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JUN Plenum installed. The results!

600hp

By 600hp,
in Engines & Forced Induction

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  • 2 months later...
ISL33P Proficient

ISL33P

Posted
Posted

sounds like the car is hunting. it not have an airt leak or leaky bov at all. it is casued by excessive vacuum in the plenum which most computers can not compensate for at idle. i have sent it on several cars and it is nothing to be worried about. usually happens with the installation of a larger (aftermarket) plenum.

the idle will always vary between a certain range e.g. 800-1000 rpm.

discopotato03 Grand Master

discopotato03

Posted
Posted

I'm curious to know if it has aggressive camshafts in it as that would show up as reversion with a single common throttle plenum manifold . I think Nissan used the std multi throttle system so that longer overlap cams , that breath and scavenge well , don't get the reversion problem .

Could the noise be a boom box effect from having all the inlet ports open to the plenim volume . Jun being aftermarket may not have put much thought into sound suppression .

Also the high power engines that use these inlet manifolds , do these have huge turbos sort of flat out or nothing power delivery ? I'm curious as to why you would use this with more response friendly turbos . Please note I'm not having a dig at you just wondering about maximum effort manifold with road user friendly turbos - would they compliment each other .

Cheers A .

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