517 hp street FE

Hey all,

This is my engine combo. I dynoed it last March. It was dynoed on a DTS engine dyno with open headers.

-428 "C" block bored 0.025" over for a 4.155" bore. 432 cubic inches.
-Factory cast 428 crank
-Factory CJ rods with ARP bolts
-Holley 850 double pumper with choke horn milled off. 76 jets all around.
-Blue Thunder dual plane intake port matched to heads. 1" four hole spacer.
-Edelbrock #6005 heads with Ferrea 2.09/1.65" valves, 45 degree seat intake and exhaust. Intake ported pretty extensively. Exhaust just cleaned up. Flow @ 0.600" 293/206 cfm.
-Harland Sharp roller rockers
-JE forged pistons. 10.5:1 static compression
-Solid flat tappet cam. 270/276 degrees @ 0.020". 240/246 degrees @ 0.050". 0.598"/0.608" gross lift. 108 degree lobe separation. 107 degree intake centerline. This is a Compcams custom grind. Intake lobe is a 270XTQ and the exhaust is a 276TL. Lifters are Crower dumbbells with the "cool face" EDM oiling hole.
-Milodon deep sump oil pump. Melling HV oil pump. oil passages opened up at oil pump mount. 0.090" restrictors to rockers. windage tray.
-Crites headers. 2" primary tubes. 3.5" collectors.
-MSD Pro Billet distributor. MSD 6AL box. MSD Blaster coil. 16 degrees initial timing. 37 degrees total.

RPM---HP---Torque
3000--261----456
3100--274----464
3200--288----473
3300--303----482
3400--317----489
3500--330----496
3600--344----502
3700--358----508
3800--371----513
3900--384----517
4000--395----519
4200--417----521
4300--426----520
4400--435----519
4500--443----517
4600--451----515
4700--457----511
4800--464----508
4900--471----505
5000--477----501
5100--483----498
5200--489----494
5300--495----490
5400--500----486
5500--506----483
5600--510----478
5700--512----472
5800--513----464
5900--514----457
6000--515----451
6100--516----445
6200--517----438
6300--514----428
6400--502----412

I put the motor in a '67 Cougar with a low ratio C6, 2600 rpm stall, and 3.25 gears. I have since adjusted the valve lash tighter (from 0.020" to 0.013" hot) and changed to a Proform main body. It feels like it picked up a substantial amount of power from those two changes. I'd guess at least 20 hp. According to my G-tech g-meter it is running 11.75 in the 1/4 with 255/60R15 Mickey Thompson drag radials. It runs fine on 91 octane pump gas. It seems to like to shift at about 6600 rpm.

I have more detailed info if anybody wants it. Just thought I'd share a good running street combo.

FE Paulie