GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: Rixy on 18 April 2011, 21:20
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Hi peeps, im gonna start the tuning on my mk3 tdi finally. Just wanna clarify a few thing first.....
What boost does the stock setup make? I've fitted the guage, but i cant find a t piece to plumb it into the car yet. Do i Plug the guage into the boost pipe feed comin from the inlet elbow up to the ECU?
Also, i've fitted a tuning box, i've had it for ages but never fitted it as i wasnt sure if it was any good,however its fitted now, and it has made it better for sure.
I have set the adjusment screw on the box at what i think is a safe level, when under full load there is a light haze of smoke, but nothing black, and it goes really well. Also, i can always hear the wastegate opening after about 2k of revs, so is it worth fitting a Manual boost controller so i can hold the boost on a bit?
What is a safe level for boost? I've heard about 18 i safest high boost for the turbo and the engine internals? if this is the case, i'll stick at around 15 so im well below?
cheers for ur input peeps :-)
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Be carefull with turning the boost up on a manual controller, it could end in tears.
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i know matey, i've done alot of diesel tuning in the past, know what im doing, but just wanna know a bit more about the mk3 setup, as im used to the earlier mk2 GTD setups and the like.
I have just stumbled across the TDI forum though, and found nearly everythin i need on there, so this thread is kinda useless now, lol....
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I believe TDI110 injectors are an upgrade that is worth doing. :smiley:
The turbo is the limit for boost really
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yup, the .205's are the 110 jobbies, or even the 150bhp T4's .216's :-)
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.216 it! i did loads of looking into tuning one these engines and well 2k can get one of these to 250bhp on standard internals :D
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http://cgi.ebay.ie/VW-Transporter-T4-TDI-injector-nozzles-0-216-Bosch-x5-/330552893219?pt=UK_CarsParts_Vehicles_CommercialVehicleParts_SM&hash=item4cf67cdf23
So ya just pop these in and remap and instant bhp gain ??
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pop them in and a chip will go from 90 bhp to about 110bhp-120 (if your lucky) dont need a remap.
but youl make alot of smoke.. to get rid of that just change the turbo :D
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nice what turbos just bolt on though
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Hi peeps, im gonna start the tuning on my mk3 tdi finally. Just wanna clarify a few thing first.....
What boost does the stock setup make? I've fitted the guage, but i cant find a t piece to plumb it into the car yet. Do i Plug the guage into the boost pipe feed comin from the inlet elbow up to the ECU?
Also, i've fitted a tuning box, i've had it for ages but never fitted it as i wasnt sure if it was any good,however its fitted now, and it has made it better for sure.
I have set the adjusment screw on the box at what i think is a safe level, when under full load there is a light haze of smoke, but nothing black, and it goes really well. Also, i can always hear the wastegate opening after about 2k of revs, so is it worth fitting a Manual boost controller so i can hold the boost on a bit?
What is a safe level for boost? I've heard about 18 i safest high boost for the turbo and the engine internals? if this is the case, i'll stick at around 15 so im well below?
cheers for ur input peeps :-)
Pics?
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im sorry to say this but some of you are right and some wrong i did motorsport engineering at uni and used my vento tdi as a uni project to see what pwoer gains come from certain mods.
For 1 you cant adjust the boost on a tdi mk3 as i have tried! manual boost controller, diode between pins 1 and 6 on the air mass to fool the car into thinking its creating less boost the works the only way is a remap as i did the diode and it hit 2 bar! and went into limp mode
As for mods fit a set of .216 nozzles like someone mentioned above as that gained me 23bhp just from that does give a bit of black smoke but still fine, i also tested a front mount intercooler only gained 1.4bhp but gained 10Ft-lb due to the denser air it was receiving
I also fitted a PD inlet manifold as thses are meant to be the 'boys' and their just not it was a 150bhp one and it actually caused the vehicle to loose power 3bhp over the full rev range even tho it has equal legth tracts and enlarged port
And no one in this country does a custom remap if youve got other mods on the vehicle so my suggestion is get on the tdiclub.com and get reading up and vw mickel is the guy you want send your ecu to america and itll be sorted
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i'll get a pic later, but this a proper old skool tuning box? looks like it was made years ago. Its basically a PCB in a metal box, with a screw on lid, and 2 x genuine vw plugs comin out of it. Plugs directly into the pump, and has wires comin from engine speed sensor, accelerator potentiometer, and 2 from ecu (i've checked these on wiring diagram - come from pins number 2,3,4 and 5 if i remember rightly??)
