Efficient IC piping size, I searched couldnt find Options

[eggman40]

I couldnt find a thread that contained this info so i guess ill ask again... what is a good ic piping size to go with? Right now i have 2.5 inch piping mandrel bent... however i just started a job at Graves Motorsports and we make performance exhaust systems in stainless and ti. I can get the stainless cheap there and we have a bender in house. I want to get my pipes redone but wanted to know what size would work best. I was debating between 2.0 and 2 1/4 in. piping. I was wondering which would cause less lag and flow better, or if there is a sacrifice between one or the other. I will be boosting at max 15psi due to cali gas so i guess thats another thing to keep in mind.



One thing that bothers me about 2.5 is that my hood hits it when i close. soo... any help would be appriciated .thanks guys!

[x_itchy_b_x]

ive been told to keep the piping going from the turbo TO the intercooler the same diameter as the turbo outlet. then the pipe going FROM the intercooler to the throttle body the same size as the throttle body inlet. least restrictions possible. also diameter piping doesn't effect lag, at least thats what mr2oc religiously states.

[eggman40]

Sorry mods for posting in wrong place... i forgot i had left the forced induction area



Anyway, thanks Itchy for the info, that works for me. I guess ill use that as my guide. thanks!