I have a rare euro 4 port head for sale if anyone is interested PM me a message
as Im now focused on a motorike headed ca20e build will freight depo to depo
These are the all out performance CA head that never came to Australia and similar to a big 4age setup or 4g63 from nissan or a Nissan Cosworth / Cossie head you will notice ports are not as wide as the 8 port so if you open up the 8 port it will be too wide for ideal flow as the 4 ports are already huge.
4 port height is about 45mm and width about 56mm.
Also have inlet flange area was going to make custom inlet manifold.

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Om nom nom nom! I assume it comes with injector rail and 4 port bottom part of the inlet manifold which had no butterflies???? Contact mcdat cause I know he was chasing one :) these heads are awesome :) I have one so I can rate it ;)

Hi Bailz i have already spoke to D,i was going to buy it but decided to give it a miss,its cheaper to get an 8 port converted into a 4 port.Im not putting #OOPS# on D or undermining his knowledge but Ariel from custom plenum creation said that he has tested this conversion on his flow bench and said that it flows better that the euro 4 port.

Well that sounds like a big hole in D's "for sale sign" May aswell throw in their phone number while ya at it.

Costs a lot more to convert an 8 port to flow better than a 4 port.... Plus you still have butterflies on an 8 port which also have to be welded up.... And make custom gaskets blah blah blah... Bang for buck.... 4 port all the way :)

Hi Bailz its only costing me 500 to do this,oh plus 1400 for the costum plenum.

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McDat in this case you are getting personal business jargon, the wider the port the worse the flow as the air charge needs to be kept tightly into the centre of the bores with minimum fuel coating the bore walls as it goes in and tumbles. The less the charge has to deviate before it goes through the valves the better, look at any Honda ports for reference its all about good tumble.

The CADET 4 port heads are like SR20DE, EVO 4g63 and Honda Ports, the opened up 8 port to 4 port conversion has horrible dividers as they create more turbulence than properly tapered more smoothly tapered and further inset dividers. Look up Ninja or Hayabusa turbo threads on how turbo people shape this divider on already fantastic factory ports.

Look at any performance modern 4 valve head engine they avoid going wide instead go narrow and tall. The bigger the ports is not the solution, the 8 to 4 port conversion makes them way too big. The 4 port is just right but almost overboard itself. Mine is comparable to 4g63 in size and slightly bigger than most Honda performance heads. 1 persons flow bench and business means squat compared to Japanese engineering. In Germany folks term them Autobarn versio of the CADET. Also the 4 port roof can be raised higher again they have more meat all round.

Wide ports will never flow better than taller ports even latest bike engines go round and Honda has stuck with 45 degree valve angles for a long time with the same port shape as the cadet 4 port.

EDIT: SOLD

This nicer tidier soother inlet for halve the price would work very well.
http://www.ebay.com/itm/INTAKE-MANIFO ... sh=item27cf8cc409&vxp=mtr

SR20de (top) vs later SR20Ve (bottom)
you see the shape of the ports on perhaps the most successful late nissan engine? for the VE they went even narrower.

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These is what I had planned for porting mine with knife edged / tapered dividers
compare this to the bodgy dividers on the 8 port butchery

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