I have been researching what LCIP I want to purchase and I am have found two distinct styles of pipe used. One version expands the diameter of the pipe imediatly (Buschur, HPF, Nisei), and others use a section of smaller pipe then smoothly expand to a larger diameter (AMS, OEM).

Version 1 (Buschur)


Version 2 (AMS)


Im assuming both Buschur and AMS (for example) tested both styles of LCIP and decided on which one they thought was best.

It seems to me that version 1 should flow better and make more power, but possibly have worse spool than version 2 because of the increased internal volume of the pipe and corresponding decrease in airflow velocity.

I would be interested in hearing any first hand experience.

 

Both are great. Which ever is cheaper, buy it.

 

the first one because the dia. of the pipe is bigger.

think if it in terms of how the air flows and what the restrictions would be.

 

PPI's LCIP looks like a good compromise between the two styles

 

version 1, why would u want the pipe to transition from smaller to bigger? the 3rd one mentioned above me is garbage the welds look like a little kid made them. i wouldnt worry about the difference in spool it would be little to no difference and u'd pick up power on and off boost.

 

The differences you mentioned would be imperceptible in "on the road" performance and certainly wouldn't show conclusively on any dyno. That said, buy the Nisei if only for the attractive price and support bracket.

 

a aluminum licp will disperse the heat better than a steel unit. as steel is a heat sink.

i like the ppi piece, as it gets bigger sooner & will help cool + offer less of a pressure drop...

will the differences be 10whp, no, but any help is a good thing.

 

well AMS seems to think that its the better way, im just trying to start a discussion


maybe some of the vendors can give their input

 

The shortest is the best........

 

I would go with the larger pipe design that only tapers at the coupler.

 

For flow, it is best for the expansion to come before the bend rather than after it. With the expansion after the bend, airflow is forced to make the unfortunately tight radius bend required for proper fitment, through a significantly smaller and restrictive area. By expanding the piping to a full 2.5" before the bend, we maximize flow and performance.



More pictures and information are available on our site here - http://www.extremeturbosystems.com/p...53jcsnsjbunk20

As always if anyone has any questions be sure to get a hold of me!

Tom

 

No, not another compressor discharge conduct or radiate heat controversy again. It's coming, as soon as the right members jump in.

 

that makes sense, thanks for your input

 

Yea, the ETS / Nisei pipe looks like the right design to me.

 

For reference: Nisei LCIP