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VAG Powerplants

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VAG Powerplants

Post by boost panda on Tue Nov 02, 2010 4:51 am

Hey guys,

just some brief musings. I've been looking recently at the engines that VAG produce, from the 4/6-cyl engines we know and love to the TSI/FSI/TFSI's of the Mk5(?) Golf generation, and also to the R32 (which we are becoming more acquainted with) and beyond.

I'm really looking at the engines in the S and RS lines by Audi. You'll probably recognise some of the engines, although there are some I haven't seen covered much like the 2.7 V6 twin turbo of the S4 and later variations in the A6 etc.

Also looking at the 4.2l V8 that we know in the R8 but also in the S4 and the S8. I'm sure there are other chassis engine combos too.

Mikkijayne seems to be the only person to be looking into these as potential powerplants. I guess the purists will keep away, and others too perhaps due to complexity? So many electronics in engines these days, and most of Audis are hooked up to Quattro anyways and the good old CANBUS.

Some of you may know, but coming from a Mk2 Golf CL badged 16v (the 4-branch gurgled so well!) to the gorgeous chassis of the Corrado with the same engine has left me massively underwhelmed. The fact that I paid peanuts for mine also has inherent issues, which I knew when I bought it. I prefer swapping parts to plating panels. I just think it needs so much more power (could handle so much more power) and it would be nice, even as a pipe dream, to just get lost in engineering creativity for a while Very Happy

Jon.
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Re: VAG Powerplants

Post by kevhaywire on Tue Nov 09, 2010 8:58 am

2.7 Biturbo has been done in a Corrado before Very Happy Do it!

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Re: VAG Powerplants

Post by boost panda on Tue Nov 09, 2010 12:06 pm

I wanna see.... Neutral
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Re: VAG Powerplants

Post by CorradoVR6-Turbo on Thu Nov 25, 2010 11:06 am

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Re: VAG Powerplants

Post by mrbeige on Thu Nov 25, 2010 11:34 am

Awesome, just a pity it's funk ugly!

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Re: VAG Powerplants

Post by boost panda on Thu Nov 25, 2010 12:54 pm

I never understood odd engine sizes. Why 2.7?

And yeah, I don't like the styling at all.
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Re: VAG Powerplants

Post by kevhaywire on Tue Nov 30, 2010 8:07 am

Packaging, emissions, insurance, CO taxes, corporate heirarchy (not wanting to upstage their more powerful models) and so on. There isn't one simple answer I'm afraid!

Kind of weird for badging though, huh? The buying public are used to 2.0, 1.8, 2.5, 3.0 and so on, so 2.7 is indeed a peculiar capacity.

Personally speaking, if I was an engine designer I would just design the motor as over square and not worry about the capacity.

Something like 90mm x 90mm = 572.56cc x 6 = 3435cc, or 3.4L.

But to keep up with the Jones's it'd have to be a 3.5, which would mean ruining an otherwise ideal (good torque to revving compromise) bore / stroke layout.

T'is all a load schitt how the marketing and accountant folk always get the final word.

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Re: VAG Powerplants

Post by boost panda on Tue Nov 30, 2010 9:58 am

Yeah, seems like the engineers tell them the specs etc and they go "but THIS will help sellit more" and their non-engineering brains go off on one.

i am a bit of an engineering nazi tbh.
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Re: VAG Powerplants

Post by boost panda on Tue Nov 30, 2010 10:03 am

Just discovered the R36. Never really heard about this much.

Is it the sto-gap between the R32 and the V8s or Audi S/RS models?
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Re: VAG Powerplants

Post by kevhaywire on Wed Dec 01, 2010 6:49 am

Yeah they needed something to lug the lardy Passat around that wasn't diesel or a W8 or W12. Obviously they couldn't just use a common or garden Golf engine, so enlarged it to 3.6 litres. Well, I say enlaraged.... it's a lot more than that. It's an entire new block and head.


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Re: VAG Powerplants

Post by boost panda on Wed Dec 01, 2010 5:07 pm

Ah cool. Someone at uni told me the R32 is a narrow angle V just like the 2.9. I had no idea! I thought that was a new design as well! Laughing
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Re: VAG Powerplants

Post by kevhaywire on Thu Dec 02, 2010 6:29 am

The V5, 12V VR6 and 24V VR6 (inc R32) are all 15 deg narrow angle V6s.

The R36 is 10.5 degrees between banks. Something to do with reducing conrod side loadings apparently. According to Wiki, it was made for the North American Passat, which figures because VW only do anything new to please their biggest market - America.

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Re: VAG Powerplants

Post by boost panda on Thu Dec 02, 2010 3:53 pm

wow 10.5 degrees. That's kinda odd. Interesting about the conrods though.
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