20v T into 1981 Coupe GT

BryFlyinBy · 29-06-10, 04:32 PM

Right guys, as I strip down the front of the Gt to perform the full resto, I am pondering on what to put under the bonnet to give me the performance hike I'm looking for.
Initially I was going to go down the full quattro route on the drive train and was considering a V6 from an S4 - but on doing some research and hearing on here somewhere theres only a couple of hundred taxed GT's left in the country!!
This has made me reconsider as chopping up the old girl to fit said drivetrain is going to ruin her originality.

SSOOooooooo iwas thinking more along the lines of keeping the original 5 pot lump to return to standard if I wished and thinking along the lines of fitting a 20v turbo lump from something VAG/Audi with a bigger turbo for extra giggles.

Question is has anyone done this yet??
Will the North/south engine layout create any problems??
Should I use existing gearbox??
Would a six speed from Seat CUpra work ?? size issues??
Would the 4 pot engine mounts fit???

Soooo many questions, can someone help by answering a few??

SteveT63 · 29-06-10, 05:00 PM

Yes Tonks has put one in a Cab, which is a similar layout to your GT. Its still front wheel drive, straight swap using original FWD gearbox. Its a Boxster eater!

BryFlyinBy · 29-06-10, 08:11 PM

Thanks Steve, do you or anyone else know whether there is issues with the wiring can I retain the existing dash or do I need to use later gauges etc?
I honestly don't know much about the electrical side of things - I'm hoping it will be a case feeding power to the new engine mangement and use the 20v loom from there??

pimpdriver · 29-06-10, 09:35 PM

What do you mean by 20vT???

5 pot out of S2?

Or 4 pot 1.8t from A4, A3'etc?????

Seat gearboxes are transverse so big problems there.

BryFlyinBy · 29-06-10, 10:09 PM

Sorry Pimpdriver, reading the vw mags they seem to refer to the 1.8t as the 20v turbo, I was following their lead I meant the 1.8t as you suggest.
I was thinking about the Seat box as its 6 speed and FWD - forgetting as you point out its transverse, my bad - any other suggestions???

ZermattGT · 29-06-10, 10:10 PM

I know its been done to a CQ on this forum.
In the US a few guys have transplanted turbo motors from early UrQ's or early 200 TQ's ( the 5000 Turbo in the States)

BryFlyinBy · 30-06-10, 04:15 PM

I certainly think I have confused my questions for you guys the engine I am looking at replacing my 5pot for is the 4 cylinder 1.8 turbo engine found in most Audi TT's Seat Cupra's A4's etc..
Not the 5pot S2 engine that has 4 valves per cylinder.
So if anyone has info on this transplant please raise there hands!!!

Tonks4x4 · 30-06-10, 04:41 PM

My understanding of the 1.8t engine is that you get a very unreliable 250-300 bhp out of them.

The 5 pot S2 20vt the sky is the limit depending on the depths of your pocket.

And the S2 engine can be fitted over a weekend. instant 220bhp for 3B engine code and 235bhp for the ABY engine code both of which can be chipped to 270-290 bhp for little money.

HTH

BryFlyinBy · 30-06-10, 08:16 PM

Fair point Tonks, was thinking that maybe the shorter, possibly lighter 1.8t might do better to re-distribute the weight further inboard.
Going with the 5pot S2 I still have a lot of weight over the front and no 4wd to aid the handling.
Plus I was hoping to get a front mounted intercooler behind the grill and still have it looking stock
If someone can tell me that its not going to make a difference on the handling, buggering about fitting the smaller engine then I'll fit the big 5
Thought the newer technology would give me the edge on performance and reliability.???

pimpdriver · 30-06-10, 08:19 PM

I haven't done either, but I think 5 pot and 4 pot engine mounts are different (Tonks will be able to confirm) which will require chassis welding.....

