Anyone running 9:0.1 compression ? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kris86 · 06-07-2017, 08:36 PM

I'd like to know what the map sensor vacuum reading is at idle on a engine with a similar set up as mine.

I'm using CP pistons 9:0.1 compression with stock cams

I'm getting between .48 ~ .52 BAR

COO86L · 06-11-2017, 04:40 AM

Have a look here >>>>> http://www.gregsengine.com/using-a-vacuum-gauge.html

Convert .48 to .52 BAR to inches of mercury. You're currently around 14 to 15 HG which is below what you want. Could indicate vacuum leak or ring issues.

Kris86 · 06-11-2017, 04:45 PM

Quote:

Originally Posted by COO86L

Have a look here >>>>> http://www.gregsengine.com/using-a-vacuum-gauge.html

Convert .48 to .52 BAR to inches of mercury. You're currently around 14 to 15 HG which is below what you want. Could indicate vacuum leak or ring issues.

I've done a smoke pressurize leak down test and cannot find any

We changed the rings and regapped them thinking it could be that also, nothing changed

06-07-2017, 08:36 PM	#1
Kris86 Senior Member Join Date: Feb 2013 Drives: RHD Gt86 Location: Antigua, west indies Posts: 369 Thanks: 619 Thanked 102 Times in 75 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Anyone running 9:0.1 compression ? I'd like to know what the map sensor vacuum reading is at idle on a engine with a similar set up as mine. I'm using CP pistons 9:0.1 compression with stock cams I'm getting between .48 ~ .52 BAR __________________ Toyota - Making Dreams A Reality 461hp on 91octane - JDL turbo GTX3076r GEN 2 - Mazworx CD009 transmission

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Compression test numbers? Anyone done running comp test?	Crunk81us	Engine, Exhaust, Transmission	2	11-10-2017 02:35 PM
compression ratio	nexusatm	Forced Induction	38	05-13-2016 08:59 AM
KW V3: 16 clicks for compression?	h3opama	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	4	07-02-2015 09:01 PM
Low compression?	Venator	Engine, Exhaust, Transmission	4	06-17-2014 11:37 AM
Low Compression - 10:1 // 9:1	1086	Engine, Exhaust, Transmission	12	12-13-2013 06:46 PM

06-11-2017, 04:40 AM	#2
COO86L Senior Member Join Date: Dec 2015 Drives: 2015 86 GTS + Mitsi Lancer GSR Location: Lismore AUS Posts: 215 Thanks: 127 Thanked 93 Times in 68 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Have a look here >>>>> http://www.gregsengine.com/using-a-vacuum-gauge.html Convert .48 to .52 BAR to inches of mercury. You're currently around 14 to 15 HG which is below what you want. Could indicate vacuum leak or ring issues.

User Name		Remember Me?
Password