Search Results
Post Author Forum Replies Views Posted [asc]
    Thread: How to adjust VNT stop screw ?
Post: RE: How to adjust VNT stop screw ?

vnt boost is set up in mapping, not by the screw stop! If you can't achieve the boost curve the mapping wants, because it can't close enough - then you start to look at the mechanical side of things (...
Chairchild XUD Section 15 6,087 28-09-2015, 08:24 PM
    Thread: turbo adapter
Post: RE: turbo adapter

it'll kill you... over a very very very VERY long time (the tiny soot particles can build up in your lungs - over a period of decades) Either get a machine shop to flatten the adaptor, or use a buttl...
Chairchild XUD Section 3 851 30-08-2015, 12:37 PM
    Thread: Taking apart ve pump
Post: RE: Taking apart ve pump

if you're planning on storing it for a while, put it in engine oil. I too have had two tubs of parts stored in diesel, only to come back a year later, and find them covered in thick gunge, and a layer...
Chairchild XUD Section 13 1,608 11-07-2015, 06:03 AM
    Thread: Xud to hdi clutch. Flywheel question.
Post: RE: Xud to hdi clutch. Flywheel question.

HDi flywheel is something like 38-2 toothed setup, XUD is just a simple 4 tooth affair If using an angle grinder to remove the teeth - be sure that you don't get the flywheel hot, just "tickle" the ...
Chairchild XUD Section 5 844 11-06-2015, 09:38 PM
    Thread: VSR turbo balancing
Post: RE: VSR turbo balancing

I've had a turbo sat on my bench I'm *dying* to fit, for over 6 months.... but it needs a rebuild. So on the bench it stays. If it needs a rebuild, it's a pro job. Rebuilding turbos is simply not so...
Chairchild XUD Section 34 5,627 03-05-2015, 09:43 PM
    Thread: VSR turbo balancing
Post: RE: VSR turbo balancing

I give it 500-1000 miles before it's shagged ;) Although, I've seen home-built turbos die after half an hour of running too. Makes quite a mess on the dyno
Chairchild XUD Section 34 5,627 03-05-2015, 08:58 PM
    Thread: bosch VE land rover 300tdi
Post: RE: bosch VE land rover 300tdi

boost leak - possibly something coming loose at high airflow/pressure
Chairchild XUD Section 9 1,487 19-04-2015, 06:12 PM
    Thread: VSR turbo balancing
Post: RE: VSR turbo balancing

think of it this way... if you built a house, then asked a builder to put his name against it, without even looking inside, do you think he'd say ok, or would he just laugh at you? Most of the issues...
Chairchild XUD Section 34 5,627 19-04-2015, 09:22 AM
    Thread: VSR turbo balancing
Post: RE: VSR turbo balancing

no turbo company will balance a turbo, not built by themselves. Anywhere. And if you DO find somewhere that does, avoid them at all costs, as they clearly dont give a rats ass about supplying someth...
Chairchild XUD Section 34 5,627 16-04-2015, 07:01 PM
    Thread: XUD Compound turbo project.
Post: RE: XUD Compound turbo project.

Dissertation subject for my BEng degree in Automotive Engineering :) I was supposed to have a budget of £50, but the engine rig itself ran to over £1k in costs, lol. Machining time for the rest of the...
Chairchild XUD Section 21 6,662 07-03-2015, 11:32 PM
    Thread: XUD Compound turbo project.
Post: RE: XUD Compound turbo project.

(07-03-2015, 07:44 AM)Dum-Dum Wrote: The only thing I would want would be either a better knowledge of the travel of different boost cans at different pressures or to be able to adjust the length of...
Chairchild XUD Section 21 6,662 07-03-2015, 11:56 AM
    Thread: XUD Compound turbo project.
Post: RE: XUD Compound turbo project.

mechanical vnt control is pants at best, and an exhaust brake at worst. Did my dissertation on the subject - one setup gave so much resistance, we couldn't start the engine! lol
Chairchild XUD Section 21 6,662 06-03-2015, 11:31 PM
    Thread: Cheap Chinese Pump Heads , any good?
Post: RE: Cheap Chinese Pump Heads , any good?

