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Location:
Hornsby, N.S.W
Registered:
September 2002
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20v turbo intake Plenum! Proven size! HELP
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Thu, 04 November 2004 07:41
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has any one got a proven performance design and capacity for a 20v turbo running a t25 @ 10psi. also what material was used to make it and any pics would be mostly appreciated!!!
cheers
Justin
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Location:
On your mum!
Registered:
May 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Thu, 04 November 2004 10:04
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AFAIK there are no hard and fast rules. I have seen people quote anything from 2.5 times the engine capacity down to 60-70% engine capacity across to "make sure that it is big enough to support the runners that it is feeding!" (ie volume of 1 runner from bell mouth to valve x 4 in this case)
Bigger = less effect caused by the pressure waves travelling back and forth within the plenum and better overall flow.
Small = more responsive.
Result - suck it and see!
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Location:
Syndey
Registered:
December 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Fri, 05 November 2004 02:30
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juzzo
the one that is currently on your car is not that bad size wise, i would make one similer size (slightly larger if you can) but make it neater!
so far that is the best responding 20v turbo that i have tuned so it must be doing something half alright
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Fri, 05 November 2004 14:46
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i was thinking about leaving it about the same size, i just wanted something a little nicer looking and was just thinking that if there is more performance to be had, then why not while im at it!!!
cheers guys!
Justin
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Location:
Melbourne
Registered:
September 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Fri, 05 November 2004 23:21
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Got any pics of your manifold?
Im doing a turbo 16v w/ 20v quad throttles and have some cad/3d studio designs I can get some pics of....
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Fri, 05 November 2004 23:44
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will get some manifold pics up later this arvo!!
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Location:
Melbourne
Registered:
September 2002
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Location:
Brisbane
Registered:
February 2003
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I supported Toymods
Location:
NY
Registered:
May 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Sat, 06 November 2004 05:27
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nice cad work
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Sat, 06 November 2004 06:39
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thanks for your help guys, and yes that CAD work is fantastic!
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Location:
Canberra
Registered:
November 2004
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Re: 20v turbo intake Plenum! Proven size! HELP
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Sat, 06 November 2004 09:31
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Hey dude
intake plenum size on a 20v doesn't mean bugger all in power terms, as the throttle bodies are after the so called 'plenum'. The plenum size does matter on engines that have the throttle body before plenum. Its just a matter of what looks good on a 20v.
regards
john
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Location:
Melbourne
Registered:
September 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Sun, 07 November 2004 01:06
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Actually he has a very good point!
Whats the difference betweent the so called plenum after the throttles and the 2.5" or 3" pipe to the intercooler?
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Location:
Sutherland Shire
Registered:
April 2003
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Re: 20v turbo intake Plenum! Proven size! HELP
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Sun, 07 November 2004 08:46
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the plenum on your car now used too belong to me. it was originally on an n/a 20v and dave modified it for the turbo setup. It's ugly but seeemed to work quite well.
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Location:
Syndey
Registered:
December 2002
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Re: 20v turbo intake Plenum! Proven size! HELP
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Sun, 07 November 2004 22:15
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| Necros wrote on Sun, 07 November 2004 12:06 |
Actually he has a very good point!
Whats the difference betweent the so called plenum after the throttles and the 2.5" or 3" pipe to the intercooler?
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when your at full throttle they both do the same thing, it doesnt care if there is a butterfly before or after it,
its all about air flow!
Dale
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