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Old 08-21-2013, 05:43 PM
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sbc 383 build

first time builder I want 450 + hp on pump gas.block is bored .30,. 5.7 rods 400 crank. what size head would I need ? I was told 210CC runner size, 64cc combustion chambers. 2.02 1.60 would be good .cam
VALVE LIFT WITH 1.5 ROCKERS : INT .530 / EXT .545DURATION IN DEGREES : - INT .286 / EXT .294DURATION @0.050" : INT .233 / EXT .241LOBE SEPARATION ANGLE : 110 . help

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Old 08-21-2013, 06:48 PM
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That's going to get you about 9.7:1 c.r., 450 hp is a pretty lofty goal for a first time motor builder, what parts do you already have and what's your budget?
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Old 08-21-2013, 06:59 PM
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If when building a 383 with a 64cc cylinder head watch your measured compression ratio.
a flat top piston w a 64cc head and a O decked block can/will result in a compression ratio that is a bit too high for pump gas and may knock.
Keep the cr under 10.50:1 ya it matters.
usually a 64cc head wants a -12C dished piston on a 383

Combine flat top 383 pistons with a 68+cc head for pump gas.

Buy a quality high perf heads with a 195cc to 210cc intake port.
If you buy the cheap chinese made head, remember you get what you pay for.
And will probabily come up short on power. Cheap is cheap.

Pretty hard to go wrong with a Profiler or a Brodix or a Dart or AFR

Do not use less than a 750cfm carb.
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Old 08-21-2013, 07:25 PM
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That is a big number for a first build, if the budget allows it then it will also be a pretty cool first build lol.
Heads, look here, 210, 64cc, 208/160, good low lift numbers for a street car that wants to go fast and at $1150 out the door its well priced
SBC 23 Degree Cylinder Heads
Intake use a edelbrock pn# 7101 performer RPM
I watched a 383 put down 441whp with this cam and less head a month ago.
http://www.summitracing.com/parts/hr...make/chevrolet
Carb, I would likely go with this
http://www.summitracing.com/parts/hly-0-82851/overview/

Even with just shy of 10:1 this should be a stout piece
Add a 3500+ stall, some 411's and hold on......
Course I do love spending someone else's money.
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Old 08-21-2013, 07:30 PM
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383 build

Ya the kit has flat top pistons i want a ****** motor thats fast with that loud n cool idle with out it blowing up
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Old 08-21-2013, 07:32 PM
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Quote:
Originally Posted by one2go View Post
Ya the kit has flat top pistons i want a ****** motor thats fast with that loud n cool idle with out it blowing up
OK, so what's the intended usage, what car? Trans? Gear?
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Old 08-21-2013, 08:06 PM
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383 build

Ya the kit has flat top pistons i want a ****** motor thats fast with that loud n cool idle with out it blowing up
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Old 08-21-2013, 08:10 PM
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OK, so what's the intended usage, what car? Trans? Gear?
street daily driver its going in a s10 for now. tran 400 maybe 4.11 or 4.56
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Old 08-21-2013, 08:25 PM
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D D use a moderate "hydraulic roller cam" Dont mess with sissy parts if you want power. I personally prefer a solid roller cam. Dont waste your time or money on a flat tappet cam.
750 CFM carb or better yet good F.I. system
good quality headers and a 3 inch dual exhaust system if you have the room.10:1 CR or close to that is a good place to start your math work. The heads should flow 275 plus CFM on the intake side. Balance and blue print the engine as best you can. we can all guide you when you answer budget question,,,,
fast and loud is the easy part
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Old 08-21-2013, 08:33 PM
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Originally Posted by vinniekq2 View Post
D D use a moderate "hydraulic roller cam" Dont mess with sissy parts if you want power. I personally prefer a solid roller cam. Dont waste your time or money on a flat tappet cam.
750 CFM carb or better yet good F.I. system
good quality headers and a 3 inch dual exhaust system if you have the room.10:1 CR or close to that is a good place to start your math work. The heads should flow 275 plus CFM on the intake side. Balance and blue print the engine as best you can. we can all guide you when you answer budget question,,,,
fast and loud is the easy part
its a older motor so I guess its got be reto parts for the cam and stuff right
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Old 08-21-2013, 09:00 PM
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Quote:
Originally Posted by one2go View Post
Ya the kit has flat top pistons i want a ****** motor thats fast with that loud n cool idle with out it blowing up
Then buy a head with a 70cc combustion chamber.
"o deck" the block and it will be just right.

