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Author Topic: Let's talk ring choice  (Read 2763 times)
69 Merc
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« Reply #15 on: October 18, 2010, 10:06:39 pm »
Quote from: woody on October 18, 2010, 09:58:33 pm
No there not, maybe in the pic they look like it.


 



Do you "double-stack" the top two compression rings?  (My top white arrow area)

* 2010-10-18_190044.jpg (55.94 KB, 611x460 - viewed 63 times.)
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Robert's 1969 Mercury Montego (FordStrokers 408W, QFT 850cfm RQ-AN, Super Victor, 2" aluminum open spacer, CamMotion HR .624/.609 251/256 108, mV/B C4, 5000 stall, 9" 4.56, M/T ET radial streets 315/60-15)

The Merc started here = http://sbftech.com/index.php/topic,27178.0.html

Irwindale Speedway 1/8 mile (1st time at a track!) = 7.647 @ 90.78mph with a crappy 1.878 sixty foot (3850# race weight)

Present day Merc = http://sbftech.com/index.php/topic,34648.0.html


Quote from: HIGHVOLTJ on June 19, 2013, 04:44:24 pm
Except that engine building (properly) is a labor intensive industry.  Who do you think does all the measuring and machining?  Little engine shop fairies?  Not to mention assembly, mock up and parts fitting.

At Woody's level you are not just paying for his labor but for his skill set as well.
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« Reply #16 on: October 18, 2010, 10:18:26 pm »
No, the picture is misleading. The top and bottom dots are the same ring package, the vertical line is an anti detonation groove.

* 2010-10-18_190044.jpg (46.43 KB, 611x460 - viewed 81 times.)
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Make sure you get your information from the internet gurus that haven't built SHIT, they did sleep at Holiday Inn last night, and we have a few of those gurus right here on this forum. Smiley
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« Reply #17 on: October 18, 2010, 10:33:47 pm »
They sure look the same to me?
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« Reply #18 on: October 18, 2010, 10:35:15 pm »
Quote from: rob342 on October 18, 2010, 04:19:22 pm
Quote from: Blk88GT on October 18, 2010, 09:35:31 am
Gaps are set up as follows:

Top: .029
2nd: .028
Oil: .035


why do you have to gap the oil rings and I did not? just wondering

rob

you know, i only asked this because i thought i missed a step and i was about to go tear my shit apart. i never buillt a motor before and i thought i missed a step. i'd rather tear it apart than miss a step. f that. lol. my instructions were three numbers woody penciled onto a small scrap of paper, common sense, and a real good book written by an engineer.
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« Reply #19 on: October 18, 2010, 10:54:47 pm »
Quote from: rob342 on October 18, 2010, 10:35:15 pm
Quote from: rob342 on October 18, 2010, 04:19:22 pm
Quote from: Blk88GT on October 18, 2010, 09:35:31 am
Gaps are set up as follows:

Top: .029
2nd: .028
Oil: .035


why do you have to gap the oil rings and I did not? just wondering

rob

you know, i only asked this because i thought i missed a step and i was about to go tear my shit apart. i never buillt a motor before and i thought i missed a step. i'd rather tear it apart than miss a step. f that. lol. my instructions were three numbers woody penciled onto a small scrap of paper, common sense, and a real good book written by an engineer.
   so what was your gap on the oil rings  ?    or did you measure drag ?    joe
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« Reply #20 on: October 18, 2010, 11:00:44 pm »
Quote from: Red5.0 on October 18, 2010, 10:33:47 pm
They sure look the same to me?


These below look identical in size to me --> (the top pic)


Where-as the middle pic (which is the OP's) are not the same size --> (I don't get it yet)
(Unless you put in the top ring and there is an "open" area underneath it -- maybe that is what Woody meant?)



The bottom pic -->


  
Quote from: woody on October 18, 2010, 10:18:26 pm
No, the picture is misleading. The top and bottom dots are the same ring package, the vertical line is an anti detonation groove.




