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Who has milled their Stealths?
#305372
05/02/09 10:36 AM
05/02/09 10:36 AM
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
rexus31
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San Gabriel, CA 91775
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How much did you take off? What is your compression ratio? Chamber volume?
As it stands right now, if I bolt my Stealths on my 383 (.030 over, slug .035 in the hole) I'm at 8.8:1. This is basically a stock spec street motor with a .450 lift cam; very mild. I got the Stealths becasue of their affordability and close resemblance to a stock casting more so than their added performance. I'm just wondering if I should mill them or run them as is.
2007 Dodge Charger R/T, Road and Track Performance Group, Steel Blue
1965 Chrysler 300 Convertible, 383 4V, 727TF, Factory Air, Spanish Red
1964 Pontiac GTO, Tri-Power, 4 Speed, Grenadier Red
"What ain't no country I ever heard of. They speak English in What?" - Jules Winnfield
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Re: Who has milled their Stealths?
[Re: komninon]
#305375
05/02/09 01:35 PM
05/02/09 01:35 PM
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
rexus31
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OP
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Posts: 366
San Gabriel, CA 91775
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Quote:
my motor is still at the machine shop. is a 440 with stealth heads. i think they milled the heads .050 use fel -pro 1105 gaskets
now it is 78cc and compression 10.6 to 1. i will have all the paperwork next week after the dyno.
Thanks. What gas are you planning to use?
2007 Dodge Charger R/T, Road and Track Performance Group, Steel Blue
1965 Chrysler 300 Convertible, 383 4V, 727TF, Factory Air, Spanish Red
1964 Pontiac GTO, Tri-Power, 4 Speed, Grenadier Red
"What ain't no country I ever heard of. They speak English in What?" - Jules Winnfield
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Re: Who has milled their Stealths?
[Re: rexus31]
#305376
05/02/09 09:45 PM
05/02/09 09:45 PM
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Joined: Jan 2003
Posts: 1,142
Central New York
slippery440
Crybaby440
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Crybaby440
Joined: Jan 2003
Posts: 1,142
Central New York
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Milled .075 started at 84 cc now 72 cc. We had to take .095 o9ff the intake side.I would take half of the head and then the rest off the intake manifold,
If the MODS did their job I would not be hitting the notify MOD button. LOL
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Re: Who has milled their Stealths?
[Re: slippery440]
#305378
05/02/09 10:54 PM
05/02/09 10:54 PM
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
rexus31
OP
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OP
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Posts: 366
San Gabriel, CA 91775
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Wow....using a web based milling calculator, it would only take .040 to get them down to 72cc. Based on my calculations, milling them .075 would give you 62cc chambers. What's your compression ratio? 440 or 383?
2007 Dodge Charger R/T, Road and Track Performance Group, Steel Blue
1965 Chrysler 300 Convertible, 383 4V, 727TF, Factory Air, Spanish Red
1964 Pontiac GTO, Tri-Power, 4 Speed, Grenadier Red
"What ain't no country I ever heard of. They speak English in What?" - Jules Winnfield
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Re: Who has milled their Stealths?
[Re: rexus31]
#305379
05/02/09 10:57 PM
05/02/09 10:57 PM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
Wow....using a web based milling calculator, it would only take .040 to get them down to 72cc. Based on my calculations, milling them .075 would give you 62cc chambers. What's your compression ratio? 440 or 383?
Was that calculator based on a typical Mopar chamber? cause the Stealths taper quite a bit more than say a 915..
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Re: Who has milled their Stealths?
[Re: 1_WILD_RT]
#305380
05/02/09 11:11 PM
05/02/09 11:11 PM
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
rexus31
OP
enthusiast
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OP
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
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Quote:
Quote:
Wow....using a web based milling calculator, it would only take .040 to get them down to 72cc. Based on my calculations, milling them .075 would give you 62cc chambers. What's your compression ratio? 440 or 383?
Was that calculator based on a typical Mopar chamber? cause the Stealths taper quite a bit more than say a 915..
Does that mean more material has to be removed to obtain a certain chamber volume?
2007 Dodge Charger R/T, Road and Track Performance Group, Steel Blue
1965 Chrysler 300 Convertible, 383 4V, 727TF, Factory Air, Spanish Red
1964 Pontiac GTO, Tri-Power, 4 Speed, Grenadier Red
"What ain't no country I ever heard of. They speak English in What?" - Jules Winnfield
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Re: Who has milled their Stealths?
[Re: 1_WILD_RT]
#305382
05/03/09 03:16 AM
05/03/09 03:16 AM
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Joined: Mar 2009
Posts: 2,465
Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,465
Sydney,Australia
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cc'd mine at 86/7.milled down for 78cc
Tex
New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive
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Re: Who has milled their Stealths?
