internally gated 20g?

[zaebst]

my friend has a 20g, not sure which wheel (i believe it's a tdo5h) with a welded shut t4 housing on it now that was running a manifold mounted wastegate. he said he was playing around with it and tryed sticking it in a stock 14b turbine housing it was perfect. now i am pretty clear on the different 20g options but i have a ported and clipped b16g with the 34mm flapper and ported and polished 7cm inlet on the turbine housing. would it be possible to rig my wastegate actuator on with that 20g and run about 18-20psi? i'm merely looking at this as a very cost effective upgrade for me to do instead of buying a whole 50-trim like i had planned. any input or ideas anybody could give me would be great.

 

[Steve93Talon]

Works fine, runs 11.0s @ 126+, holds 30psi to redline all day long.

You must be logged in to view this image or video.

 

[zaebst]

as it turns out, it is a td05h, which would mean, i assume, that it would connect right up then? because i've heard of guys pretty much making their own "bastard 20g" by doing this before.

 

[DSM90AWD]

Is your friend giving you his 20G
I ask as sound like you are canibilizing your EVO 16G which has a residual value of $300-400 to make it work. If it were me, I'd just sell the turbo and buy an external gate (no risk of boost creep).

BTW.. a T4 housing is a Garrett product. I assume your friend has a TD-05 7cm exhaust housing on the 20G which is the same as those found on 16Gs.

 

[DSM90AWD]

as it turns out, it is a td05h, which would mean, i assume, that it would connect right up then? because i've heard of guys pretty much making their own "bastard 20g" by doing this before.

The "bastard" 20G is basically a 16G Turbo with a 20G compressor wheel. Since it utilizes a 16G compressor housing, it needs to be modified as the 20G wheel is bigger than the 16G.

BTW.. the "bastard 20G" is meant to serve a single purpose, which is to resemble a stock turbo so can be used in Stock-Class AutoX/Drag events. It makes power yes, but would make more in a 20G compressor cover

 

[94Jettameowpsst]

Ya know i remember a LONG time ago wondering if you could put a 20g wheel on a 14b or 16g but everyone shut my idea down. If i would hav eonly tried it :-/

 

[zaebst]

so to answer my question, i could mount that td05h 20g compressor housing up (much like steve93talon did) and run, if i were to choose to do so.

 

[Steve93Talon]

If you look at the pic, you'll see that it's NOT a TD05H compressor housing. It's the standard TD06 housing with 2.5" inlet. I made a bracket to hang the 14b/16g style actuator on it from underneath so that the angle of the rod would match up to the flapper door correctly. If you're using a TD05H comp. housing, then the WG actuator will bolt up just like any other 14b/16g setup.

 

[zaebst]

correction, now that i finally have my information right, it turns out that the turbine wheel is a td05h, but the compressor housing is a standard td06. i see what steve was referring to now about his wastegate actuator. i've got some ideas of my own. i think i might try for this setup and see how it works out.

just to clarify, steve, what turbine wheel/turbine housing is that?

 

[Steve93Talon]

In that pic, it's a TD06H turbine wheel and a Bullseye housing, but it worked exactly the same with a TD05H wheel on a 7cm Mitsu housing. My actuator mounting plate is a variation of this:

http://www.vfaq.com/mods/20G-mods.html

The clocking of the comp. housing is critical, it takes some experimentation to set it up, but it works flawlessly. Just try to preload the rod a couple mm when you fit it to the flapper arm. Too little preload and it'll blow open, too much and you'll lose actuator travel and the flapper won't open enough. I used a compressor to blow into the actuator nipple to test it.