badger

As an update to this, new spring in the bov and all is well

I do yes. I did replace the actuator for a better one which didn't help. It's got a 1 bar spring. I do keep an eye on it but it's not ideal, prefer to be keeping an eye on what's Infront of me

If you have no oil pressure your warning light would be saying hello, assuming the switch is working etc. Maybe turn it over by hand and see if oil starts coming out from somewhere it should? I.e. cam feed on the back of the head or a cooler line. What makes you think it's been held back in some way?

That's makes a fuck load of sense! I hadn't considered the waste gate at all! I'll wind that in and see if it improves! Thank you That makes sense. I'll have a fuck about with the wastegate and see what happens. What arttu said about boost creep is a good point. I've had a look at the opening of the waste gate and there's fuck all material left to take out so I don't know what else I can really do to help that. Thanks again for the replies!!

Same turbo and does similar. Mine starts boost about 3500rpm, stays at about 10psi for ages but doesn't hit 1 bar until 8-9k. (14psi spring and I do get boost creep sometimes). I'm sure it used to build boost a lot quicker but I'm questioning that. To those that know, would a softer, say 6psi spring and a digital boost controller alter that characteristic letting the controller cap the limit higher, i.e 15psi etc?

I've got 16-47 on mine, mostly as that's what I had to hand. Haven't ridden it like that though. I can't remember my wheel base but roughly 4 inches over on an 1100l wheelbase

Got an in tank set up on mine. Space was at a premium!

My brother has some Chinese ones and was pretty impressed.

I'm running mine at a bar of boost and no dramas.

Well.... Fitted the new seal. Pump had proper flow and after a few mins went back to shit. The new pre pump filter arrived (after the seal) and it wasn't quite the same. Different shape and not as deep which allowed the pump to move a bit. I've used a rubber stop (that came with the pump) to take up the space. It appears to have done the job. I'm not gonna temp faite but I've hit boost and it's not shit it's pants about it. Had proper pressure again when I got home. I'm still not sure exactly what the issue is/was. I don't know if the old filter was blocking the pump? It's clear but I wonder if it was getting squished on the bottom? Either way, for now it's working. Weird though that it was giving exactly the same flow after each test. If it was blocked I would have thought it would give varying results. Everyone loves a photo. Black line is the flow I got when it was weird after 10 secs. Fuel line is what it's doing now after 5

You can swap out the pre pump filter. There is another on inside the plastic housing post pump and they're not replaceable and 350 odd quid! I have a new pre pump filter arriving tomorrow hopefully. The old one seems fine. There's no obvious blockage or restriction there. If I get a chance I'll pull it all to bits, take a bunch of pics. A few bits needed modifying to fit a bigger pump but that was done years ago without drama. I've had it apart again tonight (typed everything before but didn't get time to finish before work) and I've wired up and led to the fuel pump so if the pump loses voltage I'll see. Idea off Wayne rotty! When I took it apart there was a split in one of the o rings. Which I think happened when I last put it in as I checked it before I pushed it together. It could have been the problem but I don't think so. After rebuilding it it put out the same amount of fuel in 2 secs as it did in 10 previous. I think something is unseating after been run for a little bit. I do think there's a separate wiring issue there too.

Vents fine. Fuel flow drops of a cliff. Doesn't return until I've pulled the pump housing apart and started over. Short trip on the bike and it vanished again

The bike is literally driving me fucking insane. Taken the fuel pump housing apart a million times. (Gsxr1000 k7 in a custom tank) Rebuilt with a new pump (walbro gss342) etc and I have perfect fuel flow. Ride it for 5 mins and I have a fucking trickle again. Tried wiring straight off the battery and it's the same. I'm beyond lost with fixing it. 2 months and I can't figure out what it's doing. I've still got the internal regulator be it modified. Which could cause the problem but it seems to be doing what it should be. I can't find anything about the problem I'm having. I know I'm clutching at straws asking but any ideas would be massively appreciated! Might just roll it into a bin at this point.

Malpassi. They do one now that runs lower psi but it's identical but with a softer spring.

Haven't ridden it to check (raining again) but when I took the regulator apart, diaphragm looked fine, spring wasn't sticking or anything but when I reassembled it I've gained 1psi base pressure. I'd guess something wasn't right and now it's reseated itself? Need to stick some miles in and see if it behaves