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yeah know them had 1 fitted to mine until i removed it, they do make a difference but all its doing it tricking the pump into intorducing more fuel, may as well just fit bigger nozzles far safer way of doing things
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for sure, nozzles will be comin my way as soon as i get some spare cash, or sell summit to pay for them :-) this is only gonna be a temp fix until they arrive :-)
What nozzle's are best though, .205's or .216's with a bigger front mount intercooler, and poss a stainless 2 1/4 downpipe and de cat??
Will prob get a remap too after a little while if i can run the nozzles on standard ecu for the time being that'd be ace :-)
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.216 nozzles off ebay 55 quid thats what i did and wouldnt bother with downpipe or intercooler unless your fitting a big turbo best thing is remap 300 quid would see injectors and remap so about 125 wheel horse power maybe more
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i see :-) might get round to gettin some of them then, though i'd heard bad things about the cheap nozzle's? i was advised to stay clear of them, nd go for genuine bosch ones??
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well iv been running mine for 6 motnhs with no problems ata ll so up to you
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on the tdi forum, under the faq's bit, it says that when setting up the car on new nozzles etc, you have to "install a bleed on the pressure sensing line that goes to the ECU so that the resistance upstream (to sensing line) and downstream (to atmosphere) of the ECU sensing port is about equal, and you install a mechanical boost controller in parallel with the standard N75 system calibrated to 17 psi maximum boost pressure which experience has been found is sufficient to adequately control exhaust smoke"
What does it mean by the bleed valve between upstream and downstream? is this the pipe from the inlet elbow to the ecu (upstream) and the one that goes to the wastegate? (downstream??)
im confused, i wanna fit my boost controller, and want to do it all as per the above......
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right starters mine wont boost to 17psi itll only do that when the vehicle has been remapped as the bleed valve cant changed this believe me iv tried, its only capable of 17psi cause thats whent the turbo reaches it heat soak point.
Tbh all i did was fit a bleed valve in between the n75 valve and that was it, just to prevent the car boost spiking too much, mines smokes but who cares??
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so does the bleed valve go between the n75 and the turbo then, on the red pipe, same as the boost guage?? my turbo spikes like a pig, and the guage flies round to 15 or 16psi, then drops of instantly to around 10.........
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mine does the same but doesnt bother me as its only a problem if its spiking massivley out of the range of the turbo or engine, as your fitting bigger nozzles itll have the fuel to cope so dont worry bout it tbh
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I'm also thinking of fitting bigger nozzles on my tdi vento but it's got a tuning box fitted with a pipe that goes to a valve near the air box. What is the valve and what would I do with the pipe when nozzles fitted?
Kimmy
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if ur fitting bigger nozzles, i'd take the tuning box off if i were you, or so i understand from reading stuff on the internet.
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Yeah sorry I ment to put what do I do with the pipe when I have removed the tuning box. Just blank it off or should the pipe go to somewhere else? Is it also a good idea to blank the egr valve off?
Kimmy
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i blanked mine off but iv just lost the keys to my car so now im breaking it as the immobiliser has screwed it lol so if you want any bits drop me a line
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That's not good davies! You blanked the pipe off? Or the egr? What bits you got dude?
Kimmy
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blanked the pipe with screw and put a plate in the egr iv got
front mount intercooler kit
.216 injectors
a tuning box in the garage
pd inlet with allard pipe (fits well can get pics)
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You have a pm mate. What pics you got then?
Kimmy
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finally i've sold a few odd bits of tat from in the garage, and now i have some cash to buy some bits....... :-)
davies - you have PM
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So I should have davies front mount cooler and injectors coming my way soon can't wait to get them fitted and get some extra power. But is there any other mods I could do like to the fuel pump or anything? Because I got told that the Vento can't be remapped. It's the 1z engine.
Kimmy