383 build up
#1
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I would like to re-build a 383 sbc to about 450hp. What parts should I use and how reliable should I expect the engine to be (assuming a correct build)? I probably need a new set of lifters. Should I use hydraulic roller lifters? What cam should I use? What should I use for heads? I have a Performer intake. Is it adequate?
Thanks for your help.
Frank
Thanks for your help.
Frank
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A performer is best for a 305cid. I would never use it on any performance 383 or 350 for that matter.
Air Gap RPM - will easily support your hp wants
Good heads - AFR 195's / Trick Flow 195's / Canfield 195's / Brodix 200cc IK's or RR's / Dart Iron Eagle Platinum 200's / etc,etc. Vortec l31 max at about 400-410hp without some good porting as an FYI.
Cam - I would go with a Hydraulic Roller. The better the head the 'less cam' will be needed. And vice versa. Head chosen will determine type of cam spec's.
Compression - 9:1 to 9.5:1 max.
Exhaust - lightning or cmi headers. Not to sure anything else will support that hp level.
Air Gap RPM - will easily support your hp wants
Good heads - AFR 195's / Trick Flow 195's / Canfield 195's / Brodix 200cc IK's or RR's / Dart Iron Eagle Platinum 200's / etc,etc. Vortec l31 max at about 400-410hp without some good porting as an FYI.
Cam - I would go with a Hydraulic Roller. The better the head the 'less cam' will be needed. And vice versa. Head chosen will determine type of cam spec's.
Compression - 9:1 to 9.5:1 max.
Exhaust - lightning or cmi headers. Not to sure anything else will support that hp level.
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Just had a customer do one for a 22 Scarab. Top speed with a 26p prop is 68 mph GPS at 5200 rpm. Best the boat ran was 56mph with a 23p at 5400 rpm.
Bottom end
Flat top forged pistons with Eagle I beam 6 rods for 9 to 1
Stef's 9qt (10 qt system) pan with stock cooler (runs 210 degrees max)
Dart 200 Heads
AirGap Intake
750HP Holley that has been marinized
Hyd roller 222/230 .560/.510 on a 112 with 4 degrees adance
Morel Hyd rollers
Lightning Headers
Engine has been in for 3 weeks now. He is on his second alpha drive build.
Bottom end
Flat top forged pistons with Eagle I beam 6 rods for 9 to 1
Stef's 9qt (10 qt system) pan with stock cooler (runs 210 degrees max)
Dart 200 Heads
AirGap Intake
750HP Holley that has been marinized
Hyd roller 222/230 .560/.510 on a 112 with 4 degrees adance
Morel Hyd rollers
Lightning Headers
Engine has been in for 3 weeks now. He is on his second alpha drive build.
Last edited by cstraub; 09-06-2006 at 09:21 AM.
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ive built a few, start with a 4 bolt block go .030 over for 388ci, skat makes a drop in crank for the 383 3.75" stroke. skat makes a 5140 cast crank engine parts warehouse in hollywood fl has great prices on the skat parts specify 5.7 rods so the crank counter weight ill be the correct diameter as the make a crank for a 6.0" rod also, summit reconditioned 5.7" pink rods with arp bolts, srp/speed pro pistons flat top forged, run a cyl head with 72-76 cc chambers to run pump gas, victor single plane high rise intake, 750 cfm holley, doug herbert has great prices on roller valve train, cam, lifters, roller rockers, moly 1 peice push rods. install main bearings 1,3,5, and drop the crank in the block, install the cam and a speedmaster timing chain and gears. you will need to mock up the short block to clearance for the rods. you will have to grind the block in a few places and will need to gring a couple of the rod bolts to clear the cam shaft, a small base circle cam will make it easyer, but is not a neccesity, you will be amazed at how much grunt that little sucker has! pm me if you have any questions, or round up the parts and run over to tampa for a weekend i'll help you assemble the short block or the whole engine. rm
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I just built one for a blower application. I used the Eagle 12106 rotating assy with -31cc pistons (8.5:1), it was right at $1500. I am using the Edelbrock Etech 200 heads because I have the Vortec intake with the fuel injection. Hp should be in the 550 range.
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thanks for all the info and advice....
phil,
how much hp do you see out of that setup? ever had one in front of an Alpha drive?
phil,
how much hp do you see out of that setup? ever had one in front of an Alpha drive?
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Hey Blowncrown, I just dyno'd the Whippled 383 I built. Ported Vortec heads, 3.3L whipple with 800 carb. Crane hydraulic roller, Stainless Marine exhaust. Initial pulls made 571 HP at 5500 RPM, over 600 ft. lbs. of torque at 4000 RPM. This is ready to drop in the boat with wet exhaust, sea water pump and alternator. Power was still climbing at 5500. A little bit of tweaking should get me near 600. That is with 6 psi boost.
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Awesome Bob!
I'm going to hit the water with mine tomorrow and see how close AZM got the tune. What cam did you use, I may need an off season project?
I'm going to hit the water with mine tomorrow and see how close AZM got the tune. What cam did you use, I may need an off season project?
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Originally Posted by thedonz
thanks for all the info and advice....
phil,
how much hp do you see out of that setup? ever had one in front of an Alpha drive?
phil,
how much hp do you see out of that setup? ever had one in front of an Alpha drive?
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