h22 turbo civic low dyno numbers
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h22 turbo civic low dyno numbers
I had the car for around 3 years. H22A 5 speed w/p28 chipped ecu. I installed a turbo kit and had the car tuned using Neptune, at that time the car put 305hp on dynojet. Last few days i replaced the turbo because it was smoking, I went to the dyno again and was very disappointed with the results only it makes 210hp!! I went home and made a compression test and the numbers were too low 115,110,140,135. I dont have access for leakdown tester and i dont have an air compressor. I suspect the head gasket but i dont know if i have worn rings too. Is there any method to check. I have some issues that makes me think it is the head gasket; The car temp gauge bounces sometimes i replaced the sensor,wiring and gauge but still same. The radiator is brand new and the coolant color turned to brown. Also the dizzy leaks internally i replaced the seal and tried another dizzy still leaked. I am not loosing oil. Any suggestions before pulling the head?
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From: Bowling Green, ky, USA
Re: h22 turbo civic low dyno numbers
Those are some very low test numbers, I tested mine the other day (b18c1 @ 9.1 compression) and mine was like 208,210,210,210. What compression is your setup? Most compression testers will disconnect from the gauge so you can plug your air hose into each cylinder, it don’t take very much air pressure to here where the leaks are. Air from dipstick or valve cover would be bad rigs, from intake or exhaust would be valves, from radiator could be head gasket. Just set each cylinder to top dead center to test.
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Re: h22 turbo civic low dyno numbers
Those are some very low test numbers, I tested mine the other day (b18c1 @ 9.1 compression) and mine was like 208,210,210,210. What compression is your setup? Most compression testers will disconnect from the gauge so you can plug your air hose into each cylinder, it don’t take very much air pressure to here where the leaks are. Air from dipstick or valve cover would be bad rigs, from intake or exhaust would be valves, from radiator could be head gasket. Just set each cylinder to top dead center to test.
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From: Bowling Green, ky, USA
Re: h22 turbo civic low dyno numbers
‘just need to be able to feed air into the cylinder to listen for leaks. It’s been a long time since I had the need to do a leak test. YouTube how to do a leak test is what I recommend
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From: Bowling Green, ky, USA
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Re: h22 turbo civic low dyno numbers
So redid the test again with the motor warm up and disconnected the ecu and got the accurate numbers 123,120,150,155 it does increased a bit. I need to get my hands on leak down tester and air compressor. Guys anyone knows a cheap and good air compressor? Can’t I just buy the portable one and modify the fittings?
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Re: h22 turbo civic low dyno numbers
So redid the test again with the motor warm up and disconnected the ecu and got the accurate numbers 123,120,150,155 it does increased a bit. I need to get my hands on leak down tester and air compressor. Guys anyone knows a cheap and good air compressor? Can’t I just buy the portable one and modify the fittings?
You can rent a compression tester FREE from AutoZone. By removing the Shrader valve, the tester is converted to a leakdown tester.
https://www.autozone.com/loan-a-tool...set/695110_0_0
You can buy an adequate inexpensive air compressor from Harbor Freight Tools. Be sure to get a 20% off coupon from DealsPlus.
This may be adequate:
https://www.harborfreight.com/3-gall...sor-95275.html
Last edited by muellersfan; Oct 28, 2018 at 09:41 PM.
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Re: h22 turbo civic low dyno numbers
Did you do the test with all spark plugs removed at wide open throttle (WOT).
You can rent a compression tester FREE from AutoZone. By removing the Shrader valve, the tester is converted to a leakdown tester.
https://www.autozone.com/loan-a-tool...set/695110_0_0
You can buy an adequate inexpensive air compressor from Harbor Freight Tools. Be sure to get a 20% off coupon from DealsPlus.
This may be adequate:
https://www.harborfreight.com/3-gall...sor-95275.html
You can rent a compression tester FREE from AutoZone. By removing the Shrader valve, the tester is converted to a leakdown tester.
https://www.autozone.com/loan-a-tool...set/695110_0_0
You can buy an adequate inexpensive air compressor from Harbor Freight Tools. Be sure to get a 20% off coupon from DealsPlus.
This may be adequate:
https://www.harborfreight.com/3-gall...sor-95275.html
thanks a lot bro
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Re: h22 turbo civic low dyno numbers
Pressurizing each cylinder at TDC to 40-50 PSI should allow you to identify where compression is lost.
Based on the information provided, the head gasket is almost surely blown. The leakdown may verify the latter diagnosis, though a cracked block or head is another possibility.
You can obtain information about piston ring/cylinder wear by comparing cylinder PSI readings from compression tests done with versus without addition of a tablespoon or so of engine oil to each cylinder.
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