[Re: tex013]
#305384
05/03/09 08:47 AM
05/03/09 08:47 AM
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Joined: Jan 2003
Posts: 1,142
Central New York
slippery440
Crybaby440
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Crybaby440
Joined: Jan 2003
Posts: 1,142
Central New York
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We cc the head 3 times. Once before and then at .045 and then at .075. Kind of suprised me too.We figure about 11.5 or 12 to 1 compression.Block at zero and flat top pistons at .005 out.
If the MODS did their job I would not be hitting the notify MOD button. LOL
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Re: Who has milled their Stealths?
[Re: rexus31]
#305385
05/03/09 09:43 AM
05/03/09 09:43 AM
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Joined: Jan 2003
Posts: 16,928
NC
440Jim
I Live Here
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I Live Here
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Posts: 16,928
NC
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Quote:
As it stands right now, if I bolt my Stealths on my 383 (.030 over, slug .035 in the hole) I'm at 8.8:1.
...
I'm just wondering if I should mill them or run them as is.
I would do something to get the CR up higher, unless you insist on running 87 octane. A piston to get zero deck would have been the best choice, but you have to do with what you got. IMO, a 10.0 CR, aluminum head, mild perf cam should be able to run on 92 octane or less.
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Re: Who has milled their Stealths?
[Re: rexus31]
#305386
05/04/09 11:50 AM
05/04/09 11:50 AM
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Joined: Feb 2007
Posts: 5,080
organ
maximum entropy
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master
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Posts: 5,080
organ
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i got a set of the cnc stealths. the chambers were all over the place- 83 to 85.5. i equalised them at 85.5 and had them milled .040 and they measured 76 cc if i remember.
for what is the good life if not doing things thoughtfully?
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Re: Who has milled their Stealths?
[Re: maximum entropy]
#305387
05/04/09 12:24 PM
05/04/09 12:24 PM
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
rexus31
OP
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OP
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
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Quote:
i got a set of the cnc stealths. the chambers were all over the place- 83 to 85.5. i equalised them at 85.5 and had them milled .040 and they measured 76 cc if i remember.
Did you have to shave the intake? How much did it cost you to have the heads milled?
2007 Dodge Charger R/T, Road and Track Performance Group, Steel Blue
1965 Chrysler 300 Convertible, 383 4V, 727TF, Factory Air, Spanish Red
1964 Pontiac GTO, Tri-Power, 4 Speed, Grenadier Red
"What ain't no country I ever heard of. They speak English in What?" - Jules Winnfield
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Re: Who has milled their Stealths?
[Re: rexus31]
#305388
05/04/09 01:31 PM
05/04/09 01:31 PM
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Joined: Feb 2007
Posts: 5,080
organ
maximum entropy
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master
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Posts: 5,080
organ
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the machinist i took it to charged me about 70.00. he said he prefers to shave the intake only, to compensate, not the intake side of the heads. not the way i would do it, but, hey, making your machinist irritated seems like a really bad idea, you know?
for what is the good life if not doing things thoughtfully?
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Re: Who has milled their Stealths?
[Re: maximum entropy]
#305389
05/04/09 03:39 PM
05/04/09 03:39 PM
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
rexus31
OP
enthusiast
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OP
enthusiast
Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
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Quote:
the machinist i took it to charged me about 70.00. he said he prefers to shave the intake only, to compensate, not the intake side of the heads. not the way i would do it, but, hey, making your machinist irritated seems like a really bad idea, you know?
How much did he take off the intake?
2007 Dodge Charger R/T, Road and Track Performance Group, Steel Blue
1965 Chrysler 300 Convertible, 383 4V, 727TF, Factory Air, Spanish Red
1964 Pontiac GTO, Tri-Power, 4 Speed, Grenadier Red
"What ain't no country I ever heard of. They speak English in What?" - Jules Winnfield
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Re: Who has milled their Stealths?
[Re: rexus31]
#305390
05/04/09 04:45 PM
05/04/09 04:45 PM
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Joined: Feb 2007
Posts: 5,080
organ
maximum entropy
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master
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organ
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he didn't take any off of the intake face of the heads, and i haven't mocked up the intake yet- it'll be a couple of weeks. the block was decked .025, btw. i can pm you with the results, if you like?
for what is the good life if not doing things thoughtfully?
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Re: Who has milled their Stealths?
[Re: maximum entropy]
#305391
05/04/09 09:57 PM
05/04/09 09:57 PM
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Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
rexus31
OP
enthusiast
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OP
enthusiast
Joined: Jan 2006
Posts: 366
San Gabriel, CA 91775
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Quote:
he didn't take any off of the intake face of the heads, and i haven't mocked up the intake yet- it'll be a couple of weeks. the block was decked .025, btw. i can pm you with the results, if you like?
That would be great, thanks!
2007 Dodge Charger R/T, Road and Track Performance Group, Steel Blue
1965 Chrysler 300 Convertible, 383 4V, 727TF, Factory Air, Spanish Red
1964 Pontiac GTO, Tri-Power, 4 Speed, Grenadier Red
"What ain't no country I ever heard of. They speak English in What?" - Jules Winnfield
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