

And yes, it will work in the auto cars as well.

Pegasus, the one draw back I see with a turbo and is the reason I won't go with one in the tbird is no matter what, your not going to get a turbo that can give that motor the bottom end grunt that a blower can to get these heavy boats moving. Go with a turbo that can spool fast enough at low RPM and its useless up top. Run a big turbo for top end work, and there goes the bottom end cause a six just ain't gonna give enough exhaust velocity at low RPM's to spool that sucker up to get the torque up to snap you out in the first 60'.

Its a catch 22.. gain on one end, lose on the other.... so don't be so quick to dismiss a blower as crap.

A turbo can supply plenty of bottom end grunt without being a restriction on the top end...it just needs to be sized correctly. Launching a 5 speed turbo or an automatic equipped turbo isn't a problem either, but your right about it not being an instant boost situation like the positive displacement supercharger is.

Even though is not really necessary, the instant boost could most easily be addressed by boost stacking, where the turbo feeds the supercharger inlet. It's being done right now on supercharged Cobra's with Hellion's new hell raiser turbo system.

David
 
here's the other part of that video guys

<a href="http://myspacetv.com/index.cfm?fuseaction=vids.individual&videoid=5727928">1989 Ford Thunderbird New Model Service Features Clip 1 of 2</a><br><embed src="http://lads.myspace.com/videos/vplayer.swf" flashvars="m=5727928&v=2&type=video" type="application/x-shockwave-flash" width="430" height="346"></embed><br><a href="http://myspacetv.com/index.cfm?fuseaction=vids.addToProfileConfirm&videoid=5727928&title=1989 Ford Thunderbird New Model Service Features Clip 1 of 2">Add to My Profile</a> | <a href="http://myspacetv.com/index.cfm?fuseaction=vids.home">More Videos</a>
 
To turbo or not to turbo

Pegasus, the one draw back I see with a turbo and is the reason I won't go with one in the tbird is no matter what, your not going to get a turbo that can give that motor the bottom end grunt that a blower can to get these heavy boats moving. Go with a turbo that can spool fast enough at low RPM and its useless up top. Run a big turbo for top end work, and there goes the bottom end cause a six just ain't gonna give enough exhaust velocity at low RPM's to spool that sucker up to get the torque up to snap you out in the first 60'.

During the WFC X in Indianapolis, I saw the new Garret ball-bearing turbos in person and was amazed to see the compressor blade spinning with only a gentle breeze. These new generation turbos spool much quicker than the older turbocoupe floating-bearing style. My SC motor also resides in a mustang so I have less weight to get moving. For now I will continue to use my early style blower until I can afford to play with a turbo.
 
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