| Go back to previous topic | | Forum name | Turbo/Nitrous Tech | | Topic subject | compression test..what does it mean?? | | Topic URL | https://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
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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.
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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.
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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.
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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.
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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

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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.
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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??
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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

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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> 
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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

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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 =/
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