tim si Posted February 24, 2009 Report Share Posted February 24, 2009 does any body have any good info on the best ring gap for turbo motors?i know alot of racers like to run a tight ring gap,but if you go with nitrous you run a bigger gap.will the turbo motor be more like the nitrous motor.i would like to cut back on blow-by by closing the gap,but need to know the pros and cons.this isnt a 2.6 i just mean turbo engines in general,thanks Link to comment Share on other sites More sharing options...
ucw458 Posted February 24, 2009 Report Share Posted February 24, 2009 Zero gap is best. Use total seal gapless rings. It's a 2 piece 2nd ring that gives you no gap. They have a leakdown rate of less than 1% vs standard rings can have a leakdown rate of 10% Link to comment Share on other sites More sharing options...
Caliber308 Posted February 24, 2009 Report Share Posted February 24, 2009 I use Hastings rings. Total Seal rings have had lots of problems in our motors. Send a P.M. to Dad and ask him. CALIBER 308 Link to comment Share on other sites More sharing options...
19cturbo Posted February 24, 2009 Report Share Posted February 24, 2009 Yeah i have always heard total seal rings were only good for about 10,000 miles.. but this has nothing to do with the question at hand, i was just saying.. Link to comment Share on other sites More sharing options...
Caliber308 Posted February 24, 2009 Report Share Posted February 24, 2009 (edited) Yeah i have always heard total seal rings were only good for about 10,000 miles.. but this has nothing to do with the question at hand, i was just saying.. That's why I told him to P.M. Dad ??? After all, We have do idea what so ever on the type pistons he is using?? His question is best left up to the guy that does this sort of thing for a living. CALIBER 308 Edited February 24, 2009 by Caliber308 Link to comment Share on other sites More sharing options...
UlrichWolf Posted February 24, 2009 Report Share Posted February 24, 2009 I intentionally set my ring gap a little wider. I was told to by both Dad, and the shop that I had build my engine. Logically, it makes sense. You will have more heat, and more pressure, so the ring will expand a little bit more, so you want to give it room. Makes sense to me, anyway. Tim Link to comment Share on other sites More sharing options...
19cturbo Posted February 24, 2009 Report Share Posted February 24, 2009 That's why I told him to P.M. Dad ??? After all, We have do idea what so ever on the type pistons he is using?? His question is best left up to the guy that does this sort of thing for a living. CALIBER 308 correct, i was just throwing that out there, dad is the man for this question. Link to comment Share on other sites More sharing options...
Caliber308 Posted February 24, 2009 Report Share Posted February 24, 2009 (edited) If the poster is looking for the stock ring gap info for a G54B Turbo, here it is: Piston ring end gap: Standard value: No 1. 0.0118-0.0177 in. No 2. 0.0098-0.0158 in. Oil Ring. 0.0118-0.0177 in. CALIBER 308 Edited February 24, 2009 by Caliber308 Link to comment Share on other sites More sharing options...
tim si Posted February 24, 2009 Author Report Share Posted February 24, 2009 well i looked at total seal and they have a TNT ring thats built for forced induction.im not sure what pistons im gonna use yet.right now i have stock forged flat tops.im thinking of buying a stroker kit and want the right rings to eliminate as much blow by as possible but save room for expanding under daily driving conditions. Link to comment Share on other sites More sharing options...
tim si Posted February 24, 2009 Author Report Share Posted February 24, 2009 thanks Cal but im not running 2.6.but its still good info.thats pretty tight.my 5.0 was around0.018.i was actually thinking it should be around 010 to 012 Link to comment Share on other sites More sharing options...
ucw458 Posted February 24, 2009 Report Share Posted February 24, 2009 I've used gapless rings on several motors and never had a problem. They have several grades of ring for different types of motors. If some of you have had problems with gapless rings I was not aware of it. Link to comment Share on other sites More sharing options...
Guest Posted February 24, 2009 Report Share Posted February 24, 2009 We use conventional NPR Japanese made rings on most of our 4 cyl rebuilds. Havent' had any problems w/ them as long as the bore and ring set up are set properly. and I'll agree w/ previous poster on the ring expansion theory, my builder and machine shop recommend some gap to allow for heat expansion. Link to comment Share on other sites More sharing options...
Elkidmino Posted February 24, 2009 Report Share Posted February 24, 2009 The OP stated that this is NOT for a G54B. He means engines in general. What type of motor? GM, FORD? SB, BB? Link to comment Share on other sites More sharing options...
Shelby Posted February 24, 2009 Report Share Posted February 24, 2009 understand some thing race engines as in drag only is totaly diff from your street driven car ,, just because some thing works for 15 sec and may never see 1000 imiles in it's life ,does not mean it's the best thing for your engine Link to comment Share on other sites More sharing options...
Dcrasta Posted February 24, 2009 Report Share Posted February 24, 2009 I intentionally set my ring gap a little wider. I was told to by both Dad, and the shop that I had build my engine. Logically, it makes sense. You will have more heat, and more pressure, so the ring will expand a little bit more, so you want to give it room. Makes sense to me, anyway. Tim But to be sure check with your piston manufacturer. Dad is a good resource also. 1 Link to comment Share on other sites More sharing options...
Dad Posted February 24, 2009 Report Share Posted February 24, 2009 Stock build I stay closer to stock specs on the ring gap. If it's a performance build then I will stay to the larger side of specs. More compression, more boost, = more heat and expansion of the rings so larger gap. General rulle is .004 gap per inch of bore. EG= 4" bore x .004 per inch = .016 ring gap Now if it's drag race or track go .0055 per inch of bore. Also some will recommend the 2nd ring gap be larger than the top ring gap to reduce top ring flutter Dad Link to comment Share on other sites More sharing options...
Whiplash Posted February 25, 2009 Report Share Posted February 25, 2009 Also some will recommend the 2nd ring gap be larger than the top ring gap to reduce top ring flutter Dad Yep. When using Hyper type pistons it's recommended to add 20% end gap to the second ring over the top ring. Link to comment Share on other sites More sharing options...
tim si Posted February 25, 2009 Author Report Share Posted February 25, 2009 thanks to all for the info.the engine is a ford 5.0.i may be building a stroker and wanted to run a tighter gap but its main priority is to drive daily on the street.maybe ill just have to go with a vacuum pump. Link to comment Share on other sites More sharing options...
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