CNC Head Porting

CNC

FHO Head Porting

FHO is proud to announce our purchase of the new RMC V-50HP 5 Axis Head Porting System. We have digitized our best flowing ports, and will now be offering heads with consistency not possible with hand porting. Our heads feature fully machined combustion chambers and ports, and will be offered in three head designs. These max port designs all come with pushrod sleeves installed. Includes full radius valve job.

Stage V Replacement Head- Machined for 2.25/2.30” intake and 1.90/1.94” exhausts valves. Specs as follows:

Flow Numbers ------------ Stage V Replacement

FHO CNC Ported Stage V Replacement Heads. For mild to wild street strip engines.
This is the standard aluminum head used on all FHO hemi crate engines.

Exhaust Port with 1.90" Valve

Intake Port with 2.30" Valve

Flowed at 28" without tube.

Flowed at 28"

.100"

.200"

135

.200"

159

.300"

187

.300"

248

.400"

230

.400"

315

.500"

258

.500"

384

.550"

267

.550"

412

.600"

279

.600"

435

.650"

287

.650"

453

.700"

295

.700"

467

.750"

298

.750"

469

.800"

301

.800"

471

Stage VReplacement Head with FHO CNC Porting

Tests performed on Superflow 600 with FlowCom

Combustion Chamber 168cc

Intake Volume 241cc

Exhaust Volume 118cc

Stage V Big Valve Head with raised exhaust port. Machined for 2.40” intake and 1.90/1.95” exhaust valves. Specs as follows:

Flow Numbers ------------ Stage V Big Valve -------- FHO CNC Porting

FHO CNC Ported Stage V Big Valve Heads.
These are the ultimate standard geometry water hemi heads.
For use in large cubic inch and/or blower applications.
Large intake port/raised exhaust.

Flowed at 28" without tube

1.90' Exhaust Valve and raised port

2.40" Titanium Intake Valve

.300"

174

.300"

263

.400"

225

.400"

347

.500"

269

.500"

417

.550"

285

.550"

450

.600"

302

.600"

471

.650"

310

.650"

489

.700"

314

.700"

505

.750"

316

.750"

515

.800"

319

.800"

519

.850"

321

.850"

522

.900"

322

.900"

523

Standard Pro-Street/Bracket Valve Prep.

2.40" Titanium Tulip Intake with 45 Degree Full Radius Seat

1.90" Titanium Tulip Exhaust w 45 Degree Full Radius Seat

Note: Optional Race Valve Job and Prep can produce 530cfm plus.

Tests performed on SuperFlow 600 with FlowCom.

Stage V M2000 Race Head- Raised intake and exhaust ports. Features 2.40/2.45” Intake and 1.95” exhaust valves. Requires custom sheet metal intake manifold. Specs as follows:

Flow Numbers ------------ Stage V M2000 ----------- FHO CNC Ported

For Hemis Only M2000 CNC Stage V Ported Heads
Flowed at 28"		Flowed at 28" no tube
2.45" Intake Valve		1.95" Exhaust Valve
.100 Valve Lift	77	.100"	51
.200 Valve Lift	154	.200"	125
.300 Valve Lift	237	.300"	184
.400 Valve Lift	320	.400"	222
.500 Valve Lift	399	.500"	256
.550 Valve Lift	438	.550"	276
.600 Valve Lift	474	.600"	302
.650 Valve Lift	503	.650"	320
.700 Valve Lift	528	.700"	334
.750 Valve Lift	547	.750"	340
.800 Valve Lift	558	.800"	343
.850 Valve Lift	570	.850"	345
.900 Valve Lift	581	.900"	349
,950 Valve Lift	586
1.00 Valve Lift	588	Raised Exhaust Port

Intake Valve- Titanium 2.45" 23" Degree Tulip with 45 Degree Seat.
Exhaust Valve- Titanium 1.95" 31 Degree Tulip with 50 Degree Seat
FHO M2000 heads require custom sheet metal intake manifold.

Call about our new M2000BV CNC heads with intake flow numbers in excess of 600cfm!

Tests performed on SuperFlow 600 with FlowCom.