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My second T4, operation de-chav
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Originally posted by regcheeseman View PostUnfortunately the smoke is all but gone, still got the white on start up.
Originally posted by regcheeseman View PostI want to see what the N75 is having to do to overcome the extra pressure closing the wastegate.
Has it dropped into limp mode yet, if so, at what point?
Originally posted by regcheeseman View PostThen fit the decent injectors.
Sent from my SM-G901F using Just T4s
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Originally posted by Activ8 View PostWhen can you do a run?
Has it dropped into limp mode yet, if so, at what point?
I will try and do a run.
It has dropped into limp twice - both only noticed when I've been cruising on a light throttle for a while, then hit an incline and realised there was nothing there, I dont know if its limping as I back off prior to cruising for a while or going into limp whilst running on a very light throttle.
Need to try and capture this.
Clear codes first because I'll still have the under boost deviation faults - I dont think its still that.
Do you have wastegate actuator on the bench? Where's the spring sited and how is it pre-loaded?
Driveshafts and bits turned up today
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Originally posted by Activ8 View PostAny idea where that intermediate drive shaft mount/bearing will be mounted?
Missed the opportunity to pick one up for £80 a few months ago - not found anything for sensible money since.
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LibreCad seemed fine - then started crashing when I tried to zoom or pan, stepped back a few versions and it seems to work.
Lete me have any sketches of parts you'd like and I can bundle them in one job and get a sensible price. Did you want a five pot flange?
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Originally posted by regcheeseman View PostIt is - on shape didn't like my aged laptop, autocad don't publish an old enough version to suit either
LibreCad seemed fine - then started crashing when I tried to zoom or pan, stepped back a few versions and it seems to work.
Lete me have any sketches of parts you'd like and I can bundle them in one job and get a sensible price. Did you want a five pot flange?
Sent from my SM-G901F using Just T4s
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Originally posted by Activ8 View PostJust downloaded LibreCAD for Ubuntu software. Will take a look at the learning curve to draw anything meaningful. Yes if possible I would like 3x 5 pot flanges for a single and twin turbo self build. What thickness are you making these flanges from?
Originally posted by Activ8 View PostWhen do you want the sketches / drawings by? What else are you planning to have made? Inlet / Exhaust / Gearbox / ????
Gearbox bits will be separate jobs - there's the initial adaptor plate and flywheel spacer. then it'll need mounting brackets for outrigger bearing and gearbox top and pendulum mounts plus whatever I do with the driveshafts.
It is unlikely that the driveshafts will be a matched pair - because the gearbox will be spaced at least 10 - 12mm off the engine by the adaptor plate, even the nearside driveshaft will have to be shortened, unless there's some real good fortune in the new gearbox geometry or there is a suitable shaft available off the shelf.
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Here's the Volvo wastegate valve and housing pics. Diaphragm and spring are inbetween the vacuum top and pressure side port. Spring resistance is between 10-11psi. Wastegate is sealed by the valve spring and is compressed by about 5mm when fitted. Pressure from the manifold is directed up to the valve face pushing the valve open.
Sent from my SM-G901F using Just T4sLast edited by Activ8; 17 April 2018, 04:44 PM.
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Originally posted by Activ8 View PostPressure from the manifold is directed up to the valve face pushing the valve open.
You had a spare wastegate that you had hacked into? Or Colin did? Dremel off that vee band?
Had a thought last night - moment of clarity - when you were talking about using an MBC, you meant to have it paralleled with the N75 to create an additional control signal. I was thinking you were trying to use it to modify the boost pressure I'm using to hold the wastegate shut - hence why I couldn't see how it would work.
I need to get a fixed preload on my wastegate because at the moment the turbo cannot make boost properly with a wastegate slightly open, it cannot close that wastegate until it starts to make boost = catch 22.
Meanwhile.....wheels are being collected by courier today and there's a dyno day next Saturday (28th) at a mates garage - planning to go and get some figures.
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