Tuning of D15Z6

General discussions on EJ9 and D14 improvements. How far can you reach?
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xappp
Posts: 1
Joined: Wed Jul 01, 2026 11:20 am

Tuning of D15Z6

Post by xappp »

Hello guys i need a bit of help or some directions on my build. I have a d15z6 engine wich needs a big service consiting of new pistons rings gaskets water pump etc.
I am thinking about modding my engine a bit. I am planning to order p29 highcompression pistons from d16y8 skunk2 intake manifold with 66m throthle body 3.1kg flywhell and stg2 clutch. Also paired with 3inc exhaust and SRS exhaust manifold.
I am also thinking the engine will need a tune after this since im bumping up compression a bit.
And I need help in this area i have an cobra rtp w p28 computer Am i going in the right direction w my build #FUCKBSERIES cuz its too expensive here

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Dodo Bizar
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Posts: 2013
Joined: Mon Jun 22, 2009 10:36 pm

Re: Tuning of D15Z6

Post by Dodo Bizar »

Hey man, don't go overboard with exhaust diameters. Keeping diameters relatively small on runners and midpipe is key (though slightly bigger than stock is ok). It's not all about flow restriction, there is also a lot in pulsing speed which is governed by speed of the flow for a large part. Going 3 inch is big turbo land, not the stuff you want no NA 1.6 liters (yes that also goes for B-series).

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