3.6L and 3.8L Bora 24v conversions

[Dyldo]

wow, haven't even heard of these guys or indeed the conversion before. I knew of the small possibility of sleeving the 2.8L to a 2.9L or maybe even a 3.2 conversion from a normal mk4 R32, but this stuff seems insane.

Are they getting the extra displacement from a longer stroke?

3.6L & 3.8L VR6 24v engine conversions - YouTube

[ffoff]

R36 engine?

[PeDiES]

very unreliable for boost, ive heard of them cracking between bores in high boost applications

[Coralon]

Yeah they will be using the 3.6 from the newer models with the 3.2 head to increase compression. For N/A power this would be a very potent upgrade but would cost a similar amount as a turbo build, although it would likely be more reliable and possibly more fuel efficient unless you decided to go nuts. Taking a 2.8 to 2.9 or a 3.6 to 3.8 would make the bore walls thinner so may not be ideal for a turbo application but thats not the point of doing this kind of conversion

[Manaz]

Yep, 3.6L block, 3.2L head (so they'd be the Mk5 R32 Golf head and the CC/R36 Passat 3.6L block mated together). I guess the 3.2L head must flow better?

[djorkboy]

More info here Audi and Volkswagen VR6 4-Valve Engines

[Coralon]

Yep, 3.6L block, 3.2L head (so they'd be the Mk5 R32 Golf head and the CC/R36 Passat 3.6L block mated together). I guess the 3.2L head must flow better?

Not just flow, compression is increased with smaller cylinder tops giving more bang for your buck. Remember back to the good ol days when you would take a holden 202 black or ford 250 xflow and put 186 or 200 heads on them respectively. This upgrade was good for a fair few ponies and when mated with some porting/polishing/shaving plus a decent carby the end result was sub 2k bonkerness and many a blown tire... oh the memories

[Shadow_Rusty]

Wow, that's old skool talk right there...

Personally never got into the Ford/Holdens...
I put a 2k head on a 4k block in my corolla...

[trickysimon]

Why did I have to see this?
Now I'm tempted to take out a personal loan for a new engine.

[Coralon]

Tell me about it, if the minster for war and peace wouldnt take out a contract on me for doing so I would be down the bank now

[Bug_racer]

Yep, 3.6L block, 3.2L head (so they'd be the Mk5 R32 Golf head and the CC/R36 Passat 3.6L block mated together). I guess the 3.2L head must flow better?

It actually flows worse , but , the bigger engines are all FSI , so unless you plan on doing wiring harness / ecu / fuel pump+rail etc swap its much easier just to use the bottom end to get a bit more capacity .

Also this will only work on 2002 onwards Bora V6 as the 2001 didnt have the proper VVTI and the timing chains/mounting points for the guides on the head are different !

[djorkboy]

It actually flows worse , but , the bigger engines are all FSI , so unless you plan on doing wiring harness / ecu / fuel pump+rail etc swap its much easier just to use the bottom end to get a bit more capacity ...

The engine comes with a reflashed ECU ready to fit. The company claim it is a 100% bolt on job, uses all the original parts except for the ECU that they supply.

I think that is probably another reason they use the 2.8 head in the conversion of a Bora/Jetta and the 3.2 head in the conversion of the R32, the head is identical to what came out of the car so everything bolts back on.

[Coralon]

$7900 + shipping + cams... baby jesus is crying but holy mother of god... for an N/A setup that literally bolts in the results would speak for themselves.

[jvlracing]

2.8 24valve with a 3.2 head skies the limit.....luv the topic

[Dyldo]

baby jesus is crying