Stock ECZ-B intake manifold testing (again).


http://forums.y-blocksforever.com/Topic78123.aspx
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By Ted - 12 Years Ago

As a continuation of the ECZ-A manifold results that were posted within the last couple of weeks, here are the dyno results after running the Lincoln Teapot and a couple of other carbs on a dead stock, never modified, unmolested, as delivered from Ford, ECZ-B iron intake manifold.  The step at the bores under the carbs is still present on this intake.  The Lincoln carb was used with an upside down tapered carb adapter.  The other two carbs had the 1957 7/16” Bakelite spacer under them but the spacer has been reworked to allow the larger carb throttle blades to work freely.

 

Horsepower – Stock ECZ-B Intake with various carbs

 

Rpm

Lincoln Teapot

625 Demon Street Fighter

750HP Holley vac sec

2500

146

128

143

3000

190

185

185

3500

221

221

213

4000

241

249

240

4500

249

268

260

5000

253

277

271

5500

246

276

273

Peak@rpm

255@5100

279@5200

276@5200

 

Torque lbs/ft – Stock ECZ-B Intake with various carbs

 

Rpm

Lincoln Teapot

625 Demon Street Fighter

750HP Holley vac sec

2500

306

269

300

3000

333

324

324

3500

331

332

319

4000

316

327

315

4500

291

313

304

5000

265

291

285

5500

246

263

261

Peak@rpm

335@3200

333@3700

324@3000

 

Because the 600 vac sec carb that was used with the ‘A’ manifold is no longer here, I substituted one of the new Demon carbs and made a single pull with it.  That carb has much smaller primaries and makes up for it with a ‘Goggle’ valve in the secondaries making the carb close to being a three barrel.  Jetting was in the ballpark but could have still stood some tweaking if I was going to leave it on the single four manifold.  That tweaking will happen when two are them are used in the dual quad intake test.

 

Unlike where the various carbs were run on the 1956 ECZ-A intake and there was not much difference in power outputs due to the flow limitations of that particular manifold, the 1957 ECZ-B manifold even in its stock form does respond nicely to the larger cfm carburetors.

 

Here’s the link to the ECZ-A intake dyno test results.  http://forums.y-blocksforever.com/Topic77765.aspx 

By Ted - 12 Years Ago

And here’s a picture of the Demon Street Fighter carb sitting atop the stock ECZ-B intake.

 

By DryLakesRacer - 12 Years Ago
The numbers up to 4000 do not suprise me at all. Small bores were known for this but always ran out at the upper end. It will be neet to see these numbers on you dual quad tests too. I'll bet the 4GC's will make a good showing as well as the little Holleys...............Thanks