slow_99integra
Stinkin & Drinkin
Anyone thinking of turboing their teg? i found this through my travels, According to Jeff Evans-
"8:1~8.5:1 compression: 150-170 psi per cylinder
8.5:1~9.5:1 compression: 170-210 psi per cylinder
9.5:1~11:1 compression: 210-275 psi per cylinder
11:1+ compression: 250+ per cylinder (highly depends on cams being used)
This is an estimate. What the goal is to have no more than 20 psi variances between each cylinder. Ideally you want to see as close of compression between cylinders as possible. If you see a large variance in one of the cylinders (more than 20psi+), there are a few more steps that should be taken:
a. Put a cap full of oil down the spark plug hole. Redo the compression test. If the compression goes up more than 15-20psi, your rings arent sealing and need to be replaced. The oil temporarily seals the damaged part of the ring, and gives higher compression.
b. Do a leak down test. While doing the leak down test keep your radiator cap off of the radiator. Get each cylinder up to TDC at the piston, as well as TDC at the valves. The firing order is 1-3-4-2. Its easiest to check what cylinder is at TDC with a long rod touching the top of the piston, at the peak of its travel you are at TDC on either 1 and 4, or 2 and 3. With the leakdown test you should see less than 10%. If you are seeing more than 10%, listen to where the air pressure is escaping. Put your finger over the oil dipstick hole on the block. If the rings are shot, or you have a hole in the piston the dipstick hole will get pressurized, and you'll feel the pressure on your finger tip covering the hole. Watch the coolant with the radiator cap off. If while doing the leak down test you see bubbling on a specific cylinder, the headgasket is tore or the sleeve sunk in that cylinder (those with sleeved blocks). The air pressure is getting past the headgasket and pressurizing the coolant jacket, causing the bubbling.
If you getting white smoke it indicates you are burning coolant. This can happen with a bad headgasket, sinking sleeve or cracked sleeve. The leak down test should confirm this by the bubbling in the radiator. If you are getting blue smoke you are burning oil, this can be from worn rings, bad valve guides or valve stem seals, or turbo seals are shot (if you are turbo). If you are getting black smoke you are running rich. You should be able to smell a rich condition if you are getting black smoke".
GSROWNSU, everything in red i believe will help you. if you already know this oh well.
"8:1~8.5:1 compression: 150-170 psi per cylinder
8.5:1~9.5:1 compression: 170-210 psi per cylinder
9.5:1~11:1 compression: 210-275 psi per cylinder
11:1+ compression: 250+ per cylinder (highly depends on cams being used)
This is an estimate. What the goal is to have no more than 20 psi variances between each cylinder. Ideally you want to see as close of compression between cylinders as possible. If you see a large variance in one of the cylinders (more than 20psi+), there are a few more steps that should be taken:
a. Put a cap full of oil down the spark plug hole. Redo the compression test. If the compression goes up more than 15-20psi, your rings arent sealing and need to be replaced. The oil temporarily seals the damaged part of the ring, and gives higher compression.
b. Do a leak down test. While doing the leak down test keep your radiator cap off of the radiator. Get each cylinder up to TDC at the piston, as well as TDC at the valves. The firing order is 1-3-4-2. Its easiest to check what cylinder is at TDC with a long rod touching the top of the piston, at the peak of its travel you are at TDC on either 1 and 4, or 2 and 3. With the leakdown test you should see less than 10%. If you are seeing more than 10%, listen to where the air pressure is escaping. Put your finger over the oil dipstick hole on the block. If the rings are shot, or you have a hole in the piston the dipstick hole will get pressurized, and you'll feel the pressure on your finger tip covering the hole. Watch the coolant with the radiator cap off. If while doing the leak down test you see bubbling on a specific cylinder, the headgasket is tore or the sleeve sunk in that cylinder (those with sleeved blocks). The air pressure is getting past the headgasket and pressurizing the coolant jacket, causing the bubbling.
If you getting white smoke it indicates you are burning coolant. This can happen with a bad headgasket, sinking sleeve or cracked sleeve. The leak down test should confirm this by the bubbling in the radiator. If you are getting blue smoke you are burning oil, this can be from worn rings, bad valve guides or valve stem seals, or turbo seals are shot (if you are turbo). If you are getting black smoke you are running rich. You should be able to smell a rich condition if you are getting black smoke".
GSROWNSU, everything in red i believe will help you. if you already know this oh well.