* 2010-10-18_195812.jpg (85.29 KB, 324x292 - viewed 63 times.)

* 2010-10-18_190044.jpg (55.94 KB, 611x460 - viewed 72 times.)

* dfdf.jpg (139.17 KB, 582x427 - viewed 57 times.)
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Robert's 1969 Mercury Montego (FordStrokers 408W, QFT 850cfm RQ-AN, Super Victor, 2" aluminum open spacer, CamMotion HR .624/.609 251/256 108, mV/B C4, 5000 stall, 9" 4.56, M/T ET radial streets 315/60-15)

The Merc started here = http://sbftech.com/index.php/topic,27178.0.html

Irwindale Speedway 1/8 mile (1st time at a track!) = 7.647 @ 90.78mph with a crappy 1.878 sixty foot (3850# race weight)

Present day Merc = http://sbftech.com/index.php/topic,34648.0.html


Quote from: HIGHVOLTJ on June 19, 2013, 04:44:24 pm
Except that engine building (properly) is a labor intensive industry.  Who do you think does all the measuring and machining?  Little engine shop fairies?  Not to mention assembly, mock up and parts fitting.

At Woody's level you are not just paying for his labor but for his skill set as well.
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« Reply #21 on: October 18, 2010, 11:03:02 pm »
Quote from: oldmanjoe on October 18, 2010, 10:54:47 pm
Quote from: rob342 on October 18, 2010, 10:35:15 pm
Quote from: rob342 on October 18, 2010, 04:19:22 pm
Quote from: Blk88GT on October 18, 2010, 09:35:31 am
Gaps are set up as follows:

Top: .029
2nd: .028
Oil: .035


why do you have to gap the oil rings and I did not? just wondering

rob

you know, i only asked this because i thought i missed a step and i was about to go tear my shit apart. i never buillt a motor before and i thought i missed a step. i'd rather tear it apart than miss a step. f that. lol. my instructions were three numbers woody penciled onto a small scrap of paper, common sense, and a real good book written by an engineer.
   so what was your gap on the oil rings  ?    or did you measure drag ?    joe

i didn't even check. i worried about it for a minute, but then i searched this site and found

http://sbftech.com/index.php/topic,27337.msg283744.html#msg283744

three posts up from the bottom, i found a BIG SIGH OF RELIEF
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« Reply #22 on: October 19, 2010, 06:54:45 am »
69, look at the SIDE of the piston, not just up front where it's washed out by the flash.  You'll see the top is the same as the 2nd. 
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« Reply #23 on: October 19, 2010, 09:19:09 am »
I'll get some more shots of the piston tonight. Some good info in this thread so far.

Woody, how much would you trust these pistons up to? What about my rotating assembly?
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Ian
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« Reply #24 on: October 19, 2010, 09:22:26 am »
Quote from: Blk88GT on October 19, 2010, 09:19:09 am
I'll get some more shots of the piston tonight. Some good info in this thread so far.

Woody, how much would you trust these pistons up to? What about my rotating assembly?
Depends on how thick the crown of the piston is, but I can pretty much guarantee its easily thick enough for a 400 shot. The crank is fine in regards to power, the rod at most I would put a bolt in it, IF it has the 8740 capscrew currently.
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331-347 Short Blocks 2099.00 and up
408-418-427 Short Blocks (F4 Roller Blocks Standard) 2399.99 and up
Dart Shorts 4199.00+
D.I.Y Shortblocks 1799.00
FordStrokers.com

Make sure you get your information from the internet gurus that haven't built SHIT, they did sleep at Holiday Inn last night, and we have a few of those gurus right here on this forum. Smiley
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« Reply #25 on: October 19, 2010, 09:26:40 am »
Thank you very much Jim, I really appreciate your input.

