Compression Test Results - Focaljet

**focusownerskid** · 04-25-2005, 10:51 AM

Cyl/Comp
1 - 130
2 - 150
3 - 169
4 - 174

Looks like the previous owners 3+ years of a 100 shot(n2o) + my few months of high heat JRSC finally took it's toll.

Good thing I have an extra motor lying around

- Drew

**OmniFocus** · 04-25-2005, 10:56 AM

Well... at least all four still HAVE compression.

**Flofocus** · 04-25-2005, 11:28 AM

Thats what I ended up doing this week-end to....

All good though. Thank god.

End result of car not being able to start was a dirty Pro-M.

**PCP_TwilightZX3** · 04-25-2005, 12:28 PM

whats the compression suppose to be on our cars?

**sprout2287** · 04-25-2005, 12:33 PM

They should be all about the same value. I don't think it matters what the numbers are specifically, as long as they don't vary too much between the cylinders. I think from 100-250 is a good ballpark. When I did mine a while back they were all about 210-212

**Hocky** · 04-25-2005, 12:45 PM

it is not too bad.... if you have another motor laying around, add a 100 shot until it is really gone. ;-)

**BUR_ZX3** · 04-25-2005, 02:00 PM

Compression varies... but the cylinders should be within 3% of each other IIRC

**Hocky** · 04-25-2005, 02:29 PM

Quote:

Compression varies... but the cylinders should be within 3% of each other IIRC

I've always gone by 5%, but yea compression will vary relative to the setup.

**PCP_TwilightZX3** · 04-25-2005, 05:08 PM

actually instead of doing a 100 shot i think you should hook up like a 90lb/hr injector and run

pure oxygen

down 1 1/4 mile pass and see how it runs. that would be sooo fun someday i want to do that

**Hocky** · 04-25-2005, 05:38 PM

Quote:

actually instead of doing a 100 shot i think you should hook up like a 90lb/hr injector and run

pure oxygen

down 1 1/4 mile pass and see how it runs. that would be sooo fun someday i want to do that

I don't think you would make it more than a couple of feet...

**troy1nonly** · 04-25-2005, 05:45 PM

sounds like a recipe for a big engine fire to me...

**Hocky** · 04-25-2005, 05:59 PM

Quote:

sounds like a recipe for a big engine fire to me...

true story.

**starfuryt550** · 07-17-2008, 11:03 AM

Drew,

I need to do a compression test on my focus too...what diameter was teh fitting on the tester you used? Thanks g

Andrei

**focusownerskid** · 07-17-2008, 11:58 AM

Quote:

Originally Posted by starfuryt550

Drew,

I need to do a compression test on my focus too...what diameter was teh fitting on the tester you used? Thanks g

Andrei

Holy hell Andrei.

This thread is darn near four years old

It's the same as the spark plugs.

- Drew

**starfuryt550** · 07-17-2008, 07:59 PM

Haha, yeah. I google's "ford focus compression test" and this was one of the first things to come up!

I didn't even realize it til you said it! I got the tester today though. Let's see what the results are...

**guitarseth** · 07-17-2008, 08:02 PM

lol, I was hoping this wasn't the current car.

**xryz** · 07-17-2008, 09:02 PM

Quote:

Originally Posted by focusownerskid

Cyl/Comp
1 - 130
2 - 150
3 - 169
4 - 174

Looks like the previous owners 3+ years of a 100 shot(n2o) + my few months of high heat JRSC finally took it's toll.

Good thing I have an extra motor lying around

- Drew

are this compression numbers are for stock engines???

**secondechomatt** · 07-17-2008, 11:02 PM

Quote:

Originally Posted by guitarseth

lol, I was hoping this wasn't the current car.

me too! good lord, I'm big, you can't tweak with my heart like that andrei!

**cjmartinyzx3** · 07-17-2008, 11:22 PM

Quote:

Originally Posted by guitarseth

lol, I was hoping this wasn't the current car.

me 3 lol i was like... the only one i know that is JRSCed is moms svt.. but i was pretty sure that never saw a 100 shot

**focusownerskid** · 07-18-2008, 08:02 AM

Hell, I almost thought it myself

Quote:

Originally Posted by xryz

are this compression numbers are for stock engines???

