Compression test on a 1jz
11-13-06, 11:36 AM
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Compression test on a 1jz
I need to do a compression test on an sc300 w/ 1jz that I will pick up this weekend. What compression should it have? and other stuff that I need to inspect. Thanks for all the help guys.
Norm
Norm
11-15-06, 07:31 AM
#6
180-190 sounds a tad high for 8.5:1 CR...
follow the lines on the chart, a healthy motor will be somewhere between the two slopes... if it's higher, it probably has some carbon buildup, if it's lower, it's rings are leaking... higher is not horrible always, just a sign the engine needs a little cleaning internally...
11-23-06, 02:59 AM
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Thanks for the chart
180-190 sounds a tad high for 8.5:1 CR...
follow the lines on the chart, a healthy motor will be somewhere between the two slopes... if it's higher, it probably has some carbon buildup, if it's lower, it's rings are leaking... higher is not horrible always, just a sign the engine needs a little cleaning internally...
180-190 sounds a tad high for 8.5:1 CR...
follow the lines on the chart, a healthy motor will be somewhere between the two slopes... if it's higher, it probably has some carbon buildup, if it's lower, it's rings are leaking... higher is not horrible always, just a sign the engine needs a little cleaning internally...
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11-24-06, 02:24 PM
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91 Ls 400
hey everyone wanted to know what the compression rate(psi) was for a Lexus.
Its a 1991 Ls 400 with 235K miles on it. The numbers I got for each cylinder were:#1-200,#2-225,#3-210,#4-225,#5-209,#6-222,#7-210,#8-225. I repeated the test twice, still same numbers. If anyone can help me with this that would be great. Thanks
Its a 1991 Ls 400 with 235K miles on it. The numbers I got for each cylinder were:#1-200,#2-225,#3-210,#4-225,#5-209,#6-222,#7-210,#8-225. I repeated the test twice, still same numbers. If anyone can help me with this that would be great. Thanks
11-24-06, 02:33 PM
#9
hey everyone wanted to know what the compression rate(psi) was for a Lexus.
Its a 1991 Ls 400 with 235K miles on it. The numbers I got for each cylinder were:#1-200,#2-225,#3-210,#4-225,#5-209,#6-222,#7-210,#8-225. I repeated the test twice, still same numbers. If anyone can help me with this that would be great. Thanks
Its a 1991 Ls 400 with 235K miles on it. The numbers I got for each cylinder were:#1-200,#2-225,#3-210,#4-225,#5-209,#6-222,#7-210,#8-225. I repeated the test twice, still same numbers. If anyone can help me with this that would be great. Thanks
yours is good...
11-26-06, 08:36 PM
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Thanks alot for your help....Hopefully someone could help me out with the speedcut at 106 mph, i do have a HKS SLD, but i don't know what the settings should be on. ANYONE
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