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Engine Specific Info and Questions => IDI Engine => Topic started by: flapjack on April 09, 2007, 03:25:02 pm

Title: Exhaust manifold diameter question
Post by: flapjack on April 09, 2007, 03:25:02 pm

I'm making an exhaust manifold for a 1.6td. The flanges will be 1/2" thick and transition from the oval opening on the head to a round opening.  
Should I keep the same x-sectional area or go bigger?
The turbo is a k14, maybe T3
thanks :)

Title: Exhaust manifold diameter question
Post by: AdAm84 on April 09, 2007, 05:15:06 pm

i'd make it expand out if at all possible. that would decrease chances for reversion.

Title: Exhaust manifold diameter question
Post by: flapjack on April 10, 2007, 11:12:44 am

you tried it? how much bigger?

Title: Exhaust manifold diameter question
Post by: AdAm84 on April 11, 2007, 03:50:01 pm

i've never tried. but an old engine builder taught me to port heads and thats the principle we use. you make every thing expand in and out to keep reversion at bay.

Title: Exhaust manifold diameter question
Post by: SMOKEYDUB on April 11, 2007, 04:01:02 pm

you wont gain any performance if you dont have anything else done to the engine. Why not just port the stock td manifold

Title: Exhaust manifold diameter question
Post by: flapjack on April 12, 2007, 02:57:13 am

I would, but the stock exhaust manifold won't fit with the g-60 intake manifold.