alloy head
Turbo Mini Forums

hi, i have had a bit if spare time this evening and was browsing ebay, and came across alloy heads from the states. they have a 24cc combustion chamber out of the box. if i was to use one i would like to get some porting, larger valves and some chamber work done - not that i am planning on buying one of these, not at the moment anyway!

i was just wondering what peoples thoughts were on alloy head castings, they suposedly perform better out of the box, and any potential advantages with better head dispersion than cast iron on a fi engine

is anyone else running one?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...em=230620025068

pierce make the alloy 5 port

that looks to be a good price for a built up alloy head, i have emailed to see if they sell the heads bare ready for further machining work, just out of interest really re price.

have a dig through TM history these have cropped up before i am sure of it

Yes i moved to the darkside

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I have one of those, although I got mine from MED. It has 21cc chambers and 35/29 valves:


Very light, you have to be careful not to throw it over your shoulder when you pick it up. Should have better heat transfer than an iron head.

Not ran it in anger yet though.

Marcel has some flow data on his website:
http://www.starchak.ca/tech/8-port.htm

Ports are actually too big, so I guess the flow limits are around the valve seats.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

That is a very nice setup, but why not 7-port when you anyway are going aftermarket??

www.shag.no

Edited by Paul S on 18th Oct, 2012.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Paul what coils are they?

they are chevy LS1 / yukon coils,

On 18th Oct, 2012 Vegard said:

On 18th Oct, 2012 Paul S said:

On 18th Oct, 2012 vegar said:
That is a very nice setup, but why not 7-port when you anyway are going aftermarket??

It's a 5 port development project.

The only reason for buying a five port

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Yes, Yukon coils.

They work at logic level, so no need for high current drivers in the ECU.

EDIT also known as "truck" coils.

Edited by Paul S on 18th Oct, 2012.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

you still got a spare set of these Paul? i might be in the market for some.

I've got 4 sets. 3 of which have been allocated to engines and I was hoping to keep the 4th set as a spare.

Lots on ebay though. Search for d585 or 19005218.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Ok, will do