Go back to previous topic
Forum nameTurbo/Nitrous Tech
Topic subjectcompression test..what does it mean??
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i8&topic_id=8895
8895, compression test..what does it mean??
Posted by toykilla, Nov-06-01 11:40 AM
cylinders 1,2,3,4 -- 165,150,150,150
8896, RE: compression test..what does it mean??
Posted by guest, Nov-06-01 12:41 PM
Those numbers are a little low for putting on a turbo kit.

DAVE_FL
97 T-GS
HRC stage 2

Orlando DSM www.orl.dsm.org
DAVE99@cfl.rr.com

8897, RE: compression test..what does it mean??
Posted by DarkOne, Nov-06-01 12:51 PM
Was that done with the motor dead cold or something? Those numbers are a bit low.

Warm the motor up to operating temperature and ty it again. If it still comes up low, drop in a teaspoon of oil through the sparkplug well. Try again. If the numbers come up, it's worn rings. If they stay low, it's likely your valve seats or seals. If the oil doesn't tell you anything, find somewhere to do a leak-down test.

_____________________________________________
-Dino Yancey
Hello me, it's Me Again!


For Mitsubishi Technical Manuals, INCLUDING the 97-99 electrical and service manuals, click HERE:
http://www.heavenz-not-0verflowing.com/files/
No MP3 for YOU!
8898, RE: compression test..what does it mean??
Posted by toykilla, Nov-06-01 01:14 PM
that is with the engine at a normal running temp.
8899, RE: compression test..what does it mean??
Posted by Fast420A, Nov-06-01 03:27 PM
Since that was with it warm, try the oil thing and if the numbers change then you may have bad rings.




http://hometown.aol.com/ohshootuhh/

All Motor Beast in need of MAJOR TUNING

Perf:
KYB AGX Struts
Neuspeed Sport Springs
5 Strut Bars (2 F/U, F/L, R/U, R/L)
Sprint Front Camber Kit
$15 Rear Camber Kit
Corbin's A/F Gauge
MSD DIS-2 Ignition System
Some Regrind Cams that need High Compression (which I don't have)
Ported Intake Manifold
Ported Throttle Body
Nameless Cold Air Intake with a K&N Filter
Custom 2 1/2 inch exhaust with Dual DTM Muffler
Empty Catalytic Convertor
Energy Suspension Motor Mount inserts
Hurricane_GS Short Shifter
Symborsky Shift Kit
Clutchmasters Stage 3 Modular
225/50/16inch Wheels and Tires


Audio:
Alpine CD Head Unit
Alpine Flex4 25W X 4 for Fronts and Rears
Alpine V-12 450W X 1 for Subs
Infinity Reference Series 5 1/4 and 1 inch tweeter component systems for fronts and rears
Blaupunkt 3 way 6x9's in the rears
3 MTX 5000 10" 12 ohm subs running 4 ohms mono



8900, RE: compression test..what does it mean??
Posted by HadesOmega, Nov-06-01 03:56 PM
Seems normal to me as long as the cylinders aren't way off. I get low ass number like that too. some 420As got it some don't hehe.


Grrr it's gonna eat you up!
___________________
95' Eclipse RS
AFX Pulley | Autometer Bezel Gauge Holder | Modified A/F Ratio Gauge | B&M Super Oil Cooler | Energy Suspension Shifter Bushings | JAZ Oil Catchcan | 3" Magnaflow Muffler | 3" Car Sound Catalytic Converter | 3" Downpipe-back piping | HKS Air Filter | KYB AGX Shox | Skunk2 Coilovers | FU, RU, RL, and RRE FL Tie/Strut Bars | RS to TSi Rear Disc Mod | RS to TSi upgraded F&R Sway Bar | 97' Spyder Eclipse 5 Spoke Wheels | HKS Standard Blow off Valve | HKS TYPE 1 Turbo Timer | Star Stage 1 T3/T04E BB Turbo Kit | Starion Front Mount Intercooler | Schroth Autocontrol 3-Point Harness | and 1 HiGhLy SkIlLeD DrIvEr! |
Performance b4 Lookz, a car can only be as fast as it's driver! ^_^
8901, RE: compression test..what does it mean??
Posted by toykilla, Nov-06-01 04:43 PM
Well..I know I am getting a LOT of blow-by due to my engine being filled with oil everytime I boost. I think I will try that oil thing tomorrow and if thats the problem then I am getting the JE pistons, ring, locks from HRC. I think its a 0.20 over also. How are the connecting rods on 420a's?? Will I beable to run 12psi once pistons are in there??
8902, RE: compression test..what does it mean??
Posted by Fast420A, Nov-06-01 05:15 PM

