Good stuff, I'd like to see this once done! At one time I was thinking of doing the exact same swap. Instead I just bought entire Z6...

 

i have found that the rocker assembly and cam from a z6 will fit perfectly on a z1 head to make it true vtec and if you port the head like the pic you posted and use the z6 rockers and cam that would make a pretty bad ass head it will make like 11.3:1 on stock z6 block

 

thats good to hear! But i whant to keep the vtec-e mode for MPG thats why i am using the z1 head. And the z1 cam has a larger lift then the z6 cam when vtec engages.
i call that engine D16z1:gayfight2:
head complet disassembled and cleaned

 

Getting the extra MPG won't happen unless you have all the extra supporting items...small TB, small IM, 5-wire O2, P07 ecu, etc etc.

 

u arnt gonna get any better mpg with that motor vs a full vtec

 

i beg to differ on what you say about the z1 cam having more lift than the z6 i did som quick measuring of both cams on the z1 with the big intake lobe and the z6 on the secondary lobe(vtec lobe) and found that the z6 has a smaller base circle with at least .020 more lift than the z1

 

Last week I had my z1 head in the Computertomograph to see how the ports are shaped and if there are some cracks. The head is in perfect condition!

Here you can see the slight difference between the swirl (lower in port) and the non swirl port (upper in port)

I'd like to know where can i take some material off to get better flow? bowl etc.
Intake

Outtake

 

received today my head from the welder and started filling up the valve stem area of the intake side.

made some wood sticks to seal the valve guide: 6mm grinded to 5,4mm and wraped with some tape

I used a 2-compound plasticine that resits up to 300°C

before

after

The protruding material will be shaved when the head is getting ported.

 

wow great thread! in for more!!! :awais:

 

News!

Started my port work today, i must admit that its my first port work i've ever done!

My weapon's of choice :hehe:

 

And now some results

Intake side used a 80 grind flaper wheel

Exhaust side

 

did you mirror polish the intake?

if yes

FAIL
NEVER NEVER polish the intake too much.a bit rough surface supports the atomiziation(spell check???)
a too smooth surface ends with fuel drops at the walls :-(

 

No i didn't mirror polish the ports neither the intake nor the exhaust side. I used a 80 grid flaper wheel.

It only looks on the pictures so shiny!

 

ic
nice build

which cr did you have as target?
but EcoVTAK :-D ??

Reading about your car makes me think that you earn a shitload of money
Really Nice Car

 

CR ratio will be at 11,1:1 i know eco-vtec is so :roll: but i what to keep the milage!

Hey my girl left me, so i have to but the money somewhere else!

 

Hey my girl left me, so i have to put the money somewhere else!

lol thats an awesome line


oh and this is a hell of a build you got going, can't wait to see some results!

 

this looks like it has potential ! I have always wondered if the roller rockers in the z1 could be put to any good use. if you ever decide against your economy idea, I say get a custom cam grind and lock vtec all the time !



subscribed.

 

seems like a cool build!

 

What are your plans with the egr system? Intake manifold?

Looks like a promising build. Also, just curious but have you compared the z1 cam to the y5 cam?

 

I'm going to guess Z6 IM and run it on a tuned P28 given the port size.

 

Data sheet Robsters EG VX

block: D16z6 75mm
crank: D16z6 lift_90mm / main_55mm / rod_45mm
rod: D16z6 137mm / 48mm / 19mm
piston: D16z6 75mm / comp height_30mm / Vol. -10,1cc
gasket: D16z6 0.037’’
head: D15z1 Vol.25,3cc / in_V: Ø27,5mm / ex_V: Ø23,5mm mild portwork ex=1081mm² in=z6 mani
manifold: D16z6 stock (or EGR mod when needed)
TB: D16z6 OEM Ø56mm
Inj.: D16z6 OEM 240cc (or z1 190cc has to be tested)
FPR: ITR OEM 3,3 - 3,8 bar
ECU: P07 vtec-e chiped / P28 chiped / P28 Hondata S200
spark: D15z1 NGK ZFR6F-11
Filter: K&N drop in + 76mm aluminium pipe
header: 4-2-1 pairing 1+3 2+4 ØInnen P=39x407mm S=42x205mm Col=47x69mm HyTec style
Kat: 100cpsi in=50mm out=50mm
midpipe: 50mm Supersprint
rear muffler: 55 / 50mm TwinLoop

comp: 11,1:1
r/s ratio: 1,52:1
b/s ratio: 0,83:1

trany: D15z1 1=3.250 / 2=1.761 / 3=1.066 / 4=0.853 / 5=0.702 / F=3.250

 

Wow, pretty much I would have used the same parts.

Which twin loop muffler are you using? I used to use the netami, then upgraded to 2 1/4", but planning on using the twin loop again and dropping back down to 2". I'm sure this includes a beautfiul Vtec-e valve cover aswell haha.

 

Nice build up, what caught my eye however are those cross-section images of your cylinder head. Any details on the equipment used?

 

What details would you like to know?
ComputerTomograph or porting tools?

 

That Computer Tomograph. I'm kind of curious as to how you have access to one.

 

We are having one here at work (development center Weissach .. Porsche)

are you going to do any combustion chamber work?

No the chambers will stay untouched.

 

are you going to do any combustion chamber work?