ported LIM question.

[birdman]

on the stores website it says theres a good loss of power below 5k, im wondering how much are we talking? im kinda on the fence about getting this done. anybody have any experience with it? thanks.

[sil]

lol, maybe its a typo

[SappySE107]

Yeah, sorry for the confusion. If you open up the lower intake too much, it hurts power below 5000 RPM (noticable). I was trying to state that I don't do this, so there is more usable power compared to trying for all 5000+ power.

[birdman]

thanks for the info, i was hoping i was confused.

[z34phoenix]

hey sappy! i ported my lower intake and didnt see any drop in power... i actually saw a slight increase. now, i didnt touch the runers at all... just the lower outlets where they meet the heads. i port matched there and reshaped the opening for the injectors.

it was a lot of work for not much gain. but for me it was a free mod cause i had the tools. from looking at the ports i could see where they werent lined up cause of the carbon build up.

[SappySE107]

Perhaps the issue was total volume removed. I prefer more taper from top to bottom, and opening up the bottom that much means you should take that much from the rest of it. I haven't done any flow testing yet to see what flow differences there are between how the manifolds are done.