What size is a SBC 400 bored +.020?
03-13-2005, 07:19 PM
#1
Member
Thread Starter
Join Date: Feb 2005
Location: Mid-Missouri
Posts: 124
Likes: 0
Received 0 Likes
on
0 Posts
Car: '98 Durango, '77 Vette
What size is a SBC 400 bored +.020?
Here's one for any of you number crunchers out there who know how to figure out an engine's new cubic inches measurment and literage. It's a SBC 400, bored +.020, with stock crank and stock rods. I would like to know what it is now, since it used to be a 6.6 liter 400. Thanks guys...
03-15-2005, 10:33 AM
#4
Supreme Member
iTrader: (4)
Join Date: Oct 1999
Location: GO PACK GO
Posts: 4,211
Likes: 0
Received 2 Likes
on
2 Posts
Car: 83Z28 HO
Engine: Magnacharged Dart Little M 408
Transmission: G Force 5 speed
Axle/Gears: Moser 9" w/Detroit Trutrac
What?!?? You mean it's STILL A 400!?!! It didn't magically change into something else?
Quit boring your engines out and buying stroker cranks...it'll still be a 400....
Quit boring your engines out and buying stroker cranks...it'll still be a 400....
Last edited by Confuzed1; 03-15-2005 at 10:36 AM.
03-15-2005, 02:45 PM
#5
Moderator
iTrader: (14)
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,169
Likes: 0
Received 36 Likes
on
34 Posts
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Originally posted by RB83L69
It had 401.6 CI before it was bored; now it has 404.8.
It had 401.6 CI before it was bored; now it has 404.8.
Using 3.1415926535898 for pi, and 3.75" stroke.
03-15-2005, 08:20 PM
#6
Member
Thread Starter
Join Date: Feb 2005
Location: Mid-Missouri
Posts: 124
Likes: 0
Received 0 Likes
on
0 Posts
Car: '98 Durango, '77 Vette
Yeah I actually was planning on stroking...or de-stroking the engine. My plan was to drop a 350 crank in the 400, making a 377. The goal for that combo was not just a size or power thing, but I thought a 377 in a '77 Vette would be novel. When I got around to it, I decided instead to just leave it a 400. Then I found that rust had taken it's toll on the cylinder walls, and needed to be bored over. The machine shop understands that sometimes less is more, so they bored it +.020 instead of the more common +.030. I'll round the CI to 404, but I was still wondering what the literage would be. Maybe a 6.7, or is it still in the realm of 6.6? Thanks guys...
03-16-2005, 04:25 AM
#7
Supreme Member
iTrader: (13)
Join Date: Dec 2002
Location: Bowdon, GA.
Posts: 2,535
Likes: 0
Received 16 Likes
on
14 Posts
Car: 1988 Camaro
Engine: 355, 10.34:1, 249/252 @.050", IK200
Transmission: TH-400, 3500 stall 9.5" converter
Axle/Gears: Ford 9", detroit locker, 3.89 gears
Stock un bored 400 is......
400.9212 cubic inches
6.569921 Liter
bored .020" over puts it at....
404.8183 cubic inches
6.633784 Liter
400.9212 cubic inches
6.569921 Liter
bored .020" over puts it at....
404.8183 cubic inches
6.633784 Liter
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
12-10-2019 07:07 PM
1Aauto
Sponsored Vendors
0
09-02-2015 01:35 PM
