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      11-10-2012, 12:33 PM   #23
Andrew@ActiveAutowerke
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Originally Posted by pbonsalb View Post
Peak CFM does not show a compressor map. On these motors, we know the Vortech outflows the Rotrex, though the Rotrex appears to be able to flow enough for any stock compression motor running on pump gas.
You are 100% correct. But like you said on a stock compression engine which I think we can agree 99.99% of users have the Rotrex is very capable not just up top but low and mid boost as well.

When we get some Dyno jet graphs you will be able to compare the results and I have no doubt the Rotrex will come out on top.
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      11-10-2012, 12:42 PM   #24
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I would say at least 99.9%. There are only several built motor supercharged M3s that I have read of. Few people will spend another $10k to build a motor on top of the supercharger kit\ and you get only about 10% more power for spending twice as much money.
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      11-10-2012, 12:48 PM   #25
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I would say at least 99.9%. There are only several built motor supercharged M3s that I have read of. Few people will spend another $10k to build a motor on top of the supercharger kit\ and you get only about 10% more power for spending twice as much money.
I could not agree more. If I were going to build this engine I would keep it stock compression with a rotrex on 11 psi. It would be an absolute beast throughout the entire rpm range.
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      11-10-2012, 03:25 PM   #26
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I would say at least 99.9%. There are only several built motor supercharged M3s that I have read of. Few people will spend another $10k to build a motor on top of the supercharger kit\ and you get only about 10% more power for spending twice as much money.

I had to comment this, but that's def off; no one I have seen w/ a built motor is running over 15-20psi and on a built LC motor that will make a very big increase.

I would def do a 9-10:1 over a built 12:1 all day long. Nicer to be able to run higher boost
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      11-10-2012, 04:10 PM   #27
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I had to comment this, but that's def off; no one I have seen w/ a built motor is running over 15-20psi and on a built LC motor that will make a very big increase.

I would def do a 9-10:1 over a built 12:1 all day long. Nicer to be able to run higher boost
A built engine record is around 650 whp right?
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      11-10-2012, 04:47 PM   #28
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I had to comment this, but that's def off; no one I have seen w/ a built motor is running over 15-20psi and on a built LC motor that will make a very big increase.

I would def do a 9-10:1 over a built 12:1 all day long. Nicer to be able to run higher boost
DLSJ5 made 586 rwhp with a VT625 at 7.2 psi on a stock compression motor. He built a low compression motor and raised the boost to 11.2 psi and made 645 rwhp. More than a 50% boost increase, expensive built motor, and he gained 10% rwhp. Definitely worth it for those who can afford it and are chasing every last rwhp, but they are the 0.01%.
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      11-10-2012, 04:53 PM   #29
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Quote:
Originally Posted by pbonsalb View Post
DLSJ5 made 586 rwhp with a VT625 at 7.2 psi on a stock compression motor. He built a low compression motor and raised the boost to 11.2 psi and made 645 rwhp. More than a 50% boost increase, expensive built motor, and he gained 10% rwhp. Definitely worth it for those who can afford it and are chasing every last rwhp, but they are the 0.01%.

yeahs but thats' still not "high" boost. A built sleeved motor should take 20lbs all day long is what I'm getting at. And I can imagine we'll see some 800-900 hp figures soon
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      11-10-2012, 05:05 PM   #30
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You think a Vortech V3 Si Trim will make 20 lbs on a built S65? No way. Not a T Trim, either. Maybe a YSi, so then you probably need custom brackets in addition to a custom tune and maybe better intercooling than what is out there now. Custom dedicated 10 rib belt drive system. Probably race gas also. A stronger DCT trans. A heavier duty 6MT clutch. Sounds like a very expensive project. I like to see other people do projects like this.

I personally would not bother with the centrifugal were I going for 800-900 rwhp. Turbo is the way to go for big power from a relatively small engine. I have had both on my 99M3, a Vortech T Trim running 16 psi and a turbo running 20 psi, but that car is a lot easier and cheaper to mod than an E90M3.
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      11-10-2012, 05:51 PM   #31
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Quote:
Originally Posted by pbonsalb View Post
You think a Vortech V3 Si Trim will make 20 lbs on a built S65? No way. Not a T Trim, either. Maybe a YSi, so then you probably need custom brackets in addition to a custom tune and maybe better intercooling than what is out there now. Custom dedicated 10 rib belt drive system. Probably race gas also. A stronger DCT trans. A heavier duty 6MT clutch. Sounds like a very expensive project. I like to see other people do projects like this.

I personally would not bother with the centrifugal were I going for 800-900 rwhp. Turbo is the way to go for big power from a relatively small engine. I have had both on my 99M3, a Vortech T Trim running 16 psi and a turbo running 20 psi, but that car is a lot easier and cheaper to mod than an E90M3.
A T trim will make a decent amount of boost, but as you said I prefer turbos as well, and I know of a turbo kit for the s65 that's being worked on now. Should be pretty badass when it comes to light
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      11-10-2012, 06:02 PM   #32
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Quote:
Originally Posted by pbonsalb View Post
You think a Vortech V3 Si Trim will make 20 lbs on a built S65? No way. Not a T Trim, either. Maybe a YSi, so then you probably need custom brackets in addition to a custom tune and maybe better intercooling than what is out there now. Custom dedicated 10 rib belt drive system. Probably race gas also. A stronger DCT trans. A heavier duty 6MT clutch. Sounds like a very expensive project. I like to see other people do projects like this.

I personally would not bother with the centrifugal were I going for 800-900 rwhp. Turbo is the way to go for big power from a relatively small engine. I have had both on my 99M3, a Vortech T Trim running 16 psi and a turbo running 20 psi, but that car is a lot easier and cheaper to mod than an E90M3.
This^ But lets come back to reality for a moment.
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      11-10-2012, 06:54 PM   #33
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I see no point in doing a motor to make 100 more hp
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