Block for 383 build
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
http://sdparts.com/details/gm-perfor...parts/88962516
These are brand new from GM and accept a factory type roller cam. If you don't want to spring for the Dart SHP this is a good option. GM says maximum bore 4.080.
These are brand new from GM and accept a factory type roller cam. If you don't want to spring for the Dart SHP this is a good option. GM says maximum bore 4.080.
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
http://sdparts.com/details/gm-perfor...parts/88962516
These are brand new from GM and accept a factory type roller cam. If you don't want to spring for the Dart SHP this is a good option. GM says maximum bore 4.080.
These are brand new from GM and accept a factory type roller cam. If you don't want to spring for the Dart SHP this is a good option. GM says maximum bore 4.080.
We have used quite a few of those blocks over the years and the 10105123 was a good block till they started making them in Mexico same with the other 4 bolt main block.
And we had some of those new blocks that did not pass a sonic test and did send them back and they were replaced with no problem.
GM blocks still have to be checked even if they are new!!
Thread Starter
Racer
Joined: Sep 2008
Posts: 353
Likes: 0
From: West Point MS
http://sdparts.com/details/gm-perfor...parts/88962516
These are brand new from GM and accept a factory type roller cam. If you don't want to spring for the Dart SHP this is a good option. GM says maximum bore 4.080.
These are brand new from GM and accept a factory type roller cam. If you don't want to spring for the Dart SHP this is a good option. GM says maximum bore 4.080.
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
The cam bearings should be removed while doing this work and GM line bores there cam bearings and sometimes when installing new ones the cam may not fit.
Now you have shipping, decking, boring and plate honing if you want a good job. remove cam bearings now how much do you tied up.
For a few more bucks you can buy a Dart SHP block all machined!!!
Drifting
Joined: Mar 2007
Posts: 1,936
Likes: 1
From: Winston-Salem NC
cranks..
Callies Compstar Crankshaft, Small Block Chevy 3.875 stroke, 350 mains, 2.100 rod journal
http://www.cnc-motorsports.com/produ...69&CtgID=26753
Callies Compstar Crankshaft, Small Block Chevy 4.000 stroke, 350 mains, 2.100 rod journal
http://www.cnc-motorsports.com/produ...71&CtgID=26753
Competition Rotating Assembly Kit, 3.875 Callies Crank, 6.000 Compstar Rods, JE 9.7:1 Pistons, Chevy 396 SBC
http://www.cnc-motorsports.com/produ...23&CtgID=28766
http://www.cnc-motorsports.com/produ...69&CtgID=26753
Callies Compstar Crankshaft, Small Block Chevy 4.000 stroke, 350 mains, 2.100 rod journal
http://www.cnc-motorsports.com/produ...71&CtgID=26753
Competition Rotating Assembly Kit, 3.875 Callies Crank, 6.000 Compstar Rods, JE 9.7:1 Pistons, Chevy 396 SBC
http://www.cnc-motorsports.com/produ...23&CtgID=28766
Last edited by eagle275; Jan 3, 2011 at 10:50 PM. Reason: add
Thread Starter
Racer
Joined: Sep 2008
Posts: 353
Likes: 0
From: West Point MS
Here is the response I got back from Summit when I emailed them asking for more specifics on the 383 block they have for sale.
THESE ARE FULLY MACHINED 96-00 GM 350 4 BOLT MAI
.
CNC CLEARANCED FOR A 3.75" CRANK AND H-BEAM ROD
CAM BEARINGS INSTALLED AND LINE HONED FOR TRUE C
PIPE PLUGS INSTALLED
CNC BORED .030 OVER
TORQUE PLATE HONED
CNC DECKED SURFACE
CNC LINE HONED MAINS
BRASS FREEZE PLUGS INSTALLED
PROVISION FOR MECHANICAL FUEL PUMP HOLE
FINAL WASHED AND RUST PROTECTANT APPLIED
SUM-150122 DOWEL PIN KIT W/CAM PLUG Installed
PAINTED BLACK
The cylinder bore surface finish allows moly and chrome
rings, surface finish is 0.3 a 0.7 µm Ra ( 12 a 28µin Ra).
`
Block is decked to be flat and square -----
Minimum deck height would be 9.013"
THESE ARE FULLY MACHINED 96-00 GM 350 4 BOLT MAI
.
CNC CLEARANCED FOR A 3.75" CRANK AND H-BEAM ROD
CAM BEARINGS INSTALLED AND LINE HONED FOR TRUE C
PIPE PLUGS INSTALLED
CNC BORED .030 OVER
TORQUE PLATE HONED
CNC DECKED SURFACE
CNC LINE HONED MAINS
BRASS FREEZE PLUGS INSTALLED
PROVISION FOR MECHANICAL FUEL PUMP HOLE
FINAL WASHED AND RUST PROTECTANT APPLIED
SUM-150122 DOWEL PIN KIT W/CAM PLUG Installed
PAINTED BLACK
The cylinder bore surface finish allows moly and chrome
rings, surface finish is 0.3 a 0.7 µm Ra ( 12 a 28µin Ra).
`
Block is decked to be flat and square -----
Minimum deck height would be 9.013"
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I would not bore a new block, there are not many pistons made for a 427ci small block but I found some from Mahle that were 4.125" which is standard bore size for 400ci block I would imagine it would be pretty easy to find 4.00" pistons for a 350ci block geese what is sense of boring a new block .030" over 
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Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
Here is the response I got back from Summit when I emailed them asking for more specifics on the 383 block they have for sale.
