dez6

Im currently doing a d16z6 build. Going to run a Peakboost kit with a 57trim turbo (.48 A/R), Vitara Pistons, FJT I-Beam Rods, Stock Head, Stock intake port matched to 68mm throttle body. Question I have is at what HP level does the intake manifold become a restriction? Im shooting for 300hp on the above set-up.

Ls_dx

iTrader: (5)

I think 300 hp should be fine on a p28 manifold. Thats one of the best stock manifold avail for d series.. other than Y8....?

90blackcrx

Is the head built at all ? 300hp will be achievable on that manifold, but of course it would be easier to make that power on a skunk2 manifold.

tegman23

x2 its not that you cant make the power on that manifold, it would just be easier to make the power with an after market one...

dez6

No stock head will be used. If anything, I would just clean up the casting marks,knife edge the dividers, etc. I know using an aftermarket manifold will help me achieve my HP goals easier. I am on a budget with this build and I could use the $300 for other aspects of the build assuming the stock manifold is not going to be a bottleneck for me.

dez6

Ive read a lot of different opinions on which is a better manifold (Y8 vs. Z6) but I have never actually come across any hard data.

quicksilver1689

meh 400whp has been made with both so dont worry focus otherplaces

niket

it might be harder to make the power without an upgraded manifold, but my feeling is $300 more to a bigger (or ball-bearing) turbo will net you more power than $300 towards a new manifold. oh, and the stock should be capable of up to 400whp goals just from the feedback i've read.