Brodix IK200 (70cc) Comp cams solid roller XR286R-10 K12-772-8 "K kit"
(add pushrods and a cam button)
1.5 Scorpion rockers.
Holley 750HP Proform 750HP quickfuel 750hp
Edelbrock 750 or 800 cfm carb.
Professional Products Hurricane intake (port match to the heads.)

1-3/4" long tube headers CD ignition (MSD Crane etc)
9" 10" 3500++stall

You must verify roller cam to connecting rod bolt clearance on this build.
If a small base circle cam is required call Comp cams to order it.
Set the valve lash COLD .004" less than the cam card hot lash spec.
Enjoy

Last edited by F-BIRD'88; 08-21-2013 at 09:11 PM.
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Old 08-22-2013, 06:12 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
Then buy a head with a 70cc combustion chamber.
"o deck" the block and it will be just right.

Brodix IK200 (70cc) Comp cams solid roller XR286R-10 K12-772-8 "K kit"
(add pushrods and a cam button)
1.5 Scorpion rockers.
Holley 750HP Proform 750HP quickfuel 750hp
Edelbrock 750 or 800 cfm carb.
Professional Products Hurricane intake (port match to the heads.)

1-3/4" long tube headers CD ignition (MSD Crane etc)
9" 10" 3500++stall

You must verify roller cam to connecting rod bolt clearance on this build.
If a small base circle cam is required call Comp cams to order it.
Set the valve lash COLD .004" less than the cam card hot lash spec.
Enjoy
So how much hp do u think that setup will make
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Old 08-22-2013, 06:40 AM
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So how much hp do u think that setup will make??????
this combo should easily make the power you want while keeping the RPM civil.There is more power on the table,just depends on your budget. The heads and cam are where you look for HP.Keep in mind that at some point the extra horses will come with higher RPM.
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Old 08-22-2013, 06:49 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
Then buy a head with a 70cc combustion chamber.
"o deck" the block and it will be just right.

Brodix IK200 (70cc) Comp cams solid roller XR286R-10 K12-772-8 "K kit"
(add pushrods and a cam button)
1.5 Scorpion rockers.
Holley 750HP Proform 750HP quickfuel 750hp
Edelbrock 750 or 800 cfm carb.
Professional Products Hurricane intake (port match to the heads.)

1-3/4" long tube headers CD ignition (MSD Crane etc)
9" 10" 3500++stall

You must verify roller cam to connecting rod bolt clearance on this build.
If a small base circle cam is required call Comp cams to order it.
Set the valve lash COLD .004" less than the cam card hot lash spec.
Enjoy
So how much hp do u think that setup will make
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Old 08-22-2013, 07:03 AM
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perhaps you should PM fbird if you want him to answer?There are many variables,including the talent of the engine builder.The parts are adequate to meet your goals.You can do the math yourself.Get the head flow numbers and multiply the intake value by 2.2,,,this will give you the power potential.
now you look for weakness in the combination,IE:
exhaust flow is less than 78-80% of the intake side,
The cam specs are not perfect to extract the max flow from the heads,
The intake will have limitations
The carb has limitations,
exhaust system may have less than ideal parts,(wrong size headers,too small exhaust system,
ignition system???
anything that is less than perfect will take away from the formula,,,,

other things combustion chamber shape,compression ratio,valve train,drag,
final tuning,CRITICAL,done by someones butt or on a chasis dyno
add up all the flaws and subtract that from the total possible power out put
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