Head porting

[Disturbed]

I did a search and see nothing about it. Oddly enough I can find a set of cams.

What is the biggest set of valves you can stuff into these heads.

Anyone have a set of ported heads?

What are the Gaines?

[m3ray]

If I am not mistaken the porting on the stock heads is already fairly aggressive. If you go too far you may have some issues due to the Double VANOS. May want to consider talking to VAC Motorsports as they have design a performance cylinder head for the s65.

http://store.vacmotorsports.com/vac-...ads-p1817.aspx

[edwinm3]

Originally Posted by m3ray

If I am not mistaken the porting on the stock heads is already fairly aggressive.

^This

[Dave07997S]

Originally Posted by Disturbed

I did a search and see nothing about it. Oddly enough I can find a set of cams.

What is the biggest set of valves you can stuff into these heads.

Anyone have a set of ported heads?

What are the Gaines?

Probably worth very little on a stock motor.


You go to big bumpsticks, stroker kit along with a stand alone DME these things will make big horsepower.

Dave

[Disturbed]

Originally Posted by Dave07997S

Probably worth very little on a stock motor.


You go to big bumpsticks, stroker kit along with a stand alone DME these things will make big horsepower.

Dave

Big HP is relative. I'm used to big block (1005.8ci or 16.5L) making 2150hp @ 8000rpm all motor.

http://www.popularhotrodding.com/tec...?__federated=1




What do you mean by big power? 600-650bhp?

[pbonsalb]

Originally Posted by Disturbed

Big HP is relative. I'm used to big block (1005.8ci or 16.5L) making 2150hp @ 8000rpm all motor.

http://www.popularhotrodding.com/tec...?__federated=1




What do you mean by big power? 600-650bhp?

This is an M3 forum so I assume we are discussing M3s and power levels relative to them. I have never seen a 16.5L engine installed in place of the 4.0L. Seems to me like it might make the front end a little heavy, which would take away from the handling a bit.

[Disturbed]

Originally Posted by pbonsalb

This is an M3 forum so I assume we are discussing M3s and power levels relative to them. I have never seen a 16.5L engine installed in place of the 4.0L. Seems to me like it might make the front end a little heavy, which would take away from the handling a bit.

We can have some fun with this, why not. What is the demissions and weight of the M3's 4.0L.

That 16.5L is 34"w x 26"H x 32L can't recall what its weight is but aluminum block and heads with Ti rods can't be too much.


But seriously all joking aside, what is big NA hp of the M3?

And again who is the M3's goto person for ported heads and what size valves can be stuffed in? What aftermarket springs, retainers ect are avaliable?

[Toxic 335]

Contact VAC motorsports in Philly.

[JRV]

Originally Posted by Disturbed

We can have some fun with this, why not. What is the demissions and weight of the M3's 4.0L.

That 16.5L is 34"w x 26"H x 32L can't recall what its weight is but aluminum block and heads with Ti rods can't be too much.


But seriously all joking aside, what is big NA hp of the M3?

And again who is the M3's goto person for ported heads and what size valves can be stuffed in? What aftermarket springs, retainers ect are avaliable?

Like 13.5 hp and 4 ft/lbs of torque.

[TMiller]

Originally Posted by Disturbed

We can have some fun with this, why not. What is the demissions and weight of the M3's 4.0L.

That 16.5L is 34"w x 26"H x 32L can't recall what its weight is but aluminum block and heads with Ti rods can't be too much.


But seriously all joking aside, what is big NA hp of the M3?

And again who is the M3's goto person for ported heads and what size valves can be stuffed in? What aftermarket springs, retainers ect are avaliable?

If by "big NA hp" you also mean stroked engines, this is interesting:

http://www.***********.com/content.p...n-for-Stroking

[IMG]

I got the heads on my S65 PnP on the exhaust side and we are putting everything back. We will see what are the gains.

[Disturbed]

Originally Posted by TMiller

If by "big NA hp" you also mean stroked engines, this is interesting:

http://www.***********.com/content.p...n-for-Stroking

Link didn't work for me.

[Disturbed]

Originally Posted by IMG

I got the heads on my S65 PnP on the exhaust side and we are putting everything back. We will see what are the gains.

Did they install larger valves?

Only porting the exhaust side seems odd to me. Why would they do that?

[IMG]

Originally Posted by Disturbed

Did they install larger valves?

Only porting the exhaust side seems odd to me. Why would they do that?

