Julian's '91 200 20vt

[88a5tq]

Don't worry, there's probably 60 posts to every 1 picture in this thread. I ramble hah
I put the lightest spring in last night after a battle. It's a used tubonetics evolution off ebay. Looks like it came with everything as when new too.
For clarity, I have it controlled by the n75 in stock configuration through the bottom WG port. Only difference is the n75 port that goes to the intake is open to atm. I think I had it that way with the hybrid turbo also. I reset the values to 0 for PID early yesterday to see the effect.

[DE80q]

That was a nice WG in that auction, and I think you are correct in thinking it had everything g it was supposed to. We need more vids now though!

[88a5tq]

I might have Power Rangers Tivo'd... You're right, it's long overdue for vids

[88a5tq]

Wooo! 20 psi with 60 DC on light spring is fun!

[loxxrider]

Nice!

[DE80q]

;) Wooo! 20 psi with 60 DC on light spring is fun!

Awesome! I bet with that turbo you don't need to run the WM as much either! Again, need vids!

[88a5tq]

You're right on the meth. My iat has dropped 10 below ambient already with the logs I'm reviewing. I'm running pretty conservative timing IMO but it is still surprising to feel the power gain.

Also I found chicken fat in my CC

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[loxxrider]

Need more pictars

[88a5tq]

It's just moisture. Not worried about it. I added SS wool to the CC to keep it down in the can and out of the air stream. It's really more of a mayonnaise and there's not a ton of it. Good lookin out tho!

I've lowered my ref DC to 45 since I was spiking to 230 kpa with the pedal down. I'm just trying to establish my base DC before I plug my old PID values back in. Here's hoping they do the truck for a totally different setup too

[loxxrider]

No, pictars of the completed setup and the car in general. And vidz. Lots of them.

[88a5tq]

[img]http://i1243.photobucket.com/albums/gg542/88a5tq/100_0008.jpg[/img

Enjoy the pictars

[DE80q]

That downpipe is amazing! Too bad you really should wrap it up...

[Marc]

the wastegate placement on that manifold is hella shitty for a big turbo to get rid of exhaust flow (note how its competely out of the path of flow from almost all of the cylinders).

I doubt you'll have much luck running low boost on that.

[88a5tq]

Ya it really is a great looking piece of steel
Thanks Marc, I had the same concerns about the flange location. I moved my fuel cut up to 250 kpa from 230 since I keep slamming into it. Not sure how much higher I should inch it up tho..

[88a5tq]

Chris, you ran this setup. What seemed to be optimum for boost and control settings? Just so I'm not spinning my wheels (fingers crossed I will be soon tho ). Was that timing map pic you sent me several months ago for the hybrid the same tune you ran for the h1c? I recall you mentioned a 30r sized snail.

BTW dave it gets hot as feck under the hood on that side! I got burned on the fender lol

[DE80q]

BTW dave it gets hot as feck under the hood on that side! I got burned on the fender lol

That's not good. You are really going to want to get that pipe wrapped before you start blistering paint or melting other needed items.

[loxxrider]

As far as boost control, I'm not sure I can help you becuase you are using a different wastegate with different spring, and your wastegate is plumbed into the downpipe. I can still give you the settings, but I'm not even sure if they're from when I had the hx52 or the h1c.

Yes, that timijg map was from h1c if I said it was from a 30r sized turbo.

I'd stick to 22-26 psi for now at the most until you get everything sorted out.

One note on the wastegate re-route... The coefficient of thermal expansion for stainless is a lot more than for mild steel. That connection is probably going to crack. The downpipe will grow along its length when you get it hot, and will act to shear that connection. I hope it holds up better than I am predicting though!

[88a5tq]

Lol didn't see that coming. Well I guess 26 psi will be plenty fun. Should start that hx screaming. It's slightly quiet now.

Thanks to everyone for their help BTW. This project wouldn't have made it this far without the BTDT's and advice.

[loxxrider]

It doesn't still have the silencer ring in it does it?

[88a5tq]

No sir

[loxxrider]

Sucks that it isn't loud. I imagine it has the anti surge groove cut out (some have the ports but not the groove).

[88a5tq]

Ok so I have the ports but they don't go through the front of the compressor housing. It's like a ricer attempt at an anti surge housing. "Functionless"

I did hear something sounding like surge earlier when the bpv was operating. Sounded badass but idk if it was surge or not. Maybe I wasn't listening hard enough while focusing on the gauges

[themagellan]

I'd also move your breather away from the heat and on the other side. Looks like fun.

[loxxrider]

You sure the groove isn't there? Is like a snap ring groove in the bore of the comp housing.

[88a5tq]

I will check after work but all I have is this shot of the front of the housing. When I had it off to clean I noticed there were no machined opening on the inside that would lead to the anti surge area on the front.

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