1600 turbo build thread

With Turbo and Super charging you can create massive horsepower with vw motors.

Moderator: seabeebuggy

Post Reply
User avatar
panel
Posts: 3628
Joined: Sun Sep 24, 2000 2:01 am
Location: Victoria B.C. Canada
Contact:

Re: 1600 turbo build thread

Post by panel » Thu Nov 16, 2017 11:45 pm

Sounds great!

User avatar
buguy
Posts: 600
Joined: Wed Jan 26, 2005 11:53 pm

Re: 1600 turbo build thread

Post by buguy » Fri Nov 17, 2017 12:12 am

Well after having a chance to run it a bit it seems that as i let it idle the idle rpm increases. Not a lot, but some. Blip the throttle and it goes back to normal, and then rises again. Not sure what's causing it yet but it almost has to be in the carb. It didn't do it with the other carb. I did weld the new flange on, but other than that I haven't changed anything else. I may throw the old carb back on just to eliminate the intake from the equation.

madmike
Posts: 1155
Joined: Mon Jul 24, 2006 5:11 pm
Location: Atlanta,Michigan

Re: 1600 turbo build thread

Post by madmike » Fri Nov 17, 2017 7:13 am

check the floats :wink:

User avatar
buguy
Posts: 600
Joined: Wed Jan 26, 2005 11:53 pm

Re: 1600 turbo build thread

Post by buguy » Fri Nov 17, 2017 12:06 pm

Good call. That or a tiny vacuum leak is all I can think of. Does it with the throttle cable disconnected too.

User avatar
buguy
Posts: 600
Joined: Wed Jan 26, 2005 11:53 pm

Re: 1600 turbo build thread

Post by buguy » Fri Nov 17, 2017 6:25 pm

Float levels checked out. I then just held the throttle shut and it held steady. Perhaps I need a bit stronger return spring. Also just a note, this carb doesn't start any where near as nice as the old carb did. Not sure why yet but I will keep jacking with it. Seems a bit rich when I'm trying to start it.

madmike
Posts: 1155
Joined: Mon Jul 24, 2006 5:11 pm
Location: Atlanta,Michigan

Re: 1600 turbo build thread

Post by madmike » Sun Nov 19, 2017 6:57 am

Does it have the huge 50cc acc.pump shot?

User avatar
Dan Dryden
Posts: 382
Joined: Mon Nov 05, 2007 3:56 am
Location: Kent, England

Re: 1600 turbo build thread

Post by Dan Dryden » Sun Nov 19, 2017 12:47 pm

Could it be a small amount of fuel puddling?
Blip the throttle and the extra air speed clears the intake, so idle drops back to normal.

User avatar
buguy
Posts: 600
Joined: Wed Jan 26, 2005 11:53 pm

Re: 1600 turbo build thread

Post by buguy » Sun Nov 19, 2017 3:04 pm

Only. 30cc accel pump shot. This is just a little stock 1600. I had #34 nozzle size on the 450 carb but this one has #31 and it seems pretty good.
It could have some fuel puddling but it's the same intake I had with the other carb and it didn't do it.

User avatar
Dan Dryden
Posts: 382
Joined: Mon Nov 05, 2007 3:56 am
Location: Kent, England

Re: 1600 turbo build thread

Post by Dan Dryden » Sun Nov 19, 2017 3:12 pm

If the idle air speed was different when using your other carb, the slightest change could make a difference.
Are the venturi the same size?

User avatar
buguy
Posts: 600
Joined: Wed Jan 26, 2005 11:53 pm

Re: 1600 turbo build thread

Post by buguy » Sun Nov 19, 2017 3:40 pm

I believe the venturi size is just a bit smaller on the new carb.
When I held the throttle shut, the idle didn't increase. So I don't know if I need a bit more spring to hold it shut or what. Overall so far this carb doesn't work as well as the old one. Of course the old one was brand new and this one is unknown to me. I really should take a look at the gasket match to the carb too. For some reason I have a feeling it doesn't quite match up. This carb doesn't start instantly like the other one did either.

User avatar
buguy
Posts: 600
Joined: Wed Jan 26, 2005 11:53 pm

Re: 1600 turbo build thread

Post by buguy » Sun Nov 19, 2017 5:22 pm

Hey Dan (or anyone else that may know) I was reading your thread and you said you put a 1.5mm restrictor in the oil feed line for your subie turbo. Can you share where you can get one of those restrictors?

Clonebug
Posts: 2989
Joined: Fri Feb 16, 2007 12:28 am

Re: 1600 turbo build thread

Post by Clonebug » Sun Nov 19, 2017 5:34 pm

The Subaru turbo already has a restrictor built in.
Look inside the oil feed and you can see a small hole where the oil goes into the center section.

Just feed it with a AN-3 or 3/16ths inch feed line and use a 5/8ths inch drain line fairly straight down and you will have no troubles.
Stripped66 wrote:The point wasn't to argue air temps with the current world record holder, but to dispel the claim that the K03 is wrapped up at 150 HP. It's not.

User avatar
buguy
Posts: 600
Joined: Wed Jan 26, 2005 11:53 pm

Re: 1600 turbo build thread

Post by buguy » Sun Nov 19, 2017 5:39 pm

Great. I already have both of those. I'm kind of wondering if I should just skip this turbo and find myself a 9b. It would probably work way better for the type of driving I do. Lots of stop and go here and nothing over 50mph. So mine would be romps between lights.

Clonebug
Posts: 2989
Joined: Fri Feb 16, 2007 12:28 am

Re: 1600 turbo build thread

Post by Clonebug » Sun Nov 19, 2017 7:28 pm

The -9B is one of the twin turbos from a Dodge Stealth. I'm sure it would be an insta-boost turbo for a 1600 since it was from a 3.0L with two of them.
Finding one or finding one in good shape is the question.
Stripped66 wrote:The point wasn't to argue air temps with the current world record holder, but to dispel the claim that the K03 is wrapped up at 150 HP. It's not.

User avatar
buguy
Posts: 600
Joined: Wed Jan 26, 2005 11:53 pm

Re: 1600 turbo build thread

Post by buguy » Sun Nov 19, 2017 9:04 pm

Yeah there was actually just a good one on eBay with the stock down pipe with o2 sensor for $150. I eye balled it and then went to do some research and when I went back to it, it was sold. Oh well. I may keep looking. It appears an 11b or C would be between the 9b and 13t. Might also be a good comprise.

Post Reply