compression and skimming tolerances

[Guest]

Does anyone know the standard compression ratio for these cars and the skimming tolerances for the head as i got a recond head when i bought th car(look brand new) and has had a skim but i dont no wheather it is skimmed 2 much etc. :?

 

[Guest]

Haynes manual gives the compression at 10.1:1. No idea how much you can skim but the face should be within 0.05mm (again from Haynes).

 

[Guest]

can ususally stand a couple or three skims a head, so long as they dont take loads off!

 

[Guest]

what is that in PSI or BAR pressure as thats what my compression gauge reads. im hoping that the reson for all my power loss is a crap head. maybe thats why the guy got a head recond with all new seals etc!i need some measurements from a standard head to compare with the head i have hear as i dnt want to be bending valves. even then if i find out how much its skimmed i need to no if thats ok. arrrrrrrrrrr!!!! :?

 

[Guest]

you can skim about a mm off, if its skimmed more just alter cam timing to allow less lift @ tdc.

 

[Guest]

Get a thicker head gasket ...

 

[andybond1]

My heads going off for a 3rd skim i think, you should be ok.

 

[Guest]

Get a thicker head gasket ...

WHy would you want to do that? loose power, response and economy from the lost squish.

 

[Guest]

because i dnt want to put it on and get bend valves. what does the original head measure up at?

 

[SEOSearch [Crawler]]

you'll be fine for a fair few skims.

Theres enough valve/piston clearance on a stock engine so i wouldnt worry about that.

besides, they should only be taking a few thou off each time.

 

[Guest]

ojk cheers mate. hopefully i can put my power loss down to the valves so i can regain the power it should be making. got a gauge to test it with wich im gana do early sat mornin n hopfully tell me a few things that i can cure.