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You gotta love the internet...
I hate to be a downer but I wouldn't have a turbo bike with carbs as an every day bike.Quote:
quote:pav69 Posted - 09 Apr 2011 : 07:41:21
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ok ben i have considered this aiso for my zxr750 but dont know where to start and you being the kwacka guru you are having done a few now sorry lost count on how many ,what size turbo is good to start with also running carbs i only want about 150-180 hp this is an everyday bike so i dont want big boost just a mild set up.
T25 size turbo is a good start for a mild setup, personally I prefer the GT series roller bearing Garrets though like a GT2554.
how much mucking about to convert to efi custom inlet computer etc ballpark figure with you doing the fabrication work
hey pav im with ben on the t25 thing , i use to have a et pulsar turbo and the t25 was a standard item , factory set at 7psi was fine but i intercooled it and ran 10psi and as high as 13psi but after destroying the turbo research found the turbo just couldnt handle the boost , the roller bearing gt series are much better stronger , longer life and have been told that they spool up earlier too
speak to rocket about turbo and carb setups i know him and rockhard got it sorted in the end but i remember him saying it was a head f$ck
have you thought about a draw through turbo system like the old mr turbo kits , single carb before turbo no intercooler still with low boost and a standard internals should make good power
As said some big claims and mods that don't seem to work together but this is the internet and anything goes :D:D:DQuote:
quote:Originally posted by EXBEN
This guy is full of shit.Quote:
quote:And a quick note on what was done,
quote El hunga "Ye thats my baby & yes its a pain in the butt.
I get 300 BHP at the wheel at 25 psi boost.
Only problem it cant be ridden for long as the front wheel is in the air most of the time.
I would like to tell you that I have spent lots of money changing the internals but I would be lying to you if I did.
The truth is the engine internals are pretty standard from Factory.
The original crank & rods are designed to handle high RPM so I choose to take into consideration & use it into my advantage.
What I did was install a 4mm decompression plate to reduce the compression.The only thing was that when I did that the new chains were to short so I had to put spacers between the tensioner to allow the tensioner to work efficiently.
The cams have been changed from originals, the standard ones work from 9000 rpm to 12000 rpm where max power is.
Now my power output is between 6700 to 9000 rpm thus making the power almost instant when the revs come up thus making the bike slightly difficult to ride around corners unlike original.
Original you can be on 2 gear doing 7000 to 8000 rpm around the corners with no problem when you increase the revs, my beast is on boost so when you turn the corners at that rpm you will be in the air or the rear wheel spinning to trying to beat the front.
I wanted to prove that to turbo a ZXR 750 was possible but also get good power from it as well.
Most people talk about injection which is easier but I wanted to do the standard carbs to show you can do it also, injection would be easier but that to me is cheating.
Anyone can do injection but carbs are very difficult.
Currently on 25 psi boost it stands up on the rear wheel at 300 klms easy. Very scary when its a street fighter.
The only problem I have is when you are on boost you cannot just release the throttle as it would flood the engine from the amount of fuel that has rushed in.I do have ignition advancers also as well as very large ports in the cylinder head. They have been increase by a further 35% to allow for the extra power increase also the gearbox has been blue printed to handle the power.The engine can handle it no problem you just have to decrease the power band thats all."
So he's making 300 at the wheel on 25psi boost on what looks like a T25 turbo that would struggle to make 250hp, he's got no intercooler so his intake charge would be absurdly hot,he's running ignition ADVANCERS?? with that much boost you would want to retard the ignition not advance it, it stands up on the rear wheel at 300km/h call me cynical but I think not, & can someone explain to me how Blueprinting a gearbox increases it's strength??
I was thinking the same with blueprinting the box but again this is the internet and maybe things work differently O/S [:p][:p][:p]
Anyway back to the research
So a weekend in the shed and we have this,
http://pic70.picturetrail.com/VOL183.../396511778.jpg
http://pic70.picturetrail.com/VOL183.../396511775.jpg
http://pic70.picturetrail.com/VOL183.../396511781.jpg
And
http://pic70.picturetrail.com/VOL183.../396511919.jpg
http://pic70.picturetrail.com/VOL183.../396511927.jpg
My first attempts.
All coming along :D[8D] exhaust is almost done and the intake side is taking shape
This will be done on a tight budget so as always it maybe a little slow :(
Hey mate, nice zx7 project, i was going to turbo my zx7 also but i ended up deciding to start another project, i have an adjustable CDI if you are looking for one for the zx7, its a vance & hines and has ignition timing for turbo charged motor option, even cams and RPM limits.
http://www.psychobike.com/forums/tur...er-mods-2.html
you may find this interesting
Just put a 9 in it. Less fucking around for same ish result.
Thansk,Quote:
quote:Originally posted by Achtung
Hey mate, nice zx7 project, i was going to turbo my zx7 also but i ended up deciding to start another project, i have an adjustable CDI if you are looking for one for the zx7, its a vance & hines and has ignition timing for turbo charged motor option, even cams and RPM limits.
How much do you want for the CDI, everything it on a budget :( but I need to sort ignition timimg.
I can't seem to find much info on them are they boost ref, programable or pick one of a set number of advance curves
Sweet thanks[8D]Quote:
quote:Originally posted by Booster
http://www.psychobike.com/forums/tur...er-mods-2.html
you may find this interesting
So its coming alone waiting on parts but some did show up[8D]
http://pic70.picturetrail.com/VOL183.../396970147.jpg
Damper fitted
http://pic70.picturetrail.com/VOL183.../396970089.jpg
Almost ready to start it up with the turbo installed just gotta wait for some last bits to arraive and make up an oil feed hose so maybe next weekend [8D][8D] then I just gotta tune it [8)]
wheres those levers and pics of plenum
Soon mate just waiting on the blooy postie for the rest of the stuff
http://pic70.picturetrail.com/VOL183.../397077540.jpg
fuel reg and pump in place.
http://pic70.picturetrail.com/VOL183.../397077541.jpg
first attempt will see how this works
should get it started tomorrow I hope still waiting on some gauges to arrive but can get it started with out wont hurt :D
Also picked up a second ignition rotor to play with and see if I can get it how I would like
http://i1234.photobucket.com/albums/...4062011561.jpg
CDI in place
http://i1234.photobucket.com/albums/...4062011565.jpg
http://i1234.photobucket.com/albums/...4062011562.jpg
http://i1234.photobucket.com/albums/...4062011564.jpg
http://i1234.photobucket.com/albums/...4062011567.jpg
http://i1234.photobucket.com/albums/...4062011563.jpg
Oil feed and return lines done scavenger pump fitted had to make up the fittings on the turbo for both oil and water. Exhaust done back to the muffler again. Fuel pump and scavenge pump wired up with a relay using the original fuel pump wires for the signal.
http://i1234.photobucket.com/albums/...4062011566.jpg
Working on the hose / pipe work for the intake. I was hoping to post up a start up vid tonight but due to some general fuck ups I have to have a little rethink on a couple of pieces so it will delay start up a little not sure how long yet cause I don't know how to solve the problem yet but I am working on it.
Getting there :)
those oil pumps don't move a real lot of oil, you may need to see how much oil comes through the turbo and check the pump can keep up .
I was thinking the same. It tells me it will move 1.8 litres a minute but figured it would be a suck it and see on if it was enough. I have restricted the inlet side of the oil feed down to a 3mm hole not sure on the oil flow required again will have to keep an eye on it