How to tell if I have good compression?

***TitaniumTT*** · 05-30-2009, 07:51 PM

Banzai-Racing has a very detailed write-up on thier site.

FWIW - I was talking to one of the tech guys @ Motec who is also a Rotary guy. He was telling me that he uses his M800 to check his compression. So simple it's genius actually.

He goes into Dig 4 and sets it up as the ignition switch, basically turning off the ign/fuel pump. Then he gets a 0-5v 0-250PSI sender, adapts it to a piston compression tester and plugs it into his Oil Pressure input. Rolls the engine over a few times. Shuts the ignition off, moves to the other chamber and repeats. Pulls his datalogs and BAM! Digital compression test. Logged with RPMs, temp, Throttle position etc etc. I'll be rocking this method when I get the young girl rebuilt.............. again. 3 engines in 3 months

05-30-2009, 07:51 PM	#8
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son Posts: 4,581 Rep Power: 10	Banzai-Racing has a very detailed write-up on thier site. FWIW - I was talking to one of the tech guys @ Motec who is also a Rotary guy. He was telling me that he uses his M800 to check his compression. So simple it's genius actually. He goes into Dig 4 and sets it up as the ignition switch, basically turning off the ign/fuel pump. Then he gets a 0-5v 0-250PSI sender, adapts it to a piston compression tester and plugs it into his Oil Pressure input. Rolls the engine over a few times. Shuts the ignition off, moves to the other chamber and repeats. Pulls his datalogs and BAM! Digital compression test. Logged with RPMs, temp, Throttle position etc etc. I'll be rocking this method when I get the young girl rebuilt.............. again. 3 engines in 3 months __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

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