Re: Stealth Heads, Max Wedge vs Std Port
[Re: FastmOp]
#3120768
02/11/23 08:33 PM
02/11/23 08:33 PM
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Joined: Jul 2005
Posts: 1,624 qc
mxbeep
top fuel
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top fuel
Joined: Jul 2005
Posts: 1,624
qc
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Stealth heads are a great improvement over a stock head and very affordable. They can easilly be ported for more flow,
Just dont make the mistake i did of sending them to KG engines for their CNC porting , they came back butchered. [censored] porting,spring heights not properly done and worst of all they ruined the valve seats. Owner gave me every excuse in the book and never re imbursed a penny of the $1500.00 i paid .
Lesson learned, never deal with KG engines again and make sure no one else gets taken like me.
Last edited by mxbeep; 02/11/23 08:35 PM.
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: mxbeep]
#3120884
02/12/23 12:24 PM
02/12/23 12:24 PM
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Joined: Mar 2005
Posts: 3,142 Central NC
gch
master
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master
Joined: Mar 2005
Posts: 3,142
Central NC
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I have a set of 440 source cnc heads I bought from a member here years ago. Times got tough and I sold them to the guy who bought my old 68 Chrysler 300 20+ years ago. Last year I bought the Chrysler 300 back from him and bought those same cnc source heads from the mechanic he sold a motor to that had them on it. So in the next month my old heads are going on my old car with a fresh 440 and the comp xe274 cam out of the motor the heads were on. Not a race car by any means but should move the old c body pretty well even with 3.23 gears. The car does have a nitrous system for extra giggles. I look forward to finally using them after all of these years.
Last edited by gch; 02/12/23 12:25 PM.
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: gch]
#3120891
02/12/23 12:43 PM
02/12/23 12:43 PM
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Joined: Jan 2003
Posts: 14,497 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,497
So. Burlington, Vt.
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Ootb Stealths Flow right around 260 on my bench.
Recut the seats, back cut the valves, blend the bowls and SSR, they’re basically right at 280.
Whittle down the guide boss, open the pinch a bit, relieve the chamber wall adjacent to the intake valve....... puts it right at about 290.
I suspect that from that point, increasing the size of the opening to MW size would be worth less than 10cfm.
The set from the pic below went on a build that was going to be using a factory x-ram.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: GPSflyer]
#3121527
02/14/23 06:27 PM
02/14/23 06:27 PM
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Joined: Dec 2013
Posts: 4,672 Wichita
GY3
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master
Joined: Dec 2013
Posts: 4,672
Wichita
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I’ve been very happy with all of the parts I’ve ordered from 440 source. I had one issue with the lightened crank. They thru drill the end of the crank, and install a freeze plug. It leaked oil out the back of the crank after I put it in the car. Had to pull the trans to fix it. Not the end of the world.
Very cool car!
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: A727Tflite]
#3121533
02/14/23 06:41 PM
02/14/23 06:41 PM
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Joined: Jun 2005
Posts: 75 Colorado
GPSflyer
member
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member
Joined: Jun 2005
Posts: 75
Colorado
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I would imagine you have to sit in the back seat when driving - with the length of your legs and all. I should’ve gotten a C-body…. Who is this?
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: GPSflyer]
#3121544
02/14/23 07:10 PM
02/14/23 07:10 PM
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Joined: Mar 2011
Posts: 3,076 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,076
Michigan
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I would imagine you have to sit in the back seat when driving - with the length of your legs and all. I should’ve gotten a C-body…. Who is this? I reported your flow numbers a while back during another discussion. Seems some people didn’t believe me or the flow numbers.
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: GPSflyer]
#3121602
02/14/23 09:24 PM
02/14/23 09:24 PM
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Joined: Mar 2011
Posts: 3,076 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,076
Michigan
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Yeah, that’s the numbers I was given. That’s all I know.
I’m happy with them, I wanted to keep it looking halfway stock under the hood, and was going to open up the intake ports myself to max wedge size, until modern told me they already had a file for that on stealth heads. By comparison, a nice stock legal set of Stage 3 MaxWedge heads with a S/S legal valve job flowed 278 at .700”, standard valve size.
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: GPSflyer]
#3121641
02/15/23 12:01 AM
02/15/23 12:01 AM
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Joined: Mar 2011
Posts: 3,076 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,076
Michigan
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Do you happen to remember what unported stage III heads flowed? My old engine has untouched heads on it, after I pulled it out of the car it got rebuilt and stuck in the corner of the garage. It ran good, but nothing like the new engine. I’m sure my dad or I will come across some car to stick it in. The numbers I mention above your post are unported MaxWedge.
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: GPSflyer]
#3121684
02/15/23 10:31 AM
02/15/23 10:31 AM
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Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
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master
Joined: Jan 2003
Posts: 4,296
Chicago, IL
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I’ve been very happy with all of the parts I’ve ordered from 440 source. I had one issue with the lightened crank. They thru drill the end of the crank, and install a freeze plug. It leaked oil out the back of the crank after I put it in the car. Had to pull the trans to fix it. Not the end of the world.
Very cool build and engine compartment looks super clean with nice retro features. Always loved the 62 Dart.
2 kids and a dog
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: fast68plymouth]
#3121854
02/15/23 08:13 PM
02/15/23 08:13 PM
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Joined: Feb 2005
Posts: 4,313 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,313
Prospect, PA
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Ootb Stealths Flow right around 260 on my bench.
Recut the seats, back cut the valves, blend the bowls and SSR, they’re basically right at 280.
Whittle down the guide boss, open the pinch a bit, relieve the chamber wall adjacent to the intake valve....... puts it right at about 290.
I suspect that from that point, increasing the size of the opening to MW size would be worth less than 10cfm.
The set from the pic below went on a build that was going to be using a factory x-ram. So I went and pulled my MCH data comparing CNC “std. port” and MW CNC w/ 2.19. The MW w/ 2.19s was about 11 cfm better @ 0.200”, 0.300” and 0.400”, 7.5 cfm @ 0.500”, 6.5 cfm @ 0.600, and 3.5 cfm @ 0.700”. I assume the low lift improvement was due to the larger valve.
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: GPSflyer]
#3121939
02/16/23 06:13 AM
02/16/23 06:13 AM
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Joined: Mar 2003
Posts: 9,099 Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
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Do you happen to remember what unported stage III heads flowed? My old engine has untouched heads on it, after I pulled it out of the car it got rebuilt and stuck in the corner of the garage. It ran good, but nothing like the new engine. I’m sure my dad or I will come across some car to stick it in. There is a black 62 dart roller for sale in k falls. On topic, does anyone currently offer a MW program for the Stealths? I have a set that needs some love.
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Re: Stealth Heads, Max Wedge vs Std Port
[Re: BSB67]
#3121972
02/16/23 10:49 AM
02/16/23 10:49 AM
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Joined: Jan 2003
Posts: 14,497 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,497
So. Burlington, Vt.
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The MW w/ 2.19s was about 11 cfm better @ 0.200”, 0.300” and 0.400”, 7.5 cfm @ 0.500”, 6.5 cfm @ 0.600, and 3.5 cfm @ 0.700”.
I take it the std port CNC port still had the 2.14 valve?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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