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09-20-2009, 07:29 AM | #1 |
The oddest Todd around
Join Date: May 2004
Location: Miami, Florida
Posts: 1,418
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Parked it at the perfect time.
So... about a year ago, my 72 c-10 started making a small knocking sound, especially under load. So I parked it.
Fast forward to last week, and I have pulled the motor and have sent it to the machine shop. For a while, I was hoping maybe it was the flexplate, or harmonic balancer, but both of those looked fine when I pulled them off (replaced balancer anyway). So... I get a call from the machine shop a couple days ago... Turns out it's going to cost me a little more because I lost my crank core. Yeppers... one of the rods had tore up the crank journal pretty bad, and according to the mechanic, I was lucky I didn't throw that rod. Talk about making a good decision...
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"The greatest pleasure is to vanquish your enemies and chase them before you, to rob them of their wealth and see those dear to them bathed in tears, to ride their horses and clasp to your bosom their wives and daughters." Ghengis Khan IIOY??? |
09-20-2009, 07:50 AM | #2 |
Senior Member
Join Date: Jul 2004
Location: Estherville, Iowa
Posts: 3,371
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Re: Parked it at the perfect time.
Nice save - glad you caught it before it blew up, you know a 383 crank is only a few dollars more than a 350 crank, right ??????
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1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 |
09-20-2009, 10:37 AM | #3 | |
The oddest Todd around
Join Date: May 2004
Location: Miami, Florida
Posts: 1,418
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Re: Parked it at the perfect time.
Quote:
Now... there is a crank with a 3.56 throw, that fits in the 350 with no modifications. (don't even have to change the rods or pistons... unless you have the block decked big time). With a .060 bore, and the 3.56 crank, that would turn a 350 into a 369... Could be kinda fun. "What motor you got?" "369." "You mean 396?" "No... 369."
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"The greatest pleasure is to vanquish your enemies and chase them before you, to rob them of their wealth and see those dear to them bathed in tears, to ride their horses and clasp to your bosom their wives and daughters." Ghengis Khan IIOY??? |
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09-20-2009, 12:04 PM | #4 |
PROJECT 7DEUCE
Join Date: Dec 2002
Location: GRANTS PASS OR
Posts: 21,608
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Re: Parked it at the perfect time.
Nice save for sure..
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GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P.. |
09-20-2009, 03:37 PM | #5 |
Registered User
Join Date: Nov 2002
Location: NM
Posts: 705
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Re: Parked it at the perfect time.
What crank has the 3.56 stroke? Is it aftermarket? Not to hijack, just never heard of that one.....
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09-21-2009, 08:43 AM | #6 | |
The oddest Todd around
Join Date: May 2004
Location: Miami, Florida
Posts: 1,418
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Re: Parked it at the perfect time.
Quote:
From my understanding, it was for people that wanted to stroke their 350, but not too much, and not with block clearance issues.
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"The greatest pleasure is to vanquish your enemies and chase them before you, to rob them of their wealth and see those dear to them bathed in tears, to ride their horses and clasp to your bosom their wives and daughters." Ghengis Khan IIOY??? |
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09-21-2009, 10:51 AM | #7 |
Old Skool Club
Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: Parked it at the perfect time.
$660 for the 3.562 stroke SCAT crank....yow! Yeah, I'm cheap-minded, too.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
09-21-2009, 12:56 AM | #8 |
70 Chevrolet=Obsession
Join Date: Jun 2009
Location: nice ca
Posts: 1,067
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Re: Parked it at the perfect time.
Moral to this story is that an odd sound usually means something. Good save Todd.
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I'm Just like my truck. Old, Ugly and Grouchy. Except my truck starts easily in the morning and doesn't smoke! IT'S NOT EASY BEING GREEN! -Kermit the frog 1970 Chevrolet C-10 Longbed Stepside : 350, Muncie M20, 3.08 GM corp. positraction Forest green exterior/light green interior(Where all my money goes) 1996 Toyota Corolla (Parts runner) |
09-21-2009, 04:27 AM | #9 |
Senior Member
Join Date: Jul 2004
Location: Estherville, Iowa
Posts: 3,371
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Re: Parked it at the perfect time.
"Different strokes for different folks" comes to mind here !
Anyway I had our block clearanced for about $75. What does a 3.56 crank cost since the 383 cranks can be had for about $150 ? Is a 3.56 still internally balanced ? You could save a few bucks there because the 383 crank requires a new balancer and flexplate.
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1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 |
09-21-2009, 08:40 AM | #10 | |
The oddest Todd around
Join Date: May 2004
Location: Miami, Florida
Posts: 1,418
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Re: Parked it at the perfect time.
Quote:
3.562 stroke crank at Summitracing.com
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"The greatest pleasure is to vanquish your enemies and chase them before you, to rob them of their wealth and see those dear to them bathed in tears, to ride their horses and clasp to your bosom their wives and daughters." Ghengis Khan IIOY??? |
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09-21-2009, 03:55 PM | #11 |
The oddest Todd around
Join Date: May 2004
Location: Miami, Florida
Posts: 1,418
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Re: Parked it at the perfect time.
Tis one of the reasons I haven't stroked my motor yet...
Truthfully though... I'd rather turn a 400 into a high revving 377, than make a torquey 383. I like it when a motor screams. Hmm... wonder what a 400 would be if you put say a... 3.25 stroke crank (from a 307 / 327) in it... Let's see... say we bore the 400 0.030 over... that would give us a 4.155 bore half of that is roughly... 2.0775, so that is the radius. M'kay... 3.14(pie)x2.0775 squared gives us... 13.5522596 as the area of the bore... 13.5522596x3.25(stroke) gives us... 44.04484378... which is the total volumn of the cynlinder... and since there is 8... 44.04484378x8=352... That would be one hell of a high revving 352. Should expect (with roller cam and rockers, and everything perfectly balanced) at least 8000 to 9000 rpms... Should sound like a banshee screaming. ... wouldn't be worth a crap from a standstill... but once out on the highway it would fly.
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"The greatest pleasure is to vanquish your enemies and chase them before you, to rob them of their wealth and see those dear to them bathed in tears, to ride their horses and clasp to your bosom their wives and daughters." Ghengis Khan IIOY??? |
09-21-2009, 04:00 PM | #12 |
The oddest Todd around
Join Date: May 2004
Location: Miami, Florida
Posts: 1,418
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Re: Parked it at the perfect time.
Doing further math on that... (because I freaking can!)
A 352 doing 9000 rpms would need... 352x9000=3168000 3168000/3456=916.6 916.6@80%(because no motor runs at 100% efficiency)=733... Well what do ya' know... the first 350 small block that would ACTUALLY REQUIRE a 750 cfm carb. Though of course if I were to be building that, I would also cam it and have some darn good heads on it... which would actually get me closes to 100%... so I would probably run an 850 cfm carb on it.
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"The greatest pleasure is to vanquish your enemies and chase them before you, to rob them of their wealth and see those dear to them bathed in tears, to ride their horses and clasp to your bosom their wives and daughters." Ghengis Khan IIOY??? |
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