longtube headers,forced induction and vvel

theDreamer · 12-10-2012, 01:55 PM

Quote:

Originally Posted by Sh0velMan

I have also heard from Stillen that they 100% do not recommend any headers with their S/C setup. Stock manifolds only.

For the same reason, too much valve overlap @ high RPM causing charge to exit cylinder before combustion.

I don't think it's that huge a deal at normal boost levels, but that's what they say.

It all has to do with the SC unit and if it was built properly with expansion in place.
Stillen and GTM really built their systems to function with stock exhaust setups because of CARB requirements, which limits the expansion for headers & exhaust. But honestly, I have ran this setup (GTM Stage 1 SC) and it works great and I highly recommend it.

-Better heat management
-Stock cats will blow and if you are driving while this happens you could possibly suck part of it into the engine bay
-Better flowing exhaust

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