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Old 02-21-2011, 04:17 PM   #1 (permalink)
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World Products Man O War 18 Degree SBF CNC Heads

World Products Man O War 18 Degree SBF CNC Heads-p1000407.jpg

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Old 02-21-2011, 04:20 PM   #2 (permalink)
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Re: World Products Man O War 18 Degree SBF CNC Heads

Intake Runner Volume: 242cc
Exhaust Runner Volume: 75cc
Chamber Volume: 64cc

Intake Valve Size: 2.100
Exhaust Valve Size: 1.600
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Old 02-21-2011, 04:25 PM   #3 (permalink)
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Re: World Products Man O War 18 Degree SBF CNC Heads

Flow Bench Results

4.030 Bore
Test Pressure at 28" of H20
Exhaust with no pipe

Intake Valve: Ferrea HF 6118

Intake
.200 128
.300 187
.400 235
.500 261
.600 285
.700 300
.800 307
.900 312
1.00 320

Exhaust Valve: Ferrea HF 6202

Exhaust
.200 114
.300 149
.400 179
.500 202
.600 210
.700 214
.800 217
.900 219
1.00 221
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Old 02-21-2011, 04:32 PM   #4 (permalink)
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Re: World Products Man O War 18 Degree SBF CNC Heads

Flowbench Results

Bore 4.160, and Hand Finished

Same valves and valve job just the larger bore.

Intake
.200 132
.300 193
.400 249
.500 279
.600 304
.700 322
.800 329
.900 336
1.00 339

Exhaust
.200 111
.300 158
.400 196
.500 208
.600 211
.700 214
.800 217
.900 219
1.00 221
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Old 02-21-2011, 06:32 PM   #5 (permalink)
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Re: World Products Man O War 18 Degree SBF CNC Heads

Nice. Thanks for the good info. Surprised and a bit disappointed at the numbers with those huge ports. Even the little Twisted Wedge TEA 185's flow better than that on a small bore and lifts under .700". I guess they're after the big-bore super-lift buyers, eh? Hmmm... With runners that large, I guess if a duck quacks, it still won't echo? LOL... never mind.

David

Typical TFS TEA ported 185 flow:
Trick Flow Twisted Wedge 185
Flow Data
TW 185
Lift Intake Exhaust
.100" 72 58
.200" 142 114
.300" 215 152
.400" 259 189
.500" 287 220
.550" 296 229
.600" 300 234
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Old 02-21-2011, 07:28 PM   #6 (permalink)
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Re: World Products Man O War 18 Degree SBF CNC Heads

Yeah! The TEA TFS Twisted Wedge cylinder heads put up better flow numbers on a bench. But your comparing two completely different cylinder head designs. Just because a cylinder head post big numbers on a flow bench doesn't mean that it's going to out run other cylinder heads at the race track. Making horsepower is about filling the cylinder with air and fuel as fast as possible. The faster you can fill the cylinder, the more cylinder pressure your going to have, and the more power your going to make.
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Old 02-21-2011, 07:37 PM   #7 (permalink)
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Re: World Products Man O War 18 Degree SBF CNC Heads

That's entirely true, but since that's all you posted, that's what I had to compare with. Average flows across selected parabolic ranges would be nice, too. Obviously comparative structured run testing would be better, and I'd like to see it, as there are a few features about them I see that may be great or not so. Very hard to tell from photos, as based on angle and lighting, they do often lie to the eye.

David
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Old 03-04-2011, 04:31 PM   #8 (permalink)
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Re: World Products Man O War 18 Degree SBF CNC Heads

Quote:
Originally Posted by PSIG View Post
Nice. Thanks for the good info. Surprised and a bit disappointed at the numbers with those huge ports. Even the little Twisted Wedge TEA 185's flow better than that on a small bore and lifts under .700". I guess they're after the big-bore super-lift buyers, eh? Hmmm... With runners that large, I guess if a duck quacks, it still won't echo? LOL... never mind.

David

Typical TFS TEA ported 185 flow:
Trick Flow Twisted Wedge 185
Flow Data
TW 185
Lift Intake Exhaust
.100" 72 58
.200" 142 114
.300" 215 152
.400" 259 189
.500" 287 220
.550" 296 229
.600" 300 234
The problem I have with TFS heads is the things that require changing. TFS (Canefield too) have tweaked their heads to get those number, unfortunately - in many cases its enough to make it difficult to fit headers as well as require relocation of valve clearance 'eyebrows'. For a dedicated race engine, not much of an issue; however, if you didn't start out with them in your build or you don't want to compromise with collectors hitting the floor boards, its going to cause problems.

You have to look at the whole picture, what the guy is trying to acheive before just going for the "big numbers". I know of more than a few guys who have ended up selling their TFS heads and bought AFR, World product or other once they came down off the max effort or bust game plan.

I got nothing against TFS ... other than their fitment issues and sometime the need for special requirements to deal with their geometry changes.

I haven't research the 18deg Man o war heads or FMS "N" heads they may have issues too.
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Old 03-05-2011, 06:49 AM   #9 (permalink)
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Re: World Products Man O War 18 Degree SBF CNC Heads

The only thing that I don't particularly like with these heads, are the exhaust port locations. It's in the stock location, and they're at a disadvantage because almost all of the other cylinder head companies have a raised exhaust ports. So it's not necessarily comparing apples to apples.
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