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02-12-2016, 02:47 PM
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#1 |
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Registered User
Join Date: Jan 2004
Location: Whitehorse YK Canada
Posts: 2,651
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Re: Factory big block trucks?
Ok, I just googled 1968 L66 and found this BC licence plate on eBay.
 I had to buy it......
__________________
Blaine 59 GMC 9314 a.k.a. Whoopee 68 C20 50th Anniversary a.k.a. The Rat http://www.flickr.com/photos/northerngmc/ http://www.members.tripod.com/P-wee/index_032.htm 1.61803 is one H of a lot better than 3.14159, no really it is! |
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02-15-2016, 09:07 AM
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#2 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,740
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Re: Factory big block trucks?
My guess is you are seeing the limits of 350 cfm on a 400 cubic inch motor. The 2 bbl engine is just out of fuel at a much lower rpm than the 4 bbl motor. And based on GM's ratings, to the tune of 50 hp.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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02-15-2016, 04:51 PM
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#3 |
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Who Changed This?
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,990
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Re: Factory big block trucks?
I've seen plenty of big blocks with 2 barrel carbs, I worked for a Chevy dealer on and off from 1970-1972. I'd suspect that the cam would be different between the two barrel and 4 barrel, but have no proof. I've even seen 421 Pontiacs with a 2 barrel. Our body shop manager had a '68 Star Chief that got 20 MPG on the open road with that setup. Beasts like that had tons of torque, and even the big cars had tall axles.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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02-15-2016, 07:46 PM
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#4 | |
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Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,334
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Re: Factory big block trucks?
Quote:
I bet that's some seriously crisp throttle response though!
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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02-15-2016, 05:00 PM
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#5 | |
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Stalker Nate
Join Date: Dec 2010
Location: Langley, BC, Canada
Posts: 1,556
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Re: Factory big block trucks?
Quote:
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1957 GMC SWB stepper modified summer time driver 1963 Chevy Fire Dept. Command Center Van 2 ton - future food vending truck project 1965 Chevy P10 Ice Cream Truck project Instagram - TheDonutDiner FaceBook - @UscreamIscream |
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02-15-2016, 07:27 PM
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#6 | |
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Registered User
Join Date: Jan 2004
Location: Whitehorse YK Canada
Posts: 2,651
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Re: Factory big block trucks?
Quote:
__________________
Blaine 59 GMC 9314 a.k.a. Whoopee 68 C20 50th Anniversary a.k.a. The Rat http://www.flickr.com/photos/northerngmc/ http://www.members.tripod.com/P-wee/index_032.htm 1.61803 is one H of a lot better than 3.14159, no really it is! |
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