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.

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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 Garage is empty, add now Trader Score: (0) Join Date: Jun 2003 Location: Finland Posts: 2,859 Rep Power: 11	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 G911 TTA Garage is empty, add now Trader Score: (0) Join Date: May 2008 Location: warwickshire Posts: 2,825 Rep Power: 6	i good one should be 150 psi in each cylinder __________________ Jamsport 01604 755529 S2 IN SIG NOW WROTE OFF NOW DRIVE BMW 328i E36 CONVERTIBLE AND VAUXHALL ZAFIRA GSI TURBO FAMILY WAGON

09-02-2010, 06:07 AM	#5
JesseT PassionFord Post Troll Garage is empty, add now Trader Score: (0) Join Date: Jun 2003 Location: Finland Posts: 2,859 Rep Power: 11	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 G911 TTA Garage is empty, add now Trader Score: (0) Join Date: May 2008 Location: warwickshire Posts: 2,825 Rep Power: 6	seems a little low to me __________________ Jamsport 01604 755529 S2 IN SIG NOW WROTE OFF NOW DRIVE BMW 328i E36 CONVERTIBLE AND VAUXHALL ZAFIRA GSI TURBO FAMILY WAGON

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08-02-2010, 08:05 PM	#4
muttsnutts89 15000 Garage is empty, add now Trader Score: (0) Join Date: Dec 2009 Location: somerset Posts: 32 Rep Power: 0	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 BANNED BANNED Garage is empty, add now Trader Score: (0) Join Date: Jul 2006 Location: uk Posts: 24,646 Rep Power: 0	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

09-02-2010, 10:13 AM
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