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20vt or tfsi conversation?

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which one and why?

Quick Monday night question, why a 20vt instead of the newer tfsi?

The 20vt engine conversation is still very popular, especially as the older AGU engine can be bought pretty cheap nowadays.
There are quite a number of big power 20vt's out there, but it would appear to you still have to spend a lot of money to get reliable big power from one. (Forge Motorsport Berg MK1 is probably a good example).
So why not a just use a tfsi engine instead and retain factory reliability?

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im not too clued up on this sort of thing, but isnt there alot more plug and play items for a 20vt, where as tfsi is alot more work?

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If you got £££ go for the TFSI mate. As you say the AGU conversion can be done relatively cheaply yourself and the mounts etc can be bought off the shelf whereas the TFSI stuff can't I don't think :)

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Does the TFSI engine use different mounts to the 20VT?

Butleraw '83 Schwarz Black GTI

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Assuming im thinking about the right engine does it not have a very high pressure injection system which would add to the complexity.

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I'm using Epytec mounts for a TFSI conversion.

1.8T side engine mount and 02J gearbox mount.

I have JMR world Cup style front and rear mounts, the front will have to be modded slightly.

The engine needs a fuel pressure or around 6.6 bar iirc, the high pressure cam driven pump does the rest.

I'll get a thread up for mine when I start it!

Last edit: by Dirrt

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I will be interested to see how you get on.  I would like to fit a TFSI engine to my mk1.  Just waiting for the DX to blow up!

Butleraw '83 Schwarz Black GTI

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Do it man, people are just afraid of them because of the lack of info, just like 1.8T's at the start!

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I think I will.  I used to own a Mk5 Golf GTI.  It had really nice power delivery.  That engine in a mk1 at half the weight would be awesome!  I can imagine 5 years down the line, it will be the most popular conversion.

Butleraw '83 Schwarz Black GTI

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Dirrt said


The engine needs a fuel pressure or around 6.6 bar iirc, the high pressure cam driven pump does the rest.

I'll get a thread up for mine when I start it!

QPeng website mentions that the original k-jet pump, provided in good condition, should be able to provide enough fuel pressure. I believe the k-jet pump delivers around 5 bar.  If so, that's one less thing to worry about.  :thumbs:

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That could be for the standard Mk5 Gti 200bhp K03 turbo engine.

I have a K04 turbo engine on the way for my Mk1, should be here next week.

Its a BYD out of a Seat Leon Cupra 240 BHP, same as an ED30 Gti engine.

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I thought the Seat engine code was BWJ?

Either way, looking forward to your thread.  :thumbs:

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BYD is another code, sorry its 230bhp, same Turbo and internals as S3 my-gti.com - my gti Resources and Information.

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biggest issue is the ecu is very picky, it throws a wobbly if it cant talk to the other car modules so it needs tinkering to work properly in an early car.

other problem is that the rev counter and some of the other signals comes out the CAN BUS, so you would need some kind of device that can pull this signal out and convert it to the mk1 clock signal, though of course you could fit later clocks if you wanted.

everything else can be sorted relatively easily as already mentioned.

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