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| Home > Help Needed / General Tech Chat > pro's & cons of an external wastegate? what are they | |||||||
 2054 Posts Member #: 452 Post Whore Chester, UK |
13th Oct, 2012 at 12:51:50pm
mines a 38 i think
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 8215 Posts Member #: 90 Post Whore Somewhere around Swindon |
13th Oct, 2012 at 02:19:51pm
if you look for an external wastegate from the likes of an audi s2, audi100 ect with the 5cyl turbo they have a small 30mm external wastegate and the spring can be changed iirc Crystal Sound Audio said:
Why wolfie...you should have your name as Fuckfaceshithead ! "A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools."-Douglas Adams |
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8215 Posts Member #: 90 Post Whore Somewhere around Swindon |
13th Oct, 2012 at 03:02:49pm
also if a 38mm aftermarket wastegate is to big could a 30mm flange be made for example to bolt the wastgate onto? would this have the same effect as a 30mm valve? Crystal Sound Audio said:
Why wolfie...you should have your name as Fuckfaceshithead ! "A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools."-Douglas Adams |
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3594 Posts Member #: 655 Post Whore Northern Ireland |
13th Oct, 2012 at 04:06:18pm
On 13th Oct, 2012 wolfie said:
also if a 38mm aftermarket wastegate is to big could a 30mm flange be made for example to bolt the wastgate onto? would this have the same effect as a 30mm valve? not really, the issue is basically the area that is exposed as the valve opens. The larger the valve the bigger the transition of flow from closed to open, rather than a nice progressive change relative to what is needed. A god quality 38mm may well work fine, and work very well. But there would be a small element of risk. Worst case it might spool slightly slower, and boost may oscillate a little But I have seen people using cheap 60mm gates on 2.0 engines and they seemed to work ok. IMO unless you're near 1000bhp with a single blower, 60mm is huge !! If you really want an external gate, just try it and see. More than likely it will be fine. 9.85 @ 145mph
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 1755 Posts Member #: 8852 Post Whore leicestershire |
13th Oct, 2012 at 05:09:39pm
mines a 38. from the research ive done. bigger the better seems to be the thing.
13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat! |
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 1183 Posts Member #: 6926 Post Whore Accrington |
13th Oct, 2012 at 05:27:47pm
yeah, good point. i was thinking of the smaller flange.
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1183 Posts Member #: 6926 Post Whore Accrington |
13th Oct, 2012 at 05:29:11pm
this might be of help to people wanting one who have the standard turbo
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1755 Posts Member #: 8852 Post Whore leicestershire |
13th Oct, 2012 at 06:01:08pm
seen them but theyd stick a t3 down and out further, probably make it hit the bulkhead alot more and piss the oil return off 13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat! |
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1183 Posts Member #: 6926 Post Whore Accrington |
13th Oct, 2012 at 06:18:39pm
true, im going to try and sod the external wastegate idea. too much money for nothing. ill just have to stick to a smaller turbo for now. |
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1755 Posts Member #: 8852 Post Whore leicestershire |
13th Oct, 2012 at 06:43:53pm
what turbo you using again? 13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat! |
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2054 Posts Member #: 452 Post Whore Chester, UK |
13th Oct, 2012 at 07:25:09pm
you cant actually buy a t3 housing with a 2 bolt gate flange on it around the turbine housing; from the usa though |
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4309 Posts Member #: 1321 Post Whore Wiltshire |
19th Aug, 2016 at 07:30:14pm
About to turn my attention to another k1100 manifold.
On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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