miss-piggy

Proper WG placement should always be a priority. In this application, the fagtastic "tear drop" works about 100x better than the solution you've come up with. Big frame turbo or small frame turbo, WG location like that is far from optimal and leaves a weak point in the system. Will it fail at the weak point? Maybe, maybe not. Still would suck in 2017 Steve has his kid fire up the car and gets to the dyno and the damn manifold won't hold boost. Personally, I'd offer the band aid fix in this circumstance of a 44mm WG instead of the 38mm.

As for the drag manifold argument. #1's plugs look different than 2,3,4 but not so much different that you'd say all of the exhaust is pulled out of #1. So you are both right and wrong.

Tom-Guy

Custom one off nothing, angle the goddamn wastegate exit downward.

By the same logic your wastegate clearly pulls from nowhere, since all the exhaust is rushing past the exit to the turbine and has no intention of turning around.

If you don't think there is a pressure bottle neck at the turbine which causes steady state flow originating from cyls 2-4 that eventually makes it's way up cyl 1 runner, you are uninformed. If you don't think there is a pulsed flow that travels down each runner at the beginning of each exhaust valve event, pings off the turbine, and travels back wherever the ---- it pleases without being the least bit impeded by differential (pressure) flow, you are uninformed.

How the ---- do you think reversion happens if exhaust doesn't flow back up runners?

No, let's back up and discuss your engineering background, and the math by which you calculate adequate fluid flow and fluid dynamics. I started off as an ME at Duke when I was 15, in '92, and I'm not exactly a dumbass. I am qualified to form logical conclusions about simple physics, especially when I am the sort of odd duck who compulsively faps to ICE texts for the last decade. Wait, we aren't talking about anything so complex, let's just discuss the merely obvious to anyone who looks at the exhaust's flow path and sees how it has to completely change direction.

I've tuned several hundred more one-off manifolds than you've made, and the concepts involved are elementary. When a wastegate exit is placed in such a manner that boost control is easy vs one where it is not, and all other factors are kept the same, it's real easy to pinpoint the wastegate exit angle as the dog, especially when the exhaust has to come to a complete stop and to some degree reverse direction.

We are discussing the merely obvious here, what you do is a lot of hard work with a little precision measurement and skill thrown in but you aren't a ------- rocket scientist so don't ever treat me like I don't know what I'm talking about again.


How is the GT40 example not valid? The manifold with twice the wastegate area suffered bad boost creep, whereas the manifold with the intelligently designed (but not rocket science) wastegate exit held rock solid. :1

jinxy

This thread has been officially gayed up.

MikeJ-2009

I'd say so. I'll value JD's intellect and mad English assault skills any day, but I'd also like to have my moment with my new manifold if you don't mind. I'm not exactly worried about changing any number of things from season to season as needed with the shuttle, so can we keep from the intellectual talk until I get over my new ish and get it running? Trust me, if there's an issue with anything on the car, including a simple oil line kit, I'll let you know.

(honda myths exposed just as soon as I get done with windows movie maker.)

LilWayne

So where the ---- are those udated pics?

Nate

This concept really should be more widely known. Anyone who has read the book Maximum Boost sould understand how true it really is. Most manifolds would probably be better off if the tubine and wastegate port positions were swapped to give the wastegate the more direct flow.

MikeJ-2009

I've got more pics from tonight, which really only detail getting all the glass back in. Other than that, me and Austin (G2Turbo Terror) put a honda myth to rest.

(Produced by the one and only)

http://www.youtube.com/watch?v=fK9TWPLnoI4

MikeJ-2009

Colin (Snabfxu...) never ended up showing for the wiring. He had ME homework or some ----, so me and G2Turbo Terror ended up drinking, putting in glass, and making videos (shown above).

Nate

Nice vid. Loved the public bashing of h-t.

MikeJ-2009

If it's not HT bashing, I'm not the one.