Huge i6 in Coe trucks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

62k10&84k20burb · 11-17-2013, 06:22 PM

I've head a bit about the huge i6 gas motors like the 426, 503, and 707. Anyone have any info?

meatwagon83 · 11-17-2013, 08:54 PM

The v6 was a 305, the v12 was a 707 im not sure about the others

83GMCK2500 · 11-17-2013, 09:04 PM

Quote:

Originally Posted by meatwagon83

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.

meatwagon83 · 11-17-2013, 11:08 PM

yes, ^^^that^^^ i would love to have one of those v-12s!

mrolds88 · 11-17-2013, 11:51 PM

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.

**oldiron** · 11-18-2013, 05:16 AM

Here is a picture of a V-12 for you.

mrolds88 · 11-18-2013, 05:44 AM

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.

C10 - C90 Bill · 11-18-2013, 10:44 AM

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.

Bill

studda · 11-20-2013, 04:41 PM

Was the 702 V-12 basically two back to back 351 V-6 engines?

rkn463 · 11-20-2013, 06:15 PM

Quote:

Originally Posted by studda

Was the 702 V-12 basically two back to back 351 V-6 engines?

Pretty much, 2 intakes, 2 distributors and 4 heads.

62k10&84k20burb · 11-20-2013, 08:30 PM

http://www.jalopyjournal.com/forum/s...d.php?t=283473 check this out.

meatwagon83 · 11-20-2013, 09:43 PM

Quote:

Originally Posted by rkn463

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

studda · 11-21-2013, 03:30 PM

Quote:

Originally Posted by meatwagon83

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.

11-17-2013, 06:22 PM	#1
62k10&84k20burb Registered User Join Date: Apr 2013 Location: owls head, new york Posts: 81	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?

11-17-2013, 08:54 PM	#2
meatwagon83 Registered User Join Date: Dec 2012 Location: Preble county ohio Posts: 1,914	Re: Huge i6 in Coe trucks The v6 was a 305, the v12 was a 707 im not sure about the others __________________ "DON'T TOUCH THE TRIM!!"-Early Kyler

11-17-2013, 11:08 PM	#4
meatwagon83 Registered User Join Date: Dec 2012 Location: Preble county ohio Posts: 1,914	Re: Huge i6 in Coe trucks yes, ^^^that^^^ i would love to have one of those v-12s! __________________ "DON'T TOUCH THE TRIM!!"-Early Kyler

11-17-2013, 11:51 PM	#5
mrolds88 Registered User Join Date: Jul 2011 Location: WV Posts: 946	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. __________________ 72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD

11-18-2013, 05:16 AM	#6
oldiron Designated Grumpy Old Man Join Date: Oct 2001 Location: arlington, washington usa Posts: 3,094	Re: Huge i6 in Coe trucks Here is a picture of a V-12 for you. Attached Images __________________ Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg

11-18-2013, 05:44 AM	#7
mrolds88 Registered User Join Date: Jul 2011 Location: WV Posts: 946	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. __________________ 72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD

11-18-2013, 10:44 AM	#8
C10 - C90 Bill Registered User Join Date: Nov 2001 Location: Moneta, VA USA Posts: 3,087	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. Bill __________________ '60-'72 Chev/GMC Fan GMC 9500 Fan Detroit Diesel Fan

11-20-2013, 04:41 PM	#9
studda Registered User Join Date: Oct 2013 Location: St. Clair Mo Posts: 283	Re: Huge i6 in Coe trucks Was the 702 V-12 basically two back to back 351 V-6 engines?

11-20-2013, 08:30 PM	#11
62k10&84k20burb Registered User Join Date: Apr 2013 Location: owls head, new york Posts: 81	Re: Huge i6 in Coe trucks http://www.jalopyjournal.com/forum/s...d.php?t=283473 check this out.



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