Compression test results...can it be too high? - TriStateTuners.com :: Home of Tristate Auto Enthusiast

CleanNeon98 · 05-05-2008, 08:07 PM

So today me and Keeper1434 (i missed the numbers) did a compression test on my engine. All of the cylinders came out within 5psi of each other which I am happy about (cause ive been drving hard i thought there were some problems possible) but I checked online to see the compression that its supposed to have a saw 135psi. All of my cylinders checked out between 195 and 200

Is something wrong here?? Maybe the gauge is inaccurate, and several people told me as long as all cylinders are the same I shouldnt worry, but I just want to make sure.

SovXietday · 05-05-2008, 08:10 PM

Take the numbers lightly, it's more important that they are within 5% of each other.

CleanNeon98 · 05-05-2008, 08:18 PM

^^just what i was looking for, thank you!!

Keeper1343 · 05-06-2008, 12:51 AM

you have nothing to worry about man

Spocknasty · 05-06-2008, 01:05 AM

Invisible Turbo!!

Keeper1343 · 05-06-2008, 01:11 AM

thats fast!!!!

james_ls · 05-06-2008, 02:01 AM

It's all that mad-vtak...

...yo...

**TROLL** · 05-06-2008, 03:19 AM

having the numbers be close is most important, but the fact that your numbers are off by so much means something isnt right. its most likely that you dont have the proper specs for your engine, but another possibility would be excessive carbon buildup in the cylinders. i'd guess you're not referencing the right specs though...

MTuning · 05-06-2008, 05:43 AM

is 135psi the minimal maybe?

Evo8kid · 05-06-2008, 08:10 AM

you have a factory freak

pinacup7 · 05-06-2008, 06:16 PM

Your numbers are high because you cranked the car over way too many times. If you didnt have blow-by before Im sure you do now

**TROLL** · 05-06-2008, 06:18 PM

i dont think the compression will continue to rise if you crank it over too much... i've never kept going, but it sure seems to level off after a few cranks.

Kevin · 05-06-2008, 06:23 PM

Quote:

Originally Posted by TROLL

i dont think the compression will continue to rise if you crank it over too much... i've never kept going, but it sure seems to level off after a few cranks.

+2352

Maybe bad gauge?

dragonfly2k3 · 05-06-2008, 06:23 PM

Quote:

Originally Posted by pinacup7

Your numbers are high because you cranked the car over way too many times. If you didnt have blow-by before Im sure you do now

hate to say it, but if you honestly believe that cylinder pressures are under 200psi on the combustion stroke you may/may not be retarded. Cranking it over until it maxes out might not be as accurate but it is much easier for a novice to interpret those numbers. They wont show minor cylinder wear, but they will deffinately show any major problem.

Keeper1343 · 05-06-2008, 06:42 PM

it could have went higher... I tried keeping the cranking consistent.

Keeper1343 · 05-06-2008, 06:44 PM

Quote:

Originally Posted by pinacup7

Your numbers are high because you cranked the car over way too many times. If you didnt have blow-by before Im sure you do now

not dissing you in anyway but how could it produce blow by??? most of the pressure would just exit the valves right???

pinacup7 · 05-06-2008, 07:00 PM

Their would be no scaveging affect in the exhaust. If you really cranked it that much not all of the pressure would escape depending on where your at on the stroke. 200psi isn't going to do anything though. I was always told to crank it 5-6 times and get your reading. Were you guys at least holding the throttle open?

CleanNeon98 · 05-06-2008, 07:13 PM

Quote:

Originally Posted by pinacup7

Their would be no scaveging affect in the exhaust. If you really cranked it that much not all of the pressure would escape depending on where your at on the stroke. 200psi isn't going to do anything though. I was always told to crank it 5-6 times and get your reading. Were you guys at least holding the throttle open?

yes..

noclutch · 05-06-2008, 07:20 PM

Quote:

Originally Posted by pinacup7

Your numbers are high because you cranked the car over way too many times. If you didnt have blow-by before Im sure you do now

Now you're just making stuff up...

