Re: external wg
Re: external wg
Frank said:
Getting back to the problem: I have to fix the sticky wg. Assuming when I pull the turbo there is no other issues with it I can either:
1. Fix the integral wastegate. Never pulled a turbo apart. Wouldn't know what to do. Have a extra stock turbo for parts (ingested something) so maybe I can use the wastegate half?
That'd be the quickest... pull the turbo, remove the v-band and pull the exhaust housing.
Put the new one on.
You can fix the sticky arm without taking the turbo off-
Pull battery cable off.
Pull passenger fenderwell.
Pull downpipe off turbo. (Don't need to take it out, just get it off the studs)
Grind weld off face off WG arm with makita or die grinder. Just get it flush with the arm.
Take a chisel and mark the orientation of the flapper arm to the shaft.
Take a small punch (smaller than the shaft on the WG rod) and pound the shaft off the
arm and into the exhaust housing. Reach in through the DP hole and grab the flapper
and arm.
Take a drill bit and wallow out the sleeve where the shaft rides in. Don't get it too loose
such that it leaks a lot.
Blow all the shavings out as best you can.
Put the shaft/flapper back in, and put the arm back on, aligning the marks you made.
I've got some nickle-based lube that's used in refineries, good to 2000F. I spray that in
there beforehand.
Spot-weld the arm back on with a mig. Can do it with stick too, if you're careful.
Assemble the DP, fenderwell, and battery cable, and you're done.
I will grant that it's much easier to do it while the turbo is out. But it can be done.
2. Have someone else fix the wastegate. Could be too much downtime on Sy. Although I see that larger wastegate flappers can be installed which may help with boost control. Of course, I do not know if this would be allowed in stock turbo class (doubt anyone would know but I do not want to cheat).
3. Weld (or wire if I am too lazy to pull the turbo) the wg flapper closed and install a external wg that I already have. Only cost to me would be a couple of flanges and some 1.5" pipe. Even have a extra cross over pipe. Really not sure yet if it would pass emissions testing with this setup (think that if not under boost it should pass). Most likely would also use a electronic boost controller vs. the ultimate chip boost control (wonder if this would be permitted).
Personally, I don't see a difference between the two. If a modded stock exhaust housing is legit, than an external WG shouldn't bug anyone.
Really, as long as the stock size wheels are used and the stock size compressor cover and turbine housing are used, that should be all that's required.
My .02.
