I actually do remember 9sec9 posting about this piece and giving MAP the thumbs up for making it, I won't search for it because I dont want to, but it did happen just FYI

 

Pics?

 

This is where our opinion, and I bolded that as in both cases without proof to the contrary it is simply an opinion, differs. You feel that the small area between the wastegate and the turbine outlet completely negates the benefits of a twin scroll housing and I feel that the difference is negligible. You are certainly entitled to your opinion just as I am, but please don't tell me that my product doesn't work properly, it does exactly what it is advertised to do and it does it well.

 

Where are your test results? Dyno graphs? Data logs? As far as I can see you have nothing but an opinion.

 

I say a back to back test is in store.

 

Pics of your work? I'm curious to see it

 

Or you could try the slightly larger 10.8cm twin scroll turbine housing sold here by Meek or GT Pumps .
I'd even go so far as to say that if you're having turbine inlet pressure problems and its forcing the integral gate open you need a larger actuator cannister with enough spring diameter and diaphragm area to keep the valve shut .

I also think that if the combined turbine outlet and gate outlet can't vent properly through your dump/O2 housing then they need the largest outlet and front pipe diameter possible , maybe the Works O2 and a true 3" or 3.25" front pipe section are needed here .

There is always going to be a gas velocity limit through the volute/s of an OE turbine housing and boring the housing out for larger and larger turbines isn't the same as having a properly designed turbine housing for the next family size of turbines up the range .

Why people don't extrude hone these housings to the limit of structural integrity is beyond me .

A .

 

I beleive what Revmoto is saying is right, but attacking a company for not having proof that their stuff works and then not having proof of your own claim is kind of hilarious.

I think there was another guy that did something similar to Revmoto. RSMike jumps to my head for some reason? Maybe it's just because he posted in this thread?

I do recall reading a thread though about a year ago and somebody gave specifics on how much lag it added as they tried both methods. It was like 400+ RPM difference. It's speculation though and it was probably Revmoto.

But something I do recall, 9sec9's car is about the laggiest stock frame turbo car I've ever seen. My car is terrible with a big runner exhaust manifold, but his was even worse. Right up there with BlackcarbonEVOs hacked to hell "single scroll" FP Black on lag.

***I don't mean "hacked to hell" to be a negative or derogatory statement. Just saying a ton of material was cut out of it.***

 

I'm actually lookin into getting a manifold built with a external wastegate and use a bolt of some sort to keep the flapper shut, like the pictures attached. ( This picture was done on a Suby ) but would prob. work. on our evo's

 

Grimmspeed makes a bracket for the Subaru turbo's too. here is a better picture.

 

This would work but it looks kinda hokie, sorta like an oxidized garden gate hinge contraption. I wouldn't want that on my car.

You could just put a spot weld or a dab of JB Weld on the bottom end of the actuator rod at the point where it enters the actuator canister. That is, you'd spot weld the rod to the canister.

This way, if you ever wanted to switch back from your externally gated setup to the stock setup then you just buy a another OEM actuator assembly and bolt it on in place of the spot welded one.

 

Yeah the Grimmspeed bracket looks more appealing than the garden gate hinge thingy.

 

with the help of revmoto i did it a couple of times actually, first try was to make a Y pipe connecting both sides of our twin scroll manifold as seen here but it did not work very well delayed spool a lot BECAUSE IT WAS NOT FULLY DIVORCED!!!! it must go all the way to the seat of the ewg as you can see i did in my second attempt

https://www.evolutionm.net/forums/ev...ock-turbo.html

then got rid of that idea and ended up making a pipe connecting the factory flapper to a flange and mounting the gate right there as seen here which worked mych better and held boost like a champ

https://www.evolutionm.net/forums/ev...ock-turbo.html