20v head + MK4 2.0L AEG, AZG, and newer (NOT ABA, NOT 9A, NOT G60, etc)

[twicepardoned]

It's all good but wouldn't that be ok if you're throwing a turbo on with high boost?

[Dafljigga]

Wait im confused, I want to know if those pistons fit in the block ? If those pistons were to be used and the AEB rods were to be used it should raise the C/R and create a plauseable application. How does that sound instead of having custom pistons made. Please let me know because this is interesting

[twicepardoned]

That's exactly what I've been trying to find out... If there are pistons already that can be swapped in I'd rather do it than chopping up some.

Because then it doesn't seem so hard either

[mag_wagon]

I have spent the good part of the hour reading all these posts and threads and it all just sounds soooo complicated. To me, why not just get a whole damn 1.8T engine and ecu and sell the 2.0 litre for cheap or keep it as a project motor. I am certainly not an expert on swapping, however, I believe a full long block 1.8T setup dropped in an MK4 2.0 car would only present minor mod problems such as the cooling system. The mount points should be pretty much the same considering the platforms and chassis are identical and they receive three different motors. I am fairly certain the transmissions are the same. I know for a fact the gearing is the same, unless the flywheel and bell housing are different. I do not know, I am just throwing crap out there. I would like to know more, because I know my 115 horse 2.slow is weak sometimes, and there are no good mods to do for this car that are inexpensive and practical. I have done some custom mods on older VW mods, but doing a complete turbo setup on the stock 2.0 8V motor would involve forged pistons, a rebuilt top end, all the turbo components, plumbing for air, oil, and water, and a serious up on the fuel system and electronics. Utter nightmare and ten grand that could be used as a downpayment on a GTI or Jetta that already has a 1.8T and can be easily modded and upgraded for big power gains for less than a grand! At this point, I have accepted the fact that the 2.0 8V aeg/azg is pretty much unmoddable without serious funding, time, and mechanical knowledge. I admire you guys for trying out this stuff and researching and solving the dilemmas, I just do not have the patience for such an immense project. If I get desperate I will add one of those electric superchargers that operate like a garbage disposal in your intake tube! the silly stuff they make these days!

[vwpat]

I have a n/a 2.0 20V engine kit for sale.

[2deepn2dubs]

Does this thread include the BGD? ...im in the beginning research stages of a 2.0 20v, i have a BGD shortblock with 40k, is this good for the 20v head? it has oil squirters and a huge oil pump... compared to the AEG which i didnt see any oil squirters and it had a tiny stock looking oil pump.

Also are the stock pistons ok to use if i notch them, or are they junk? thanks in advance

Modified by 2deepn2dubs at 12:47 PM 4-22-2008

[2deepn2dubs]

well heres the BGD i have... whats up with this huge oil pump??





Modified by 2deepn2dubs at 7:39 AM 4-24-2008

[2deepn2dubs]

ok so has anyone had any problems running notched/clearanced pistons? is it better to notch 9a pistons rather than the stock 2.0l pistons? do we know if the 30v audi pistons will work without modification? ...if so whats the c/r of that setup?

[polov8]

Quote, originally posted by 2deepn2dubs »

well heres the BGD i have... whats up with this huge oil pump??

It's a housing that contains twin balancer shafts aswell as the oil pump. It can be ditched and replaced with a transverse 1.8t oil pump.

[2deepn2dubs]

what do the balancer shafts do, better to have? will an aeg oil pump work?

[2deepn2dubs]

heres some pics i took of the AEG block...

notice no oil squirters...

[JustTheTip]

What exactly are you trying to do w/this build...

[2deepn2dubs]

Quote, originally posted by ScmK4VduBB »

What exactly are you trying to do w/this build...

2.0 20vT

[2deepn2dubs]

soooo, whats everyone doing for eng mangmnt?

[Audi4u]

Ros and piston would cost about $1k. Is it really worth trying to notch stock pistons?

[Issam Abed]

Quote, originally posted by 2deepn2dubs »

soooo, whats everyone doing for eng mangmnt?

You are in Fresno
Why not go to 034 Motorsport?

[don1588]

as for the piston problem that has been mentioned in this thread, wouldnt it just be easier to get a set of overbore 1.8t pistons?

[elRey]

Quote, originally posted by don1588 »

as for the piston problem that has been mentioned in this thread, wouldnt it just be easier to get a set of overbore 1.8t pistons?

1.8T pistons have an incorrect compression height (wrist pin location). If you threw 82.5mm 1.8T pistons in the pistons would hit the head @ TDC.

[don1588]

unless perhaps you get some custom rods or custom crank, maybe both just for giggles

[PantyBeef]

what if you used a head spacer? if you were going turbo.

[don1588]

a head spacer in combonation with oversized 1.8t pistons would be a good idea, If you could keep your compression ratio high enough for the motor to run properly.

