The prototype 9.5 deck aluminum block was assembled to our HARDCORE spec and tested extensively. The brief build specs: 427, (4.125 x 4.00) 9.8 compression, solid cam, 4500 carb, World Windsor Sr. aluminum heads (2.08x1.60), pump gas. The iron version is rated at 525HP and they have been pulling 540 to 550HP regularly of late. This made 560HP at 6300 and 6400 RPM and peaked 527 lbft at 4800. Starting at 3500 RPM it pulled 496lbft and it made over 500lbft from 4000 to 5700RPM.
See the dyno sheet by clicking here!
The contention that aluminum blocks “always lose power” (compared to iron) is disproved here we believe, because of our use of ductile iron sleeves which are inherently stronger than cast iron. All of our aluminum block designs use the ductile sleeves and never show a power deficit to their iron counterparts. This one surprised by making more.
Now here's the huge advantage: this complete engine as seen weighs only 399 POUNDS.
More testing for this block will begin next week with our brand-new 18° 4-bolt and 10° 6-bolt head programs.
Blocks, shorts and complete engines will be available in 8.2 and 9.5 configurations in late July.
UPDATE:
As stated above we’ve now tested our new Man O’War 18° aluminum heads for small block Ford. Let’s briefly review the testing to date.
The original series was to test the first Man O’War aluminum block as a complete running engine. We’ve done that and it’s all good. The engine was built with our conventional Windsor Sr. 200cc, CNC port and chamber heads, which have always worked quite well. They have supported well over 600HP on our Limited Edition and Drag engine versions. On this Hardcore version they helped produce 560 HP.
The concept of this test was to evaluate our new head. This is an as-cast 64cc chamber design with a 235cc intake runner. It features standard port locations and 2.100 x 1.625 Manley valves and Hardcore spec springs.
See the dyno sheet by clicking here!
The significant news here is that the new design matches the previous one at each RPM point almost exactly. From 5000RPM on up the 18° grows power consistently to 6300 where it exceeded the CNC head by thirteen HP. So the conclusion is that we’ve produced an as-cast head which improves power over our already successful CNC design. These will become our “standard” SBF aluminum head. There’s obviously generous room to port these new heads which may produce outstand Ford street/strip power.
Other engine test programs must proceed now but when the 10° 6-bolt heads arrive in a few weeks we’ll build a mega sheetmetal based configuration to find big power in the Man O’War line.
9/17/07 UPDATE:
The 460 is here! Click here to see the dyno result.
