The 350/305 crank difference is,
12-22-2001, 08:23 PM
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Car: No more birdy
The 350/305 crank difference is,
I asked a couple of days ago about the 350 crank as replacement for the 305. (Not a stroking question, I know they are the same.)
Well after pulling the 305 (again) and putting the two cranks togather ta tat ta! The pin shaft that holds the ballancer on is located 1/4 on an inch higher than the 350's. So in conclusion and to basicly answer the question I was looking for: If you use a crank other than an exact replacment 350 for 350 or 305 for 305, use the ballancer and timing tab from the doner cranks engine.
Peace out,
SSC
Well after pulling the 305 (again) and putting the two cranks togather ta tat ta! The pin shaft that holds the ballancer on is located 1/4 on an inch higher than the 350's. So in conclusion and to basicly answer the question I was looking for: If you use a crank other than an exact replacment 350 for 350 or 305 for 305, use the ballancer and timing tab from the doner cranks engine.
Peace out,
SSC
12-22-2001, 09:25 PM
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Car: No more birdy
Originally posted by RB83L69
What were the casting numbers?
What were the casting numbers?
the one I got from my dad is: "1182"
12-22-2001, 10:32 PM
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Car: 4
Engine: 6
Transmission: 5
182 is forged, 442 is cast. They are rather different in many ways therefore. 442 is the casting in nearly all 267s & 2-piece-RMS 305s, and most of the car 350s from the 70s & 80s. Your 182 is probably from a truck (not that it makes any difference dimensionally).
Check out www.mortec.com for some casting/forging info on your parts.
You can spot the diference between a cast crank and a forged crank fairly easily: a cast one has a thin (<¼" wide) parting line, and a forged one has a much wider parting line that usually looks like it has been ground. Also, if you gently tap on them with a small piece of metal, you'll immediately notice a difference in the sound.
What "pin" do you mean? If you're talking about the Woodruff key, that's not even part of the crank, it's a separate piece of hardware you can just knock out and go to AutoZone or wherever and get a new one.
If you look closely at the relationship of that keyway on both cranks, you'll also observe that it is exactly in line with the #1 & #2 rod journal of the crank; i.e. it points exactly at the center of the #1 bore when #1 is at TDC. That means that the balancers are the same.
But your final conclusion is absolutely correct: you should use the balancer & tab together that came from a given engine. As long as they came off an internally balanced motor (262.5, 265, 267, 283, 302, 305, 307, 327, or 350) then they'll work fine as far as balance and timing indication are concerned.
Check out www.mortec.com for some casting/forging info on your parts.
You can spot the diference between a cast crank and a forged crank fairly easily: a cast one has a thin (<¼" wide) parting line, and a forged one has a much wider parting line that usually looks like it has been ground. Also, if you gently tap on them with a small piece of metal, you'll immediately notice a difference in the sound.
What "pin" do you mean? If you're talking about the Woodruff key, that's not even part of the crank, it's a separate piece of hardware you can just knock out and go to AutoZone or wherever and get a new one.
If you look closely at the relationship of that keyway on both cranks, you'll also observe that it is exactly in line with the #1 & #2 rod journal of the crank; i.e. it points exactly at the center of the #1 bore when #1 is at TDC. That means that the balancers are the same.
But your final conclusion is absolutely correct: you should use the balancer & tab together that came from a given engine. As long as they came off an internally balanced motor (262.5, 265, 267, 283, 302, 305, 307, 327, or 350) then they'll work fine as far as balance and timing indication are concerned.
12-22-2001, 10:46 PM
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Yea the keyway is what I ment. Cold + beer x 10 + engine work=
Yea the key way is located differently. not that it really matters when you set timing by vac, but I just thought It would be interesting to anyone who wanted to know.
SSC
Yea the key way is located differently. not that it really matters when you set timing by vac, but I just thought It would be interesting to anyone who wanted to know.
SSC
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