compression readings ?

muttsnutts89 · 07-02-2010, 09:49 PM

hi what sort of compression figure should i have from my 89 erst 1600cvh ? a figure for a bad engine compared to say a good rebuilt one thanks.

If you were logged in, you wouldn't be seeing this ad!
Register your free account today, or log in if you already have an account.

JesseT · 08-02-2010, 06:11 AM

Equal! That is of primary importance. The value is secondary and can easily be affected by settings, such as cam timing.
On a standard engine, I'd say that the compression reading in bars should be higher than the compression ratio. On wild cams these tend to be on the same level.

rickbartlett · 08-02-2010, 07:21 AM

i good one should be 150 psi in each cylinder

muttsnutts89 · 08-02-2010, 08:05 PM

the reason i ask is just done a egine rebuild on my rs. new rings, re seat valves and head skim, big and main bearings full gasket set ect.. it also has got a kent cam cvh 35 and all running great and checked the compression and i have 8.5 bar (125psi) on all clinders does this sound a little low ?? .................... regards ryan

JesseT · 09-02-2010, 06:07 AM

You will not get much higher on a CVH35. All is ok.

rickbartlett · 09-02-2010, 07:24 AM

seems a little low to me

tabetha · 09-02-2010, 10:13 AM

If it's a very new engine give it some time to bed the rings in properly, don't worry about the comp, just as said so long as nice and even.
tabetha

08-02-2010, 06:11 AM	#2
JesseT PassionFord Post Troll Trader Score: (0) Join Date: Jun 2003 Location: Finland Posts: 2,721	Equal! That is of primary importance. The value is secondary and can easily be affected by settings, such as cam timing. On a standard engine, I'd say that the compression reading in bars should be higher than the compression ratio. On wild cams these tend to be on the same level. __________________ Orion tic & Escort tic & 2xFocus

08-02-2010, 07:21 AM	#3
rickbartlett ford mad!!! Trader Score: (0) Join Date: May 2008 Location: banbury,oxfordshire Posts: 2,267	i good one should be 150 psi in each cylinder __________________ Jamsport 01604 755529 S2 IN SIG NOW SOLD AND WROTE OFF SWAPPED SEV FOR ,BLACK RS TURBO CABRIOLET H443HOO ON 4X4 COSSIE RIMS

09-02-2010, 06:07 AM	#5
JesseT PassionFord Post Troll Trader Score: (0) Join Date: Jun 2003 Location: Finland Posts: 2,721	You will not get much higher on a CVH35. All is ok. __________________ Orion tic & Escort tic & 2xFocus

09-02-2010, 07:24 AM	#6
rickbartlett ford mad!!! Trader Score: (0) Join Date: May 2008 Location: banbury,oxfordshire Posts: 2,267	seems a little low to me __________________ Jamsport 01604 755529 S2 IN SIG NOW SOLD AND WROTE OFF SWAPPED SEV FOR ,BLACK RS TURBO CABRIOLET H443HOO ON 4X4 COSSIE RIMS

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

08-02-2010, 08:05 PM	#4
muttsnutts89 15000 Trader Score: (0) Join Date: Dec 2009 Location: somerset Posts: 26	the reason i ask is just done a egine rebuild on my rs. new rings, re seat valves and head skim, big and main bearings full gasket set ect.. it also has got a kent cam cvh 35 and all running great and checked the compression and i have 8.5 bar (125psi) on all clinders does this sound a little low ?? .................... regards ryan

09-02-2010, 10:13 AM	#7
tabetha 15K+ Super Poster!! Trader Score: (0) Join Date: Jul 2006 Location: uk Posts: 17,203	If it's a very new engine give it some time to bed the rings in properly, don't worry about the comp, just as said so long as nice and even. tabetha