My 1.6 project,,

[TUFFY]

Yes intake is completely fabbed. I am not sure the down pipes are big enough though. The ID of the inside of the pipes is the same as the widest part of the 1.6 intake ports so when I port the head they port will be round where manifold goes on. Top pipe is 4" and I think the inlet pipe is 2 1/8".

The exhaust is a NA exhaust manifold turned upside down and a plate attached to mount turbo. There is a plate on top of a plate to mount the K26 turbo. If I take the extra plate off I have both T3 and T4 bolt patterns.

I am going to try and see if I can be competitive with the 1.6, if not then I will have to do something different. I want to make smoke though so it won't ever be a gas engine lol.

[745 turbogreasel]

My 6.2 doesn't really spool the Banks turbo till 3-4000 RPM, I don't think its going to help you much.

[TUFFY]

Thats how my 6.2 was also,,

[TUFFY]

Hi,  I had the engine that is in the tractor in the pictures running on a stand last year. All stock probably not great shape engine. I am going to build a different engine for it.

 I did the main spring gov mod and turned fuel screw in until it would want to hang a little when I backed off the throttle. I have another pump that sounded stronger with same mods but leaks fuel from O rings. I am going to fix and use that pump to start with.

With no load the turbo would make only about 6psi if I really wound up the motor. When I cranked on the throttle it would blow a big cloud of black smoke so its getting a fair amount of fuel.

I assume head porting would help spool the turbo better. What about a T3/T4 hybred turbo blowing into the K26-6 Porche 944 turbo? I am thinking the K26 is big enough on the hot side to not restrict flow at higher rpm. Or am I way off on my thinking?

[RabbitJockey]

That could work I think k26-6 has a pretty small turbine housing but I'm not sure on that.  It sounds like a decent setup depending on what t4 you have

[TUFFY]

Can I start out with stock valve springs? Or will they be a problem?

[theman53]

The stock valve springs will be ok until you increase the size of the valve head and have a ton of boost. For instance if you increase the valve diameter by 20% then you run 26psi of boost the spring will have to hold the valve closed and at that point *throwing #s out not doing the math right now* you may be at 10x the ammount of pressure than the stock TD would have been at. That would be trying to blow the valve open and when you would need to have the valve springs upgraded. I and many others have ran high 20s in the psi on stock valves and springs. One guy that used to blow up turbos like crazy used to run 37 or so, but quit doing it as he had a pile of turbos in his garage. So unless you go crazy there shouldn't be a need for an upgraded valve spring. At the point of cutting new seats and getting larger valves your machinist should recommend some options for springs at that time.

[TUFFY]

Sounds good.

Is there a place online I can get the basic rebuild specs for a 1.6? Like bolt torque, bearing clearances and stuff like that.

[theman53]

Bentley manual

[TUFFY]

Thanks,,,

[R.O.R-2.0]

Sounds good.

Is there a place online I can get the basic rebuild specs for a 1.6? Like bolt torque, bearing clearances and stuff like that.

http://www.race.nangreaves.com/golf/index.htm

your welcome...

[TUFFY]

Thanks for the help so far with all my questions.

One more quick question,,, is there enough valve seat in a 1.6 head to cut for 1.9 intake valves? Also are 1.9 intake valves a drop in after taking care of the seats? OK that is two questions sorry lol.

[TUFFY]

Hi,

Is .004" piston clearance to much for what I am doing with this engine? I know its over wear limit spec. Engine don't have piston coolers by the way.

[CrazyAndy]

I'd bore it to the next over size if the specs are out.

As far as 1.9 valve size is concerned, I'd just make it easy on yourself and get a 1.9 head.  The Intake ports flow better than the 1.6 anyway.  Bigger valves would be stretching the limit of the 1.6 head IMHO.

[TUFFY]

I have a solid lifter engine so is it possible to put a 1.9 head on it?