GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: bloo on 27 May 2006, 21:03
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im looking into buying a mk4 1.8 turbo a few people have told me they did a couple of different engines for them i was wondering if some one could tell me which is the best one to go for and how to tell them apart?? thanks in advance guys!!
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http://www.golfgtiforum.co.uk/index.php?topic=40194.0
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I'm not an expert on this subject by any means, so have a search under Engine codes.
From memory I think my 2001 150 bhp turbo has an engine code that starts AUM and has a slightly better Turbo (Ko3 Sport?) than earlier models and is DBW (drive by wire throttle) so can be re-mapped up to around 220bhp
AUQ engines were in the 180bhp Anniversary models and also some newer standard Turbo's
You can find the engine codes in the boot near the spare wheel and should be printed somewhere in the VW handbook with the car.
Hope that helps, and i'm pretty confident that i have been fairly accurate??
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With regards to the best one, if you look at my link above, the later 2 engines will re-map to the highest amount from standard, & the first one the least amount.
It's generally considered that the earlier (AGU) is the strongest lump & will take to the biggest mods better than it's successors. ie. 350+ bhp.
It all depends how much you've got to spend on the car, how far you want to mod it or are you going to leave it standard etc.
If your a standard man, & you want the quickest, then go for the 180 (AUQ).
Or if you're looking for 220bhp for an extra £420ish (from a Revo 're-map'), then go for either the AUM 150 or AUQ 180, as they will both re-map to the same power. (225ish bhp) :smiley:
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With regards to the best one, if you look at my link above, the later 2 engines will re-map to the highest amount from standard, & the first one the least amount.
It's generally considered that the earlier (AGU) is the strongest lump & will take to the biggest mods better than it's successors. ie. 350+ bhp.
It all depends how much you've got to spend on the car, how far you want to mod it or are you going to leave it standard etc.
If your a standard man, & you want the quickest, then go for the 180 (AUQ).
Or if you're looking for 220bhp for an extra £420ish (from a Revo 're-map'), then go for either the AUM 150 or AUQ 180, as they will both re-map to the same power. (225ish bhp) :smiley:
cheers for the info ivor!! i cant afford a 180 bhp one!! only got 6-7k to spend when did they start making the the aum lump??
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late 1999/2000
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Hey Ppl, :wink:
Im still abit unsure with this... so if i was to say that i am looking for a Golf GTI 1.8T 20v 150 :cool:
And that i was going to remap it, ss exhaust and air filter..
a) which would be the best engine to go for
b) is there a certain way of knowing which engine is in which year or is it just hit an miss
I understand that AUM will remap to 220-230 bhp (same as the 180 AUQ engine) but the AGU is a stronger block ??
c) should i go for the AUM because i want more power.... ?
d) what is the difference between the AUM and AUQ apart from the obvious 30 bhp.
Also what does DRW - Drive-By-Wire mean ?
Hope someone can help :smiley:
Regards,
Ryan :wink:
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a) go for the latest engine within your budget
b) the 3 letter engine code is stamped into a tag on the left hand side of the head, take the plastic engine cover off to see it.
The AGU is not a stronger block, it just has a larger ported head than the other 1.8T engines. The only 20v's with stronger internals are found in audi TT 225's, S3's and some (late ones ?) Ibizas. From memory these have stronger rods and bigger wrist pins.
DBW = drive by wire, no throttle cable.
NDBW = .. well, work it out :wink:
c) AUM has VVT, so sure, go for it. AGU would be more the choice if you were going to go BIG turbo.
d) as far as i know its just different mapping in the ECU.
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Thanks for that topher spot on :wink:
But, i dont think i will be goin for the big turbo... maybe in few years time but its not an option for me at the moment. All i will be doing, is ss exhaust (de-cat maybe :undecided:) Air filter and re-map. Plus few other things..... i want to get it up to about 250bhp that bout it for now..
So would i be best with a AUM or a AGU for this ? (forgettting about the big turbo :smiley:)
Regards
Ryan :wink:
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the agu engine is stronger so should be able to handle more power
but if you are only looking for around 250bhp the later aum should do the job fine
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Looking at what you're going to get done, your probably only going to get about 205 hp (+/- 5 hp) with the AGU, & about 230 (+/- 5 hp) with the AUM.
Wish I'd researched/stumbled accross this about a year ago. I probably would of got a newer model with higher miles, rather than an older one with low miles!
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Thanks for that topher spot on :wink:
But, i dont think i will be goin for the big turbo... maybe in few years time but its not an option for me at the moment. All i will be doing, is ss exhaust (de-cat maybe :undecided:) Air filter and re-map. Plus few other things..... i want to get it up to about 250bhp that bout it for now..
So would i be best with a AUM or a AGU for this ? (forgettting about the big turbo :smiley:)
Regards
Ryan :wink:
You'll never get a REAL 250bhp out of either of those engines on their standard turbos, without using nitrous. With filter, exhaust, decat and 4bar fpr, fully mapped to suit.. you'll be knocking on 230. K04 turbo upgrade would give you a nice reliable 250-260 bhp without stressing the engine. It really doesn't matter which base engine you start with, like i said strength-wise all the golf engines are the same. You might get a bit more power at the sacrifice of some torque with the AGU head.
Next person to say the AGU is stronger gets to wear the dunces cap :grin:
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Next person to say the AGU is stronger gets to wear the dunces cap :grin:
I say the last person! :tongue:
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the agu engine is stronger
okay :grin:
(http://www-uxsup.csx.cam.ac.uk/~fanf2/hermes/doc/talks/2004-05-techlinks/dunce.png)
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:grin:
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AGU also has the larger 20mm Piston pins.
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The "vag technician" who tried to sell me 19mm rods for my AGU has just received an email slap. i r teh dunce.
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they all have 20mm pins apart from the AUQ (19mm). I found this out the hard way when I went to install BAM pistons into my AUQ lump and ended up having to buy new con rods to fit. great excuse to get forged ones though :D
The AGU lump has the larger valves yes. This only becomes beneficial at 300bhp+. Before that the small valve heads actually produce better results. I could go into why this is, but I'll save it for a talk around a BBQ sat in a field ;) There are people saying the AGU has a forged crank rather than a cast one. I've never heard of anyone snapping a crank...
As with all the k03 (and sport) turbo'd engines you'll only get 210bhp from them regardless of your special intakes or miltek exhausts. The NBDW engines will get better results than the DBW ones that's a fact.
personally if you have the intention of doing more than an air filter and exhaust buy a NDBW 150 lump.