Tuner is asking me what compression I am using.

Ryan314 · 04-24-2010, 05:40 PM

Doing a usual brand new EJ257 short block with 2.0 heads, using STi head gaskets. Tuner is asking me what compression I am using. Sorry if this sounds newb, but is he asking for my compression test numbers on all 4 cylinders? This is first time around on this stuff, help me out!

* Registered users of the site do not see these ads.

modaddict · 04-24-2010, 05:44 PM

compression test or compression ratio?

Are you using stock pistons?

If he needs compression test numbers then...........you need to do a compression test. Not sure why he needs these unless he wants to verify your engine is in good working order.

If he wasnts compression ratio..........we need to know which pistons you're using. I can understand why he wasnts to know this.

2006whitesti · 04-24-2010, 05:46 PM

He is wanting you to do a compression test it sounds like. You are going to need one of these...

http://www.sears.com/shc/s/p_10153_1...0070921x00003a

And doing this on our cars is a real pita, because of the position of the engine/body.

And like modaddict said above, I really don't understand why he would want this. Compression ratio makes more sense.

Ryan314 · 04-24-2010, 06:16 PM

I've got a compression tester, that's not an issue. If that's what he needs it's no issue. I emailed him again to clarify. What's going on is my tuner isn't local, so he's gonna send me a base map to break-in my new block until I can get down to him for a complete road tune.

Yes, I'm using the stock EJ257 pistons, so what would my compression ratio be?

dr3w · 04-24-2010, 06:27 PM

He wants to know your compression ratio I guarantee you it, he couldn't care less about your cylinder compression pressure.

Ryan314 · 04-24-2010, 06:28 PM

How do I figure my compression ratio?

prometheum · 04-24-2010, 06:41 PM

Quote:

Originally Posted by Ryan314

How do I figure my compression ratio?

uuh just tell him what pistons you're running, what headgasket you've got and what heads you're using...any competent subaru tuner should be able to figure it out.

Ryan314 · 04-24-2010, 06:44 PM

Ok thanks. He says he's all set.

04-24-2010, 05:40 PM	#1
Ryan314 Scooby Guru Member#: 82989 Join Date: Mar 2005 Chapter/Region: SWIC Location: Arizona Vehicle: 2002 WRX Hybrid EJ257	Tuner is asking me what compression I am using. Doing a usual brand new EJ257 short block with 2.0 heads, using STi head gaskets. Tuner is asking me what compression I am using. Sorry if this sounds newb, but is he asking for my compression test numbers on all 4 cylinders? This is first time around on this stuff, help me out! * Registered users of the site do not see these ads.

04-24-2010, 06:16 PM	#4
Ryan314 Scooby Guru Member#: 82989 Join Date: Mar 2005 Chapter/Region: SWIC Location: Arizona Vehicle: 2002 WRX Hybrid EJ257	I've got a compression tester, that's not an issue. If that's what he needs it's no issue. I emailed him again to clarify. What's going on is my tuner isn't local, so he's gonna send me a base map to break-in my new block until I can get down to him for a complete road tune. Yes, I'm using the stock EJ257 pistons, so what would my compression ratio be? Last edited by Ryan314; 04-24-2010 at 06:25 PM.

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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Since everyone Is asking. "The what car is Bogus Getting" Thread.	BlackSnake	Mid West Subaru Owners Club Forum -- MWSOC	191	07-06-2007 09:20 PM
Wifey asked me what tax software to get...	C-daleRidr	Off-Topic	20	02-24-2005 09:28 PM
Go ahead, ask me what I did for my friends 21st bday...	huckedup16	Off-Topic	11	12-02-2004 12:46 PM
My friend just asked me what "ricing out a car" means	CandyO	Off-Topic	21	11-13-2003 02:32 PM
tell me what exhaust i am asking for...	DangeRS	Normally Aspirated Powertrain	9	08-19-2001 08:04 PM

04-24-2010, 05:44 PM	#2
modaddict Scooby Guru Member#: 95840 Join Date: Sep 2005 Chapter/Region: NWIC Location: Pasco, WA Vehicle: sold to a good bud awaiting next car	compression test or compression ratio? Are you using stock pistons? If he needs compression test numbers then...........you need to do a compression test. Not sure why he needs these unless he wants to verify your engine is in good working order. If he wasnts compression ratio..........we need to know which pistons you're using. I can understand why he wasnts to know this.

04-24-2010, 05:46 PM	#3
2006whitesti Scooby Specialist Member#: 124311 Join Date: Aug 2006 Chapter/Region: South East Location: Knoxville, TN Vehicle: 2006 STi, 03WRX wago 10Tribeca,00 RS,99 Foz	He is wanting you to do a compression test it sounds like. You are going to need one of these... http://www.sears.com/shc/s/p_10153_1...0070921x00003a And doing this on our cars is a real pita, because of the position of the engine/body. And like modaddict said above, I really don't understand why he would want this. Compression ratio makes more sense.

04-24-2010, 06:27 PM	#5
dr3w Scooby Specialist Member#: 222318 Join Date: Sep 2009 Chapter/Region: E. Canada Location: Montreal Vehicle: 1993 RHD GC8 Silver	He wants to know your compression ratio I guarantee you it, he couldn't care less about your cylinder compression pressure.

04-24-2010, 06:28 PM	#6
Ryan314 Scooby Guru Member#: 82989 Join Date: Mar 2005 Chapter/Region: SWIC Location: Arizona Vehicle: 2002 WRX Hybrid EJ257	How do I figure my compression ratio?

04-24-2010, 06:44 PM	#8
Ryan314 Scooby Guru Member#: 82989 Join Date: Mar 2005 Chapter/Region: SWIC Location: Arizona Vehicle: 2002 WRX Hybrid EJ257	Ok thanks. He says he's all set.