SBC various Vortec Dyno Tests and Flow Sheets

[maxracesoftware]

SBC various Vortec Dyno Tests and Flow Sheets

426.7 Peak HP at 6000 RPM

originally started out with out-the-box #062 Vortecs and aluminum GM Dual-Plane
SBC Mud Truck Engine 361.5 cid 4.060x3.490
Factory powdered metal rods ARP bolts .827 pins
Factory Crank
GM Chevy OEM cast iron Vortec Heads
GMPP Vortec Aluminum dual-plane + HVH 4-hole Super Sucker
Edelbrock Vortec Air Gap dual-plane + HVH 4-hole Super Sucker
Original 461 short block with CompCams Hyd Flat tappet 241/245 .360/.360 Lobes 0.5472/0.5472 Valve Lifts
1.52/1.52 Roller-Tip CC Rockers
33 btdc
Rhoads Lifters VMax
12.4 CR
VP C45 .739 SPG Oxygenated Race Fuel
LAT 20/50 Breakin Oil
Vaccum Pump
Dyno Headers= 1.875x33.0 3.500x16.0
------------------------
90/92 from 86/86 jets
raise float levels
93.5/96 from 90/92
.018 from .035 valve lash across hot

made : Peak HP all over the place .... Note: this is from one single Dyno test run
426.1 @ 5200 RPM
426.4 at 5400 RPM
426.7 at 6000 RPM
426.4 at 6200 RPM

[maxracesoftware]

426.7 Peak HP at 6000 RPM

[maxracesoftware]

426.7 Peak HP at 6000 RPM

[maxracesoftware]

426.7 Peak HP at 6000 RPM

[maxracesoftware]

426.7 Peak HP at 6000 RPM

[maxracesoftware]

426.7 Peak HP at 6000 RPM

[maxracesoftware]

500.4 to 501.0 Peak HP at 6400 RPM ( from 426.7 Peak HP at 6200 RPM )

next series of Dyno tests were those very same #062 Vortecs maxed-out only with custom modified Goodson 3d Cutter Bodies/Cutters
and with a 6-Angle Valve Job, along with more Engine Mods, etc.

4.060x3.490=361.5 cid
#062 Vortecs 2.055/1.600 5/16 Stems
Dyno Headers= 1.875x33.0 3.500x16.0
Factory powdered metal rods ARP bolts .827 pins
Factory Crank
Edelbrock Perf RPM Air-Gap dual plane 1.000" HVC SS 4-Hole spacer
13:1 CR Diamond Flat Tops Total Seal .027/.027/3mm Rings
Billet Fab alum pan
LAT Breakin Oil 8 qts.
Star Vac Pump
Q16 Race Gas SPG= .716
new CompCams CS 5980/5985 s118 Nitrided Rhoades Hyd Lifters
251/247 .36200/.3630 118 Centers 114.5 CL 0.5792/0.5808 Valve Lifts
CC 1.60/1.60 Roller Tip Rockers Welded-Oil Deflectors
Jesel Belt
ATI Balancer
-------------------------------
35 btdc from 32
190 cranking psi Cyl# 2

[maxracesoftware]

500.4 to 501.0 Peak HP at 6400 RPM ( from 426.7 Peak HP at 6200 RPM )

[maxracesoftware]

new ProMaxx Vortec Heads = 525.9 Peak HP at 6200 RPM ( from 500.4 Peak HP #062 Vortec Heads )

custom modified Goodson 3d Cutter Bodies/Cutters
and with a 6-Angle Valve Job, including Chambers Cutters + Bowl Blades

Mud Truck SBC 4.060x3.490=361.5 cid
ProMaxx 185cc Vortec Heads 2.055/1.600 5/16 Stems .600 Lift= 242/176 CFM
modified ProMaxx Heads with offset 7/16-NC Nutserts w/Green Epoxy Packets for new 1.72/1.72 Roller Tip Rockers Welded-Oil Deflectors
CompCams CS 5980/5985 s118 Nitrided Rhoades Hyd Lifters
251/247 .36300/.3630 118 Centers 116.0 CL 0.62436/0.62436 Valve Lifts
Dyno Headers= 1.875x33.0 3.500x16.0
Factory powdered metal rods ARP bolts .827 pins
Factory Crank
Edelbrock Perf RPM Air-Gap dual plane 1.000" HVC SS 4-Hole spacer
13:1 CR Diamond Flat Tops Total Seal .027/.027/3mm Rings
Billet Fab alum pan
larger Oil pan w/LAT 5/30 racing oil 8 qts
Star Vac Pump
Q16 Race Gas SPG= .716
Jesel Belt
ATI Balancer
-------------------------------
C45 Oxygenated Race Fuel Pink color .739 SPG from Q16
18.5 in Hg vacuum at 1000 RPM
35.0 btdc from 34.0
Cam on 117.0 IntCl from 116.0 IntCL

[maxracesoftware]

new ProMaxx Vortec Heads = 525.9 Peak HP at 6200 RPM ( from 500.4 Peak HP #062 Vortec Heads )

[maxracesoftware]

new ProMaxx Vortec Heads = 525.9 Peak HP at 6200 RPM ( from 500.4 Peak HP #062 Vortec Heads )

[maxracesoftware]

new ProMaxx Vortec Heads = 525.9 Peak HP at 6200 RPM ( from 500.4 Peak HP #062 Vortec Heads )

[maxracesoftware]

new ProMaxx Vortec Heads = 525.9 Peak HP at 6200 RPM ( from 500.4 Peak HP #062 Vortec Heads )

[cpmotors]

Good info as always Larry! Although you should probably read some of the recent threads and realize a 2.055 intake valve and 1.875" header won't work in a OEM Vortec head

[Ron Miller]

Good info as always Larry! Although you should probably read some of the recent threads and realize a 2.055 intake valve and 1.875" header won't work in a OEM Vortec head

Pete, That would be me. I did send Larry an e-mail and he confirmed the 2.050 -1.6 was a good combo. He has never seen cracks in a head that had the 2.050 valves and bowl worked.

Larry, Thanks for the e-mail reply and info here.