input for 383 build
Thread Starter
Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
input for 383 build
Helping out selecting pieces for engine build-ups seems to be a favorite topic here, so I thought I'd tap into this vast reserve of knowledge for some guidence. So far, I've got a roller block, with the rotating assembly and KB .030 flattops on the way. Now for the fun part....
Parts on the wish list so far are:
Comp Cams #08-450-8 286drgs, 230 @ .050, .560 lift
Dart pro 1 heads #11421112 72cc chamber, 200cc runner, 2.02/1.60 valves
Edelbrock RPM air-gap
Holley 750
I haven't bought any of these parts yet, so nows the time to make any adjustments to the list. We get 92 octane gas here, so any combo has to be compatible(reason for thinking 72cc's). Let's hear your advice, all input welcome!
BTW, engine will go into a 68 coupe, 200-R4 trans/2200 stall, 3:73 gears
Parts on the wish list so far are:
Comp Cams #08-450-8 286drgs, 230 @ .050, .560 lift
Dart pro 1 heads #11421112 72cc chamber, 200cc runner, 2.02/1.60 valves
Edelbrock RPM air-gap
Holley 750
I haven't bought any of these parts yet, so nows the time to make any adjustments to the list. We get 92 octane gas here, so any combo has to be compatible(reason for thinking 72cc's). Let's hear your advice, all input welcome!
BTW, engine will go into a 68 coupe, 200-R4 trans/2200 stall, 3:73 gears
Le Mans Master
Joined: Jul 2005
Posts: 5,752
Likes: 4
From: Austin Texas
I wish I had used an engine build program like "Dyno-Sym" or "Engine Anaylizer Pro" before I built mine. Now I am in the process of making changes. Down-load the demo version of Engine Analyzer and try it. It will teach you about how engines work and perhaps save you some money...
http://www.performancetrends.com/EA30.htm
http://www.performancetrends.com/EA30.htm
Le Mans Master
Joined: Apr 2000
Posts: 7,562
Likes: 9
From: B'Ville NY
Cruise-In III Veteran
St. Jude Donor '05
AFR 195cc Street Heads
9.5 to 1 Compression
1 3/4” Headers
AFR FloPower RPM #5028 and 0-4779 750 cfm Holley Carb
Comp Cams Hydraulic Roller Cam #12-433-8
MSD Distributor 36° Timing
93° Octane Pump Gas
Pay no attention to the right dyno chart, these parts are for the left dyno chart
9.5 to 1 Compression
1 3/4” Headers
AFR FloPower RPM #5028 and 0-4779 750 cfm Holley Carb
Comp Cams Hydraulic Roller Cam #12-433-8
MSD Distributor 36° Timing
93° Octane Pump Gas
Pay no attention to the right dyno chart, these parts are for the left dyno chart
Drifting
Joined: Jul 2002
Posts: 1,943
Likes: 1
From: Rosemount MN
My engine is in the shop right now, getting similiar parts, the engine dyno is scheduled for next Thursday a.m.
Stock L-82 block, stroked to 383, Dart Pro 1 heads 180cc intake port 11121112, 64cc heads, Comp 12-432-8 or XR282HR-10 cam (retro roller), Comp Pro Magnum roller rockers, Dart Kool Kan intake (similiar to Edelbrock Air Gap, no longer available), a few other goodies.
I'll post the dyno results as soon as I get them.
Stock L-82 block, stroked to 383, Dart Pro 1 heads 180cc intake port 11121112, 64cc heads, Comp 12-432-8 or XR282HR-10 cam (retro roller), Comp Pro Magnum roller rockers, Dart Kool Kan intake (similiar to Edelbrock Air Gap, no longer available), a few other goodies.
I'll post the dyno results as soon as I get them.
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Intermediate
Joined: Oct 2005
Posts: 41
Likes: 0
From: NC
I went with the AFR 195 heads. They are the 74 cc strait plug style. For pistons I used the JE - SRP forged flat tops with the two valve relieve.
I decked the block taking .020 off leaving the pistons .005 down in the hole.
I decked the block taking .020 off leaving the pistons .005 down in the hole.
Thread Starter
Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
Looks like the AFR's and dual pattern cams suggested would be a better choice than what I had in mind. With the 68cc chamber AFR head, what kind of compression will I get using a flattop piston(KB100030-8, 7cc in the valve reliefs)? CR is my main concern now, as I don't care to be the first on my block to have a diesel Corvette! Thanks for all the help guys, I'm sure glad I found this forum! 
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
Originally Posted by Redshark6974
I have a very similar build as yours...i'm running a 236/242 roller cam..very streetable..very nice cam...probably yield you more power than that single pattern cam.
Intermediate
Joined: Oct 2005
Posts: 41
Likes: 0
From: NC
"With the 68cc chamber AFR head, what kind of compression will I get using a flattop piston(KB100030-8, 7cc in the valve reliefs)?"
I'm comming up with 10.45 using:
.038 gasket
-7 cc pistons
68 cc heads
0 deck height clearance
If you go with standard deck height of .025" it will be 9.89
.038 gasket
-7 cc pistons
68 cc heads
.025 deck height clearance
I used Engine analyzer to get these mesurements.
Good luck.
I'm comming up with 10.45 using:
.038 gasket
-7 cc pistons
68 cc heads
0 deck height clearance
If you go with standard deck height of .025" it will be 9.89
.038 gasket
-7 cc pistons
68 cc heads
.025 deck height clearance
I used Engine analyzer to get these mesurements.
Good luck.
Team Owner
Joined: Feb 2003
Posts: 30,183
Likes: 313
From: Lake Norman NC
Originally Posted by 79VetteMike
I have a very similar cam for my 396SBC build. I have some 200cc Aluminum Pro Topline heads that I'm doing alot of work on. Do you have any dyno numbers? How does it sound?