|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
02-20-2015, 12:25 PM | #1 |
Senior Member
Join Date: Jun 2013
Drives: FR-S
Location: Corona
Posts: 715
Thanks: 149
Thanked 546 Times in 261 Posts
Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
|
Compression/cylinder?
Anybody know how much compression our motors should be showing per cylinder? I checked on ProDemand and it's showing 167 PSI min, 254 PSI max, 29 PSI max variance. Can anybody confirm this?
Thanks |
02-20-2015, 12:30 PM | #2 |
Senior Member
Join Date: Jul 2013
Drives: toyota mr2/ Toyota GT86
Location: UK
Posts: 438
Thanks: 3
Thanked 140 Times in 92 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
when I checked mine it was about 180psi on all cylinders
|
The Following User Says Thank You to 350matt For This Useful Post: | Amir Ghadiri (02-21-2015) |
02-20-2015, 12:34 PM | #3 |
Senior Member
Join Date: Jun 2013
Drives: FR-S
Location: Corona
Posts: 715
Thanks: 149
Thanked 546 Times in 261 Posts
Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
|
That's what I thought it should be at, thank you!
__________________
|
02-20-2015, 01:17 PM | #4 |
Banned
Join Date: Sep 2013
Drives: 2013 GBS BRZ Limited
Location: Colorado
Posts: 1,925
Thanks: 627
Thanked 1,445 Times in 711 Posts
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
|
14.7 PSI (atmospheric pressure at your altitude) * 12.5 (86 compression ratio ) = 183.75 PSI.
So that is the number that you should never be able to exceed with "static" CR (cranking it). At full speed, the "dynamic CR" is different. |
The Following 3 Users Say Thank You to stugray For This Useful Post: |
02-21-2015, 02:23 AM | #5 | |
Senior Member
Join Date: Jun 2013
Drives: FR-S
Location: Corona
Posts: 715
Thanks: 149
Thanked 546 Times in 261 Posts
Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Thank you very much, I appreciate it!!
__________________
|
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
compression+boost? | subatoy | Forced Induction | 74 | 01-30-2015 04:32 PM |
Compression/Rebound Adjustments | amaciose | Suspension | Chassis | Brakes -- Sponsored by 949 Racing | 8 | 12-10-2014 04:51 AM |
Low compression? | Venator | Engine, Exhaust, Transmission | 4 | 06-17-2014 10:37 AM |
Low Compression Pistons vs New Shortblock | SilverTipp | Forced Induction | 11 | 04-11-2014 05:45 PM |
Low Compression - 10:1 // 9:1 | 1086 | Engine, Exhaust, Transmission | 12 | 12-13-2013 05:46 PM |