406Honda

What size throttle body would be best for a b16 turbo around 400whp? Do bigger throttle bodies even make a big enough difference in boosted applications? Also what would be the best intake manifold, or is the stock one fine for this power level? thanks guys.

TheShodan

iTrader: (14)

There's some increased responsiveness gained from larger throttle-bodies, but not "make it or break it" differences. Believe it or not, even the stock Throttle body can withstand 400whp without any issue. Including your stock intake manifold. There's no need for a Victor X or anything of that sort as of right now for that power level.

rich7777

Thank you for that information. That's save me some cash!

Turbo-LS

iTrader: (4)

I agree with Mac stock TB will get the job done and only some throttle response is increased and makes more difficult to tune part throttle the larger the TB gets. Stock Intake manifold will work but for 400whp I personally feel a skunk2 or blox or performer x manifold will give all around increases. And the victor x is overkill and will sacrifice low end for top end

wantboost

iTrader: (2)

The kind that open and close... And controls air flow

nealnanoHX

Yep stock TB and intake mani will be fine. I am planning for boost on LS Vtec and I have not even looked into changing the TB or intake from my stock B16 units (B16 head LS Vtec). I plan for 280-300whp on stock block and 400+ on a built bottom end and even for this setup I have yet to look into larger intake mani or TB but I may go with ITR mani and TB.

wantboost

iTrader: (2)

The ITR manifold is nice.. I would at least port match it. I personally am running a skunk2 pro manifold and a skunk2 70mm tb... I am in the process of port matching it and cleaning up some of the casting flaws.