jambojeef
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| posted on 26/9/05 at 09:43 AM |
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I got boost!
Wow!
Got the hoses from Ral des and plumbed most of it in and although there isnt a proper fuel supply yet or totally sealed plenum (!) I couldnt resist
firing her up and seeing if there was boost!!
Yippee!!
On idle you cant really detect any boost but a quick blip of the throttle and its blowing through - it seems to idle a little smoother and once the
float bowls and slides are pressurised all the air plumbing is done.
One thing that is a problem is the dump valve bounces on idle - you can see the piston moving - once the engine revs the oscialltions speed up and
eventually the piston seals and there is boost.
Anyone know what the answer is? Ive read various things saying that I might have to fit a heavier spring in the dump valve but that was randomly from
a thread in the US I think.
Will post a vid once its making all its lovely noises!
For Kissy and the others who were asking before its a garrett t25, granada turbo diesel intercooler, standard comp ratio and about 7psi electronically
controled with standalone programmable controller and solenoid valve.
Just needs a prop, brakes, lots and lots of edgind trim and an SVA!
Geoff
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Volvorsport
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| posted on 26/9/05 at 09:49 AM |
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nice one !
the dump valve should be opening on vacuum , and closing on boost - it maybe that you need a double piston type ? , so that it pulls on the second
piston at idle , otherwise a stronger spring , but it may still pull it open at idle if you have a strong enough vacuum , and since youre on carbs ?
i would say that an air leak like that is bad
www.dbsmotorsport.co.uk
getting dirty under a bus
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jambojeef
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| posted on 26/9/05 at 10:01 AM |
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Hi,
yeah, I agree it aint good - i think a stronger spring might be a plan - I did look at the twin piston types but I hadnt appreciated the benefits
until now.
How do they work then?
Geoff
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Volvorsport
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| posted on 26/9/05 at 10:34 AM |
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the twin piston type has two seperate pistons , controlled by two different rates of dpring , the lazier piston gets pulled up by the vacuum , and its
sort of a balancing act , when vacuum is less(part throttle etc) the spring.piston closes back to the original piston , whence upon boost-close
throttle , it opens normally as a dump valve . of course the noise they make is different since the second piston will stil open fractionally earlier
, so its not quite as pronounced
www.dbsmotorsport.co.uk
getting dirty under a bus
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garage19
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| posted on 26/9/05 at 11:54 AM |
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Well done.
Sorry i didn't get time to reply to your e-mail.
It looks like you are pretty much up and running anyway.
I would love to see some photos of your setup. How did you make your manifold?
You say you are running a T25? Do you have any specs for it as there is a large range of T25 bodied chargers and some are more suitable than
others.
Do you know which vehicle it came from?
You will not be dissapointed. Turbo charged bike engines are awesome and you don't have to pay Holeshot £3k to get one!
Doug.
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TimC
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| posted on 26/9/05 at 12:17 PM |
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MMmmmmm T U R B O . . .
Very nice!
Fancy making me a bolt on kit for my CBR Thou?
TC
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jambojeef
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| posted on 26/9/05 at 12:42 PM |
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Hello!
Thanks for all the encouragement! I hope it lives up to expectations....
The turbo was off a 1994 Rover Vitesse 2.0 - apparently they are all pretty similar but were also fitted to R5GTT and Nissan 200sx 13s - the turbine
housing is .48 and the compressor housing .43 if I remember correctly (hope that helps).
As for compressor trim I'll dig my calcs out tonight and post some more pics.
Its not tricky to get to the point im at now - i guess the tricky part is going to be getting it fuelled correctly througout the rev range and still
pass the emissions at SVA time.....
I made the manifold from the old bike exhaust and some 10mm mild plate for the mounting flange. Will post tonight.
Its hugely satisfying to get the enigne running and feel the boost blowing out the plenum - just hope it turns out to be driveable!!
Geoff
[Edited on 26/9/05 by jambojeef]
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garage19
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| posted on 26/9/05 at 01:51 PM |
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quote:
Originally posted by jambojeef
Hello!
Thanks for all the encouragement! I hope it lives up to expectations....
