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Martijnus
Joined: 29 Dec 2006
Posts: 2019
Location: Netherlands
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 Posted: Tue Feb 26, 2008 8:37 am Post subject: |
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I've got stock cam and stock exhaust.
Stock cam was advised to keep my low end power a bit.
Well...another reason to get lpg... it has to be driven top rpm 
About my runner lenght... the filters go directly on the itb's...so the whole length from valve to end of airfilter would be about 30cm or so...as seen on the pics.
edit: with 30cm runners my max power rpm will be 6000 rpm... that's quite a bummer I need 70cm @ 3000rpm
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)
924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment  |
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Rich H
Joined: 10 Jun 2007
Posts: 2665
Location: Preston, Lancs, UK
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| Posted: Tue Feb 26, 2008 8:53 am Post subject: |
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Yes byut what wave is that?
As I understand it the lower the number of the wave the more effect it will have. So if you upped the wave number you might have some benefit. It's all academic until you finish it all though!! 
Rich
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec |
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Martijnus
Joined: 29 Dec 2006
Posts: 2019
Location: Netherlands
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| Posted: Tue Feb 26, 2008 11:02 am Post subject: |
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| Rich H wrote: | Yes byut what wave is that?
As I understand it the lower the number of the wave the more effect it will have. So if you upped the wave number you might have some benefit. It's all academic until you finish it all though!!
Rich |
yeah that's right... Everytime I don't calculate stuff it appears it was nearly perfect...so apparently I've got the magic skilzz.
We'll see...
edit: I've thought about variable runner length... one month later yamaha introduced their variable intake length...damn japanese...
when I was young and I was playing with my lego, I wondered why valves had such a strange controlling principle... while steam engines use some sort of crank for their 'valve'... so I thought ...why not do the same in combustion engines... but ducati has made that well over 25yrs before my birth...but I came up with the idea too...same as the W engine (VW) ... but at 6 I thought that 2 complete engines couldn't be synchronised... (well early '90's maybe that really couldn't be done...) but guess what..
so anyway... I have a lot of confidence in my own design and pseudo calculations and if it doesn't perform... I know I was wrong.
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)
924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment |
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Rich H
Joined: 10 Jun 2007
Posts: 2665
Location: Preston, Lancs, UK
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| Posted: Tue Feb 26, 2008 7:11 pm Post subject: |
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I like your confidence!
Engine sycronisation is easy, its just a matter of timing them correctly!
Looking for some TBs now...
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec |
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Martijnus
Joined: 29 Dec 2006
Posts: 2019
Location: Netherlands
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| Posted: Wed Feb 27, 2008 3:20 am Post subject: |
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| Rich H wrote: | I like your confidence!
Engine sycronisation is easy, its just a matter of timing them correctly!
Looking for some TBs now... |
well, fitting GSXr1000 K2 can be done
If I may be honest I'd try to get the tb's from a 750 or something like it...those are 36-38mm diameter, I'm afraid 40 is too much (which I have..)
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)
924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment |
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