Need your opinion on new engine...

[ncbloodhound]

Ok, I am thinking about rebuilding the engine in my K5 and want to get your opinions on the rebuild.

Here are the specs for a 383 stroker....let me know where improvements can be made or where you would do something different.

1. TBI bored to 50mm (supposedly flows 750cfm with other mods)
2. TBI spacer
3. injector spacer? 1/4 inch
4. Edelbrock Peformer TBI Intake Manifold
5. World Products S/R Torquer Cylinder Heads (76cc)
6. stock block decked at 9.000, bored .030 over, clearanced for 3.75" stroke.
7. Keith Black Hypereutectic flat top pistons 4.030 bore.
8. 6.0" scat rods (H or I beam)?
9. Scat 9000 series 383 crank.
10. Comp Cams or Crane hydrallic roller 280/280 cam
11. HEI with MSD module ignition.
12. Hooker Headers 1 5/8 primaries
13. No Cat (no more emissions testing for my truck next year…)
14. DynoMax 2.5 inch muffler(s).
15. stock reworked oil pump
16. new ECM

I think my final compression ratio will be around 9.6:1

Questions,
1. Will stock oil pump do?
2. Got suggestions on thermostat? (165 I assume)
3. Think this setup will be too hot for electric fans?
4. Any guesses on the output of this motor?

 

[SUBFAN]

I do not think the knock sensor will like the solid roller cam....

 

[ncbloodhound]

I do not think the knock sensor will like the solid roller cam....

Good point..I forgot about that. I basically found 2 write ups on 383 strokers and combined the 2 into 1 engine that I want to build. Missed that issue. I have updated the specs to go to a hydrallic roller instead.

 

[Mad-Dog]

I wouldn't think that would bother it, i've been wrong before......a gear-drive on the other hand might

 

[Mad-Dog]

The CR will be 9.7:1 with a (-5cc) 2-eyebrow piston and a .039" compressed gasket.
Small chamber heads (64cc) with a 18cc inverted dome piston and .010" deck will give ya 9.45:1 CR with a .039" head gasket while running great on pump gas with iron heads.
I would use a dual-pattern cam, and 280/280 is a whole lotta cam brother....what do you plan to use the truck for, drag-racing ?

Go here.......get some ideas........be realistic and you will be happier with the finished product

http://www.ryanscarpage.50megs.com/combos1.html

 

[SUBFAN]

The GM Hot cam seems to work well....Some on here have used it in their injected 383's with success....

DERF00 is one of them I believe....

 

[ncbloodhound]

The CR will be 9.7:1 with a (-5cc) 2-eyebrow piston and a .039" compressed gasket.
Small chamber heads (64cc) with a 18cc inverted dome piston and .010" deck will give ya 9.45:1 CR with a .039" head gasket while running great on pump gas with iron heads.
I would use a dual-pattern cam, and 280/280 is a whole lotta cam brother....what do you plan to use the truck for, drag-racing ?

Go here.......get some ideas........be realistic and you will be happier with the finished product

http://www.ryanscarpage.50megs.com/combos1.html

Thanks for the info. I have had some concerns about the cam, but don't have a lot of experience with this. With each of the writeups I used, the engines were basically the same, but the cam was the one significant difference. I then looked at the theoretical output of both engines and went with the one with higher output. I definatly have a lot more research to do. Thanks for the input!