The turbo was off a 1994 Rover Vitesse 2.0 - apparently they are all pretty similar but were also fitted to R5GTT and Nissan 200sx 13s - the turbine
housing is .48 and the compressor housing .43 if I remember correctly (hope that helps).
As for compressor trim I'll dig my calcs out tonight and post some more pics.
Its not tricky to get to the point im at now - i guess the tricky part is going to be getting it fuelled correctly througout the rev range and still
pass the emissions at SVA time.....
I made the manifold from the old bike exhaust and some 10mm mild plate for the mounting flange. Will post tonight.
Its hugely satisfying to get the enigne running and feel the boost blowing out the plenum - just hope it turns out to be driveable!!
Geoff
[Edited on 26/9/05 by jambojeef]
Geoff,
The compressor wheel trim basically dictates how much air you will be able to pump at a given shaft rpm and you should match to the amount of horse
power you want to make (there are other factors, but thats another essay)!
A rough guide for the turbine wheel and housing is that it should be matched to the size of your engine.
I learnt this the hard way!
My first attempt at turboing the blade used a T25 from a nissan silvia (s12).
The exhaust housing was far too big and i only gained 15bhp as the thing was hardly spooling up!
The T25 you are after is one from a smaller engine that will have a different trim turbine wheel and smaller housing.
The best ones come from a fiat uno turbo or a renault five turbo.
The early fiat uno turbos had an IHI RHB5, another superb turbo for use on a bike.
I should think that your CBR engine is older than 95 so you shouldn't have too many probs with SVA emissions.
As for fuel pump and regulator, you need a mallapassi/FSE regulator. Burton power sell them. Its the one for turbo charged carbs and was originally
designed for the lotus esprit turbo. Then just use any fuel pump that delivers more fuel pressure than your max boost plus normal fuel pressure for
carbs eg 10 psi boost + 3 psi fuel = 13 psi. 15 psi pum to be safe. I just used a EFI one from an XR3i. 45 psi but it still managed to regulate it
down ok!
Doug.
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colibriman
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| posted on 26/9/05 at 01:54 PM |
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I'm watching closely.....well done so far!
need a bike engine? - www.colibriman.com
SVA ready Mk Indyblade possibly for sale.....if the offers good...!
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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TimC
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| posted on 26/9/05 at 02:22 PM |
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quote:
Originally posted by colibriman
I'm watching closely.....well done so far!
You sound like his old school english teacher, or his Dad! 
"Good Work Master Jambojeef"
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colibriman
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| posted on 26/9/05 at 02:35 PM |
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...hmmm less of the old thanks very much..
need a bike engine? - www.colibriman.com
SVA ready Mk Indyblade possibly for sale.....if the offers good...!
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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tadltd
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| posted on 26/9/05 at 03:32 PM |
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looks like those small turbo's I have may just be the job, eh Colin?! 
Best Regards,
Steve.
www.turnerautosport.com
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colibriman
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| posted on 26/9/05 at 04:17 PM |
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yep...need to get some numbers off them and see exactly what they are. gorgeous wee things
(but not as gorgeous as a gorgeous woman though...obviously )
need a bike engine? - www.colibriman.com
SVA ready Mk Indyblade possibly for sale.....if the offers good...!
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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PAUL FISHER
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| posted on 26/9/05 at 04:32 PM |
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great job so far,I am another one who is reading and watching this post with great interest,keep us all posted.
cheers Paul
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Volvorsport
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| posted on 26/9/05 at 09:19 PM |
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hmmm , after replying earlier , i had an astra diesel turbo to work on , its an incredibly small turbo , maybe the compressor housing could do with
being bigger .
Dont forget garret T2 turbos came on volvo 440/460/480 , that everybody forgets about in scrappies , and can be had for almost nothing , in fact i do
have one lying about somewhere - just need to find a bike engine !!!
www.dbsmotorsport.co.uk
getting dirty under a bus
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mike-ktm
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| posted on 26/9/05 at 09:29 PM |
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How hard would it be to turbo a blade motor ?
I have to remake my exhaust manifold anyway, so what else would be involved/would be needed ? Any idea of rough cost ? (was initially put off this
idea by the £3k for the holeshot kit !)
Can anyone post pics/guide of how its done/how they've done theirs pls ?
