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View Full Version : Why get an intake... discussion



A20A1
09-06-2002, 01:09 PM
Here is what i wrote in a different thread but i decided it needed it's own space in Carb Tech.

A carb adapter with a 2.5" (3.0" if you want) intake pipe is good for bottom end.

The adapter that sits on top of the carb acts as a plenum.
(A plenum is the area beneath the carb.)
and since the plenum is moved above the carb, the barrels on the carb now act as runners of an intake manifold.
(The runners take the air fuel mixture from the plenum and delivers it to each cylinder.... Independent runners like with DCOE conversions have no plenum.)
Also the inlet of the adapter plate now becomes a single barrel or throttle body. This is interesting because now you don't have 2 barrels acting independetly but 1 throttle body. Since the opening of the throttle plates are progressive it acts like you only have 1 barrel.

Anyone care to guess why the plenum is better?
I can say thins though... there is a definite distinction between just having a filter and having a filter with an intake.

A20A1
09-06-2002, 01:12 PM
as with all thing there is a draw back... high rpm and top end power will suffer from having a plenum above the carb.
And interestingly enought the same is true for a plenum below the carb... thats why dcoes are so damn sweet. :D

smufguy
09-25-2002, 05:18 AM
sorry to say this, but i am no more a carb guy. Besides, the carb tech and efi tech seems to be like insignificant. :(

A20A1
09-25-2002, 05:24 PM
it's more like project central but fuel system specific.

POS carb
09-30-2002, 07:03 PM
I don't buy your plenum theory :p

I think it's more of a matter of the tuning of having a specific length and diameter of tubing, much like choosing an exhaust or port dimentions for a subwoofer enclosure

A20A1
09-30-2002, 07:07 PM
well it sounded ok... sigh...

Site
09-30-2002, 07:43 PM
LOL.

http://www.rockthelighthouse.com/dcoe_conv/DCOE_CONV_04.jpg !

"thats why dcoes are so damn sweet"

A20A1
09-30-2002, 07:50 PM
Is there a real WKRP in Cincinnati? :D

Site
09-30-2002, 08:19 PM
LOL - no. But the fountain in the beginning of the show - I've been in it.

:D