new engine build need suggestions

[k_pro1992]

well the 350 turned another bearing in my 97 so im going to build a 383 to drop back in. heres what im planning on building. let me know what you think.

350 block bored .30 over
Scoggins Dickey .600 lift Vortecs
+18 cc dished pistons for 9.5 compression
Scat 383 crank
Comp Cams 268XFI HR13
1.6 RR's
Marine Intake
custom tune

I'm not really conserned with top end power, its basically a cruiser that gets used for light farm work pullin trailers and on the weekends a boat. i want alot of lowend torque, anyone have an idea on how this engine will perform?

EDIT: this truck has 4.56 and 2500 stall converter

 

[Horns]

If you're not worried about top end power, then why not go with a milder cam that will be better for torque and will allow you to use your stock Vortec heads?

 

[k_pro1992]

i already have the higher lift heads from a motor i built last year, i thought with the higher lift and shorter duration it would preform better. and with the extra 33 cubes it would act a little milder than it is described.

 

[cviola2005]

Sounds like a good cam for your selection, (I am assuming you are retaining your FI?) I recommend around 10:1 compression for that low end torque.

What size valves do those heads have?

Also, what do you have in mind for rods?
Do the pistons in your list have the correct pin height for the stock rods?

 

[cviola2005]

What type of exhaust do you have in mind?

 

[k_pro1992]

Im keeping the FI with the marine intake so i can upgrade the injectors unless the mpfi i installed last yeat will keep up with the extra fuel needs. The valves are 1.94 and 1.50 haven't really spec'd out rods or pistons yet just figured out what size i wanted to use. I have obx long tube headers to install for the exhaust with 2 1/2 exhaust. Im going to add a x-pipe with no mufflers or cats. If i uped the compression to 10:1or 10.5:1 would i still be able to run pump gas?

 

[RyanR]

I'd go with a custom cut cam and a higher compression ratio, other than that, it sounds like a good build.

 

[cviola2005]

10.55:1 is the highest you can easily run on 93 pump gas. 10:1 can easily run 87 octane.

The long tube headers are a good choice for a lowend torque motor. Those with the 1.94I / 1.5E valves and Comps 268XFI cam should run very good. I will estimate HP/Torque with my DesktopDyno when I get home, around 1AM. It's accurate to within 10%. Should get you in the ballpark. On the last motor I built (using it for reference) it showed 418HP / 450FT Lbs. The engine dynoed in at 408HP / 435 Ft Lbs. Well within 10%

 

[Horns]

I'd go with a custom cut cam and a higher compression ratio, other than that, it sounds like a good build.

What grind would you reccomend Ryan?

 

[k_pro1992]

10.55:1 is the highest you can easily run on 93 pump gas. 10:1 can easily run 87 octane.

The long tube headers are a good choice for a lowend torque motor. Those with the 1.94I / 1.5E valves and Comps 268XFI cam should run very good. I will estimate HP/Torque with my DesktopDyno when I get home, around 1AM. It's accurate to within 10%. Should get you in the ballpark. On the last motor I built (using it for reference) it showed 418HP / 450FT Lbs. The engine dynoed in at 408HP / 435 Ft Lbs. Well within 10%

Thanks, id really appreciate that, just guessing id say somewhere around 380/460 but it would be nice to know for sure.