Cheers,
Mike
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kb58
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| posted on 27/9/05 at 12:41 AM |
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I'm curious what the rule of thumb is when it comes to sizing a bike turbo, one coming off a car. Seems like since the bike engine will be
spinning about 2x the rpm of the car, we could look for car engines roughly 2x in displacement of the bike engine, true? For a 1300cc Hayabusa then
we'd be on the lookout for 2.6l turbo car engine?
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
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Falkolocost
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| posted on 27/9/05 at 06:18 AM |
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Not quite as large. Will the bike engine also put out 2x the exhaust?
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garage19
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| posted on 27/9/05 at 07:28 AM |
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quote:
Originally posted by Volvorsport
hmmm , after replying earlier , i had an astra diesel turbo to work on , its an incredibly small turbo , maybe the compressor housing could do with
being bigger .
Diesel engine turbo are usually no good. The ratio between the sizes of the compressor and the turbine are all wrong.
The exhaust housings are generally too big for the given compressor.
Doug.
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garage19
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| posted on 27/9/05 at 07:35 AM |
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quote:
Originally posted by mike-ktm
How hard would it be to turbo a blade motor ?
I have to remake my exhaust manifold anyway, so what else would be involved/would be needed ? Any idea of rough cost ? (was initially put off this
idea by the £3k for the holeshot kit !)
Can anyone post pics/guide of how its done/how they've done theirs pls ?
Cheers,
Mike
Not hard at all!
See my photo archive.
My whole setup owed me £250. That includes fuel pumps, regulators and all pipe work.
I will build another one, oneday but will go fuel injected for ease of tuning.
I spent a while trying to dial the fuel out of the bottom end of my bike. I can strip some blade carbs down with my eyes closed!
In comparisson i helped a friend map his turbo charged exup the other day. Uses GSXR TBs and megasquirt. Was so easy.
FYI it made 215bhp at the wheel. Not bad for a 15 year old bike!
[Edited on 27/9/05 by garage19]
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garage19
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| posted on 27/9/05 at 07:41 AM |
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quote:
Originally posted by kb58
I'm curious what the rule of thumb is when it comes to sizing a bike turbo, one coming off a car. Seems like since the bike engine will be
spinning about 2x the rpm of the car, we could look for car engines roughly 2x in displacement of the bike engine, true? For a 1300cc Hayabusa then
we'd be on the lookout for 2.6l turbo car engine?
That's what i originally thought, but after a bit of trial and error i found it doesn't work like this.
I would say that:
Bike engine CC x 1.4 would be a better guide as to which car engines to get a turbo from.
Doug.
I would say
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jambojeef
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| posted on 27/9/05 at 07:55 AM |
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Hi all,
Meant to post some pics but couldnt find the camera! Here it is at work.....typical...
I thought that first of all a t2 would be ideal and sourced a nearly new one from an escort MkVII turbo diesel.
THe first problem I had was finding compressor maps and this was always a problem as I tried to work out if it was suitable.
Looking at similar IHI and Garrett turbos I came to the conclusion that the A/R ratio was way too small for the CBR1000 on both sides of the
compressor wheel.
Calcs on the t25 seem to suggest that it will run at around 70% efficiency with the CBR1000 which would be really excellent.
I do think that upping the boost at a later stage will increase the overall efficiency of the setup but thats for a later date...
WIll post pics tonight
Geoff
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garage19
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| posted on 27/9/05 at 01:54 PM |
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Geoff,
The maps you have been looking at are for the compressor wheels and housings.
They do not relate to the turbine.
If you really want to use that turbo i would see if you could get a smaller housing and different trim turbine off a R5 or something and build a
hybrid.
Doug.
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Volvorsport
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| posted on 27/9/05 at 07:08 PM |
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this turbo i was looking at was smaller than a T2 im sure , the exhaust housing was tiny , smaller than a T2 .
theyve only got oil cooling also , making it simpler - the compressor was a .36 trim , so really small .
www.dbsmotorsport.co.uk
getting dirty under a bus
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mike-ktm
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| posted on 27/9/05 at 07:29 PM |
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What are ppl's thoughts on using a mini metro turbo ? Would this be any good for charging a blade engine ?
Mike
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