Do not overboost on our rods, they suck. Just spend $1100 and get the full bottom end kit from howell. It comes with eagle rods which are rated to like 350 HP.



http://hometown.aol.com/ohshootuhh/

All Motor Beast in need of MAJOR TUNING

Perf:
KYB AGX Struts
Neuspeed Sport Springs
5 Strut Bars (2 F/U, F/L, R/U, R/L)
Sprint Front Camber Kit
$15 Rear Camber Kit
Corbin's A/F Gauge
MSD DIS-2 Ignition System
Some Regrind Cams that need High Compression (which I don't have)
Ported Intake Manifold
Ported Throttle Body
Nameless Cold Air Intake with a K&N Filter
Custom 2 1/2 inch exhaust with Dual DTM Muffler
Empty Catalytic Convertor
Energy Suspension Motor Mount inserts
Hurricane_GS Short Shifter
Symborsky Shift Kit
Clutchmasters Stage 3 Modular
225/50/16inch Wheels and Tires


Audio:
Alpine CD Head Unit
Alpine Flex4 25W X 4 for Fronts and Rears
Alpine V-12 450W X 1 for Subs
Infinity Reference Series 5 1/4 and 1 inch tweeter component systems for fronts and rears
Blaupunkt 3 way 6x9's in the rears
3 MTX 5000 10" 12 ohm subs running 4 ohms mono



8903, RE: compression test..what does it mean??
Posted by TurboDaren, Nov-07-01 06:43 AM
"420a rods suck." Never heard of them breaking>

Powered by pot
8904, RE: compression test..what does it mean??
Posted by Fast420A, Nov-07-01 07:13 AM
HA I broke one all motor! They are so small that it bent and snapped!



http://hometown.aol.com/ohshootuhh/

All Motor Beast in need of MAJOR TUNING

Perf:
KYB AGX Struts
Neuspeed Sport Springs
5 Strut Bars (2 F/U, F/L, R/U, R/L)
Sprint Front Camber Kit
$15 Rear Camber Kit
Corbin's A/F Gauge
MSD DIS-2 Ignition System
Some Regrind Cams that need High Compression (which I don't have)
Ported Intake Manifold
Ported Throttle Body
Nameless Cold Air Intake with a K&N Filter
Custom 2 1/2 inch exhaust with Dual DTM Muffler
Empty Catalytic Convertor
Energy Suspension Motor Mount inserts
Hurricane_GS Short Shifter
Symborsky Shift Kit
Clutchmasters Stage 3 Modular
225/50/16inch Wheels and Tires


Audio:
Alpine CD Head Unit
Alpine Flex4 25W X 4 for Fronts and Rears
Alpine V-12 450W X 1 for Subs
Infinity Reference Series 5 1/4 and 1 inch tweeter component systems for fronts and rears
Blaupunkt 3 way 6x9's in the rears
3 MTX 5000 10" 12 ohm subs running 4 ohms mono



8905, RE: compression test..what does it mean??
Posted by toykilla, Nov-07-01 07:43 AM
Ok, did a compression test again and well. I did it with oil 1.2.3.4 175.165.165.165 it went up a little bit. Piston rings worn right??? Damnit..That means I have to replaced pistons, rings and rods cuz I WILL NOT do them separtely =/