RJM GTR Intake Conversion

Originally Posted by Hotrodz

The stock manifold seems to only be good to about 25 or so psi and will let go at about that point. I actually purchased the conversion kit that was used in Hojin's build. I sold it to him after I had conversations with Sebastian, Tony and Sharif about the conversation kit and the benefits or not to my build. The long story short is the kit makes great low end and on a stock block at the most you want to make is about 560 ft lbs of torque and you can achieve that with a stock manifold. I think there maybe some benefits to the guys and gals with a Stillen supercharger that doesn't come close to maxing out the engine internals but for those achieving numbers close to the max without it, I don't see much benefit. Just my two cents!

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Originally Posted by Chuck33079

But if I can swap to the new manifold and make the same power with less boost and timing, that's less heat and stress on the system even if the peak numbers stay the same. That's why I wanted to see some results when just the manifold was changed.

Originally Posted by Chuck33079

But if I can swap to the new manifold and make the same power with less boost and timing, that's less heat and stress on the system even if the peak numbers stay the same. That's why I wanted to see some results when just the manifold was changed.

Originally Posted by RJ MFG

but who in reality settles for the same

Originally Posted by Chuck33079

Who settles for the same? Those of us who would need a laundry list of parts to start pushing more power. It's a slippery slope. Well, all I need is injectors. Oh, and a fuel pump. Well, if I'm doing the injectors and pump, might as well go with a return setup. Now that I've got the fuel system for it, might as well ditch my MBC for an EBC and turn up the boost. Now I'm pushing the turbos, swap in the larger exhaust housings. Well, since the motor had to come out for that......................... wash, rinse, repeat.