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Underbody braces, turbos and more!

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 Post subject: new pics!!!!!
PostPosted: Mon Oct 16, 2006 12:02 pm 
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Joined: Fri Mar 19, 2004 5:00 pm
Posts: 268
Location: a liitle village called Gilberdyke
here are some pics of my car with its finished engine set up...... so far anyway!! hehe. i made the box from fiberglass which took roughly 3 days from start to finish. llet me know what you guys think.

cheers tempo

http://pg.photos.yahoo.com/ph/tempo7000/my_photos


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 Post subject:
PostPosted: Tue Oct 17, 2006 6:38 am 
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Joined: Tue Feb 17, 2004 5:39 am
Posts: 205
Location: Melbourne
I like the japanese imperial rising sun motif :twisted: Id paint the plenum black just to avoid getting hassled by the cops if this ride is on the road.
Very nice setup looks almost factory! well done. :shock: :P

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 Post subject:
PostPosted: Tue Oct 17, 2006 10:54 am 
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Joined: Tue Nov 19, 2002 9:58 am
Posts: 8146
Location: Seattle, WA
why not just 4 filterpods and a subaru style hoodscoop ?
nicely crafted, but you're going to have some uneven air distribution and you're reducing all those gains you get from having a quad tb/carb setup, not to mention muffling that wonderful intake noise.

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 Post subject:
PostPosted: Tue Oct 17, 2006 11:19 am 
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Joined: Fri Nov 28, 2003 4:21 pm
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Location: Durham, UK
Hi Temp,

It looks good but I think it is on a small side.
You should made as big as you could fit to create even air flow to all the carbs.
Also, if you could made deep as well.... so that you can fit trumpets.

Good work and let us know how you get on with roller!

Cheers
Atchi


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 Post subject:
PostPosted: Tue Oct 17, 2006 11:23 am 
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Joined: Fri Mar 19, 2004 5:00 pm
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Location: a liitle village called Gilberdyke
the airbox is 3litres exactly. im sure it will be fine. how come you say it will have uneven airflow???

tempo


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 Post subject:
PostPosted: Tue Oct 17, 2006 12:32 pm 
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Joined: Fri Mar 19, 2004 5:00 pm
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Location: a liitle village called Gilberdyke
hey guys i jus got back in an i have problems with it. it seems like the cars choking/not getting enough air. i took airbox off and all seems fine. i have no queries on the size but as you gus say bout the uneven airflow, how do i stop this??

cheers tempo


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 Post subject:
PostPosted: Tue Oct 17, 2006 1:59 pm 
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Joined: Fri Nov 28, 2003 4:21 pm
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Location: Durham, UK
Hi,

When I was thinking of making airbox, I have been told to make as big as possible or at least same volume as an original bike airbox.
I even bought original R1 airbox from ebay.
It is really big volume and I think it will be more like 8 litres.
My Lotus airbox is even bigger than original air box for the bike.
I hope this answeres your question.

Cheers
Atchi


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 Post subject:
PostPosted: Tue Oct 17, 2006 4:09 pm 
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Joined: Fri Mar 19, 2004 5:00 pm
Posts: 268
Location: a liitle village called Gilberdyke
i got told that it should be at least 1.7 times the size of the engine. 8 litres seems massive i was looking at bolivars set up and i have jus taken the airbox off and fed the filtered air over the top of the carbs. going to leave the airbox off. probably making the carbs into throttle bodies and going for a turbo set up. hehe. im wonting more power already.

cheers tho

tempo


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 Post subject:
PostPosted: Wed Oct 18, 2006 6:34 am 
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Joined: Tue Jul 15, 2003 3:48 am
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Location: Brisbane, Australia
spt-3x1.0 wrote:
I agree with N1TRO that you should make a set up to allow for trumpet filters & foam type hood seal against the bottom side of a wide WRX style hood scoop to allow for even airfow.

By the way I like the end results of the time & patience it took to do your valve cover & timimg belt cover


Whilst an easy way out its not optimal . Airbox will provide undisturbed air from which the engine will suck. The larger the intake volume the less critical the airflow into it.
I have been told to optimise the intake so there is at least 1 inch of seperation from each side of the trumpet, especially underneath the trumpet head.
Socks over the trumpets have a tendency to disturb the airflow around the trumpets. Hance they were given the boot in favour of one large panel filter.

Anyway, the airbox that was made looks very nice. Wish I had the skills to make something like that in 3 days. (or the time) :)


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 Post subject:
PostPosted: Thu Oct 19, 2006 3:49 pm 
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Location: Noord Braband
Yep sticking the trumpets in the airbox is common practice
The air box can be bigger. It looks to me that turbulence plays a role here as well.

This one is not so big as well.

Image

I don’t remember the type of bike but what they did is make an extra holes in the air box to get more in. It took some time before they noticed that cylinder one and four were getting a HI AFR and 2 an 3 were fine.
What you think is not always what you get if it comes to air.
What we did is connect the pressure meter up to the carbs and run the car on the dyno and look for differences.
To get the most out of the engine we even played by moving the trumpets back and forth in the air box until we had max performance.
We even played about with tapeing off the air box intake when the engine with carbs did not want to run @ hi RPM. And it worked as well this Old school stuff.:wink:

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 Post subject:
PostPosted: Thu Oct 19, 2006 4:05 pm 
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n1tr0 wrote:
why not just 4 filterpods and a subaru style hoodscoop ?

Cause then he might abandon all hope and sell it before it's done :lol: I don't recall who might have done that!! :razz:

Anyways, looks good man! Nice job on the airbox.

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