327 motor
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1st Gear
Joined: Apr 2008
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327 motor
I have a 327 numbers is 3914678 the guy told me it came out of a 68 corvette. Could anyone tell me more about the motor and the horsepower it puts out? He said it has 58cc heads on it? any help would be great Thanks Mark
Race Director
Joined: Dec 2006
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From: West Chester OH
2020 C6 of the Year Finalist - Unmodified
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St. Jude Donor '08 thru '13
There should be some numbers stamped on the block on the right side just in front of the head. Post those, the 3914678 is the casting number. The stamped numbers tell where it was used.
Burning Brakes
Joined: Dec 2003
Posts: 1,004
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From: Adelaide South Australia
Don't know how accurate these sheets are.....
but
http://rowleycorvette.com/stats68.html
this shows the casting as a 68 327 corvette.....
That's all the casting number can tell you.
It could have been a base 300HP motor, or the 350 hp option fitted with manual trans cars .
Check the engine stamp.... HT suffix will indicate it was a 350hp model
Good news is it should be the large journal crank version of the 327.
but
http://rowleycorvette.com/stats68.html
this shows the casting as a 68 327 corvette.....
That's all the casting number can tell you.
It could have been a base 300HP motor, or the 350 hp option fitted with manual trans cars .
Check the engine stamp.... HT suffix will indicate it was a 350hp model
Good news is it should be the large journal crank version of the 327.
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
the 68 327 is a one hit wonder so to speak
It is a large journal 327, as the block uses the same journal size as the 350 in preparation for that motor the following year. it is unique because the the crank and pistons are specific to this block only.
the 327 came in two flavors , the base 300 horse motor and the 350 version
327 L48 (base) 1 x 4bbl 10:1 300 @ 5000 360 @ 3400
327 L79 1 x 4bbl 11:1 350 @ 5800 360 @ 3600
Engine codes
HE 327 Base 300 Rochester Q-jet & Manual Transmission
HO 327 Base 300 Rochester Q-jet & Turbo Hydra-Matic
HP 327 Base 300 Rochester Q-jet, A/C, P/S & Manual Transmission
HT 327 L79 350 Rochester Q-jet, Special Cam & 4-Speed
Block
3914660 327 300 Horsepower (early, unverified)
3914678 327 300 & 350 Horsepower
heads
3917291 300, 350 Horsepower 327 Cubic-Inch Engines
3917292 350 Horsepower 327 Cubic-Inch Engine
This is a great littel motor, loves the RPMs, and cane be built for lots of fun, remember, this is what racers used back in the day and and has lots of potential for street fun.
the 58 cc heads sounds off though as I beleive both version had 64 cc heads the difference being in valse size withthe 350 having the 2.02 heads
Ive got one in mine
Cheers
tim
It is a large journal 327, as the block uses the same journal size as the 350 in preparation for that motor the following year. it is unique because the the crank and pistons are specific to this block only.
the 327 came in two flavors , the base 300 horse motor and the 350 version
327 L48 (base) 1 x 4bbl 10:1 300 @ 5000 360 @ 3400
327 L79 1 x 4bbl 11:1 350 @ 5800 360 @ 3600
Engine codes
HE 327 Base 300 Rochester Q-jet & Manual Transmission
HO 327 Base 300 Rochester Q-jet & Turbo Hydra-Matic
HP 327 Base 300 Rochester Q-jet, A/C, P/S & Manual Transmission
HT 327 L79 350 Rochester Q-jet, Special Cam & 4-Speed
Block
3914660 327 300 Horsepower (early, unverified)
3914678 327 300 & 350 Horsepower
heads
3917291 300, 350 Horsepower 327 Cubic-Inch Engines
3917292 350 Horsepower 327 Cubic-Inch Engine
This is a great littel motor, loves the RPMs, and cane be built for lots of fun, remember, this is what racers used back in the day and and has lots of potential for street fun.
the 58 cc heads sounds off though as I beleive both version had 64 cc heads the difference being in valse size withthe 350 having the 2.02 heads
Ive got one in mine
Cheers
tim
Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
To the poster - 30 years ago most every small block being sold all claimed to be out of Corvette
Because they brought extra money. If it does not have a forged crank, 4 bolt block, double hump heads..... I would not put a dime in small ci motors
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Le Mans Master
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From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I can't verify that my 4 bolt large journal 327 was built together. I thought that it was. It was a 1968 forged crank and the block casting date was 68. They were sought after because of the large journals. I used it in my old circle track car. It was a 500 cfm two barrel limit class and bored out 327s could do about 800 - 1000 more rpm than a 355 or 358 ci motor. The two barrels were like a restrictor plate.
Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
3951130 327ci steel large
3914672 327ci steel large
