As Tested by Muscle Mustangs & Fast Fords.
331 Short Block with Comp.Cams Hydraulic Roller XE274HR
 

Heads

Port Size In/Ex

Peek Flow In/Ex

Average Flow Intake

Peek BHP

Average BHP

Peek TQ

Average TQ

Comp. Ratio

Stock

127/44

166/112

207

351

253

400

316

10.2

GT-40X

176/61

234/157

275

390

315

416

386

9.9

Roush 200

199/63

248/161

286

391

313

412

385

9.9

AFR 185

180/69

277/200

330

448

343

445

418

10.6

Brodix M2

183/85

277/222

334

434

337

437

411

10.3

Canfield 197

192/69

283/203

334

435

338

443

413

11.4

EdelbrockRPM

181/65

251/186

305

430

332

428

404

10.1

TrickFlow TW

168/65

248182

306

438

335

443

408

10.6

World WL

184/57

234/150

270

386

315

419

388

9.9

 
 
AFR185-ford-left-angle2_(resized).jpgAFR  $1400
 
wrl-053030-1.jpgFord CNC 300   $1250
 
Pro_Topline_Ford_sm.jpgIRON LIGHTNING $1000
 
 

 

edl-6032_m.jpgEDELBROCK $1200
tfs-51400002_m.jpgTRICKFLOW $1250       
 
World_Ford_Heads_sm.jpgWORLD ROUSH IRON $950   
 
L_R_Ford_Heads_sm.jpgREBUILT STOCK  $650  
 

 

As Tested by Muscle Mustangs & Fast Fords.
Dart 427 Short Block with Comp.Cams Solid Roller XR286R
 

Heads

Port Size In/Ex

Peek Flow In/Ex

Average Flow Intake

Peek BHP

Average BHP

Peek TQ

Average TQ

Comp. Ratio

Stock

127/44

166/112

207

 

 

 

 

 

GT-40X

176/61

234/157

275

 

 

 

 

 

AFR 225

226/79

331/250

432

655

571

516

531

12.9

DartCNC Pro1

221/82

331/250

408

653

564

510

525

12.1

Edel. Victor Jr

236/94

314/240

414

622

566

599

526

12.3

Kasse/Jegs

215/-

345/242

436

641

558

554

519

11.9

ProTopline215

222/73

301/236

387

639

548

515

511

12.0

TrickFlow H

236/83

316246

414

613

553

598

514

11.7

TrickFlow R

225/97

342/258

433

667

580

572

538

12.3