turbos are a different kettle of fish - a chinese turbo may well be balanced as good as any (it's only a balancing machine, which can be bought by anyone) but the tolerances can mean you won't get *as...
Chairchild XUD Section 16 2,864 21-02-2015, 10:12 PM
    Thread: Cheap Chinese Pump Heads , any good?
Post: RE: Cheap Chinese Pump Heads , any good?

you've convinced yourself it'll be fine - so why are you still asking? PS: when it breaks, the whole pump will need disassembly to remove all the shards of hardened steel, along with flushing the inj...
Chairchild XUD Section 16 2,864 20-02-2015, 01:28 PM
    Thread: Cheap Chinese Pump Heads , any good?
Post: RE: Cheap Chinese Pump Heads , any good?

I know someone who tried a chinese head on his Rover - literally didn't even get the chance to get it in to gear, before it sheared the piston in two...
Chairchild XUD Section 16 2,864 19-02-2015, 09:43 PM
    Thread: Cheap Chinese Pump Heads , any good?
Post: RE: Cheap Chinese Pump Heads , any good?

I wouldn't even buy that as an expensive desk ornament tbh
Chairchild XUD Section 16 2,864 19-02-2015, 12:49 PM
    Thread: MLS headgasket enquiries.
Post: RE: MLS headgasket enquiries.

CR is a simple measurement of volume - it has nothing to do with boost.
Chairchild XUD Section 14 2,378 18-02-2015, 05:43 PM
    Thread: forged rods xud
Post: RE: forged rods xud

(17-02-2015, 01:30 PM)vinny Wrote: i think the killer with the xud is the ridiculous weight of the pistons 864g a rod and piston about 1.6 kilos Just weighed my Rover L series conrod, pisoton, and g...
Chairchild XUD Section 19 3,748 18-02-2015, 07:14 AM
    Thread: MLS headgasket enquiries.
Post: RE: MLS headgasket enquiries.

(15-02-2015, 05:10 PM)vinny Wrote: use the mls its loads better just buy the thickest one if ur running more boost than standard And your reasoning behind this is?
Chairchild XUD Section 14 2,378 15-02-2015, 09:45 PM
    Thread: MLS headgasket enquiries.
Post: RE: MLS headgasket enquiries.

increasing the piston to head clearance does three things: 1) reduces static CR, so an immediate (if minimal) performance drop 2) reduces the amount of squish, which whilst not *as* important on an ...
Chairchild XUD Section 14 2,378 15-02-2015, 02:50 PM
    Thread: Gt2359v
Post: RE: Gt2359v

ping off the arm, and see if you can move it - should flap about with ease
Chairchild XUD Section 25 4,993 02-02-2015, 06:53 PM
    Thread: Bosch Pump inquires..
Post: RE: Bosch Pump inquires..

12v signal - quite a low frequency (same as required by an N75 solenoid IIRC) Easy enough to set up 100% at idle, and a linear ramp down to 0% at max rpm - then just tweak from there :) The Rovers th...
Chairchild XUD Section 7 2,328 31-01-2015, 08:19 PM
    Thread: Bosch Pump inquires..
Post: RE: Bosch Pump inquires..

look under where the injection lines come out of the pump - under the high pressure head. If you see two wires going into a solenoid, in-line with the axis of the pump, it's got a timing solenoid. Th...
Chairchild XUD Section 7 2,328 31-01-2015, 06:36 PM
    Thread: Turbo Terminology
Post: RE: Turbo Terminology

Feel free to read my Dissertation: Mechanical control of variable turbine turbochargers Expands on some minor details :)
Chairchild XUD Section 12 2,581 30-01-2015, 07:57 PM
    Thread: Td04 hybrid help
Post: RE: Td04 hybrid help

Just grab a GT1752 - much better out of the box than any TD04 :) The second you even *loosen* the compressor nut, it'll need rebalancing - and no company will touch a turbo they haven't rebuilt them...
Chairchild XUD Section 5 1,035 26-01-2015, 10:02 PM