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right or wrong?
by
bert
on 23 Apr, 2007 23:44
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Right lads,one for you :wink:
My GTD is finished,will be on the road 1st may,i have drove it and its great,the motor is a vw remanufactured AAZ with a new bosch standard pump,the turbo is a Garrett T3 off the 1.6D,the exhaust is 2.5 inch straight through with only a rear silencer.i am asking if i can spool the turbo a little quicker without altering the fuel screw which is still sealed and has not been adjusted.The poor aneroid pin has been ground and has made the car unbelievable under boost,The pump has no starwheel or anything like that,just a big spring and diaphram where the pin is bolted to under the top cap,so,will altering the aneroid spring pressure let the extra fueling come on quicker,at a lower psi pressure???
Also,i need to advance the pump from 0.8mm to 1.0 as advised by members on here,will this help turbo spooling or just lumpy cold starts?
Guys.always a pleasure :wink:
Bert
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#1
by
bert
on 24 Apr, 2007 00:02
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#2
by
lord_verminaard
on 24 Apr, 2007 07:42
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Holy crap nice GTD!!!
Advancing the pump should help spool a little faster, but you will really see the best results if you can turn the fuel screw up a little. With a modified aneroid pin, you might see some smoke under boost though but I'd say for most it's livable with the power output.
That car is really pretty. Is that a factory VW color?
Brendan
84 Scirocco 8v <-- TDI in progress
01 Jeep TJ 4.0
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#3
by
Vincent Waldon
on 24 Apr, 2007 08:37
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Others will chime in, but IMHO:
- boost is fuel... pretty much pure and simple... you've tweaked the fuel other ways (boost pin)... the big screw is the real deal. Do 1/8 of a turn at a time... ideally you have an EGT so you know when you've gone too far.
- a T3 will take its time spooling no matter what... 3000 RPM seems to be about average for most people, even with fuel/exhaust tweaks.
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#4
by
Mark(The Miser)UK
on 24 Apr, 2007 09:44
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If this is a GTD then where are you hiding the intercooler? :shock:
If this is an otherwise standard TD pump then running it at 0.8mm is wrong and more like n/a settings. Should be 1.0mm or perhaps go for 1.05mm
Nice and clean car though :wink:
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#5
by
935racer
on 24 Apr, 2007 09:51
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Get a 2.5" downpipe, that stock one is killing your spooling, turn up your fuel as well. I've never seemed to have any problem making 25psi+ at 3000rpms.
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#6
by
745 turbogreasel
on 24 Apr, 2007 11:40
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A ball and spring boost controler helps my t3 spool up sooner. evven if you set it below stock boost it will help.
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#7
by
bert
on 24 Apr, 2007 11:51
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1st thing,thanks lads for the replys :wink:
Brendan,the paint is factory it is called gambia red,LA3B code.
Mark the autodata diesel book says 0.8mm for the pump timing,yet the SB in my jetta is 0.95 if i remember,strange the AAZ is so far retarded,must be emissions and cat related,i will put it to 1.0 and try it.
Mark,intercooler is a problem,where to fit it and also the piping,its a nightmare trying to sort it out to be honest,but i will do it one day :wink:
Finally 935racer this is what im using...
and this
so,its not worth me trying to adjust the aneroid spring pressure,as there is no starwheel?? i need to crack the magic screw? :twisted:
Bert
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#8
by
deepmud
on 24 Apr, 2007 12:55
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yes you need to get to the magic screw. be ready for "wow".
And smoke.
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#9
by
935racer
on 24 Apr, 2007 14:55
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Bert I forgot to mention thats a very clean and sorted mk1!
The downpipe is where you will see the best gains, the stock one is really choking your spool up and putting your egt's higher than need be.
And definately crack the magic screw (after you do the downpipe so your egt's don't go through the roof.
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#10
by
Mark(The Miser)UK
on 24 Apr, 2007 15:47
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[Mark the autodata diesel book says 0.8mm for the pump timing,yet the SB in my jetta is 0.95 if i remember,strange the AAZ is so far retarded,must be emissions and cat related,i will put it to 1.0 and try it.
Mark,intercooler is a problem,where to fit it and also the piping,its a nightmare trying to sort it out to be honest,but i will do it one day :wink:
Finally 935racer this is what im using...
Sorry Bert didn't sink in about the AAZ :roll:
Book in front of me says 0.83 to 0.97 test range. Set to 0.9mm
This should shoot along. I just bought granny a GTD but she had a mk2 Polo that I was tempted to put a TD in. I think it would have been a little dangerous with no brake servo. Exciting though :lol:
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#11
by
HarryMann
on 27 Apr, 2007 15:27
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Bert, howdy,
Coming on fine then, what bore is that stainless exhaust, 2.25"? A friend just made me a 2.5" one for my 1.9TD, which is now stripped down to the crank (like going backwards before going forwards again)... but expecting some real torque at last for pulling this Tranporter along once its all back together... Screw that fuel screw in a wee bit, even if you have to back-off your home-brew LDA pin.
Rgds
Harry
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#12
by
bert
on 27 Apr, 2007 23:21
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Hi harry,the exhaust is 2.5" straight through,just a rear box,no center one :wink: im taxing it today if the post office let me,then its jump in and play :twisted:
BVF then lads for the meet?
??
Bert
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#13
by
Mark(The Miser)UK
on 28 Apr, 2007 05:22
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Hi Bert
What you doing about insurance? I wanted to drop a TD into a mk2 Passat from a dead Mk2 Passat and I made the mistake of asking the Insurance co. They said they only allow alloy wheels as mods! I'm thinking of taking the car off the road for a year and changing the details at DVLA because I suspect that this is where the insurance co gets its info on the car.
What did the did the MOT crew base the emissions on?
Cheers
Mark
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#14
by
stewardc
on 28 Apr, 2007 10:27
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Get a 2.5" downpipe, that stock one is killing your spooling, turn up your fuel as well. I've never seemed to have any problem making 25psi+ at 3000rpms.
X2 I changed the downpipe to a PP pipe (2.5") and couldn't believe the difference in spooling with my 1.6/T3 combo. Now with the T3 and downpipe on my new AAZ, I'm expecing even more.
