UrS4 2.2T Avant project
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They are the same size but 10 bladed has 10-15% less maximum flow than the 12 bladed but should spool faster. So for max power find the easy to source 12 blade design. The weight is the same.Bore wash is something you will only find during cold start and warm up, once warm it is no issue unless you use direct injection or changed injector position in relation to the inlet valves. So go easy on cold start enrichment.
Ethanol isn't helping bore wash with cold starts though.
Too bad Thomas, find a case of beer to get over the weekend and find the spirit to fix it. (again) Like Dmitri mentioned not a great deal in expenses but you could miss this like a tooth ace! Make sure you get the right turbine for the Super40, it has a different number of blades and i do think they are somewhat different in size compared to stock HX40's.Go Holset or Go RS4Comment
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In Estonia we have one car with HX40 Super running them on factory gap with E85 with no problems AFAIK.
So I think it should be OK on gasoline too.Comment
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I have a brand new un-used set of F5DP0R plugs. Who wants them? I will sell them cheap.

Audi UrS4 Avant 2.5 20vt - twincharged - Project
Audi 80q B4 Sedan 2.2 20vt - Daily user
BMW 320d Touring e91 M-Sport - Daily user
BMW 740iA e38 - ProjectComment
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Thomas, that sucks big time....
and it was going so well....can I assume you will be rebuilding...and soon...
if there is anything you need give me a shout...Comment
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I can sympathise with this, I remember how gutted I was when I killed my new engine
You just have to keep telling yourself, it will be worth it in the end
I've only just fitted a new set of Bosch plugs, but I've just been online and ordered some NGK's.sigpic
1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racerComment
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I run Bosch F2CS and have no issues... Anyone heard anything cr4p about these?Comment
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Now, when I have recovered from the weekend, have to say that after all it was fun experience. It was nice to meet Dmitri. He is a machine! He is like the guys on Matrix who sees all as zeros and ones. You should see him writing something on the laptop, or explaining how a chip works.

Audi UrS4 Avant 2.5 20vt - twincharged - Project
Audi 80q B4 Sedan 2.2 20vt - Daily user
BMW 320d Touring e91 M-Sport - Daily user
BMW 740iA e38 - ProjectComment
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