Stock engine? Yes.

Non-stock supporting mods aka cause of bad comp? Yes.

- Drew

04-25-2005, 10:51 AM	#1
focusownerskid Administrator Join Date: Aug 2000 Location: Monroe, MI Posts: 15,481	Compression Test Results Cyl/Comp 1 - 130 2 - 150 3 - 169 4 - 174 Looks like the previous owners 3+ years of a 100 shot(n2o) + my few months of high heat JRSC finally took it's toll. Good thing I have an extra motor lying around - Drew

04-25-2005, 10:56 AM	#2
OmniFocus Moderator Join Date: Jul 2001 Location: Mowin' down the cones. (CA) Posts: 26,272	Re: Compression Test Results Well... at least all four still HAVE compression.

04-25-2005, 11:28 AM	#3
Flofocus Senior TEAM Member Join Date: May 2001 Location: Ottawa-ON-Canada Posts: 1,123	Re: Compression Test Results Thats what I ended up doing this week-end to.... All good though. Thank god. End result of car not being able to start was a dirty Pro-M.

04-25-2005, 12:28 PM	#4
PCP_TwilightZX3 Senior TEAM Member Join Date: Feb 2004 Location: The OC Maryland Posts: 2,344	Re: Compression Test Results whats the compression suppose to be on our cars?

04-25-2005, 12:33 PM	#5
sprout2287 Senior TEAM Member Join Date: Jul 2001 Location: Pittsburgh, PA Posts: 1,839	Re: Compression Test Results They should be all about the same value. I don't think it matters what the numbers are specifically, as long as they don't vary too much between the cylinders. I think from 100-250 is a good ballpark. When I did mine a while back they were all about 210-212

04-25-2005, 12:45 PM	#6
Hocky Dyno Queen Join Date: Oct 2003 Location: Indianapolis Posts: 6,769	Re: Compression Test Results it is not too bad.... if you have another motor laying around, add a 100 shot until it is really gone. ;-)

04-25-2005, 02:00 PM	#7
BUR_ZX3 [FJ] Addict Join Date: Apr 2002 Location: Little Saint Clara, Isle of Queen Califia Posts: 35,744	Re: Compression Test Results Compression varies... but the cylinders should be within 3% of each other IIRC

04-25-2005, 05:08 PM	#9
PCP_TwilightZX3 Senior TEAM Member Join Date: Feb 2004 Location: The OC Maryland Posts: 2,344	Re: Compression Test Results actually instead of doing a 100 shot i think you should hook up like a 90lb/hr injector and run pure oxygen down 1 1/4 mile pass and see how it runs. that would be sooo fun someday i want to do that

04-25-2005, 05:45 PM	#11
troy1nonly Senior TEAM Member Join Date: Feb 2003 Location: Phoenix, AZ Posts: 1,453	Re: Compression Test Results sounds like a recipe for a big engine fire to me...

07-17-2008, 11:03 AM	#13
starfuryt550 TEAM Member Join Date: Feb 2007 Location: Michigan Posts: 292	Re: Compression Test Results Drew, I need to do a compression test on my focus too...what diameter was teh fitting on the tester you used? Thanks g Andrei

07-17-2008, 07:59 PM	#15
starfuryt550 TEAM Member Join Date: Feb 2007 Location: Michigan Posts: 292	Re: Compression Test Results Haha, yeah. I google's "ford focus compression test" and this was one of the first things to come up! I didn't even realize it til you said it! I got the tester today though. Let's see what the results are...

07-17-2008, 08:02 PM	#16
guitarseth Senior TEAM Member Join Date: Mar 2002 Location: Wooster, OH Posts: 3,019	Re: Compression Test Results lol, I was hoping this wasn't the current car. __________________ French Blue 2003 ZX3 Power Premium MTX Mild Naturally Aspirated build - Modded for driving enjoyment My Car Please help me with my engine build, buy my engine parts.

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