It basicaly works like this, if it takes a .0625 headspacer to clear oversized 1.8t pistons in a 2.0 block, and said headspacer drops compression 1-2 hole points, then you would need piston custom machined to be 1-2 points higher in compression than stock 1.8t pistons.(if you wanted to run the factory 1.8t turbo pressure).

I could be wrong tho, it might actualy work just fine with just a properly sized head spacer and oversized 1.8t pistons, because essentialy I guess there would be the exact same compression distance between the head and the piston as whats in the 1.8t.
If someone could identify which one of my ideas are correct, then we might have this problem solved.


Modified by don1588 at 12:46 AM 10-11-2008

[Fenn]

does anyone know what cambelt, tensioner and cam pulley to use on a AEB head on an AQY (mk4 2.0l 8v crossflow) bottom end?

[elRey]

Quote, originally posted by Fenn »

does anyone know what cambelt, tensioner and cam pulley to use on a AEB head on an AQY (mk4 2.0l 8v crossflow) bottom end?

internal waterpump 1.8T cam gear, t-belt, and tensioner

[Fenn]

THANKS

[lilgreydentwagen]

ok so i started hearing about the 30v v6 pistons do they freaking work or not? i'm building one and everyone seems to still be arguing about it one year later. i know JE makes pistons for this application. jrc has a lot of info, but if i can get a sset of the 30v pistons for half the price that would be even better

[rx2tones]

ok so i started hearing about the 30v v6 pistons do they freaking work or not? i'm building one and everyone seems to still be arguing about it one year later. i know JE makes pistons for this application. jrc has a lot of info, but if i can get a sset of the 30v pistons for half the price that would be even better

the 30v piston may work but you wont be able to run a big cam or alot of boost

------------------------------------------------------------------------------
my $hit.......
http://forums.vwvortex.com/zerothread?id=4262428

[lilgreydentwagen]

aggh screw it i'll just cough up the 800 bucks for a set of je pistons. as for engine management i'm just goin with megasquirt, or just piggyback the digifant I for extra fuel + waste spark

[AutoCrosser11]

Quote, originally posted by lilgreydentwagen »

aggh screw it i'll just cough up the 800 bucks for a set of je pistons. as for engine management i'm just goin with megasquirt, or just piggyback the digifant I for extra fuel + waste spark

I got a SMT-6 smart tuner if your interested. but really I would run megasquit

[vw collector]

Any solid answers on the use of the 30v pistons on the AEG 20/20T?

[l88m22vette]

Just to throw this out there, isn't it just a lot easier to just build a 2.slow out of a 1.8T?

[elRey]

Quote, originally posted by vw collector »

Any solid answers on the use of the 30v pistons on the AEG 20/20T?

ask vwpat directly. I believe he may have some insight into this.

[vw collector]

Quote, originally posted by elRey »

ask vwpat directly. I believe he may have some insight into this.

[lil_medic_vdub]

Will the 20V head from a vw beetle 1.8t fit a mk4 golf 2.0??? dont bit me if i said sumthin silly!

Thanks

[mk4_2.ho]

subscribed...going 20v NA in the daily beater, so this is getting me started on the right foot...now to chase software.

[mk4_2.ho]

want some more info? i got it!

i've been attacking this build for 3 reasons:

1: i have a BRAND NEW aeb head in plastic in my shed.

2: i have an avh code 2.0 block that needs rings (previous owner dumped the full quart of marvel into a near-empty crankcase, washed the rings out)

3: my 2.0 jetta needs more power and a 16v swap, while cheaper, could end up being MORE work.

here's what i've found:

--eurospec 83mm 5v pistons with 1.8t rods WILL clear the 5th valve with a 2.0 crank.

--your stock 2.0 crank is fine, though 03-up guys may want to ditch the balancer and ginormous oil pump and replace with an earlier design.

--if you use the european head gasket, your compression will stay at whatever your piston is rated for (or so i hear, i have yet to bolt the head on and get hard numbers).

--YOU DO NOT NEED TO ORDER CUSTOM PISTONS (other than bore size)! i am using pistons designed for a 1.8t and they clear just fine with the appropriate matched rods (which is factory for now, new scat rods will go in next week, then the final build takes place). of course, this is turning by hand, but i do not see the pistons going anywhere near over the top of the piston wall. and yes, they are coated with LOTS of assembly lube.

this all being said, i hope it inspires more to take the plunge. it is NOT a cheap proposition (i have $1300 into it so far without rods), BUT it promises more power, a stronger bottom end, and better breathing up top.

oh yeah, there was a factory 2.0 20v, it used 82.5mm bore pistons with a 92.8mm stroke, i am researching it, it is engine code alt. researching this motor will give us all more insight into the swap itself (namely rods).


Modified by mk4_2.ho at 10:08 PM 10-18-2009