At least I'm getting some use out of the pistons. They cost me a goddamn fortune over 6 years ago!
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« Reply #26 on: October 20, 2010, 06:01:24 pm »
Quote from: 69 Merc on October 18, 2010, 09:57:25 pm
Quote from: Blk88GT on October 18, 2010, 09:00:42 pm
Bore: 4.030
Comp height: 1.255
Pin diameter: .927
Top groove: .064
2nd groove: .064
Oil groove: .218
Piston weight: 469g

1.1" from bottom of oil groove to center of pin.





I'm confused.

You list the same for the 1st and 2nd ring's -- yet from the pic they are vastly different in size?   


I think where the confusion comes from is that the dimensions Ian listed are the sizes of the ring gaps for the rings to fit into. It's not the distance from the dome to the top ring and then between the top ring to the second ring and so on.. Hope this helsp.. Steve
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69 Merc
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« Reply #27 on: October 20, 2010, 06:16:52 pm »
The three recessed grooves that are in the piston for the rings -- all of them are different sizes.


That is where I'm confused.
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Robert's 1969 Mercury Montego (FordStrokers 408W, QFT 850cfm RQ-AN, Super Victor, 2" aluminum open spacer, CamMotion HR .624/.609 251/256 108, mV/B C4, 5000 stall, 9" 4.56, M/T ET radial streets 315/60-15)

The Merc started here = http://sbftech.com/index.php/topic,27178.0.html

Irwindale Speedway 1/8 mile (1st time at a track!) = 7.647 @ 90.78mph with a crappy 1.878 sixty foot (3850# race weight)

Present day Merc = http://sbftech.com/index.php/topic,34648.0.html


Quote from: HIGHVOLTJ on June 19, 2013, 04:44:24 pm
Except that engine building (properly) is a labor intensive industry.  Who do you think does all the measuring and machining?  Little engine shop fairies?  Not to mention assembly, mock up and parts fitting.

At Woody's level you are not just paying for his labor but for his skill set as well.
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« Reply #28 on: October 20, 2010, 06:23:17 pm »
Quote from: 69 Merc on October 20, 2010, 06:16:52 pm
The three recessed grooves that are in the piston for the rings -- all of them are different sizes.


That is where I'm confused.

But they aren't. The top 2 are the same size.
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69 Merc
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« Reply #29 on: October 20, 2010, 07:47:32 pm »
Quote from: Red5.0 on October 20, 2010, 06:23:17 pm
Quote from: 69 Merc on October 20, 2010, 06:16:52 pm
The three recessed grooves that are in the piston for the rings -- all of them are different sizes.


That is where I'm confused.

But they aren't. The top 2 are the same size.


Oh crap!!!


I just saw it now, finally!

The ring recesses are the black colored looking gaps while looking towards the side of the piston.

I was not seeing it that way before.

Fuckin' brain farts.   I'm sorry


Thanks for setting me straight you all.   Thanx!





Good luck to Blk88GT in spraying a 400hp shot of the stuff.  May he run a safe personal best!
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Robert's 1969 Mercury Montego (FordStrokers 408W, QFT 850cfm RQ-AN, Super Victor, 2" aluminum open spacer, CamMotion HR .624/.609 251/256 108, mV/B C4, 5000 stall, 9" 4.56, M/T ET radial streets 315/60-15)

The Merc started here = http://sbftech.com/index.php/topic,27178.0.html

Irwindale Speedway 1/8 mile (1st time at a track!) = 7.647 @ 90.78mph with a crappy 1.878 sixty foot (3850# race weight)

Present day Merc = http://sbftech.com/index.php/topic,34648.0.html


Quote from: HIGHVOLTJ on June 19, 2013, 04:44:24 pm
Except that engine building (properly) is a labor intensive industry.  Who do you think does all the measuring and machining?  Little engine shop fairies?  Not to mention assembly, mock up and parts fitting.

At Woody's level you are not just paying for his labor but for his skill set as well.
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