Big roots blower on LSx
Thread Starter
Joined: Mar 2003
Posts: 10,615
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From: Little Austin
Big roots blower on LSx Just curious what you guys think about having a big roots style supercharger on an LSx engine. Maybe even a smaller 177 or a 256 Weiand. This will work well for conversion into older vehicles like Camaros and Chevelles and whatever else does not need to pass emissions. Ignition can be handled by the new MSD 6010 box that will also allow for timing retard under boost.
Comments? Suggestions?
Thanks,
Andrew
Comments? Suggestions?
Thanks,
Andrew
Thread Starter
Joined: Mar 2003
Posts: 10,615
Likes: 1,883
From: Little Austin
I ama not talking about a little Maggie blower. I mean a BIG one like this:
http://www.holley.com/products.asp?product=77-250CSBP-1
Andrew
http://www.holley.com/products.asp?product=77-250CSBP-1
Andrew
Originally Posted by Stu Cool
Teching In
Joined: Aug 2005
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Originally Posted by Nine Ball
That would be a popular setup for the conversion and street rodder crowd. Wouldn't be too long before T-buckets started running around with Gen III power 
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From: Itasca, IL
Originally Posted by yodawagon
i dont really care too much for t buckets either. too plain.
to be perfectly honest, i cant stand camaros.i think their the ugliest thing on 4 wheels. but ill take the ls1 out of one any day.
just my 2 cents
to be perfectly honest, i cant stand camaros.i think their the ugliest thing on 4 wheels. but ill take the ls1 out of one any day.
just my 2 cents
Look over at LS1GTO.com. There is a guy in the power adder section that but a big blower on a gto. http://ls1gto.com/forums/showthread.php?t=39095
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From: Fat Chance Hotel
I'm curious to see what kind of power an 8-71 would make on a LSx motor like a 402-427ci. But I would want to see injection vs. carbs. That would look real interesting...old school blower sitting on a new school motor.
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From: Baltimore, MD.
Originally Posted by technical
I'm curious to see what kind of power an 8-71 would make on a LSx motor like a 402-427ci. But I would want to see injection vs. carbs. That would look real interesting...old school blower sitting on a new school motor.
Biggest problem is see is efficiency, or lack thereof. A roots blower isn't anywhere near as efficient as a screw type. That lack of efficiency means additional heat. It does have the cool factor though
I think what the LSx series engine really needs is a screw type blower with more capacity. The Magnacharger and such are great blowers, they're just too small to meet the needs of a stout 6.0l or built 408 at any significant boost levels without compromising efficiency.
'Dreamin'
Originally Posted by JustDreamin
I'd be interested to see what that'd do too.
Biggest problem is see is efficiency, or lack thereof. A roots blower isn't anywhere near as efficient as a screw type. That lack of efficiency means additional heat. It does have the cool factor though
I think what the LSx series engine really needs is a screw type blower with more capacity. The Magnacharger and such are great blowers, they're just too small to meet the needs of a stout 6.0l or built 408 at any significant boost levels without compromising efficiency.
'Dreamin'
Biggest problem is see is efficiency, or lack thereof. A roots blower isn't anywhere near as efficient as a screw type. That lack of efficiency means additional heat. It does have the cool factor though
I think what the LSx series engine really needs is a screw type blower with more capacity. The Magnacharger and such are great blowers, they're just too small to meet the needs of a stout 6.0l or built 408 at any significant boost levels without compromising efficiency.
'Dreamin'
Originally Posted by Project GatTagO
I ama not talking about a little Maggie blower. I mean a BIG one like this:
http://www.holley.com/products.asp?product=77-250CSBP-1
Andrew
http://www.holley.com/products.asp?product=77-250CSBP-1
Andrew
yeah...everyone thinks the "magnacharger" is a BLOWER......
GM 6-71/8-71/10-71.....these are BLOWERS!
all it would take is a custom sheet metal intake to install a 6-71 on an LS1....you could either carb it or do speed density SFI.....
TECH Resident
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From: Baltimore, MD.
See, that's the problem. The 6-71's and such have flow capacity over the Magnacharger (which is too small for serious motors, along with the Eatons). But the screw type compressors (and the centrifugals too) are light years ahead in terms of efficiency. I'd bet the old roots type blower is only in the 40% to 50% efficiency range (my guess, anybody have any numbers?). Compare that to a good turbo which is in the 70% to 80% range (depending upon compressor and where in the operating range you're in). I doubt the Magna is at the same level of a good turbo, but I'm expecting its better than the 6-71. And the lower the efficiency the hotter the air entering the engine (and the more power it takes to spin the blower at the same boost level).
As far as the sheetmetal intake, I think it'd be alot easier to hog that manifold out of a solid chunk of alum on a good cnc mill than to do a completely fabricated manifold. Especially since the intake is dry (no coolant to worry about and no fuel to puddle). Would be a pretty good sized billet to start with however, and the machine time wouldn't be all that cheap if you have to pay for it (depends upon your connections).
'Dreamin'
As far as the sheetmetal intake, I think it'd be alot easier to hog that manifold out of a solid chunk of alum on a good cnc mill than to do a completely fabricated manifold. Especially since the intake is dry (no coolant to worry about and no fuel to puddle). Would be a pretty good sized billet to start with however, and the machine time wouldn't be all that cheap if you have to pay for it (depends upon your connections).
'Dreamin'