ring gaps....
01-11-2012, 06:24 PM
#1
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ring gaps.... the engine shop pre-fit/filed the rings for me but neglected to label which ring pack for each cylinder. so today i went through the process of going through each ring and fitting them per cylinder. these are the numbers i got...
(1st ring/2nd ring)"
1 - .024/.026
2 - .025/.027
3 - .026/.028
4 - .027/.029
5 - .024/.026
6 - .023/.025
7 - .024/.026
8 - .027/.029
the motor is a .030 over 6.0L iron block, will have single turbo 15+ lbs boost and spend most of its time 1/4mile at a time with street cruises in between.
while im here ill also ask, the pistons arent labeled for cylinder either, is there a magic touch aside from the F means front marks?
appreciate any and all assistance, thanks!
kyle.
(1st ring/2nd ring)"
1 - .024/.026
2 - .025/.027
3 - .026/.028
4 - .027/.029
5 - .024/.026
6 - .023/.025
7 - .024/.026
8 - .027/.029
the motor is a .030 over 6.0L iron block, will have single turbo 15+ lbs boost and spend most of its time 1/4mile at a time with street cruises in between.
while im here ill also ask, the pistons arent labeled for cylinder either, is there a magic touch aside from the F means front marks?
appreciate any and all assistance, thanks!
kyle.
01-11-2012, 08:28 PM
#2
I was hoping you were going to say boosted looking at those gaps.....your not going to pinch a ring thats for sure....LOL
Its right there though....more consistent would have been bonus and erring towards the low side of your range IMO but what you have will run just fine.
Regarding piston fitment if you have a 4-5" mic to measure your piston shirts and a dial bore gage to properly measure your cylinders you could fit the larger of the pistons in the larger holes etc. etc. Without the right tools you just have to pray the machine work is spot on and the pistons are all exactly the same size.....in the real world that's probably not the case but even if its close and the piston to wall clearance is in the ballpark it should run fine.
Good luck with the new build....
-Tony
Its right there though....more consistent would have been bonus and erring towards the low side of your range IMO but what you have will run just fine.
Regarding piston fitment if you have a 4-5" mic to measure your piston shirts and a dial bore gage to properly measure your cylinders you could fit the larger of the pistons in the larger holes etc. etc. Without the right tools you just have to pray the machine work is spot on and the pistons are all exactly the same size.....in the real world that's probably not the case but even if its close and the piston to wall clearance is in the ballpark it should run fine.
Good luck with the new build....
-Tony
the engine shop pre-fit/filed the rings for me but neglected to label which ring pack for each cylinder. so today i went through the process of going through each ring and fitting them per cylinder. these are the numbers i got...
(1st ring/2nd ring)"
1 - .024/.026
2 - .025/.027
3 - .026/.028
4 - .027/.029
5 - .024/.026
6 - .023/.025
7 - .024/.026
8 - .027/.029
the motor is a .030 over 6.0L iron block, will have single turbo 15+ lbs boost and spend most of its time 1/4mile at a time with street cruises in between.
while im here ill also ask, the pistons arent labeled for cylinder either, is there a magic touch aside from the F means front marks?
appreciate any and all assistance, thanks!
kyle.
(1st ring/2nd ring)"
1 - .024/.026
2 - .025/.027
3 - .026/.028
4 - .027/.029
5 - .024/.026
6 - .023/.025
7 - .024/.026
8 - .027/.029
the motor is a .030 over 6.0L iron block, will have single turbo 15+ lbs boost and spend most of its time 1/4mile at a time with street cruises in between.
while im here ill also ask, the pistons arent labeled for cylinder either, is there a magic touch aside from the F means front marks?
appreciate any and all assistance, thanks!
kyle.
01-11-2012, 09:03 PM
#3
Staging Lane
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Tony, thanks a ton for the reply. i was really hoping the words "dial bore guage" wouldnt be brought up haha. i can outside mic all day long, but the "touch" required for that tool i just havent had the experience with. im trying to get ahold of a friend who does have the tools/experience though. im a simple "more time than money" guy and simply can not afford to build this motor twice. luckily time is on my side haha.
01-12-2012, 09:06 PM
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You can also put each piston in a cylinder and measure piston to bore using a feeler gauge but You have to be careful because You can scratch the pistons and cylinder walls a little .
01-13-2012, 11:19 AM
#6
Tony, thanks a ton for the reply. i was really hoping the words "dial bore guage" wouldnt be brought up haha. i can outside mic all day long, but the "touch" required for that tool i just havent had the experience with. im trying to get ahold of a friend who does have the tools/experience though. im a simple "more time than money" guy and simply can not afford to build this motor twice. luckily time is on my side haha.
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01-13-2012, 01:55 PM
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I'd just do some swapping until you find the right mix. So swap the .023 top ring with the .027 top ring, swap the .025 and .029 bottom rings, etc. Without a way to accrately measure the bores and pistons you're kind of SOL there though. Not SOL but you just can't try and match them up. Piston tolerances are pretty tight these days though so it "shouldn't" matter.
