« previous next »
Pages: 1 [2] 3 4 ... 7   Go Down

Author Topic: 383  (Read 41253 times)

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19192
Re: 383
« Reply #15 on: December 25, 2008, 09:21:50 am »
If the engine was bored .060 over you would have 388 CID

(½ bore)² x π x stroke x # of cylinders = CID

example 4.030 bore ÷ 2 = 2.015 to the second power = 2.015 x 2.015 = 4.060225

4.060225 x 3.14 (pi) = 12.749106

12.749106 x stroke 3.75 = 47.809147

47.809147 x 8 cylinders = 382.47317

383 CID
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline hotrod24

  • Senior Member
  • ****
  • Posts: 1696
Re: 383
« Reply #16 on: December 25, 2008, 02:35:01 pm »
i know it is suppost to be a 383 from a 350 but i dont know what it was bored so i am just going to tear it down and see what the shop thinks because i have no idea ;D
Logged
1980 1/2 ton shortbed project...
1978 pontiac grand prix...

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19192
Re: 383
« Reply #17 on: December 25, 2008, 03:57:37 pm »
standard bore is 4"

typical oversizes are .030", .040", .060"

.030" = 383 with 3.75 stroke
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline hotrod24

  • Senior Member
  • ****
  • Posts: 1696
Re: 383
« Reply #18 on: December 25, 2008, 04:28:45 pm »
so could i build a 396?
« Last Edit: December 25, 2008, 04:36:41 pm by hotrod24 »
Logged
1980 1/2 ton shortbed project...
1978 pontiac grand prix...

Offline frogman68

  • Junior Member
  • ***
  • Posts: 773
Re: 383
« Reply #19 on: December 25, 2008, 04:38:12 pm »
Quote from: hotrod24 on December 25, 2008, 04:28:45 pm
so could i build a 396?

396 is a big block 383 is a small block
Logged

Offline hotrod24

  • Senior Member
  • ****
  • Posts: 1696
Re: 383
« Reply #20 on: December 25, 2008, 04:47:00 pm »
thats what i thought just giving it try so how high could i go?
Logged
1980 1/2 ton shortbed project...
1978 pontiac grand prix...

Offline frogman68

  • Junior Member
  • ***
  • Posts: 773
Re: 383
« Reply #21 on: December 25, 2008, 04:54:33 pm »
at .060 it would be (I think) a 388
Logged

Offline hotrod24

  • Senior Member
  • ****
  • Posts: 1696
Re: 383
« Reply #22 on: December 25, 2008, 04:57:31 pm »
ok i will just wait and stick with the 383 and then put a big block in a 2wd drive
Logged
1980 1/2 ton shortbed project...
1978 pontiac grand prix...

Offline eventhorizon66

  • Senior Member
  • ****
  • Posts: 1909
Re: 383
« Reply #23 on: December 25, 2008, 05:28:17 pm »
Both 3.875" and 4" stroke cranks are available for the SBC.  With a 4.03" bore they would give you 395 cid and 408 cid, respectively.  But, I believe, at this level, stroker-profiled cap-screw type rods and a small-base circle cam become mandatory for clearance.  Also, rod/stroke ratios become quite low (for an SBC) with these strokes, which really doesn't mean much for a mild street engine other than marginally increased piston side-loading and bore wear.
« Last Edit: December 25, 2008, 05:31:05 pm by eventhorizon66 »
Logged
'85 C10 SWB 350 700R4 TKO600

Offline hotrod24

  • Senior Member
  • ****
  • Posts: 1696
Re: 383
« Reply #24 on: January 09, 2009, 02:14:15 pm »
what is the differents in a 350 and 383 what parts would i need for the 383?
Logged
1980 1/2 ton shortbed project...
1978 pontiac grand prix...

Offline frogman68

  • Junior Member
  • ***
  • Posts: 773
Re: 383
« Reply #25 on: January 09, 2009, 02:18:55 pm »
Quote from: hotrod24 on January 09, 2009, 02:14:15 pm
what is the differents in a 350 and 383 what parts would i need for the 383?


350 has 4.000 piston's 383 has 4.030 pistons
350 has a 350 crank
383 has a 400 crank

Think that about covers it. Some internal work needs to be done for rod clearance too
Logged

Offline hotrod24

  • Senior Member
  • ****
  • Posts: 1696
Re: 383
« Reply #26 on: January 09, 2009, 02:37:52 pm »
ok i was just wanting to know because i am going to get a rebuild book and i did not know if i should get it for a 350 or a 383
Logged
1980 1/2 ton shortbed project...
1978 pontiac grand prix...

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19192
Re: 383
« Reply #27 on: January 09, 2009, 02:47:46 pm »
It's the same thing. you may have to clearance grind the connecting rods and everything will be a test fit assembly. Once you have it all together you may want to rip it all apart and have everything balanced. If you're gonna build a 383 do it right or don't do it at all imo
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline hotrod24

  • Senior Member
  • ****
  • Posts: 1696
Re: 383
« Reply #28 on: January 09, 2009, 03:12:29 pm »
i agree vile if you are not going to do something right the first time dont do it at all
Logged
1980 1/2 ton shortbed project...
1978 pontiac grand prix...

Offline Lt.Del

  • Andy aka:SgtDel
  • Senior Member
  • ****
  • Posts: 3864
  • DelbridgePhotography.com
    • www.delbridge.net
Re: 383
« Reply #29 on: January 09, 2009, 04:34:47 pm »
since a 383 stroker uses a 400 ci crank, the flywheel/flex plate will have to be for a 400 crank, and the harmonic balancer, since that goes with the crank.

www.delbridge.net/install
Logged
Pages: 1 [2] 3 4 ... 7   Go Up
« previous next »