I didn't take into account that my bores are 20 over when I did the math for gaping them, and now they are ground to what was calculated for the STD bore. I know its minimal, but would rather know its right before assembly, which I I'm supposed to start on this weekend.
on a side note, did anyone have trouble messing up the plastigauge when checking the oil clearances for the crank?
well did you get std bore rings or .020 over rings is the question. if you got the .020's then it wont matter what the gap is for them vs std cuz it should be the same for your purpose whatever that may be... boost, nitrous, n/a etc.
if you are saying you used std rings on an .020 piston than they are definitely incorrect.
I choose the technology built for land speed records... not the technology built to save on emissions and gas mileage.
yeah everything is is for .020, application is for boost
How does the bore size factor into any "calculation" of the ring gap? You put the ring in the finished cyl, square it up with an empty piston and measure the gap with a feeler gauge.
Wiseco has some guidelines for their ring packs whether you are running boost, nitrous, or NA... So your ring manufacturer should have suggested gaps.
Buildin' n' Boostin for 08' - Alex Richards
Lol who mods the performance forum? They should learn a thing or two about performance. Hehe
USACi =>146.9db
14.88 @ 90.73MPH =>GM Charger, Motor Mounts, Catback exhaust
bore size X application in chart = gap needed
bore in MM /25.4 = bore in inches
86.5/25.4 = 3.4055 3.4055 X .005 = .0170
.017 sounds about right for boost to me. them bastids need a good amount of room to move LOL
I choose the technology built for land speed records... not the technology built to save on emissions and gas mileage.
top ring is .017 and second is .0187, sorry I meant to put that with the other info there
Cinny wrote:top ring is .017 and second is .0187, sorry I meant to put that with the other info there
I know stock non boosted is around .013, but GM allows for up to .025 as acceptable.
FU Tuning
.025?!?!!? good god u guess gm's ok with a @!#$ load of blowby?
I choose the technology built for land speed records... not the technology built to save on emissions and gas mileage.
Alex Richards wrote:How does the bore size factor into any "calculation" of the ring gap? You put the ring in the finished cyl, square it up with an empty piston and measure the gap with a feeler gauge.
Wiseco has some guidelines for their ring packs whether you are running boost, nitrous, or NA... So your ring manufacturer should have suggested gaps.
THIS.
Maths for ring gap? News to me.
- Your not-so-local, untrained, uncertified, backyard mechanic. But my @!#$ runs
Mine are as follows:
Top= .017"
Oils= untouched
Bottom= .018"
As long as your measuring the rings with a feeler once set an inch or so below the deck and getting the measurements you have listed your dead on.
ASE Master Certified Automotive Technician
