Project; Turbo GSXR Slingshot

Should be for the price....

Finished welding so its all ready for the final bolt up.

Picked up some mineral oil today but can't find the oil filter I bought, if I actually bought one, so I'll pick one up during the week along with some antifreeze too.

Then its only a bit of spannering away from the go button again.
 
Thanks, hopefully I've found all the issues but I've still got some ecu settings to double check.

Headers and wastegate are bolted up, had new filter, fresh oil and I've spun it over to get some oil in the galleries and cooler.

Got to go back to work now so rad etc tomorrow
 
Its alive!!!

Primed the fuel lines and it started 2nd push of the button, idled nicely with a steady .85 lambda, revs cleanly and coolant temps peaked at 70c after ~5mins.
Started straight away from hot too which is nice.

Few bits to tidy up then its dyno day.
 
I think I could ride it now with the tune its got but it requires a fair amount of auto correction in places so although its tempting I think I'll wait for a day on the dyno to fine tune it first.
 
Work has been full on the last few weeks which is great but it means there's not much time for bikes.

Have managed the odd hour here and there though and gave it a quick run down the road to check clutch etc before booking some dyno time.

Doesn't hold a steady rpm and isn't a nice ride yet but it rode.

Got a weird noise when I turn it off though, only suggestions off OSS have been the turbo slowing down or its possessed!

 
Thanks, been a long journey!

Fits in the van easily.
Also cleared up a few ecu questions with Specialist Components so all set for tomorrow.

Hopefully make a bit of progress.
 
Well it stayed in one piece, mainly...

Lost a couple of header bolts during the afternoon and all the cam cover bolts loosened resulting in more oil over Dans dyno!

Its mapped from 20% to 100% throttle and runs nice, runs better a little leaner than normal turbo bikes and it may need leaning out a bit more yet.

Weirdly it makes the same power at 70-80% throttle as it does at 100% but it requires more fuel, not sure how thats working but its something to look into.

Ended the afternoon trying to get a smoother idle and stop the jerking at low throttle openings.

Sadly no end of day vid as Dan had to shoot while I put the bike back together.

So a good check over is needed and its safe enough to get some road miles on it before the next dyno session to iron out the low rpm running and see what kind of power it can make.
 
Checked the engine over and found an issue that could have been costly.

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Missing cam sprocket bolt. The other has loosened so the sprocket moves on the cam as well. The intake is fine, both had loctite and were torqued to the specs in the manual.

Found the missing bolt though when I couldn't turn the engine over by hand and looked down the cam chain tunnel.

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Hate to think of the damage it would have caused if I'd tried to start it.

Bolt looks a little beaten up so I guess it was running for a short time with the bolt floating about.

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So I now need to find a way of holding the sprockets in place and making sure these bolts don't come loose again.

The valve clearances seem a little tighter than they were so I don't think any piston to valve contact has taken place.
 
Its definitely the right bolt as they're M7, got a bag with cam sprockets and bolts in, they don't fit anywhere else.

Just cocked it up I think, not done up tight enough and maybe I should use stronger loctite.
 
Got a free degree wheel off a friend so made an adaptor to hold it using a couple of trigger wheels, bit chunky but its all free stuff and much better than the card one I used last time.

Just need to pin the trigger wheels.

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Checked valve clearances as well and got a couple of shims ordered.
 
Bit busy but got the cams in and valve clearances checked and the cams dialed in.

Plenty of loctite 270 on the sprocket bolts this time!

Put everythin else back on and its running again.
Will book some dyno time tomorrow.
 
So not got round to booking the dyno, lack of spare cash is the problem!


I have done about 20 miles on it over a couple runs out, revs hang at about 3k rpm so pulled the data off the logger and it was running lean, upped the fuel in that area and tried again and it still does it but a little higher rpm.

Got back and plugged the laptop in and its reading about 8.5 lambda when its hanging now.


Still does the same running closed loop with corrections so I'm guessing it must be butterfly or air bypass related.


Coolant temps are good though, actually have to wait for it to warm up now rather than needing to get moving quick to keep it cool so I'm happy with that.


The swing arm is currently the catch can for the breather and there was a fair bit of oil in it, the clutch cover breather doesn't have a lot of height on it now so I put a baffle over the opening to see it it helps.

Only a couple of spots came out after my runs out so I'll see how it fairs on the dyno.


Don't think there's much I can do now without an expert and a dyno so it's back waiting again.
 
Taken its time but its getting there, its all work at the minute but I'm hoping for an easy week soon.

Just impulse bought a gas gas trials bike though. Been keeping an eye out for a year or so and this came up, same town as me and the right price but its killed some spare cash for the dyno!
 
Today was dyno day!

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Good few hours really with good progress.
Nothing really fell off and its running much better.
Dan sorted its hanging at 3k rpm on closed throttle with some throttle adjustments and fuel map changes and it sounds better on idle for it too.

Peak power was 194bhp which is about the same as last time but its a much smoother delivery now and its jerking and spluttering has stopped.
Seems a little low but there's injection and ignition timing to play with so that will probably come up with more dyno time.

The cush hub has started touching the swing arm though so I need to look into that and see whats going on, it was close before so something has moved.

Got a vid to upload but its very muffled with wind noise.
 
Yesterday was a massive step forward in getting it rideable, the cush hub breaking is just another one of those issues that come with a build like this.

The run in the vid scared the life out of me, didn't realise the quickshifter was so violent!
 
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