S

stt

Member

• Nov 12, 2008

• #1

Does anyone know if my old 6 cylinder will run ok on unleaded without using an additive or will i suffer with valve seat recession?
Does the head fitted to the rover cars (p5 etc) have any harder valve seats and is it a direct replacement?
Will an LPG conversion also need hardened valve seats or will it be ok on the old head?

Thanks in advance

 

oil dripper

Well-Known Member

• Nov 12, 2008

• #2

yer valve seats am allready hardened,but you,ll need harder exhaust valves

 

S

Sean

Banned

• Nov 12, 2008

• #3

and unless yer doing lots of miles at relatively high speeds your not going to see any regression anyways

 

oil dripper

Well-Known Member

• Nov 12, 2008

• #4

oh,an if ya int gorra weslake head on it try an find one it,ll give ya an extra 20-25 bhp

 

rustyrhinos

Well-Known Member

• Nov 12, 2008

• #5

25 bhp for a head change? Are the originals really that rubbish restrictive then?

 

oil dripper

Well-Known Member

• Nov 12, 2008

• #6

it had summit ta do with a less restrictive airflow,cant remember wot it was thou ,bin that long since i ran a 6 pot

 

S

Sean

Banned

• Nov 12, 2008

• #7

i dont think they had much idea about porting and gas flow back in those days

 

S

stt

Member

• Nov 12, 2008

• #8

how do i tell?

is that a weslake or non weslake?

 

oil dripper

Well-Known Member

• Nov 13, 2008

• #9

dunt look like it,the main difference is the inlet manifold.