Dual port? evo9 turbo...

[Fourdoor]

Originally Posted by Warrtalon

Well, I think you're confused. The dual port is the old style, and the IX turbo already has the new style single port. The single port is the IMPROVED version, so purchasing and installing an old dual port 10.5 would be a step backwards. The dual port wastegate is what the old 9.8s had and what the TME 6.5 had (10.5). As of 05, we all start getting single flapper 10.5 hotsides, which are the improved version.

I'm curious...what would make you think to buy that extra hotside when 1) your IX turbo comes with the best one possible, and 2) your CURRENT 05 turbo ALSO has the best one possible. So, you'll have 2 10.5 hotsides with updated single flapper wastegates in your possesion and were about to pay another $220 to get an older style one.

I'm not sure why they lied about the dual flapper providing larger flow area with greater boost blah blah blah when that is the old style that is outdated. Very, very disappointed that they would try to trick people like that.

They are not lying about the flapper, they read my posts about it on that other evo web site, concluded that I am correct, and are using my information as a marketing tool.

The new design is "improved" in mitsubishi's view because it has less moving parts, so cost less money to produce. I never heard of ANYONE no matter what O2 housing they were running getting boost creep until the 05 EVO's with the single port 10.5 housing.... now you see threads about it all the time on that "other" evo web site about it. At first I thought we had a bunch of people who didn't know what boost creep was, but some of them are very knowledgeable. After a while I noticed that it was only people with the "updated" 10.5 housing that were getting creep.

Warr, does the porting Buschur does include porting out the wastegate passeges? If not, then get yourself some cams, and other mods to improve the intake flow of your engine (larger FMIC, IC pipes etc) and you will start getting creep as well..... at that point you can either port the crap out of your single flapper flow passages, or switch to the dual flapper 10.5 housing.

Keith

[Warrtalon]

I have cams and no creep, but stock IC system for now. On the hotside, the porting was extensive, but I think it was moreso on the wheel side, not the wastegate side. Also, I run alky and am now at huge altitude, so creep is pretty much impossible. My boost already tapers from 26psi to 16psi - it simply can't flow anymore than it is. When I had these mods before installing the alky and at sea level, I could run pretty much a flat 19-20psi using my Forge WGA, but no creep issues then either.

I have seen no indication whatsoever of improved performance or anything claimed by Gruppe-S with the dual flapper 10.5 hotsides.

[Fourdoor]

Originally Posted by Warrtalon

I have cams and no creep, but stock IC system for now. On the hotside, the porting was extensive, but I think it was moreso on the wheel side, not the wastegate side. Also, I run alky and am now at huge altitude, so creep is pretty much impossible. My boost already tapers from 26psi to 16psi - it simply can't flow anymore than it is. When I had these mods before installing the alky and at sea level, I could run pretty much a flat 19-20psi using my Forge WGA, but no creep issues then either.

I have seen no indication whatsoever of improved performance or anything claimed by Gruppe-S with the dual flapper 10.5 hotsides.

Forgot you have the cams now, I remember how well you did without them though

If you didn't see gruppe-S making claims why did you say they lied to him about it

In the original post the guy quoted gruppe-s site about the dual flapper potentially having better boost control and less chance of boost creep. It is under the link he posted, go to the description of the dual flapper 10.5 housing.

The people having boost creep issues are trying to run 20 to 22 psi on pump gas with the stock 05 turbo (single flapper) with upgraded O2 housings. Boost creeps up to 24 to 25 psi in the mid range, and then has the normal tapper back down....

Keith

[Warrtalon]

No, I was saying that the claims Gruppe-S made have not been substantiated ANYWHERE that I've seen. I know what they claimed - I was appalled they would try to get people to buy the older style hotside by saying it controls boost better. 05s and 06s with the single flapper 10.5 have been destroying 03/04s with the 9.8 hotside, but there haven't bee any random dual flapper 10.5s outperforming single flappers. This boost creep issue, though existant, is not fully explained. There have been many many 05s with all sorts of mods but no boost creep. I myself had no boost creep when I first installed my o2 housing.

Regardless, I think you'd agree that it would be senseless to buy a IX that already has a single flapper hotside and then go and purchase a dual flapper hotside just to replace it.