G37 Dyno Up on Automobilemag.com 50+ HP
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Originally Posted by AlterZgo
Curiously, the Vishnu Xede/Procede on a 335i actually runs a richer A/F ratio. Here's the link to their initial tuning where they mention they are making substantially more power while running a richer than stock A/F ratio:
http://www.e90post.com/forums/showthread.php?t=30027
As for twin turbo setups being unreliable, I would say they are probably less reliable than single turbo set ups (increase the number of turbos and associated plumbing = more things that can go wrong). However, with that said, parallel twin turbo setups, such as implemented on the 335i, are reliable. I ran my modded twin turbo 300ZX very hard for over 60K miles on larger turbos, injectors, dual intakes, etc. without the slightest hint of any engine problems. This included extended high boost running for long, sustained periods.
You get into reliability issues with stuff like the Mazda RX7's twin sequential turbochargers or cars like the Shelby CST? with the variable vane turbos and such which add more complexity to the system.
http://www.e90post.com/forums/showthread.php?t=30027
As for twin turbo setups being unreliable, I would say they are probably less reliable than single turbo set ups (increase the number of turbos and associated plumbing = more things that can go wrong). However, with that said, parallel twin turbo setups, such as implemented on the 335i, are reliable. I ran my modded twin turbo 300ZX very hard for over 60K miles on larger turbos, injectors, dual intakes, etc. without the slightest hint of any engine problems. This included extended high boost running for long, sustained periods.
You get into reliability issues with stuff like the Mazda RX7's twin sequential turbochargers or cars like the Shelby CST? with the variable vane turbos and such which add more complexity to the system.
I understand what you mean though, they can be reliable. Anything can be reliable.
Originally Posted by paranormal
man wtf.. i was all set on the audi s5 even the 335i and now this.. wtf damnit
I might just never buy a car again and just look at all the **** coming out....its like cell phones & sh#t now. You think you got the hottest thing and then a week later its old news.
Originally Posted by jnmunsey
Huh? Everyone's dad had one in between their legs in the 70s. If my Dad did it I know it is ok.
Originally Posted by Hypnoz
Actually you have it backwards. Turbo engines run better in the summer and in higher altitudes than their N/A counterparts.
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I think the altitude thing doesn't affect turbos as much because the turbo can still achieve the same discharge perssurization regardless of the inlet air condition.
I do not agree about the higher temps though. The intercooler suffers greatly as a result.
I do not agree about the higher temps though. The intercooler suffers greatly as a result.
Originally Posted by chilibowl
Are you serious? Why would turbos perform better with HOTTER and LESS denser air? That doesnt make sense at all...I guess Intercoolers are just a novelty to make your front bumper look nice...
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Hypnoz and Trey are right.
An FI car will run a set PSI, fact. If the air is less dense, it will still spool up to the same PSI (maybe take a little longer). Atmospheric pressure at sea-level is about 14 PSI, I think. Go into the mountains with an NA car, and the pressure drops - you feel it a LOT more in an NA car, because now your car is running less "PSI".
Heat kills both.
An FI car will run a set PSI, fact. If the air is less dense, it will still spool up to the same PSI (maybe take a little longer). Atmospheric pressure at sea-level is about 14 PSI, I think. Go into the mountains with an NA car, and the pressure drops - you feel it a LOT more in an NA car, because now your car is running less "PSI".
Heat kills both.
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Originally Posted by chilibowl
Are you serious? Why would turbos perform better with HOTTER and LESS denser air? That doesnt make sense at all...I guess Intercoolers are just a novelty to make your front bumper look nice...
I did not say they run BETTER in heat. I said they run BETTER in heat than N/A engines do. And they run better in higher altitude than N/A engines do as well. It's all about air density my friend.
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I agree with all of your assertions EXCEPT the comment about turbo-tuned cars running better in heat than N/A. From my experience, this is quite the opposite. The 335i/G37 test. After a long day of running, the N/A motor withheld the pounding of abuse. So, if it is all about density my friend...then that would make the air more dense and all that will be forced into the engine will be hot air. Hot air = expanded molecules that take up more room.
The increased elevation theory does make sense. The higher up, the "thinner" the air. Air shoots into the motor a lot easier.
The increased elevation theory does make sense. The higher up, the "thinner" the air. Air shoots into the motor a lot easier.
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Originally Posted by chilibowl
Your dad must have smoked crack in his earlier years and blew the smoke in your face when you were a child. I hope youre being sarcastic kid...