[quote pid=3998 author=Andy date=1220897904][quote pid=3911 author=breadman date=1220649751]Unfortunately the Garrett GT series turbos are a bit out of my price range. The smallest of the roller bearing ones is the GT25 and that's too big anyway. GT22 in the right trim could be used, but again its all more money.
I think I'll end up going with the tried and tested Rothe manifold and K03. As I said at the beginning, I'm gonna be a sheep and follow the herd![/quote]
Thing is, unless you're willing and able to put in the time/money to do all the research to make the right turbo choice for yourself, following the herd is the easiest route.
Not sure what's making you say the GT25(54) is too big - I think it might be quite well matched, if the roller bearing technology giving quicker spool-up is as good as it's cracked up to be. I'm trying to save up for a house at the moment, so doubt it'll be me that tries it first! A Garrett GT17 from a Saab 9-5 LPT might not be a bad choice either - good for 230bhp when pushed on a chipped 2.3l 16v 9-5 motor.
Rob makes a good point though - there's still lots of minor tweaking to be done with a K03 yet. E.g. Yoof's pushed it with nitrous, but still isn't making the most of it running Digifant. I've not put nitrous on mine yet (nor re-fitted my Aquamist) because I've still not finished tinkering with Emerald. That's ignoring all the messing about with camshafts, cylinder heads, inlet manifolds etc. that could be done.[/quote]
The reason I think the GT25 54 is too big is from the information I got from the Garrett website. They state it's most suitable for engines between 1.4 and 2.2 litres in capacity and for making between 170 and 270bhp. If I was running a 1.8 250 bhp engine it might be ideal, but I'm not.