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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > About the intake system



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      04-11-2006, 02:01 PM   #1
jjhan85
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About the intake system

HEy guys! I have a question about the intake system...What is the difference between the 325i and the 330i? like the single stage induction and the tripple stage induction, what are those?
and is there a way that you can make the 325i the same or even better than the 330i? Thanks alot guys! you guys are awesome :rocks:
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      04-11-2006, 06:03 PM   #2
tl_boy
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uh oh.... lets see how nice the members are today...



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Originally Posted by jjhan85
HEy guys! I have a question about the intake system...What is the difference between the 325i and the 330i? like the single stage induction and the tripple stage induction, what are those?
and is there a way that you can make the 325i the same or even better than the 330i? Thanks alot guys! you guys are awesome :rocks:
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      04-11-2006, 07:24 PM   #3
ward
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we won't be too tough

the length of the intake runners (length of the path the air takes into the engine) has an effect on performance

shorter may be better for low RPM while a longer path may be better for high RPM power (I may be reversed on that??)

but the 3 stage allows you to not compromise power for high or low RPM's and you'll always have the best possible length runner for best power and torque.

The 325 only has one stage, and it's tuned for low/mid and it gives up power on the higher end while a 330 just changes the manifold a bit and keeps on screaming

somebody's got a picture somewhere of how they do it, I think it's a couple coils that move relative to each other
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      04-13-2006, 12:43 PM   #4
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haha...thanks alot guys
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