#1
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Adjusting Turbo pressure
I think I've done everything for a good basic Stage 0 tune now:
- new Cam Belt - MLS 2 notch headgasket (with new but standard bolts) - new IP timing belt - IP timing set to 0.95mm - Monark (0SD273 type) nozzles running 165 bar - Oil flush and couple of changes (now with quality 15/40 semi-synth) - Fuel filter - Air filter - calibrated boost gauge showing 10psi max boost I have the standard factory turbo and intercooler, so I was going to take the turbo pressure to about 15psi - maybe a couple higher, and obviously up the fuel to suit aswell. What do I need to increase the turbo pressure? Am I right in thinking I just need something like this, or are these engines a bit different to a normal turbo setup?: http://www.ebay.co.uk/itm/Turbocharg...item5ae11ab6a9 |
#2
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That is good stage zero setup. Just to ask, why semi-synth, and not full synth.?
They cost about same atleast in Finland, and are more common than mineral or semi-synth. oils in markets and part-sellers. The one you linked, will do its job. You control pressure same way than in gazoline engine, it dont differ. But. You could do it even cheaper, add plastic t-hose/clamp in middle of hose going to "pressure clock", and control max boost with amount of air your bleed to free air. Costs about 10 cents and does same, you need pressure gauge on both ones to see your max boost anyways. |
#3
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Quote:
Quote:
Is there any benefit to using the "ball and spring" type, which apparently allows the turbo to spool faster? |
#4
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By pressure clock meant wasteagte, couldn't remember correct word yesterday.
So, i meant you to bleed air from hose which goes to wastegate and controls opening of it. Same idea as in the item you linked, just cheaper way. You just named the benefit of that type of control-valve. |
#5
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http://d24t.com/showthread.php?576-B...ht=ball+spring
Just been reading that thread about ball and spring type. Unsure which to go for now - do many people on here use a ball and spring on their standard turbos? |
#6
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Just get the cheapo ball and spring type boost controller. Works fine and is too simple to screw up. Still running one on my built engine, and even on the turbo motor in my 10 sec vw...
Jason
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Back again with a '84 760 GLE D24T/ZF SOLD but not forgotten! 1984 760 Sedan, built D24Tic/ T-5 swapped My engine build: http://www.d24t.com/showthread.php?t...t=engine+build T-5 swap: http://d24t.com/showthread.php?399-W...to-quot-w-pics! |
#7
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Ok cheers. Is the one I linked in my original post a ball and spring, or bleed type?
It's either that one, or this one: http://www.ebay.co.uk/itm/MANUAL-BOO...item3a6a16d5c8 What psi would you recommend for a resonable improvement, but still preserve some MPG? And are the turbo mods you mentioned in the Performance Thread worthwhile? Something about capping off the dump valve? |
#8
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The brass one in the post above is what you want.n As for boost, I wound't go above 20 psi without having head studs. Anywhere from 15 to 20lbs of boost and the fueling to go with it will be a big increase in power. Shouldn't have any affect on mileage at all, unless you are holding it on the floor all the time. Cruising along on the highway the fuel going into the engine is the same if the pump is turned up or stock calibration. It all depends on how heavy your foot is. Did you do some kind of exhaust mods to help it breathe a little better?
Jason
__________________
Back again with a '84 760 GLE D24T/ZF SOLD but not forgotten! 1984 760 Sedan, built D24Tic/ T-5 swapped My engine build: http://www.d24t.com/showthread.php?t...t=engine+build T-5 swap: http://d24t.com/showthread.php?399-W...to-quot-w-pics! |
#9
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Cheers will get one of them then.
I assumed turning that screw up increased the fuelling all the way through, not just on heavy throttle. Too much messing with SU carbs!! It must do something though, even at idle as the revs rise slightly with it. Exhaust at moment is standard 2 box system, no cat, no egr. I am going to take the rear silencer box off and replace with straight 2&1/4" pipe soon though. |
#10
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I would remove all stock mufflers and replace with 1 straight thru style diesel muffler.
Jason
__________________
Back again with a '84 760 GLE D24T/ZF SOLD but not forgotten! 1984 760 Sedan, built D24Tic/ T-5 swapped My engine build: http://www.d24t.com/showthread.php?t...t=engine+build T-5 swap: http://d24t.com/showthread.php?399-W...to-quot-w-pics! |
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