a 383 question?
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Originally Posted by 85vet
Simple - 350 block bored out .030 with a 400 crank.
It is a torque monster
It is a torque monster
Makes for a fun ride. I will never build a 350 again. If starting from scratch, same money to build a 383. The torque comes from the additional stroke. 350 uses a 3.48 stroke, 400 uses a 3.75 stroke.
Team Owner
Joined: Sep 2001
Posts: 62,146
Likes: 1,730
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Its just a block thats been machined out .030" in the cylinders, and has a larger stroke crankshaft installed.
Le Mans Master
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
Here's a little more info that might help, funny enough Pete and 85 both posted in this too.
They are good guys to listen to, and hopefully in a few days here. I can agree with them on 383s being a blast!
They are good guys to listen to, and hopefully in a few days here. I can agree with them on 383s being a blast!
Burning Brakes
Joined: Dec 2003
Posts: 1,183
Likes: 1
From: MidOhio
Originally Posted by 85vet
Simple - 350 block bored out .030 with a 400 crank.
It is a torque monster
It is a torque monster
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Originally Posted by tonymax2
If a 383 is a "torque monster", what is a 400(+.020)SB with Vortec heads, hi-rise dual plane, 800 CFM Quadrajet (modified) and a mid-range cam?
Looking for a gas station
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Melting Slicks
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
Originally Posted by USAsOnlyWay
Here's a little more info that might help, funny enough Pete and 85 both posted in this too.
They are good guys to listen to, and hopefully in a few days here. I can agree with them on 383s being a blast!
They are good guys to listen to, and hopefully in a few days here. I can agree with them on 383s being a blast!
Drifting
Joined: May 2004
Posts: 1,543
Likes: 1
From: Levittown NY
Le Mans Master
Joined: Oct 2004
Posts: 6,314
Likes: 508
From: South-central Missouri
A grouch on cold days, I recon
Originally Posted by tonymax2
If a 383 is a "torque monster", what is a 400(+.020)SB with Vortec heads, hi-rise dual plane, 800 CFM Quadrajet (modified) and a mid-range cam?
. Once it fired it was OK tho. I got MAYBE 12 mpg w/ it 'round town, but it did make that El Camino scoot! 
But! my plain jane LT1 C4 coupe would eat that bad boy alive today.
P.
Le Mans Master
Joined: Mar 2002
Posts: 5,889
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From: Castro Valley Calif.
St. Jude Donor '03 thru '26
Originally Posted by 85vet
Simple - 350 block bored out .030 with a 400 crank.
It is a torque monster
It is a torque monster
Edit: If you use a factory block as a foundation that is.............
Last edited by Caboboy; Jul 17, 2005 at 10:55 AM.
Melting Slicks
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
Originally Posted by Caboboy
Here's something to consider as well. A 383 (4.030 x 3.75) and a 421 (4.155 x 3.875) have virtually the same bore/stroke ratio. Talk about a friggin' torque monster........wowie! The difference in cost really only boils down to the retrofit cam stuff and a bit more $ in the rotating assembly
Edit: If you use a factory block as a foundation that is.............
Edit: If you use a factory block as a foundation that is.............
