thanks matty.i'll look into some different things. the dp sound useless for what i want.
Thanks
Mat

I wouldn't bother with the DP unless you are going the whole hog i.e. cams, programmable injection, forgies etc. But to answer your question full boost should around the 4000rpm mark give or take 200rpm. This turbo was designed for the SR20DET. I'm not saying don't do it but unless you're after big horsepower you would be better off with a slightly smaller snail.

The GT28BB or 200SX T28 (very similar turbos) will make 150 - 170rwkw on 15psi with basic mods (exhaust, intercooler, chip). This is plenty in an 800kg car for most people and the boost will come in alot earlier.

It might be worth having a chat on nissansilvia.com but be prepared to sort through alot of bullshit........

I have been through all this myself in the past 18 months. I settled on the GTi-R T28 and it is currently making 141rwkw at 10psi. In hindsight I wish I had bought the GT28BB. But your needs may be different. I love circuit racing and at the track I race at the less laggy turbo would be beneficial.
Regards Matty

thanks mate. a couple of other people have also suggested the disco patato. this may sound like a stupid question but how much lag we talking about?

Yeah..Matty is on the money.

Don't get the turbo I did It's too big. Missing a lot of midrange. I've got the GT28 with 0.7 front housing and 0.86 rear. I bumped the boost up to 10 psi by preloading the adjustable wastegate actuator, and it's more fun now.

A low k's S15 turbo would be a good one to use. The Disco Potato if you like a little lag.

Chris

Quote:
Sounds like bs mate,bs

thats bp mate,bp

It hope so shaun,it will be reliable.speaking of reliability, your pp rotary will be oozing with reliability wont it...

Quote:
BORING
whos wants reliability
dont worry mat your ca will give you all the reliability you need

Thanks for that fellas.my main aim for my car to have a reliable cruiser that i can take out at any time and have nothing to worry about.I want a little bit more go but nothing to silly.again thanks for the info, much appreciated.I'll no doubt be on here quite often through the duration of my project.
Thanks, Mat

You need to be more specific with what you're after mate. What sort of power figures are you chasing? What is your budget? What sort of power delivery do you want?

Anything in the T25 - T28 range will fit as it will have the same flange pattern. There are usually small mods that need to be performed to get each turbo to fit i.e. modifying oil and water lines, rotating housings etc. But essentially any of the turbos from this family will bolt up.

My picks -
$200 - $350 - T25G This was the factory turbo on the S13 SR20DET. They are slightly bigger so you will see a power jump with minimal increase in lag. They are very cheap but also very old so may well need a rebuild.

$500 - $800 - T28 There are several different T28 turbos with the most common being the SR20DET factory models which had either a .64 exhaust housing on the Silvia/200SX or a .86 exhaust housing on the Sunny GTi-R. The GTi-R turbo will give you more power but with more lag.

$900 - $1200 GT28BB These are the brand new ball bearing versions of the 200SX turbo and are available everywhere nowadays. Excellent turbos with a very good power/lag compromise.

$1250 - $1500 GT28RS This is commonly referred to as the Disco Potato. Exceptional turbo but possibly overkill on a CA.

This is just a very quick run down on a few of the available options. There is an absolute smorgasboard of choices available to you. It is also a great time to buy as new turbos have never been cheaper.