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General => The garage => Topic started by: Chris. on 25 September 2011, 19:10
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Car is a r-tech stage 2 custom mapped car AGU with everything upgraded.
Put a set of calibra yellows in other day and a 3" maf to unleash a bit more power prior to map tweaks.
All good, just a tiny bit hunting idle and we only talking a few rpm's but seems more noticable from the exhaust at the back.
Boosts to 20-21psi peak and occasionally holds the boost at 20psi for a few hundred rpm then holds well throughout the rev range, sometimes at 13-14psi at redline from a quick glance at the guage.
HOWEVER...... there is a occasional/pretty often misfire at about 3250-3750rpm where the engine kind of splutters, not as if the wastegate is being pushed open, just what seems like a ignition issue, just like what it was doing on the denso ik22's but a bit less harsh. That is when the boost is at 20psi. Anywhere after 4000rpm and theres no misfires.
Was told it smells a bit rich, which is understandable, especially when booting it down the road.
Also feels like the power is a lot more at the top end of the rev range now.
Havent had any chance to do some logging, but inform me what blocks I need and will happily supply them.
Saves messing nicks feedback thread up!
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Have you used your old maf sensor in the 2.75" id housing? or just used the sensor that came with it?
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Got the old 20v AGU maf sensor in there.
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Got the old 20v AGU maf sensor in there.
Do a run or two with the rail pressure static at 3bar with the vac line to the fpr disconnected to see if it cleans up the 3250-3750rpm hickup. If it cleans it up then its the part load map which we increased on thr last map session causing a rich missfire.
What happens when you inrease the power linear on the throttle, instead of going to wot straight away?
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If its NOT wide open throttle straight away, its fine, after 4000rpm, WOT is perfectly fine and pulls pretty hard to redline (near enough)
Will get a run done with the FPR disconnected and see what it does.
Any blocks in vagcom that will assist?
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tested with no FPR vacuum today. Misfires like anything even on partial throttle, so disconnecting that definately made it a lot worse what with it connected.
Does sound decent though.....sounds like it has anti lag and is cammed to death on idle, especially cold start :)
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Excellent stuff, I have mine on the way and also a refurb kit for them so will get cracking. My mate found a 3" MAF housing without a sensor that he's just given to me so happy days :cool:
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Nice, managed to get mine stuck into the original k03s turbo intake pipe. Needed to grind the maf down a bit to make it thinner, but it fits.
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It sounds like its not liking the 16x16 Lambda at part load map, which was custom set to your last setup, in the past the yellow/3" setup worked well out the tin.
Just needs custom mapping to the yellows imo.
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Spot on! Bound to be out at somewhere as injectors are quite a bit bigger.
I'll get some cash built up and get her booked back in for tweaks :). Anything else you recommend fro current setup? Or not really worth it for gains?
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If the 16x16 Lambda at part load map was left as generic spec2 settings the the fuel would be fine, but on the last session I spent all that time on the dyno with them dodgy spark plugs and in the midrange I upped the fuel request. I think the quick way would be use the stock 16x16 and tweak it from there as I know its a close match for the yellows at 2.75" ID maf flow.
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How do you reckon mine will fair if I do the same as Chris? If it's not worth fitting them until I come up to you next I'll just make sure everything works fine and leave them locked away :wink:
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Looks like it would be a bit better than mine if your on a stock spec 2 map. As Nick said, we tried hard to see what we could do midrange/top end and hence there is more fuelling in there than needed for the yellow tops.
I have a fair idea how I want the car to feel when its done. I think if we can work with that extra torque you found 600rpm in the rev range quicker and get that done nicely, without putting too much stress on internals, and the power you feel on stock injectors just after the initial spike to the redline should be onto a nice one. No idea of capabilites of the turbo for that but im sure we can get something worked out :)
Ill just stick a set of NGK R in (OEM replacements) and a oil change and should be it really.
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Mine's not on a stock spec2 AFAIK, Nick did mention that the stock injectors were topped out at 229bhp so it was taken back a bit to be safe
Got plenty of time as they need to be cleaned first :wink:
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Yeah, Just a one of those things.
You will need to use the 20v upper 'o' rings though as the vauxhall ones are too chubby to fit in the 20v fuel rail.
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ah nice one, I've not long changed the O rings on the standard injectors :smiley:
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:) always worth doing.
I nicked one when putting injector in so leaked fuel. Changed it for a new one and still no leaks since it went in. Still keeping a eye on them though!
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I had the nice dirty patches around the injector seats not so long ago so replaced everything to cure that. Now the manifold is black I couldn't see them if they were leaking lol
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chris do you know is you can use red top injectors on are setups they flow a bit more then the yellow tops
i found these ones 315 cc/min , 14.5 ohms , high impedance
and these ones 350cc/min @3 bar 12.0 ohms high impedance
cant find any good looking yellow tops with out buying second hand and then getting them serviced
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Mine werent serviced.
No idea what other ones you can use, but I remember Nick saying the yellow tops have flowed 270bhp on their tests, or something along those lines - more than adequate for a k03s.
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ill keep looking for some yellows for the mo see what comes up
be nice for nick so see what he thinks on the other ones i listed if there compaterble
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get some yellows and get them ultrasonically cleaned, then you can fit a refurb kit yourself, they are about £12 :smiley:
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have u got a link to a kit wazzzer
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http://www.ebay.co.uk/itm/BOSCH-INJECTOR-REBUILD-KIT-SEALS-PINTLES-FILTERS-4-CYL-/290621730083?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43aa67ad23
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cheers wazzzer