symptoms of high compression

[LUV2XLR8]

my 1400 - 1300 engine has high compression.
its 19 bar in each cylinder.
would it be my vernia thats out? timing or blown gasket?

[Adam]

19bar:eek:

Are you sure? :eek:

Thats like 280psi, my comp tester's scale doesn't even go that high lol

[LUV2XLR8]

yep sure, just checked it now :(
what could cause this, timing on the vernia being out, i have a 1300 head on a 1.4 bottom end, useing a 1300 head gasket.
also new piston rings i thought would increase the compression

[Adam]

You should be using a 1400 head gasket.

The compression should be fine with a 1300 head, assuming the heads not been skimmed loads, and assuming the pistons/bore is standard size.

[LUV2XLR8]

pistons and bore are standard, so i should use a 1400 head gasket.
il get on that case.
if i send the head off to be looked at and it needs skimming, how much cannit go before its been skimed too much?

[Philsutton]

19 bar, thats some serious compression

[LUV2XLR8]

yep, heads going off today :(

[Stuart]

man thats barmy! what cam is that with?

DO NOT skim the head!

[Adam]

man thats barmy! what cam is that with?

DO NOT skim the head!
A BP320 i think he said in another thread.

[Stuart]

in that case the timing is miles out/wrong as you should get about 220psi MAX from that..

plus have you bedded in the new rings?

[LUV2XLR8]

rings are new done about 10- 15 miles :S
cam was changed for a standard 1987 1.4 sr cam

il get the head pressure checked as its there, il ring him now tell the fella not to skim it ;)

[craig green]

Throttle butterfly open when testing? Should be.

[Stuart]

id hope the throttle was open for that test... if not then youve got some mega baaad ass compression on the go lol.

[LUV2XLR8]

haha throttle was open ;) got the head back earlia, pressure tested, everythings ok.
going to change gaskets and bolts, sort out timing and hope for the best, must have been the timing out and a possable airlock