29-06-10, 05:00 PM	#2
SteveT63 Senior Member Classic Audi Club Member Join Date: Sep 2008 Posts: 3,045	Yes Tonks has put one in a Cab, which is a similar layout to your GT. Its still front wheel drive, straight swap using original FWD gearbox. Its a Boxster eater! __________________ Peace...........through superior acceleration! T85 1985 90quattro I5 20vT T81 1983 80 Sport Red T81 1983 80 Sport Silver

29-06-10, 10:10 PM	#6
ZermattGT Quad Lamp Commando Classic Audi Club Member Join Date: Nov 2008 Location: Massachusetts, U.S.A. Posts: 4,299	I know its been done to a CQ on this forum. In the US a few guys have transplanted turbo motors from early UrQ's or early 200 TQ's ( the 5000 Turbo in the States) __________________ 1983 US Model Zermatt Silver Coupe GT

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29-06-10, 08:11 PM	#3
BryFlyinBy Grown up member Classic Audi Club Member Join Date: Oct 2008 Location: Swindon, Wilts Posts: 641	Thanks Steve, do you or anyone else know whether there is issues with the wiring can I retain the existing dash or do I need to use later gauges etc? I honestly don't know much about the electrical side of things - I'm hoping it will be a case feeding power to the new engine mangement and use the 20v loom from there??

29-06-10, 09:35 PM	#4
pimpdriver Devon Pastie Muncher Classic Audi Club Member Join Date: Jul 2007 Location: Calne Wiltshire Posts: 7,530	What do you mean by 20vT??? 5 pot out of S2? Or 4 pot 1.8t from A4, A3'etc????? Seat gearboxes are transverse so big problems there.

29-06-10, 10:09 PM	#5
BryFlyinBy Grown up member Classic Audi Club Member Join Date: Oct 2008 Location: Swindon, Wilts Posts: 641	Sorry Pimpdriver, reading the vw mags they seem to refer to the 1.8t as the 20v turbo, I was following their lead I meant the 1.8t as you suggest. I was thinking about the Seat box as its 6 speed and FWD - forgetting as you point out its transverse, my bad - any other suggestions???

30-06-10, 04:15 PM	#7
BryFlyinBy Grown up member Classic Audi Club Member Join Date: Oct 2008 Location: Swindon, Wilts Posts: 641	I certainly think I have confused my questions for you guys the engine I am looking at replacing my 5pot for is the 4 cylinder 1.8 turbo engine found in most Audi TT's Seat Cupra's A4's etc.. Not the 5pot S2 engine that has 4 valves per cylinder. So if anyone has info on this transplant please raise there hands!!!

30-06-10, 04:41 PM	#8
Tonks4x4 4 ring whore! Classic Audi Club Member Join Date: Oct 2008 Location: Huthwaite, Nottinghamshire Posts: 2,607	My understanding of the 1.8t engine is that you get a very unreliable 250-300 bhp out of them. The 5 pot S2 20vt the sky is the limit depending on the depths of your pocket. And the S2 engine can be fitted over a weekend. instant 220bhp for 3B engine code and 235bhp for the ABY engine code both of which can be chipped to 270-290 bhp for little money. HTH

30-06-10, 08:16 PM	#9
BryFlyinBy Grown up member Classic Audi Club Member Join Date: Oct 2008 Location: Swindon, Wilts Posts: 641	Fair point Tonks, was thinking that maybe the shorter, possibly lighter 1.8t might do better to re-distribute the weight further inboard. Going with the 5pot S2 I still have a lot of weight over the front and no 4wd to aid the handling. Plus I was hoping to get a front mounted intercooler behind the grill and still have it looking stock If someone can tell me that its not going to make a difference on the handling, buggering about fitting the smaller engine then I'll fit the big 5 Thought the newer technology would give me the edge on performance and reliability.???

30-06-10, 08:19 PM	#10
pimpdriver Devon Pastie Muncher Classic Audi Club Member Join Date: Jul 2007 Location: Calne Wiltshire Posts: 7,530	I haven't done either, but I think 5 pot and 4 pot engine mounts are different (Tonks will be able to confirm) which will require chassis welding.....