Aluminium piping. Is it a mistake or not?

[azerty]

Hi all.
I saw many replacing the plastic ducts in their cars with aluminium ones. Hell, I one of them .
But than I read somewhere that the metal is a conductor of heat, and the plastic (the compound from with the piping are made) is heat insulated.
So is it or is it not a good ideea to replace the plastic pipes with aluminium ones?
Are the aluminium pipes going to transfer the heat to the intake air and by doing so to reduce the performance of our engines?
What do you think?

[ddmcse]

thats way you want to get a front facing throttle and intake setup to avoid running the intake right over the engine
http://www.supra.co.nz/ffi/ffi1.jpg

[h8z2luze]

Do they make those for the 7MGE or just the 7MGTE?

[azerty]

Originally Posted by ddmcse

thats way you want to get a front facing throttle and intake setup to avoid running the intake right over the engine
http://www.supra.co.nz/ffi/ffi1.jpg

Man... don't get me wrong...
It is easier to put the plastic back than to change the position of the engine...

[azerty]

Originally Posted by h8z2luze

Do they make those for the 7MGE or just the 7MGTE?

Sorry, but I don't know...
But hey, you can ask them
Here's 1 site seling this stuff. I am sure youfll easely find others.
www.suprasport.com

[cre]

A FFIM on a 7M-GE may not work well. You'll loose the ACIS which helps level out the power band a significant amount and give you more power on the low end.


Yes, the metal does soak up heat quite readily. If you're doing a lot of city driving it may not be worth it. At idle my N/A's intake temps climb as much as 20?F. How quickly those temps drop once the car is moving again depends on how much I get on the throttle, but it takes a few seconds. I'm planning on adding a fiberglass sleeve to insulate it.

I really can't say I recommend removing the resonator... but to understand that you would actually have to research it and learn how it works... so do as you will.

[h8z2luze]

Originally Posted by cre

A FFIM on a 7M-GE may not work well. You'll loose the ACIS which helps level out the power band a significant amount and give you more power on the low end.

Whats ACIS???

[cre]

Forerunner to V-Tec and VVT-i. The manifold is designed in such a way that a large butterfly valve in the surge tank can be used to emulate long or short runners as needed. Without it your power below 4000RPM takes a hit. MKIII and MKIV N/A's both have this system. Other 7M-GE equipped engines (such as that from the Cressida) do not have it and it's part of the reason they make less power.


EDIT: You could of course go with a completely custom FFIM with multiple runners and valving such as the manifolds BMW used with a couple of their newer inline 6's... you're going to need one hell of a crew to help you calculate and cut everything to the precise lengths needed though... If you tipped the engine a decent amount you could build something similar to the old BMW manifolds, but it'll have to be tipped further to still accommodate the stock ACIS valving. BMW M3

[mkiiisupra]

After a long drive down the highway i can stick my hand on my cooleeze pipes where it runs over engine bay and its cool to the touch, not cold but ya kno what i mean.... I can also lay my hand on the intake penlum which is only slightly warm....

Before i changed the pipes i couldnt touch the 3000pipe or the intake penlum..... was much to hot

[mkiiisupra]

All my pipes are ceramic coated though