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Old 11-17-2013, 06:22 PM   #1
62k10&84k20burb
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Huge i6 in Coe trucks

I've head a bit about the huge i6 gas motors like the 426, 503, and 707. Anyone have any info?
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Old 11-17-2013, 08:54 PM   #2
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Re: Huge i6 in Coe trucks

The v6 was a 305, the v12 was a 707 im not sure about the others
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Old 11-17-2013, 09:04 PM   #3
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Re: Huge i6 in Coe trucks

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The v6 was a 305, the v12 was a 707 im not sure about the others
305, 351, 401 and 478 V6s, 702 V12. Here.
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Old 11-17-2013, 11:08 PM   #4
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Re: Huge i6 in Coe trucks

yes, ^^^that^^^ i would love to have one of those v-12s!
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Old 11-17-2013, 11:51 PM   #5
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Re: Huge i6 in Coe trucks

I believe 62 was talking about the era just before the V6 and V12's showed up. I also believe that some of these big inch engines weren't built by GM.
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Old 11-18-2013, 05:16 AM   #6
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Re: Huge i6 in Coe trucks

Here is a picture of a V-12 for you.
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Old 11-18-2013, 05:44 AM   #7
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Re: Huge i6 in Coe trucks

707 started around 1936 and was a bus engine. 426 and 503 were in the COE's and started in the 40's to early 50's.
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Old 11-18-2013, 10:44 AM   #8
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Re: Huge i6 in Coe trucks

We had a pretty good conversation going about the Early Big 6's on Stovebolt.com a year or two back. It was on the Big Bolts forum if anyone tries to research it.

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Old 11-20-2013, 04:41 PM   #9
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Re: Huge i6 in Coe trucks

Was the 702 V-12 basically two back to back 351 V-6 engines?
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Old 11-20-2013, 06:15 PM   #10
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Re: Huge i6 in Coe trucks

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Was the 702 V-12 basically two back to back 351 V-6 engines?
Pretty much, 2 intakes, 2 distributors and 4 heads.
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Old 11-20-2013, 08:30 PM   #11
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Re: Huge i6 in Coe trucks

http://www.jalopyjournal.com/forum/s...d.php?t=283473 check this out.
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Old 11-20-2013, 09:43 PM   #12
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Re: Huge i6 in Coe trucks

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Originally Posted by rkn463 View Post
Pretty much, 2 intakes, 2 distributors and 4 heads.
it had one distributor with two caps, 4 heads 2 intakes 1 block one crank one cam
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Old 11-21-2013, 03:30 PM   #13
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Re: Huge i6 in Coe trucks

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it had one distributor with two caps, 4 heads 2 intakes 1 block one crank one cam
That's interesting. I guess the rotors were gear driven off the same shaft? Talk about a long cam and crank.
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