THESE ARE FULLY MACHINED 96-00 GM 350 4 BOLT MAI
.
CNC CLEARANCED FOR A 3.75" CRANK AND H-BEAM ROD
CAM BEARINGS INSTALLED AND LINE HONED FOR TRUE C
PIPE PLUGS INSTALLED
CNC BORED .030 OVER
TORQUE PLATE HONED
CNC DECKED SURFACE
CNC LINE HONED MAINS
BRASS FREEZE PLUGS INSTALLED
PROVISION FOR MECHANICAL FUEL PUMP HOLE
FINAL WASHED AND RUST PROTECTANT APPLIED
SUM-150122 DOWEL PIN KIT W/CAM PLUG Installed
PAINTED BLACK
The cylinder bore surface finish allows moly and chrome
rings, surface finish is 0.3 a 0.7 µm Ra ( 12 a 28µin Ra).
`
Block is decked to be flat and square -----
Minimum deck height would be 9.013"
THESE ARE FULLY MACHINED 96-00 GM 350 4 BOLT MAI
.
CNC CLEARANCED FOR A 3.75" CRANK AND H-BEAM ROD
CAM BEARINGS INSTALLED AND LINE HONED FOR TRUE C
PIPE PLUGS INSTALLED
CNC BORED .030 OVER
TORQUE PLATE HONED
CNC DECKED SURFACE
CNC LINE HONED MAINS
BRASS FREEZE PLUGS INSTALLED
PROVISION FOR MECHANICAL FUEL PUMP HOLE
FINAL WASHED AND RUST PROTECTANT APPLIED
SUM-150122 DOWEL PIN KIT W/CAM PLUG Installed
PAINTED BLACK
The cylinder bore surface finish allows moly and chrome
rings, surface finish is 0.3 a 0.7 µm Ra ( 12 a 28µin Ra).
`
Block is decked to be flat and square -----
Minimum deck height would be 9.013"
Torque plate honed with what gasket and which hardware as we see it does make a differance between different gaskets and if you are using a studs or bolts.
You don't line hone cam bearings!!!!
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I would not bore a new block, there are not many pistons made for a 427ci small block but I found some from Mahle that were 4.125" which is standard bore size for 400ci block I would imagine it would be pretty easy to find 4.00" pistons for a 350ci block geese what is sense of boring a new block .030" over
When you buy these higher end $2000+ dollar blocks for building 427 - 472 ci what is another $100 to get the 4.155 bore and an additional 7 ci.Lets just say that extra 7 ci gained you 10 hp. That is very cheap dollars per HP.
I have a 434 and I wished I had built a 447 ci for the same price. 4.155 X 4.125
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I totally disagree Wayne When you buy these higher end $2000+ dollar blocks for building 427 - 472 ci what is another $100 to get the 4.155 bore and an additional 7 ci.
Lets just say that extra 7 ci gained you 10 hp. That is very cheap dollars per HP.
I have a 434 and I wished I had built a 447 ci for the same price. 4.155 X 4.125
When you buy these higher end $2000+ dollar blocks for building 427 - 472 ci what is another $100 to get the 4.155 bore and an additional 7 ci.Lets just say that extra 7 ci gained you 10 hp. That is very cheap dollars per HP.
I have a 434 and I wished I had built a 447 ci for the same price. 4.155 X 4.125
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
$652 sum-150100
if the machinework is decent, then that's a good value for this (what the OP says is planned).
I'd suggest the GMPP 3.8" crank or similar 3.8" for this. FYI , the GMPP 383 also has specially clearanced rods unique to 383. For this, also suggest scat or eagle I-beam rods w/ the smaller capscrews. For this, typical H-beam is overkill, big, & needs more clearance than I-beam.
years back I built a 388" from an early 70s 2 pc rms 350 block. thirty overbore & scat 9000 cast 3.800" crank & self-clearanced old GM 5.7 rods, & get-em-anywhere pistons w/ 1.425" CH made 388" and created instant near-zero deck. Near-zero deck could also be accomplished w/ 3.8" w/ 6" rods & rather common 1.125" CH pistons.
if the machinework is decent, then that's a good value for this (what the OP says is planned).
I'd suggest the GMPP 3.8" crank or similar 3.8" for this. FYI , the GMPP 383 also has specially clearanced rods unique to 383. For this, also suggest scat or eagle I-beam rods w/ the smaller capscrews. For this, typical H-beam is overkill, big, & needs more clearance than I-beam.
years back I built a 388" from an early 70s 2 pc rms 350 block. thirty overbore & scat 9000 cast 3.800" crank & self-clearanced old GM 5.7 rods, & get-em-anywhere pistons w/ 1.425" CH made 388" and created instant near-zero deck. Near-zero deck could also be accomplished w/ 3.8" w/ 6" rods & rather common 1.125" CH pistons.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
heck ... just under $3K buys a complete roller vortec motor from Year One and it makes about 400-415 hp.
here
http://forums.corvetteforum.com/1576432104-post7.html
here
http://forums.corvetteforum.com/1576432104-post7.html
Last edited by jackson; Jan 6, 2011 at 09:45 AM.
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
