noodl35 Posted June 14, 2006 Share Posted June 14, 2006 I have received compression results from an importer of mine on a r32 rb26dett. Note that these compression results are from a cold motor so they may not be accurate. Tell me what you guys think. These results are from the timing belt side to the transmission. Cylinder 1: 170 psi Cylinder 2: 155 psi Cylinder 3: 155 psi Cylinder 4: 175 psi Cylinder 5: 170 psi Cylinder 6: 180 psi What are average compression results from rb26detts? Seems a bit low give or take 25 psi different on cylinder 2 & 3. Quote Link to comment Share on other sites More sharing options...
turbo_fb Posted June 14, 2006 Share Posted June 14, 2006 Wonder how that low comp on cyl 1-2-3 would affect the turbo sitting there, compared to the other turbo on cyl 4-5-6. If that has something to say at all. Is this an engine you are going to buy? Quote Link to comment Share on other sites More sharing options...
noodl35 Posted June 14, 2006 Author Share Posted June 14, 2006 This is just an engine that I am interested in. Not too sure what you are talking about how the turbo sits compared to the low compression results... Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted June 14, 2006 Share Posted June 14, 2006 Maybe its just me (and I don't claim to fully understand the correlation between CR and compression results) but that sounds awfully high for an engine with around 7.8:1 static CR. Go along and compression check it yourself. Dave Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted June 15, 2006 Share Posted June 15, 2006 I have received compression results from an importer of mine on a r32 rb26dett. Note that these compression results are from a cold motor so they may not be accurate. Tell me what you guys think.These results are from the timing belt side to the transmission. Cylinder 1: 170 psi Cylinder 2: 155 psi Cylinder 3: 155 psi Cylinder 4: 175 psi Cylinder 5: 170 psi Cylinder 6: 180 psi What are average compression results from rb26detts? Seems a bit low give or take 25 psi different on cylinder 2 & 3. Yeah, keep in mind 1-3 spools one turbo, and 4-6 spools the other.... is that something you want? Quote Link to comment Share on other sites More sharing options...
turbo_fb Posted June 15, 2006 Share Posted June 15, 2006 Yeah, keep in mind 1-3 spools one turbo, and 4-6 spools the other.... is that something you want? That was what I tryed to tell. I am not sure about turbos vs. twin setup but if they have same wastegates, one turbo will have to work harder to build up the pressure if the other one is slacking. So you'll maybe end up with a broken turbo. This happens on the Audi 2.7 biturbo setup. Thats the only experience I have with twin's. Their wg's are to weak so when one break, the other turbo usually breaks. Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted June 15, 2006 Share Posted June 15, 2006 That was what I tryed to tell.I am not sure about turbos vs. twin setup but if they have same wastegates' date=' one turbo will have to work harder to build up the pressure if the other one is slacking. So you'll maybe end up with a broken turbo. This happens on the Audi 2.7 biturbo setup. Thats the only experience I have with twin's. Their wg's are to weak so when one break, the other turbo usually breaks.[/quote'] Maybe he needs a fatty single =P Quote Link to comment Share on other sites More sharing options...
noodl35 Posted June 15, 2006 Author Share Posted June 15, 2006 sorry my mistake, i guess i didnt read it correctly. SIngle turbo would be nice Quote Link to comment Share on other sites More sharing options...
RB26DETT Posted June 16, 2006 Share Posted June 16, 2006 from the fatctory R32 GTR manual: standard value: 171 psi @ 300 rpm limit value: 128 psi @ 300 rpm compression variance limit between cylinders: 14 psi @ 300 rpm not sure how you got the 180 psi???!!! hope that helps, Cuong Quote Link to comment Share on other sites More sharing options...
turbo_fb Posted June 16, 2006 Share Posted June 16, 2006 not sure how you got the 180 psi???!!! Maybe it had some gas leftover or injectors still operating. Maybe he needs a fatty single =P Big fatty never lets you down Quote Link to comment Share on other sites More sharing options...
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