Upper and lower inlets

[SRIDENZ]

Just a quickie. I searched but couldn't find a definitive answer.

Are the ph1 and ph2 ones identical and therefore interchangable. I have a cup and I am looking for a spare setof inlets to "match" and wanna know I'm buying the right thing.

Please can some one advise me thanks in advance

 

[SRIDENZ]

7 views and no comment. I'm not doing very well here! Lol

 

[mark123]

There are definitely differences.

Lower are all interchangeable IIRC. You have RS stamped and non stamped. Non stamped being earlier and slightly worse match.

Upper is where the real differences lie. 172 and 182 have different breathing. There may be a difference between 172 ph1 and 172 ph2 I'm not sure...

 

[Sym0n]

Can't use an upper Ph1 on any Ph2. Lowers are fine though.

 

[Tom84]

to be fair i wouldnt bother matching the upper anyway just the lower

 

[Nafoff]

i have spare of both if you want some cheap, just let me know

 

[sideways danny]

to be fair i wouldnt bother matching the upper anyway just the lower

matching the upper to the lower is half of what needs doing, matching the lower to the head is the other half. Lower only isn't the whole job

 

[Sym0n]

to be fair i wouldnt bother matching the upper anyway just the lower

FLOL

 

[Cookson]

matching the upper to the lower is half of what needs doing, matching the lower to the head is the other half. Lower only isn't the whole job

Hows is that actually done then?

Assuming the heads ports are larger than the inlets? or is it a case of head off too and get that done?

 

[SRIDENZ]

Great info lads!!! Top bombing lol

I'll pass on the ones I found. Ph rebone YHPM

 

[Sym0n]

Hows is that actually done then?

Assuming the heads ports are larger than the inlets? or is it a case of head off too and get that done?

Most use the gasket as a template from what I've seen/heard/read.