Don't need bigger valves. Bigger valves,more weight. The intake side is perfect the way it is, the exhaust side is the one that needs work plus my motor is LC VT3 .

[Disturbed]

Originally Posted by IMG

Don't need bigger valves. Bigger valves,more weight. The intake side is perfect the way it is, the exhaust side is the one that needs work plus my motor is LC VT3 .

What kind of valves are stock? If it's not hollow Ti with Ti retainers you can go with a bigger valve and not pick up any weight.

Congrats on the SC!

[IMG]

Originally Posted by Disturbed

What kind of valves are stock? If it's not hollow Ti with Ti retainers you can go with a bigger valve and not pick up any weight.

Congrats on the SC!

Not what i meant Sir. But lets see what numbers the car puts down. Put down 709whp last time. Added headers and PnP heads

[pbonsalb]

Originally Posted by Disturbed

We can have some fun with this, why not. What is the demissions and weight of the M3's 4.0L.

That 16.5L is 34"w x 26"H x 32L can't recall what its weight is but aluminum block and heads with Ti rods can't be too much.

The 16.5L crank alone probably equals the M3's engine weight.

Roughly, stock power is 400 rwhp in modded NA form, 600 rwhp in stage 2 centrifugal form, and 700 rwhp with a built motor in stage 3 centrifugal form.

For most people, 600 rwhp would be big power for one of these motors. For the people who have made 600 rwhp, big power probably means 700. For the few who have made 700 rwhp, it probably means 800 rwhp or more. There are a few projects underway to make 800-1000 rwhp. Not sure how far along they are. They are so far beyond my means that I do not follow them closely.

[m3ray]

Originally Posted by pbonsalb

This is an M3 forum so I assume we are discussing M3s and power levels relative to them. I have never seen a 16.5L engine installed in place of the 4.0L. Seems to me like it might make the front end a little heavy, which would take away from the handling a bit.

You think?

16.5L 2000HP, talk about apples and bowling balls.

[m3ray]

Originally Posted by Disturbed

And again who is the M3's goto person for ported heads and what size valves can be stuffed in? What aftermarket springs, retainers ect are avaliable?

All the technical people around here are gone. PencilGeek, TrackRat, Regular guy...they're in the wind. Here is a thread that would have answered all your questions, but it has long since been lobotomized.

http://www.m3post.com/forums/showthread.php?t=396602

That is why I suggested you to contact VAC.

[Disturbed]

Originally Posted by pbonsalb

The 16.5L crank alone probably equals the M3's engine weight.

Roughly, stock power is 400 rwhp in modded NA form, 600 rwhp in stage 2 centrifugal form, and 700 rwhp with a built motor in stage 3 centrifugal form.

For most people, 600 rwhp would be big power for one of these motors. For the people who have made 600 rwhp, big power probably means 700. For the few who have made 700 rwhp, it probably means 800 rwhp or more. There are a few projects underway to make 800-1000 rwhp. Not sure how far along they are. They are so far beyond my means that I do not follow them closely.

Unless the M3 V8 is under 150lbs, your mistaking...I'll assume you where joking. :-) I'm not looking to start any crazy arguments.

600rwhp is just when things start to get fun INHOP :-). Hope to see one of these engines break 1000rwhp. After all a dinky 3.0L I6 can do it, why not a 4.6L V8-TT( and sound better doing it). :-)

I would like to get more technical in this thread.

Does anyone have flow numbers for the stock heads?

What is the stock (and ported) port flow numbers?

What is the stock Valve size?

Stock Valve spring rate?

Stock Valve spring style?

Stock Port size (intake and exhaust)

Are the heads water cooled? If so, how and at what areas does the water flow?

[kawasaki00]

Originally Posted by m3ray

All the technical people around here are gone. PencilGeek, TrackRat, Regular guy...they're in the wind. Here is a thread that would have answered all your questions, but it has long since been lobotomized.

http://www.m3post.com/forums/showthread.php?t=396602

That is why I suggested you to contact VAC.

It is complicated, all I will say

[Disturbed]

Originally Posted by m3ray

All the technical people around here are gone. PencilGeek, TrackRat, Regular guy...they're in the wind. Here is a thread that would have answered all your questions, but it has long since been lobotomized.

http://www.m3post.com/forums/showthread.php?t=396602

That is why I suggested you to contact VAC.

Good thread too bad it went to a dead end. :-(