Hey guys. I finally decided what direction to go with my 78 c10, and thats the pull the 383 and re-work it direction smile.gif
I want to put a ultradyne grind in, so I know you guys are the ones to ask :D The shortblock has 30,000miles, and will be getting fresh ARP bolts and forged 11:1 pistons, along with a cast crank and 2bolt ARP lower end. The top end is vortec heads with SS valves and isky springs, victor intake, 750DP holley, comp roller tip rockers, MSD ignition, pete jackson gear drive. It sits in front of a M20 4speed.
I want to go with a solid flat tappet cam, no more then .510-.515" lift on the intake, anything goes for the exaust, with shift point at 6000-6500rpm [Ill leave that up to you experts]
This is not a street truck at all anymore, so Im not worried about power below 3000rpm. I just want max power in the rev range Ill use at the tract. Thanks guys!

Comp makes a .470" lift rule cam # 12-523-5, 242/250 with .473" lift. Use some 1.6 full roller rockers for .504" lift. Should run well in your motor up to 6000 rpm.

RPM···········2000····2500····3000····3500····4000 ····4500····5000····5500····6000····6500
Brake_Tq······186·····364·····432·····464·····493· ····502·····492·····464·····408·····334
Brake_HP······71.0····173·····247·····310·····376· ····430·····468·····486·····466·····413
Exh_Pres······.0······.0······.0······.0······.0·· ····.0······.0······.0······.0······.0
Int_Vacuum····0.0·····.1······.2······.4······.5·· ····.7······.9······1.1·····1.2·····1.2
Vol_Eff_%·····57.3····76.7····85.5····91.6····97.7 ····101.3···102.8···102.0···97.4····92.0
Actual_CFM····137·····235·····311·····384·····471· ····551·····620·····674·····701·····716
Fuel_Flow·····49.9····85.9····114·····140·····172· ····201·····227·····246·····256·····262
A/F_Mix_Qal···65.2····91.0····98.0····100.0···100.0· ··100.0···100.0···100.0···100.0···100.0
BSFC··········.704····.496····.461····.454····.458 ····.469····.484····.507····.550····.633
BSAC··········8.827···6.217···5.788···5.692···5.74 9···5.880···6.076···6.364···6.904···7.937
Friction_HP···16······25······35······47······63·· ····84······110·····141·····177·····231
Mach_#········.179····.224····.269····.314····.359 ····.404····.448····.493····.538····.583
Piston_Spd····1250····1563····1875····2188····2500 ····2813····3125····3438····3750····4063
Piston_Gs·····283·····442·····637·····867·····1133 ····1433····1770····2141····2548····2991
Overlap_%VE···-2.0····5.4·····5.0·····3.5·····4.6·····4.8·····4.7 ·····4.4·····3.7·····3.1
Int_AvgVel····112·····140·····168·····196·····224· ····252·····280·····308·····336·····364
In_InertiaPrs·0.0·····.2······.8······1.4·····2.0· ····2.5·····2.7·····2.7·····2.6·····2.3
In_ResTunPrs··0.0·····0.0·····0.0·····0.0·····0.0· ····0.0·····0.0·····0.0·····0.0·····0.0
Ex_AvgVel·····129·····161·····193·····226·····258· ····290·····322·····355·····387·····419
ExTun_Prs·····.1······-.9·····-1.0····-.5·····-1.4····-2.3····-2.6····-2.4····-2.0····-1.6
Valve_Toss····None····None····None····None····None ····None····None····None····None····None
Spark_Adv·····31······30······29······29······29·· ····30······31······32······33······34

11.07@120.10 in my 3500# mule car.

I ran the Comp 12-221-5 solid flat tappet cam in my 383 and loved it!
Specs are 280/285, 242/250 @ .050, .507/.532 with 1.5 rockers, LSA 108.

comp also has some tight-lash solid cams that are pretty serious. :cool:

Originally posted by BillsCamino:
I ran the Comp 12-221-5 solid flat tappet cam in my 383 and loved it!
Specs are 280/285, 242/250 @ .050, .507/.532 with 1.5 rockers, LSA 108. I still run this cam in my 383. It makes great power and has pushed my El Camino to a best of 11.39 in the 1/4.

Good ideas, thanks guys. Ill go home and do a little DD2000 comparo and see which I like better smile.gif