head/cam identification?

[Ant@BackyardRacing]

hi all, ive just replaced the cylinder head, and cambelt with all tensioners/idlers etc on my ph1 172 (i bought the car with snapped belt). all is well, car is running fine, im a little worried though that the 2nd hand head/cams i bought maybe from a megane/laguna, and not a 172, the original head i took off looked quite clean, and the one i have fitted look very old to be honest, i cant believe its off a post 2000 car. furthermore the cams had some numbers on them, my original ones start 287 (is this degrees? seems aggressive if so) and the ones in the 2nd hand head start 267 i think? There must be a number on the head im guessing somewhere, and if i assume that the cams are the original ones from that head i will have my answer

sorry for the novel!

cheers, ant

 

[Andrew Cooke]

I think only the sport heads have the ports CNC'd (?)

 

[sideways danny]

the numbers on the cams are not duration. There's a few different part numbers of cams fitted thorugh the years, (minor differences to look at) but all the same essentially

ph1 had CNC'd inlet ports and large exhaust ports, ph2 172 and 182 had smaller squarer exhaust ports and more CNC'd inlets. There's differences in the rocker cover between 172 and 182 also

 

[Ant@BackyardRacing]

i dont think its a 182, or 172 head, this is my point. i think its just a laguna/meg head.

it does have cnc`d inlet though, so if megs/lagunas do not, then i suppose im good

but back to my question, does noone simply have a part number cast into the head that would confirm?

 

[Ant@BackyardRacing]

I think only the sport heads have the ports CNC'd (?)

fancy seeing you here mr cooke

 

[Andrew Cooke]

fancy seeing you here mr cooke

I've been looking into wax

If you're concerned about the cam I imagine you can measure the lobe lift of the inlet cam through the oil filler. I'll have a sport cam sat on the floor in a bit so can tell you what it should be.

 

[sideways danny]

there might be a sticker on the cambelt end

730 is ph1
736 is ph2
738 is 182

take some pics tbh. If it has CNC inlets it's off a sport regardless

 

[Ant@BackyardRacing]

i thought the 730/736/738 was the engine code, not specifically the head?

i guess i will just take the fact it has cnc ports to be confirmation its not a meg/lag head



i`ll just run it down the strip next time im out with the honda, its it cracks 93mph or so, i`ll be happy its 172 ish

 

[Ant@BackyardRacing]

I've been looking into wax

If you're concerned about the cam I imagine you can measure the lobe lift of the inlet cam through the oil filler. I'll have a sport cam sat on the floor in a bit so can tell you what it should be.

i could just send you the cam/s to run through your new "rig"

 

[sideways danny]

i thought the 730/736/738 was the engine code, not specifically the head?

i guess i will just take the fact it has cnc ports to be confirmation its not a meg/lag head

the head is the primary difference between each

 

[Craig.]

Which is the better head ph1 or ph2 & 182 ?

 

[sideways danny]

I'd choose the ph1 because of the exhaust ports if presented with a choice. As standard it makes minimal difference, but on a hi output build or even with moderate tuning you see a few bhp extra