Blowthrough carbs for turbo?

[Seraph]

So I have quite an interesting little build on the go, an xv1000 In a custom frame.. just for a little more pep im throwing a turbo on the side. Anyone know of any decent carbs for blowthrough that do well under pressure (say 1 bar) with the correct fueling setup ofcorse.

[pete376403]

Sidedraft webers.I did this on a pretty old 40DCOE. Replace the butterfly spindle ball bearings with sealed ones, make sure the float chamber sees boost pressure (float bowl is vented to air box) and replace the brass weber floats with plastic dellorto ones. That was about all it needed aside from jetting.
The brass floats would collapse under pressure and sink, the dellorto one were fine.

Webers look quite cool hanging out the side of a V engine

[Seraph]

Sidedraft webers.I did this on a pretty old 40DCOE. Replace the butterfly spindle ball bearings with sealed ones, make sure the float chamber sees boost pressure (float bowl is vented to air box) and replace the brass weber floats with plastic dellorto ones. That was about all it needed aside from jetting.
The brass floats would collapse under pressure and sink, the dellorto one were fine.

Webers look quite cool hanging out the side of a V engine


I Was more hoping for something a little more subtle.. trying to avoid adding much width

[jonbuoy]

Worth having a look into SU carbs - loads of information on getting them to seal on boost they look good polished up too.

[F5 Dave]

I would strongly resist tormenting one of those any more than required. They, despite being SR500 technology, weren’t Yamahas best engine. If it goes count yourself lucky but don’t push your luck.

[husaberg]

Blah blah 10 carrots
half the links will likely not work but shit happens.
STD CV carbs are pretty easy to mod.
the link that shows how no longer works but if I can be arsed later I probably saved the text.
If you google blow through cv carb turbo and pitot tube you should find how it works.
The rising rate regulator stuff is all about the net but read the turbo GEM site.
the is a plenty of books on the net on the subject.

fuel pressure reg

http://www.cbperformance.com/catalog.asp?ProductID=581
http://www.injectacarb.com.au/fuel-pressure-regulator-malpassi-rising-rate-p-91.html?osCsid=7f20a539b789
http://www.turbogemini.com/Blow%20Through%20FPR.htm

cv carb mods
http://www.turbo-bike.net/Pressurize%20carbs.htm
http://www.streettuned.com.au/index.php?_a=viewProd&productId=1494
http://unclebobsturbos.com/newbie.html

building a small efi
http://feralinjection.com/cbr/cbr2.html
http://www.megasquirt.info/
http://www.dune-buggy.com/turbo/fuelsystem.htm

Water injection
http://www.rbracing-rsr.com/waterinjection.html
http://autospeed.com/cms/title_Water-Injection/A_107970/article.html

The fang
http://www.thefang.co.uk/news2008.htm

Elsberg tuning home of the supercharged 50 and lots of intersting stuff.
http://www.elsberg-tuning.dk/supercharging.html
http://www.elsberg-tuning.dk/the%20bikes.html#Building a supercharged Honda engine

Intercoolers
http://autospeed.com/cms/A_1931/article.html

Small turbo
http://forums.evolutionm.net/other-cars/265923-i-can-turbocharge-anything-6.html
http://www.vespalabs.org/User:Internetscooter/Scooters/Dry_Lake_Racer/2011_Upgrades/IHI_RB31_Turbo_Charger


All sorts of technical stuff
http://victorylibrary.com/supercharger/super-c.htm
http://autospeed.com/cms/title_Supercharger-Steal-Part-One/A_110294/article.html

udder stuff
http://autospeed.com/cms/title_The-Nitrous-Fuel-Controller-Thats-Also-a-Lot-More/A_2546/article.html
http://www.dune-buggy.com/turbo/turbo_fi_basics.htm
http://not2fast.com/turbo/glossary/turbo_calc.shtml
http://www.trademe.co.nz/a.aspx?id=492361027

http://i194.photobucket.com/albums/z314/achidotcom/DSC02190.jpghttp://i194.photobucket.com/albums/z314/achidotcom/DSC02188.jpghttp://scootercommunity.com.au/forums/storage/5/127294/turboweb.jpg

[sidecar bob]

I did a very sucessful blow through turbo installation on a BMW R100RS using the standard Bing CV carbs with a few mods, the most important being routing the bowl vents to the pressure chamber, or plemum. It still needed jetting up & a few other minor mods.

[Seraph]

I would strongly resist tormenting one of those any more than required. They, despite being SR500 technology, weren’t Yamahas best engine. If it goes count yourself lucky but don’t push your luck.



Its just a toy =} if it pops it can get ls rods and porsche pistons for christmas... its getting intercooled, water meth injection and an ignitech tci and wideband lambda so shoulnt be a major to put a bar into it..

[jonbuoy]

Its just a toy =} if it pops it can get ls rods and porsche pistons for christmas... its getting intercooled, water meth injection and an ignitech tci and wideband lambda so shoulnt be a major to put a bar into it..

Why don´t you Microsquirt it? Your fitting all the sensors for ignition - it won´t be that much more work.

[ducatilover]

Why don´t you Microsquirt it? Your fitting all the sensors for ignition - it won´t be that much more work.

