What turbo should I buy? Options

[turnaround89]

I am getting ready to turbo my 1.8L engine. And I already know that you can't turbo a 914. But, what i would like to know is what are good cars to get turbo's off of?

I am looking for a small turbo that will spool quickly. Looking to run about 7 to 10 pounds of boost.

What turbo'd cars will give me a good turbo to use? I have been looking for ones on ebay, but don't really want to buy one there. I don't mind buying a used one, so going to the junkyard and getting one is definitely an option.

Which turbo?

[turnaround89]

Would have replied sooner, but i had to work today.

Nein14, that rpm range would be perfect for what i want to do. 1800 to 5500 is perfect.

I would like to run at least 7.5 psi, and maybe up to 10psi(thats a big maybe)

On the first link to an ebay turbo, what is the giant gold piece hanging off the turbo, i see those on a lot of turbo's but haven't been able to identify what it actually is? What is it?

Thanks for the links everybody. I have been reading these two links if it helps anyone
Turbo Torque
Turbo Type I engine

The second link is the one i have read and reread, that setup is what i am going for. Also, its a vw engine, so that helps a lot too! (IMG:style_emoticons/default/biggrin.gif)

The only issue i am having is since i am using a draw-through setup, the turbo has to have a CARBON seal, a dynamic seal won't work, at least thats what ive read. The gas would eat through the dynamic seal. I'll have to ask the people selling the turbo's on ebay if they have carbon seals, and if they don't, can they be rebuilt to have a carbon seal!

How do you know when you buy a turbo what rpm it will spool up at and when it will trail off?

Ebay Turbo with wet float bearings

With this ebay turbo, i really like this one, but it is a stage 3 turbo, isn't that a little large for my motor? Also, the 25-35psi is peak performance, i take it i can externally wastegate it to my preferred 7.5 to 10?

Thanks so much everyone. Once i find the right turbo, i will start a build thread. I have to finish off my hell hole area first and then start with the turbo.

[RJMII]

On the first link to an ebay turbo, what is the giant gold piece hanging off the turbo, i see those on a lot of turbo's but haven't been able to identify what it actually is? What is it?

There is a little diaphraghm in there that pushes on the rod. There is a vacuum/boost line that goes to the manifold that builds pressure inside of the one side of the diaphragm. the other side has the rod on it, which, in turn, opens the wastegate to release exhaust gasses that would otherwise be spinning the impellers.

How do you know when you buy a turbo what rpm it will spool up at and when it will trail off?

The last link that I posted has more information on the other links to the left. there is a very lengthy explanation of impeller ratios, airflow, Volumetric Efficiency, and how they all tie together for which size of turbo to get. EDIT: Direct link to turbo selection page. http://www.ztechz.net/id7.html

Ebay Turbo with wet float bearings

With this ebay turbo, i really like this one, but it is a stage 3 turbo, isn't that a little large for my motor? Also, the 25-35psi is peak performance, i take it i can externally wastegate it to my preferred 7.5 to 10?

stage 3 doesn't really mean much when you aren't using it for the application that it was designed for. the compressor sizes and flow maps for a given turbo will show you more than the designated 'stage 3'.
Yes, you can wastegate it to 7.5 to 10.