Porsche Enthusiasts Club Forum

This is my little 1.8t powered 924 project, target power is around 300bhp which isn't too hard to get with these little 20 valve engines, the current mock up engine is running around 210-220bhp map.


http://youtu.be/9pb0p1HPeHE

Sh*t! I knew that it was possible! I suspect that my current 944 Turbo is faster and cheaper than the 924S and 20vT would have been, though.

Could you tell me more about the rev counter? I can see it's got an AFR gauge built in, is it the original rev counter behind the dial or have you made one up to suit the engine/ecu?

What are you using ECU wise? I assume it's the Audi pattern engine so fitted straight on the bell housing?

Tell us more it looks like an interesting conversion and should be very rapid when finished!

Brilliant. Well done!

Share the knowledge, please...

Now that is a good choice of engine I should imagine its actually lighter than the original lump and there are so many tuning options and reasonably economical. I used to have a Leon Cupra R and loved the engine. 300bhp will be easy to get but with the standard turbo they do loose a lot of their drivability at that level. Mine was chipped to 265bhp and it started to loose some of its road manors.

Was it an easy transplant? Engine to bellhousing, engine mounts, bonnet clearance etc?

This is great, I was only thinking about this sort of transplant a couple of months ago but as with most things I just don't have the time these days but seriously share how it was all put together as I would love to know how you did it.

I've posted on other sites but not really done it in order, I'll do a "how I did it" here.

Its not a drop in conversion but it does fit the car physically really well (only the AEB engine fits as the oil pump is at the rear), loads of bits need modding.

The base car was one of my old 2.0 na's that was becoming a parts car basically to keep the other running, so rather than sending it to the scrapper I thought I'd try this as the car is basically a vw/audi which is what the 1.8t is.

The AEB 1.8t block is a evolution of the original mk1 golf gti motor, which is reall important as you need a custom sump, as the mk1 golf has a steel sump it makes fabrication really easy

I could rattle on but I'll start explaing how I abused this poor old porker over the next few days etc

1st job is to sort the belhousing, a broken mk4 gearbox was used, the gear box was cut of leaving just the bellhousing which luckily it has a machined flat surface for a steel plate to bolt to that adapts it to a 944 torque tube.



Worth noting that the starter is in a real bitch of a location, it had to be fitted upside down with a bracket made, which does mean the transmission tunnel needs to be made wider by 1.5 inches, this was the only mod to the body shell
I made a point of making sure any components like starters etc which made need replacing were kept totally standard to make repairs easier

Two years ago I was sat looking at a longitudal Passat 1.8l 20vT and a 924S trying to work this out. I then 'bought' a 951 engine which didnt ever materialise and ended up buying a 944 Turbo.

Excellent work Steve, keep the pictures and details coming!

I always wondered why there weren't more of these. Seems the perfect engine for the 924. I thought the 924 bell housing would have had the same bolt pattern as the 1.8t though (and all VAG's bar the VR6)?

Everyone thinks the 924 was more of a biassed VW project than a Porsche one, with the engine in particular having an interesting Porsche background.

Back when the 924 project was joint venture with VW Porsche were the designer, using some parts from the VW parts bin, but not as much as some people would assume, with the engine being a Porsche design.

Even more interesting is what ended up being the 931 (924 turbo) head originally was destined to be the 924 normally aspirated head, with what was used on the normally aspirated cars originally being the head that the VW version of the 924 would have had.

Which is why the 924 engine has less in common with VW engines, whereas most VW engines share many parts and compatibility of parts.

The bolt pattern doesnt match current engines. Its far from straightforward.

I was taking some of my info from here http://www.944-20v.nl/ where the bellhousing bolted up to the Audi 5 cyl - grant it not all holes matches up but it bolted up - he also used an Audi adapter plate to add 10mm more depth to the bellhousing. The Audi transmission will bolt up to the Audi 5 cyl or 4 cyl - I know that doesn't mean that the 4 will bolt to the 924 bellhousing - I think there are some extra bolt holes on the Audi transmissions so maybe they are there for the differnet 4 cyl pattern?
Only one way to know for sure I guess.

Anyway back to the original poster's thread - I'm impatient to see more have you links to the other sites you posted this build on?

Im familair with the Audi 5cyl conversion and mentioned it in my post before deleting it for clarity. The 924 uses an old VAG pattern but the last engine that was a feasible conversion to share it was the 5cyl 10v/20v.

I should have pursued my own i4 20vT conversion but I chose the wrong fellow to fit it, unfortunately. The final nail in the coffin was the cost to increase the output of the AEB engine from 150bhp to the 250-280-odd bhp that I was looking for, on top of the cost of the conversion, the 924S and the turbocharged Passat.