Ported intake manifolds

[BmacIL]

In short, the openings in the manifold that feed the inlets to the cylinder head are profiled and sculpted to provide optimum airflow.

See link:
http://www.supersixmotorsports.com/_pdf/3.8_4.2/SSM2013Cyclonecatrev3IntakeManifolds.pdf

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[LuckyMe]

I doubt it's 10 hp because I feel more gains than when I put my axle back on and we all know that was a huge gain near 10-15 like zach said. His zero to sixty greatly increased as well.

 

[FireHive]

I'm still surprised/ perplexed the ECU is handling it very well. Ported intakes are a relatively "serious" mod. I would have honestly thought a tune would have been needed

 

[thehunterooo]

Is there a dyno for the axle backs? I don't think you could get that much from axle backs alone.

 

[BmacIL]

Is there a dyno for the axle backs? I don't think you could get that much from axle backs alone.

I didn't see a dyno, but zackmd1 went from consistent 6.0 0-60 runs to consistent 5.5 runs immediately after his custom axle-back. That's a very significant gain (20-25 HP at the least). The stock mufflers on all the S550s are very restrictive. Others have also reported very noticeable SOTP gains from axle-backs.

 

[Jfo777]

So after fighting a long week with the flu i was finally able to install my new intake manifolds and it took about 2 hours and the installation went quick and easy but the only problem (i'm not sure if it is a big problem tho) is my mechanic said he didn't need a torque wrench and continued to bolt everything with his electric wrench. He has 30 years + experience, packed everyday, and he's like family so he did his best. I didn't question him. It honestly feels like a different car now, the low end gives you that push in the seats and it holds you there. I don't know why the top end feeled weak to me but it's great now, i usually would start accelerating faster than my friend but he would catch up, now he isn't catching up so easily. The torque increase throughout the powerband is greatly noticeable. It just wants to leep forward. Another thing i noticed is that the intake manifolds are drenched in oil, i've only driven 800 miles, i even installed a catch can around 500 miles and it still had quite a bit collected in the can. I would definetly get this mod if you want a new feeling to your top end and i installed the K&N air filter and modified the airbox for more airflow.

Please reply back after you torqued down the manifold. I've been wanting to do this but not at the price of a messy engine and now I'm also curious if you have to keep an eye on your dip stick? The website says to use a catch can, does it catch all of it? Sounds scary having your oil leak like that on a normal basis. New car costs and all.

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