VR6 Head Work

[pattso187]

Hi Guys,

I've gotta rip my head off my 95 vr6 cause the gaskets blown. Just wondering if anyone can recommend somewhere good in Sydney or Canberra to have it ported and lightly machined while its off. I plan on going 42mm intake and 36mm exhaust valves and just cleaning up the bowl and putting in heavy duty valve springs than later on throwing in a set of 268's with a chip. Anyone think these valves will be too big? Haven't got oo much experience playing with VR's.

Thanks,
Patrick.

[The_Hawk]

I will have to wait for the experts to come along with real advice, but I would be *very* interested in seeing a dyno sheet and a summary of the costs when it's all done. Would be interesting to see what the humble VR is capable of at what cost.

[Preen59]

My personal opinion is that it's pretty poor bang for buck. If you want to do it because you want to do it then that's cool but those heads flow soooooo poorly NA. It's the reason why nearly everyone goes for a blower or a turbo when looking for performance.

You'll only get moderate power gains, but you will get gains.

For really detailed info and for a good place to get some work done, contact Bug_Racer (Seb) from Euro Automotive. He's probably your best bet. He loves the bloody things haha.

[Golf Loon]

You can get some good gains from NA head flowing on a VR6.

Depends on your budget and whether you want it finished this century as to where youd take it I reckon.

I know an American bloke that can flow one pretty well for you.

You do realize the work involved in taking off the head of a VR6 and that the engine and gearbox need to come out and into lots of pieces right??

[pattso187]

Hi Everyone,

I'm not expecting any huge gains just hoping to get somewhere near 200hp at the wheels once the cams are done and i put on a better exhaust and inlet manifold. Who is this American guy you speak of golf loon? Do you have a contact number or email you could pm me? Thanks. I'm well aware of whats involved with pulling off the head. Although as far as i'm aware the gearbox doesn't need to come out unless you wanna change the chains and guides which i'll do once the clutch is due.

I'll keep you posted. My main concern was that the valves may be too large. has anyone here had a good play on a flow bench with one of these heads?

Thanks,
Patrick.

[Golf Loon]

How are you gonna take the head off without taking off the chains??
A Vr6 is a unique motor.
Call me at work and I can give you some options if you like.

[pattso187]

You dont need to srip down the flywheel end of the motor you simply remove the cam gears from the cams and strap the chains up tight with some good nylon string so the chain cannot drop off the bottom gears. Bit figity but beats pulling the box out. Have you had the head off a VR before?
Patrick.

[VW Convert]

Have you had the head off a VR before?
Patrick.

That's a fairly audacious question from someone with a total of 5 posts on this forum to a respected member who has countless years of experience repairing and rebuilding VWs.

You have entered this forum and asked questions about a specific topic and in doing so indicated you have limited knowledge of the topic. You have been offered advice from an expert in this field, perhaps you should reconsider that question.

Cheers

George

[Tim]

That's a fairly audacious question from someone with a total of 5 posts on this forum to a respected member who has countless years of experience repairing and rebuilding VWs.

You have entered this forum and asked questions about a specific topic and in doing so indicated you have limited knowledge of the topic. You have been offered advice from an expert in this field, perhaps you should reconsider that question.

Cheers

George

Actually dont shoot the guy down so harshly. Ive read a few builds with people carefully taking care that the chains dont come loose and leaving the gearbox in. So it is possible.. But you'd wanna get it right.

[VW Convert]

Actually dont shoot the guy down so harshly. Ive read a few builds with people carefully taking care that the chains dont come loose and leaving the gearbox in. So it is possible.. But you'd wanna get it right.

I didn't intend to shoot the guy down, simply making the point that the question was out of line in light of Golf Loons experience vis a vis the limited experience expressed by the OP.

I don't doubt that it may be possible to remove the head and support the timing chain, I recall doing something similar with my Datsun 1600 half a lifetime ago using a piece of timber as a wedge to hold the chain and Golf Loon did offer the OP to call him and he would "give him some options".

No big deal really.

Cheers

George

[JVLR32]

Hi Guys,

I've gotta rip my head off my 95 vr6 cause the gaskets blown. Just wondering if anyone can recommend somewhere good in Sydney or Canberra to have it ported and lightly machined while its off. I plan on going 42mm intake and 36mm exhaust valves and just cleaning up the bowl and putting in heavy duty valve springs than later on throwing in a set of 268's with a chip. Anyone think these valves will be too big? Haven't got oo much experience playing with VR's.

Thanks,
Patrick.

M8 i reckon goodman race engines....He has just got all the lateset programing from the states.

[Bug_racer]

That's a fairly audacious question from someone with a total of 5 posts on this forum to a respected member who has countless years of experience repairing and rebuilding VWs.

You have entered this forum and asked questions about a specific topic and in doing so indicated you have limited knowledge of the topic. You have been offered advice from an expert in this field, perhaps you should reconsider that question.

Cheers

George

If you read loons post it suggests you have to remove the gearbox to do the head which you dont . Ive removed a head before without pulling the box out . If you like do a search on HPA turbo conversion and you'll see pictures of how they pull the head off and fit a headspacer without removing the gearbox .

This thread has so little useful information . Take the head here or take it there . Very few people have any real experience with these engines in this country . Porting the head and getting the right flow figures is crucial with the different runner lengths . Porting is useless without a decent cam (268 or larger) . You also cant just machine the head , there is no combustion chamber in the head on a 12V :



if you want to machine the head you'll need to pull the valves out and probably redo the inserts . To raise compression ratio you can either run a mk4 headgasket or change the pistons .
The only advice I can give you is take it to someone thats done one with proven gains . You'll need a chip as well as sorting out your fueling issues .

[Jmac]

Ive never removed the trans to do a head, you only would if you were going to do the chains and guides, and even then the time you spend messing around with the box i would have the whole lot swung out the front, unbolt the front off the car and pull it all forward, makes for a better job instead of leaning over an engine bay.
Jmac

[schoona]

If you read loons post it suggests you have to remove the gearbox to do the head which you dont . Ive removed a head before without pulling the box out . If you like do a search on HPA turbo conversion and you'll see pictures of how they pull the head off and fit a headspacer without removing the gearbox .

This thread has so little useful information . Take the head here or take it there . Very few people have any real experience with these engines in this country . Porting the head and getting the right flow figures is crucial with the different runner lengths . Porting is useless without a decent cam (268 or larger) . You also cant just machine the head , there is no combustion chamber in the head on a 12V :



if you want to machine the head you'll need to pull the valves out and probably redo the inserts . To raise compression ratio you can either run a mk4 headgasket or change the pistons .
The only advice I can give you is take it to someone thats done one with proven gains . You'll need a chip as well as sorting out your fueling issues .

Good info Sebby

[pattso187]

Hi Guys,

Thanks for the info Seb. I didn't want to machine the head to gain compression. just simply to clean it up if need be. Also i will be sourcing a mk4 gasket from the states. As for George, I've been a mechanic for audi for 7 years now so i guess i have a little experience in he field. I wasn't having a stab at golf loon, simply asking the question because as a mechanic it sounds insane to me to pull the gearbox out unless you need to replace the chains and guides. Should he have stated that the chains should be replaced due to the extra valve train stress than i would understand but as far as pulling the gearbox out just for fun it doesn't particuarly make sense. I'll try contact goodman race engines tomorrow. As Seb stated it would be best to find someone with experience and proof of gains which i was hoping to find not an argument about how to pull the head off.
Thanks for the info and contacts Seb & JVLR32.
I'll keep you posted.
Patrick.