So... after doing some careful consideration, a lot of searching, and contimplating... I found a manifold and purchased it. I was almost htinking of taking my chances with a ebay cast manifold, but decided that wasn't me... Take a look at my find and please give me your input. I wanted cast, not tubular. Thanks!

http://cgi.ebay.com/ebaymotors...90147

 

It looks like a good manifold and the price isn't too bad. I cant see where they put the wastegate, but that's been RevHard's problem for a while...they have bad placement and it leads to boost creep.

 

If you look closly its right above number 2 or 3 whichever but its there.

 

From what i can see, its right above the collector. That's the ideal location for it....

To the OP: Do you have pictures of your personal manifold? If so, you should flip it over and take a picture of it so we can see the wastegate location.

 

I wish I did; I just purchased it this morning. I'll see if I can find 3rd party link... I figured RevHard is deff a trustworthy name and it cost me about $150 more than an Ebay one would've.

They said it's been tested successfully to 650hp on a K20, so would assume they had some control on it boost creeping. Either way, I've dealt with it boost creep plenty of times on my DSM.

One thing I'm thinking I can do to help (if there's creep issues) is keep a high-flow cat on there which would give a little bit of back-pressure without huge power loss to help a tad.

 

IF you run into creep issues, upgrade from a 38mm wastegate to a 44mm. They make a flange that converts from one to the other...i really dont think it'll be necessary though. What are your goals for the build? Do you have any other parts yet?

 

I don't think I'll run into the issue either. I'm probably going to shoot for 300+whp for now... Do you think my stock bottom end can do it without rebuilding it or lowering compression ratio? I have th 06 RSX-S, so CR is 11:1... down the road I'll build the motor with lower compression pistons and aim high with like a gt35r or something similar.

P.S.- I'm still just a trial user so it kinda sucks that I can only post 5x/day.... there a way to have that expire?

 

at 600 hp you probably wouldnt have to worry about boost creep but at 300 its a different story but it looks like its place pretty nicly so I dont think youll have a problem

 

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Boostcreep is based more off PSI and the amount of pressure the turbo generates compared to the efficiency of the wastegate and manifold. you could have boostcreep at 300hp if the manifold or wastegate are inefficient and the turbo is highly efficient (such as a gt35r on a drag manifold) A friend of mine started experiencing boostcreep around 350hp with the old shitty drag manifold.

 

If your turbo matches your goals well and you have a decent wastegate, you wont have to worry about boost creep. Also, 300whp on a stock K series is child's play...they've made nearly 700whp on bone stock K's

 

Does that hold true with the K20Z1 as well? It would seem hard to make crazy HP boosted with such a high comp ratio.