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My first 383 stroker, how much power should my set-up make?

 
69nova355.
I mow my lawn and find Chevys
Posts: 2560
Joined: 08/09
Posted: 11/17/09 04:21 PM

thoes are both good cams that pontiacman gave you. if not going to race the car than get the biggest lift you can get with the shorest duration to get the max street torque (that wins street races).make sure you get a coverter to match your set up. 1.6 rockers will get you some more lift. you can get 500hp with more cam and higher compression.  

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Doogin2009
I love my Chevy Chevette!
Posts: 14
Joined: 11/09
Posted: 11/17/09 04:48 PM

Okay i have a few questions that I'd appreciate if anyone can answer for me Smile

What does duration do for the over all out put of the engine?
What does lift do for the over all out put of the engine?
When making a reliable street car that you want to take to the strip from time to time what would be a good choice for a cam?
....I apologize to everyone for my repeated question's i know i haven't been to clear with what i want out of my engine. Essentially i want a motor i can drive daily (if i don't mind paying for gas) and than if i wanna take it to the strip I'll get some great et's.  

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69nova355.
I mow my lawn and find Chevys
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Joined: 08/09
Posted: 11/17/09 05:51 PM

duration is the angle in crankshaft degrees that the valve stays off its seat during the lift cycle of the cam lobe, alonger duration keeps the valve open longer and in doing so makes more hp in higher rpm range(to much with no air flow kills low end torque). lift is how high the valve is lifted off its seat at its highest point. getting higher lift with out changing the duration as much as possible gets more power without changing the powerband. i would go with the cams pontiacman gave you, thoes cams are alittle bigger than what you have but you have enough air and fule to use them. This is why i say get the biggest cam you can with the lowest duration. mine is a lunati .490 .490 and gives ground pounding torque but you will have better heads and more cubes than me so a bigger cam will be better for you if tryin to reach 500hp.  

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69nova355.
I mow my lawn and find Chevys
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Posted: 11/17/09 05:54 PM

hope that clears some things up, i would also have your heads ported and go with 64cc chambers to raise compression.  

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Pontiacman2
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Posted: 11/17/09 06:21 PM

If it will be driven mostly on the street and only some occasional strip time the Lunati .504/.525 lift cam will be the better of the two and will perform pretty well.  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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Doogin2009
I love my Chevy Chevette!
Posts: 14
Joined: 11/09
Posted: 11/17/09 06:27 PM

Thank you so much for explaining the differences and benefits of lift and duration...it definately clears a lot up and i think i will be going with the lunati 60105, lol one more question hehehe, when i change cam's will i have to get different pushrods and lifters.....keeping in mind my lifters are already hydraulic flat tappet and my pushrods are 7.850" overall length for exhaust and intake? I would assume that i wouldn't have to change those considering the lunati cam is a hydraulic but with it having more lift i wasn't sure?  

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Doogin2009
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Posted: 11/17/09 06:29 PM

scratch the lunati 60105...i guess the 60104 is the better choice (thank you ponitacman) hehehe  

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Doogin2009
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Posted: 11/17/09 06:40 PM

When i change cam's will i have to get different pushrods and lifters.....keeping in mind my lifters are already hydraulic flat tappet and my pushrods are 7.850" overall length for exhaust and intake? I would assume that i wouldn't have to change those considering the lunati cam is a hydraulic but with it having more lift i wasn't sure?  

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Pontiacman2
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Posted: 11/17/09 07:03 PM

If you have the correct push rods for the heads you should be able to reuse them.
IF the lifters are new and have not been ran you can use the ones you have but would recommend the lifters you can get from Lunati in there cam&lifter kits.  
Pontiacman2
Pontiacman2

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Doogin2009
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Posted: 11/17/09 07:15 PM

Well the lifters and pushrods i have came with my cam and heads it was a complete head combo kit and i've yet to run it so, i'll just reuse the lifters and pushrods. Since they are brand new. Pontiacman thank you so much for all of your advice, and everyone else i truly appreciate it! Smile  

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Doogin2009
I love my Chevy Chevette!
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Posted: 11/17/09 07:15 PM

