All about my heavily modified m20 head.

[Jordan]

The kit comes with long shenks to attach the cartridge rolls to etc, normal diegrinder is just fine.

[JJGBMW323]

Looking good

Jordan

The new head looks terrific. Props.

Questions:
1) What headers are those and are they Jet hot coated.
2) Did you port match the intake manifold?
3) thoughts on stainless Plus 1 valves, and high performance valve springs..
are these bling or are they required for a rebuild.

[Jordan]

Jordan

The new head looks terrific. Props.

Questions:
1) What headers are those and are they Jet hot coated.
2) Did you port match the intake manifold?
3) thoughts on stainless Plus 1 valves, and high performance valve springs..
are these bling or are they required for a rebuild.

1) Bavarian Autosport, ceramic coated.
2) Yes, both the manifold and head intake ports were enlarged beyond the stock gasket size. Gaskets were also englarged to match

3) No real gains to be had there.

[madjurgen]

Dyno! Dyno! Dyno!

[fporro]

goos stuff there Jordan, your workmanship never cease to amaze me.

[E30_pilot]

wow looks so hot. How much is the cost for modding the head? Because
i cant decide to i rebuilt my m20 and mod the m20 head or go
and do a m50 swap.

[Jordan]

It cost me $40 to fully port/polish the head.
$300 or so for the 5 angle valve grind, recon valves, new guides, and resurfacing.

I had all the internals from my current head and just swapped them.

[Sean]

Sorry, that information is unavailable.

Aww, Jordan, why's the information unavailable on how you're doing the oil seperation? i was wondering the same! :)

[mcgrath]

Aww, Jordan, why's the information unavailable on how you're doing the oil seperation? i was wondering the same! :)

Agreed. You have shared very much information in the past. Why not let us know what your setup is for the oil seperation? pllllleeeeaaaaassssseeeee :)

[m3jasper]

That head looks pretty good, but I think it has some flaws. Hope you get good results after the tune. Best of luck with it.:)

-Dave

[m3jasper]

Nando, snapped a quick pic for you. Its rather dark, but you'll get the idea.

http://jordan.lodac.com/Images/CC.jpg

Also, here is a stock 885 chamber to compare:
http://jordan.lodac.com/Images/CCREF.jpg

just out of curiousity, what do you actually expect to seal this with RTV?

-Dave

[Jordan]

What exactly is your point, other then ignorantly trying to stir up shit?

There is no problem in the picture at all. What you are seeing is where the polishing wheel rode up over the edge of the chamber. All of the chamber is well within the sealing surface of the edge of the headgasket.

Its been sealed quite well for over a month now and the engine runs much stronger then it ever has.

That picture is also before I had the machine shop resurface the sealing surface of the head. Only an idiot would carry out such machine work prior to doing such extensive porting and modification to the head.

[e30rapidic]

The black smoke coming out of your exhaust IS unburned fuel. By smoothing everything out like you did has taken the ability for the fuel and air to atomize effieciently. I will bet that you have raw fuel running down the inside of the intake ports and not being burned properly in the head. Also, I say you'll be chaging that head gasketout soon enough due to the nicks around the combustion chambers.

I build 400 - 700 horsepower NA small block chevys and know what works and what is worthless. You have some nice stuff but its redundant on an M20. A 5 angle valve job is no better than a 3 angle valve job in these motors. I have been tweaking on a few of my own M20's since I bought my cabrio new back in 1987.

[Jordan]

The black smoke coming out of your exhaust IS unburned fuel. By smoothing everything out like you did has taken the ability for the fuel and air to atomize effieciently. I will bet that you have raw fuel running down the inside of the intake ports and not being burned properly in the head.

Your point is? I still haven't gone back in to tune the car again. I've connected the shops LM1 to my car and gone for a couple runs on the highway and have confirmed my A/F ratios are all over the place. I run devilishly rich from 3-5k. After that it more or less OK. Once I get retuned I will be fine. The engine management is still fueling the same as it was for the known airflow values of the old head/exhaust. Until everything is retuned nothing will be optimal.

There isn't a single picture showed in this thread of the finished texture on the intake ports so stop talking like you know what they look like. The plain and simple of it is you don't. All the pictures I have posted here also look very polished when in fact the surface is satin at best.

I say you'll be chaging that head gasketout soon enough due to the nicks around the combustion chambers.

I say... are you stupid? Can you not read well?

That picture is also before I had the machine shop resurface the sealing surface of the head.

The sealing surface is immaculate, and still has enough skimmable thickness for 1-2 more resurfaces if need be.

A 5 angle valve job is no better than a 3 angle valve job in these motors.

When the price is the same it sure as hell cannot hurt. Closer you are to a radious the better.

[mspiegle]

The black smoke coming out of your exhaust IS unburned fuel. By smoothing everything out like you did has taken the ability for the fuel and air to atomize effieciently. I will bet that you have raw fuel running down the inside of the intake ports and not being burned properly in the head. Also, I say you'll be chaging that head gasketout soon enough due to the nicks around the combustion chambers.

I build 400 - 700 horsepower NA small block chevys and know what works and what is worthless. You have some nice stuff but its redundant on an M20. A 5 angle valve job is no better than a 3 angle valve job in these motors. I have been tweaking on a few of my own M20's since I bought my cabrio new back in 1987.

So where's YOUR heavilly modified M20 head? Jordan did a pretty good job at educating us and providing some useful information. Where's your useful information?