6-7 psi on stock m30
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bmw335is turbo
- Posts: 100
- Joined: Feb 12, 2006 12:00 PM
- Location: Portland ,OR
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bmw335is turbo
- Posts: 100
- Joined: Feb 12, 2006 12:00 PM
- Location: Portland ,OR
[QUOTE="dotrp"]A guy on the bcg list put an Eaton (m90?) from a thunderbird supercoupe in his e24. Haven't heard how it turned out, but he seemed to think it was going to work. No idea how the whole drive belt thing is going to work.[/QUOTE]
That project has been at the shop for at least 15 months.
Todd
That project has been at the shop for at least 15 months.
Todd
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bmw335is turbo
- Posts: 100
- Joined: Feb 12, 2006 12:00 PM
- Location: Portland ,OR
The only reason i even Suggested this is because that is the type of guy he is, that is all he wanted, has nothing to do with loyalty he just does not want a turbo he is a full time student but if he ever changes his mind witch I now he will after he rides in my car He will go TCD
[Edit by bmw335is turbo on [TIME]1108318262[/TIME]]
[Edit by bmw335is turbo on [TIME]1108318262[/TIME]]
the charger I was looking at was a VW G60 g-lader supercharger. Only $100 bucks but they need rebuilt every 50k miles, It's a small unit but costs around $300-$400 to rebuild.
Due to the fact the one I was looking at needs a rebuild I'm going to pass. I also don't like the idea of turboing my car, but vortech superchargers are ussualy way to much money.
Due to the fact the one I was looking at needs a rebuild I'm going to pass. I also don't like the idea of turboing my car, but vortech superchargers are ussualy way to much money.
[QUOTE="rs4pro3"]the charger I was looking at was a VW G60 g-lader supercharger. Only $100 bucks but they need rebuilt every 50k miles, It's a small unit but costs around $300-$400 to rebuild.
Due to the fact the one I was looking at needs a rebuild I'm going to pass. I also don't like the idea of turboing my car, but vortech superchargers are ussualy way to much money.[/QUOTE]
Well, if you don't like the idea of turbocharging your car then don;t even consider SC it. IMHO.
Todd
Due to the fact the one I was looking at needs a rebuild I'm going to pass. I also don't like the idea of turboing my car, but vortech superchargers are ussualy way to much money.[/QUOTE]
Well, if you don't like the idea of turbocharging your car then don;t even consider SC it. IMHO.
Todd
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Craig -535i- Seattle
- Posts: 155
- Joined: Feb 12, 2006 12:00 PM
[QUOTE="rs4pro3"]I didn't but I found a relatively cheap charger putting out 6-7 psi that dosn't look like it would be very hard to fit to an m30, maybe where the AC Compressor is.[/QUOTE]
[QUOTE="rs4pro3"]the charger I was looking at was a VW G60 g-lader supercharger. Only $100 bucks but they need rebuilt every 50k miles, It's a small unit but costs around $300-$400 to rebuild.
Due to the fact the one I was looking at needs a rebuild I'm going to pass. I also don't like the idea of turboing my car, but vortech superchargers are ussualy way to much money.[/QUOTE]
[QUOTE="Craig -535i- Seattle"]Isn't that engine about half of the size of an M30? You sure that would even flow enough air?[/QUOTE]
rs4pro3, Craig is right on here -- a VW G-Lader is way too small for an M30. You can't just say "I found a relatively cheap charger putting out 6-7 psi" -- a given supercharger combined with a given engine and a given drive ratio gives "X" pressure at "Y" RPM, and since the VW 16V engine is 1.8L, you'd only get about 3-4 psi on the M30 at the same drive ratio. To get the 6-7psi, you'd have to increase the drive ratio, but then you'll be heating the air a heck of a lot more -- not good for performance!
If you must use a mechanical supercharger, a better choice would be the Eaton used on GM 3.8s, as in Regal GSs.
[QUOTE="rs4pro3"]the charger I was looking at was a VW G60 g-lader supercharger. Only $100 bucks but they need rebuilt every 50k miles, It's a small unit but costs around $300-$400 to rebuild.
Due to the fact the one I was looking at needs a rebuild I'm going to pass. I also don't like the idea of turboing my car, but vortech superchargers are ussualy way to much money.[/QUOTE]
[QUOTE="Craig -535i- Seattle"]Isn't that engine about half of the size of an M30? You sure that would even flow enough air?[/QUOTE]
rs4pro3, Craig is right on here -- a VW G-Lader is way too small for an M30. You can't just say "I found a relatively cheap charger putting out 6-7 psi" -- a given supercharger combined with a given engine and a given drive ratio gives "X" pressure at "Y" RPM, and since the VW 16V engine is 1.8L, you'd only get about 3-4 psi on the M30 at the same drive ratio. To get the 6-7psi, you'd have to increase the drive ratio, but then you'll be heating the air a heck of a lot more -- not good for performance!
If you must use a mechanical supercharger, a better choice would be the Eaton used on GM 3.8s, as in Regal GSs.
arent all of the Eaton superchargers Roots type or whatever? Wouldnt the turbo looking SC's be easier to install in an engine like the m30? I work for Eaton (they bought the company I work for last year).. so I looked a little at what they had thinking I might be able to get something with an employee discount but I gave up on that idea due to lack of funds..
[QUOTE="graphite"]arent all of the Eaton superchargers Roots type or whatever? Wouldnt the turbo looking SC's be easier to install in an engine like the m30?[/QUOTE]
Yes, Eatons are positive-displacement lobe-type superchargers. "Turbo-looking" centrifugal superchargers look that way for a reason -- their compressor is essentially the same in form and function as the compressor on a turbo-supercharger (note: I did not say they were the same, I said they are essentially the same), but they are driven by different methods.
The problem with centrifugal superchargers is that they don't have the benefit of near-instantaneous low-RPM boost that Roots-types have and that they don't have the flexibility in tuning (i.e. wastegate, spool-up) that a turbo-supercharger has. Packaging and cost are their only real benefits, IMO.
Yes, Eatons are positive-displacement lobe-type superchargers. "Turbo-looking" centrifugal superchargers look that way for a reason -- their compressor is essentially the same in form and function as the compressor on a turbo-supercharger (note: I did not say they were the same, I said they are essentially the same), but they are driven by different methods.
The problem with centrifugal superchargers is that they don't have the benefit of near-instantaneous low-RPM boost that Roots-types have and that they don't have the flexibility in tuning (i.e. wastegate, spool-up) that a turbo-supercharger has. Packaging and cost are their only real benefits, IMO.
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Craig -535i- Seattle
- Posts: 155
- Joined: Feb 12, 2006 12:00 PM
If I may disagree with Shawn ( 
) , the other major benefit to centrifugal SCs is their lack of low end torque and smooth power build up. This makes them much easier to drive when driving on street tires and if you like to drag race launches are also easier.
In addition, on a road course their power delivery comes on slowly rather than in the on/off manner of roots type. On a car that make power in the higher revs I find the centrifugal SCs to be a good match.
[Edit by Craig -535i- Seattle on [TIME]1108408073[/TIME]]
) , the other major benefit to centrifugal SCs is their lack of low end torque and smooth power build up. This makes them much easier to drive when driving on street tires and if you like to drag race launches are also easier.In addition, on a road course their power delivery comes on slowly rather than in the on/off manner of roots type. On a car that make power in the higher revs I find the centrifugal SCs to be a good match.
[Edit by Craig -535i- Seattle on [TIME]1108408073[/TIME]]