Not too dear either. Nice wee systems them.

You can blow through on CV carbs easy enough, Mikunis by general rule of thumb have a wee bit more fine adjustment because air jets are removable usually, but it's not that important on a turbo tractor. Fitting 8mm needle/seats to anything with a smaller 6/7mm one would be a good thing to do.
The rest is in the links provided (I hope)
If you sort the pilot tube sizes right you won't have to do any crazy jetting

Being a crap Vtwin it may be a bit underwhelming and not spool very well

[Seraph]

Not too dear either. Nice wee systems them.

You can blow through on CV carbs easy enough, Mikunis by general rule of thumb have a wee bit more fine adjustment because air jets are removable usually, but it's not that important on a turbo tractor. Fitting 8mm needle/seats to anything with a smaller 6/7mm one would be a good thing to do.
The rest is in the links provided (I hope)
If you sort the pilot tube sizes right you won't have to do any crazy jetting

Being a crap Vtwin it may be a bit underwhelming and not spool very well


Its a pretty small turbo... nearly finished the manifold, its pretty close to equal length and good merge collector..no reason why it shouldnt spool around 3...ish

[pete376403]

Have you used the appropriate compressor map to confirm it is correct size? Matching a turbo to an engine is more that "looks about right"

[Seraph]

Have you used the appropriate compressor map to confirm it is correct size? Matching a turbo to an engine is more that "looks about right"


I skimmed over them, cross referenced the averagr cc ratings for vehicles they are used on vs the boost I wanna run... ended up going for the smaller gt15

[ducatilover]

Well, a GT15 will come on boost on anything :lol: so she'll spool a bit. .33 A/R or something?

[jonbuoy]

Not too dear either. Nice wee systems them.

You can blow through on CV carbs easy enough, Mikunis by general rule of thumb have a wee bit more fine adjustment because air jets are removable usually, but it's not that important on a turbo tractor. Fitting 8mm needle/seats to anything with a smaller 6/7mm one would be a good thing to do.
The rest is in the links provided (I hope)
If you sort the pilot tube sizes right you won't have to do any crazy jetting

Being a crap Vtwin it may be a bit underwhelming and not spool very well

They are - really small as well. They don´t have all the features of Megasquirt but for most applications they are more than enough.

[Zzr600 Turbo]

Hey
Reading this... I’ve just done a blow thru that’s fully adjustable (fuel AFR) when riding.. saves a shit load of time pissing around with jets.
Also have automated it to self adjust about 2 times a second all for bugger all $$
If anyone interested feel free to ask.

[husaberg]

Hey
Reading this... I’ve just done a blow thru that’s fully adjustable (fuel AFR) when riding.. saves a shit load of time pissing around with jets.
Also have automated it to self adjust about 2 times a second all for bugger all $$
If anyone interested feel free to ask.

asked.......... fuel injection

[Zzr600 Turbo]

Fuel injection would be nice but this is a early 90’s poverty pack.
I guess nobody can be shagged now days to turbo a carb bike....

[husaberg]

Fuel injection would be nice but this is a early 90’s poverty pack.
I guess nobody can be shagged now days to turbo a carb bike....

Are you going to spill?
a servo stepper motor operating a carb needle driven off a 02 sensor and a light bar scale?

[Zzr600 Turbo]

Bloody close. Super pitot. Cheep ass modified boy racer boost control to bleed excessive pressure. Driven off o2 sensor . Was bang bang but at the moment working on PID.Arduino and data logger..
Ultra effective and cheep as chips. Just dial up fuel afr req . Did some landspeed trials with it in manual and worked sweet as.. Auto has made the thing angry as... taken away the shitty big fuel up as boost building

[husaberg]

Bloody close. Super pitot. Cheep ass modified boy racer boost control to bleed excessive pressure. Driven off o2 sensor . Was bang bang but at the moment working on PID.Arduino and data logger..
Ultra effective and cheep as chips. Just dial up fuel afr req . Did some landspeed trials with it in manual and worked sweet as.. Auto has made the thing angry as... taken away the shitty big fuel up as boost building

So whats the set up post some pics i assume its a IHI RHB31.

[Zzr600 Turbo]

K03 ... off a Peugeot.
Fuel is large percentage of paint thinner
Water injection
Ha ha... what can go wrong!

[husaberg]

K03 ... off a Peugeot.
Fuel is large percentage of paint thinner
Water injection
Ha ha... what can go wrong!

I am not familar with a K3 whats the sizes..

[Zzr600 Turbo]

It was nothing scientific.. just sized to suit my wallet at $150

[Zzr600 Turbo]

https://m.youtube.com/watch?v=QSzIxs2uAfA

[husaberg]

Great suff i would love to see some pics of the set up i are assuming you used one of the needle jet air bleeds for the adjustable pitot that quite spectacular who came up with that as its a stroke of bush rigging genius.
i was thinking maybe you had a steeper motor on a SU needle from your description.

[Zzr600 Turbo]

Got bugger all photos of build. Was a big rush to have running for test day.
I’ll snap some shots
I’d say it was the first time this little champ had been pushed off the clock.. ha ha