440 Source Super Stealth, what flow #'s?

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IQ52

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Okay, we pulled the trigger on a pair of Super Stealths today, they'll be here next week. Its time to see what these heads will flow. We'll slip some valves in and do some OOTB flows, then work them over and see where they go.

If they really do have more potential than the Stealths, they should be a very interesting cylinder head. I say this because we have a test Stealth head here in the shop that is producing these flows in different intake port configurations.

.................(1)..................(2)................(3)..........OOTB Stealth
.100"...........70 cfm............90 cfm...........80 cfm........73 cfm
.200"..........146................160...............163.............151
.300"..........209................218...............220.............214
.400"..........254................254...............264.............245
.450"...................................................285
.500"..........294................294...............301.............262
.550"...................................................313
.600"..........327................327...............329.............276
.650"...................................................339
.700"..........350................344...............341.............281
.750"..........354................349...............343

For other comparisons, here are,

...................OOTB Indy EZ.......OOTB Edelbrock Victor

.100"................66 cfm.......................68 cfm
.200"...............127...........................141
.300"...............181...........................204
.400"...............232...........................246
.500"...............272...........................277
.600"...............299...........................305
.700"...............315...........................324
 
Jim I will be watching this closely. I too have been wondering what they will do. they look good, but that dont mean nothin.
 
1,2,3, testing, testing, 1,2,3...............

.100............80 cfm
.200...........160
.300...........228
.400...........278
.500...........315
.600...........324
 
How do those compare to the CNC ported Indy heads with the closed chambers? Looks like you improved quite a bit over conf #3 listed above. Nice phat curve.
 
airwoofer said:
How do those compare to the CNC ported Indy heads with the closed chambers? Looks like you improved quite a bit over conf #3 listed above. Nice phat curve.
Click to expand...

Lift............325cc CNC 440-1..........'nother Super Stealth port

.100................66 cfm......................74 cfm
.200...............141..........................153
.300...............212..........................216
.400...............268..........................267
.500...............311..........................309
.600...............348..........................344
.700...............356..........................352

There is some more in the S/Stealth maybe, we'll dig a little deeper when we get the chance.
 
Not bad at all,considering what the castings probably cost.
 
Well, let's sum this thing up.

This is NOT A RACE HEAD.

The flows I have posted so far, are with big valves. The biggest valve the OOTB seat will support is the 2.14". If you want the flow you have to replace the intake seat and buy bigger valves.

So what can you do with the present seats?

This is what I suggest. Take a die grinder and some burrs and blend the gigantic bowls into the bottom of the existing hard seats, lay the short turn radius back without changing the height of the floor, do a 5 angle valve job, back cut the valve and open the erratic port window up to max wedge size. Do this and you can have a cheapo head that will flow........

.100...........73
.200..........145
.300..........208
.400..........257
.500..........295
.600..........316
.700..........327

If you want more than that.........GET A REAL HEAD.

If you don't open the window to max wedge size, your gunna get........

.100...........73
.200..........146
.300..........205
.400..........254
.500..........283
.600..........295
.700..........295

I wouldn't buy this head if your gunna have someone else do the work. This is a home project, el cheapo. It's just so the guy, who hotrods from his family garage, can save a few bucks and go a little faster.

Don't take this as I'm down on 440 Source, I have ALWAYS received excellent customer service from them.
 
thank you for sharing your results. I am in the market for new heads, these may be an option.
 
IQ52 said:
Lift............325cc CNC 440-1..........'nother Super Stealth port

.100................66 cfm......................74 cfm
.200...............141..........................153
.300...............212..........................216
.400...............268..........................267
.500...............311..........................309
.600...............348..........................344
.700...............356..........................352

There is some more in the S/Stealth maybe, we'll dig a little deeper when we get the chance.
Click to expand...

Pretty soon we may see Mike's flow numbers on a set of windjammer CNC ported 325 440-1 heads. Probably on the head flow thread.
 
airwoofer said:
Pretty soon we may see Mike's flow numbers on a set of windjammer CNC ported 325 440-1 heads. Probably on the head flow thread.
Click to expand...

Just so we're on the same page here. The flows I listed are for the 325 cc 440-1 heads that are ported by Indy. It would be of interest to me what others get, testing the Indy CNC ported heads, compared to another OOTB head on their bench.
 
IQ52 said:
Just so we're on the same page here. The flows I listed are for the 325 cc 440-1 heads that are ported by Indy. It would be of interest to me what others get, testing the Indy CNC ported heads, compared to another OOTB head on their bench.
Click to expand...

"windjammer CNC ported 325 440-1 heads" Those from Indy the ones you mean?
 
Jim they should be here in a little while. I will throw them on the bench and see whats what.
 
MRL, Thank You! Nice stuff,as usual. Nice choice,for a street car,that don't need high dollar Eddy. Victors......
 
Thanks again Jim, I'm just refreshing my memory.
 
fishmens67 said:
Thanks again Jim, I'm just refreshing my memory.
Click to expand...
Wow, you pulled up a relic , apart from you and the Op, none of the other posters are even around here anymore.
Feeling nostalgic ?
 
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