CleanNeon98 · 05-06-2008, 07:20 PM

Now that I looked on other sites it says that compression should be 165...and another says 175

here is something from the civic forums

http://www.civicforums.com/forums/36...-good-bad.html

05-05-2008, 08:07 PM	#1
CleanNeon98 TST Ruined My Life! Join Date: Jun 2006 Location: Philadelphia Member #2029 My Ride: "Honey Badger" Turbo Miata iTrader: (8)	Compression test results...can it be too high? So today me and Keeper1434 (i missed the numbers) did a compression test on my engine. All of the cylinders came out within 5psi of each other which I am happy about (cause ive been drving hard i thought there were some problems possible) but I checked online to see the compression that its supposed to have a saw 135psi. All of my cylinders checked out between 195 and 200 Is something wrong here?? Maybe the gauge is inaccurate, and several people told me as long as all cylinders are the same I shouldnt worry, but I just want to make sure. __________________ 2004 MAZDASPEED MX-5 : 328whp / 308wtq / 2500lbs 2012 Toyota Prius 2 : Daily Driver

05-05-2008, 08:18 PM	#3
CleanNeon98 TST Ruined My Life! Join Date: Jun 2006 Location: Philadelphia Member #2029 My Ride: "Honey Badger" Turbo Miata iTrader: (8)	^^just what i was looking for, thank you!! __________________ 2004 MAZDASPEED MX-5 : 328whp / 308wtq / 2500lbs 2012 Toyota Prius 2 : Daily Driver

05-06-2008, 01:05 AM	#5
Spocknasty Meh Join Date: Oct 2005 Member #986 iTrader: (5)	Invisible Turbo!! __________________ formerly CRXed To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. I <3 JSC Speed and Liquid Powder Coats!

05-06-2008, 02:01 AM	#7
james_ls TST Ruined My Life! Join Date: Mar 2006 Location: Warrington Member #1614 My Ride: 1998 Acura Integra LS//VTEC iTrader: (0)	It's all that mad-vtak... ...yo... __________________ *Heller Dope* - When the ** is doper than Hellen Keller; it's Heller Dope To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. BUY MY STUFF!** To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

05-06-2008, 08:10 AM	#10
Evo8kid Tri-State Post Whore Join Date: Mar 2006 Location: Newtown, PA Member #1631 My Ride: contributes towards Global warming iTrader: (0)	you have a factory freak __________________ TurboTagTeam is my crew chief 1996 Nissan 240sx- To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. 2010 Dodge Ram 2500 6.7L Turbo Diesel 2008 Audi RS4- 420 HP 4.2L V8 2004 Honda CBR600RR

05-06-2008, 12:51 AM	#4
Keeper1343 Tri-State Addict Join Date: Sep 2007 Member #5714 My Ride: 99 Honda Prelude... get some. iTrader: (0)	you have nothing to worry about man

05-06-2008, 01:11 AM	#6
Keeper1343 Tri-State Addict Join Date: Sep 2007 Member #5714 My Ride: 99 Honda Prelude... get some. iTrader: (0)	thats fast!!!!

05-06-2008, 05:43 AM	#9
MTuning Tri-State Addict Join Date: Feb 2008 Location: PA Member #7006 My Ride: 04 S2000 iTrader: (2)	is 135psi the minimal maybe?

05-06-2008, 06:16 PM	#11
pinacup7 Tri-State Addict Join Date: Apr 2006 Location: Under a hood Member #1764 My Ride: Baaaaahd GTO iTrader: (0)	Your numbers are high because you cranked the car over way too many times. If you didnt have blow-by before Im sure you do now

05-06-2008, 06:42 PM	#15
Keeper1343 Tri-State Addict Join Date: Sep 2007 Member #5714 My Ride: 99 Honda Prelude... get some. iTrader: (0)	it could have went higher... I tried keeping the cranking consistent.

05-06-2008, 07:00 PM	#17
pinacup7 Tri-State Addict Join Date: Apr 2006 Location: Under a hood Member #1764 My Ride: Baaaaahd GTO iTrader: (0)	Their would be no scaveging affect in the exhaust. If you really cranked it that much not all of the pressure would escape depending on where your at on the stroke. 200psi isn't going to do anything though. I was always told to crank it 5-6 times and get your reading. Were you guys at least holding the throttle open?

05-06-2008, 07:20 PM	#20
CleanNeon98 TST Ruined My Life! Join Date: Jun 2006 Location: Philadelphia Member #2029 My Ride: "Honey Badger" Turbo Miata iTrader: (8)	Now that I looked on other sites it says that compression should be 165...and another says 175 here is something from the civic forums http://www.civicforums.com/forums/36...-good-bad.html __________________ 2004 MAZDASPEED MX-5 : 328whp / 308wtq / 2500lbs 2012 Toyota Prius 2 : Daily Driver Last edited by CleanNeon98; 05-06-2008 at 07:23 PM.

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