Well the lifters and pushrods i have came with my cam and heads it was a complete head combo kit and i've yet to run it so, i'll just reuse the lifters and pushrods. Since they are brand new. Pontiacman thank you so much for all of your advice, and everyone else i truly appreciate it! Smile  

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Pontiacman2
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Posted: 11/17/09 07:42 PM

Your welcome.
Be sure to break in the cam properly and be sure to use a oil that has ZDDP high pressure additive in it.  
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69nova355.
I mow my lawn and find Chevys
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Posted: 11/17/09 09:05 PM

good luck  

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mmanor1975
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Posted: 09/26/10 09:01 PM

the engine i purchased is also my first 383 and it from Blueprint. i bought it cheap so i can mod it later. here are the stats for this engine:
Block:

4-bolt main block

Rotating Assembly:

SCAT 3.75'' stroke cast crankshaft
Chevy 5.7'' heavy beam rods with 150,000psi bolts
Keith Black hypereutectic pistons
Hastings Moly rings
Clevite bearings
Externally balanced rotating assembly
Melling high volume oil pump
Heavy duty double roller timing set
Cylinder Heads:

GM Vortec cast iron heads
Hardened retainers and 1.25'' diameter valve springs
2.02'' swirl polished intake valves
1.60'' swirl polished exhaust valves
Hardened pushrods
Camshaft Specs:

Hydraulic Flat Tappet
Duration @ .050'' Lift: 234 Intake / 244 Exhaust
Lift: .487'' Intake / .508'' Exhaust
Lobe Separation: 112°
Other Features:

Professional Products dual-plane satin aluminum intake
Chrome valve covers
Chrome timing cover
New 5-quart oil pan
Brass freeze plugs
9.5:1 compression
Dress Model Adds:

Edelbrock 750cfm Carburetor
Edelbrock water pump
Edelbrock fuel pump
MSD distributor
MSD Coil
MSD spark plug wires
Braided fuel line
Horsepower: 405
Torque: 440

Just like they said in this thread that if you were to put a roller cam you could problably make an extra 25 ponies....they have this same engine but with a roller cam in it making 430 hp/ 470 tq.  
Screw rice cookers....buy a Chevy!!!

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WRIGHTRACING
I have an SS396 tatoo
Posts: 437
Joined: 03/10
Posted: 09/26/10 10:47 PM

Icon QuoteDoogin2009:
350 4 bolt main
4.030 bore
3.750 stroke

Scat forged 4340 balanced crank
scat forged 6" I-Beam connecting rods
Scat forged +7.00cc flat top pistons

Trick Flow aluminum heads,72 combustion chamber, 195cc intake runner, 2.02" intake valve diam., 1.600" exhaust valve diam.
Trick Flow Hydraulic Cam advertise duration 308in./316ex., valve lift 495in/510ex.,duration at 050 inch lift 246in./254ex.
Trick Flow 1.5 full roller rocker
Trick Flow double roller timing chain
Trick Flow Hydraulic Flat Tappet lifters

Holley Dominator Single Plane High Rise air gaped intake
Holley 4150 750cfm double pumper carb

Hooker 1 3/4 competition long tube headers

This is my current build and i'm just curious how much power i should make with this set up. It will be going in my 91 camaro z28. I would really appreciate any ones help, thank you all!




http://www.summitracing.com/parts/TFS-K314-500-450/

Trick Flow® has done all of the tweaking and tuning with these engine kits for small Chevy, so you can get dyno-proven horsepower with no guesswork. Based around the dyno-proven Trick Flow® Super 23® cylinder heads, these kits scream performance. These kits include everything you need to give your street or bracket engine a maximum performance makeover! These kits feature a Trick Flow® hydraulic roller camshaft with a 246/254 degree duration at .050, .558/.558 in. lift, with 1.5 ratio rockers and a 112 degree lobe separation.

Swap intake for AirGap and you should run low 7's in the 1/8 on good suspension and ET STREET (radials or slicks).  
WRIGHTRACING


www.outlawracing.com
www.dragraceplace.com
www.ndrra.com

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