NS Dev
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| posted on 23/8/09 at 10:51 AM |
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Turbo inlet manifold for Vauxhall XE engine........
Right, long story but cutting to the chase, i need to make an inlet manifold for an XE engine which will be safe with 30psi of boost.
My TIG welder is broken on AC setting so I cannot weld aluminium at the moment. I have a chap locally who can do it for me BUT, I'm wondering
about making it in stainless steel anyway.
It would be a touch heavy, but then I was thinking about the thicknesses involved, and that I could do it in 1.2mm stainless, but would want at least
3mm in ally, and that then the weights become more comparable............ (still heavier in stainless but nearer)
What does everybody reckon?
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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CraigJ
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| posted on 23/8/09 at 10:59 AM |
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Why dont you get an inlet manifold from the c20let. should bolt right on.
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NS Dev
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| posted on 23/8/09 at 11:03 AM |
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yep but no use, anything over about 15 psi boost and it will melt two pistons! The inlet manifold suffers very bad boost mismatch issues between
cylinders, that's why all the cars using lots of boost have fabricated inlets
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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the_fbi
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| posted on 23/8/09 at 11:04 AM |
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iirc the SR20DET manifold has been used before.
Ok, missread 
Inlet.
[Edited on 23/8/09 by the_fbi]
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NS Dev
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| posted on 23/8/09 at 11:05 AM |
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will check on that one, we've used the nissan EXHAUST manifold, but never the inlet,,,,,,will have a look
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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the_fbi
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| posted on 23/8/09 at 11:08 AM |
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quote:
Originally posted by NS Dev
yep but no use, anything over about 15 psi boost and it will melt two pistons!
Hm.. standard boost on a LET is over 15psi, so I don't really think thats a fair comment.
If you use a fabricated tophat it'll help flow to those cylinders too. The standard one is biased.
2 and 3 piston issues are also due to the location of the turbo, making that area very hot.
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Volvorsport
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| posted on 23/8/09 at 11:30 AM |
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16g - if you need anything cut and rolling with holes in , give us a shout .
www.dbsmotorsport.co.uk
getting dirty under a bus
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MikeRJ
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| posted on 23/8/09 at 11:54 AM |
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quote:
Originally posted by the_fbi
quote:
Originally posted by NS Dev
yep but no use, anything over about 15 psi boost and it will melt two pistons!
Hm.. standard boost on a LET is over 15psi, so I don't really think thats a fair comment.
10 psi is standard on these engines.
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the_fbi
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| posted on 23/8/09 at 02:04 PM |
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quote:
Originally posted by MikeRJ
quote:
Originally posted by the_fbi
quote:
Originally posted by NS Dev
yep but no use, anything over about 15 psi boost and it will melt two pistons!
Hm.. standard boost on a LET is over 15psi, so I don't really think thats a fair comment.
10 psi is standard on these engines.
Its been a few years since I actually drove mine, memory is a bit rusty.
Standard is 10-11psi on OB, I'd forgotten mine has p2 so is 15 standard and 18 OB.
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oadamo
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| posted on 23/8/09 at 04:10 PM |
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just make it out of mild steel. 
adam
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alistairolsen
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| posted on 23/8/09 at 04:49 PM |
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standard is 8psi with 10ob, ph2 is 16psi with 18 ob.
Mismatch isnt related to boost level but flow, s engines use other inlets over a certain power.
Ive seen 350bhp made on a standard inlet.
My Build Thread
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001Ben
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| posted on 23/8/09 at 09:05 PM |
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C20XE Turbo manifold -
Ebay Linky
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alistairolsen
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| posted on 23/8/09 at 09:28 PM |
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Thats a weird looking inlent manifold!!
My Build Thread
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NS Dev
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| posted on 23/8/09 at 09:40 PM |
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Well, easy answer to the above discussions, we already have an XE making 400hp or so, which melted 2 + 3 until we made an inlet.........
however, that was made when my tig would weld ally, now the balance control won't work (well its not got one its fixed and fixed wrong! ) and I
can't afford to replace or fix it at the moment.
So.........is a stainless inlet a sensible idea of should I just sub the welding out and do it in ally?
(PS, the exhaust manifold in the pic from ebay is an XS Power one and sadly they fall apart, again speaking from experience! )
[Edited on 24/8/09 by NS Dev]
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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NS Dev
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| posted on 24/8/09 at 06:20 AM |
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quote:
Originally posted by alistairolsen
standard is 8psi with 10ob, ph2 is 16psi with 18 ob.
Mismatch isnt related to boost level but flow, s engines use other inlets over a certain power.
Ive seen 350bhp made on a standard inlet.
Yep, sorry, I did really mean that it was a flow imbalance but didn't really explain myself very well!
cheers
Nat
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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alistairolsen
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| posted on 24/8/09 at 06:56 AM |
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A lot of the cossie guys use the so called swedish plenum over the original backplate which is just a folded welded cover.
Something like that would be easy enough in stainless.
Another option is the nissan sunny gtir plenum which are cheap and cast allow as here:
http://www.vauxhall-sport-forum.com/phpBB2/c20let-westfield-project-t2570,start,60.html
Inn both cases the difficulty is the balckplate. Easy enough to fab something up from carb trumpets and tubes I suppose but comes back to your easier
in ally than stainless!!
My Build Thread
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westy turbo
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| posted on 24/8/09 at 07:53 AM |
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Iam gonna adapt a audi s3 inlet,with a nice 60mm jenvey job
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