Re: have 906 heads right now should I go to stealth heads?
[Re: 79machocharger]
#59680
05/19/08 05:00 PM
05/19/08 05:00 PM
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Anonymous
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Anonymous
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if it was my decision.. i'd spend the coin on the 906's. nuttin like factory iron. advantage ussually goes to the aluminum heads. both for weight and gettin away with a bit more c/r. but when the porting tools come out, there both gonna cost $$$. but as JohnRR said, check and fix whats needs done, or take your chances and run either head "as is".
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Re: have 906 heads right now should I go to stealth heads?
[Re: 79machocharger]
#59681
05/19/08 05:43 PM
05/19/08 05:43 PM
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Joined: Nov 2007
Posts: 21,808 Kirkland, Washington
Pacnorthcuda
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Kirkland, Washington
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The HP potential of stealth vs. 906 can and has been debated to great length. Some situations simply don't warrant extra effort or $$$ for better flow numbers (I don't know the particulars of your engine build, so that may or may not apply to you) BUT, the weight savings is REAL, and its real for all situations--less so for some 4500# + luxo barge.
Weight saving is arguably better than increased power output because less weight means faster acceleration, faster deceleration, better handling, and more mpg. More power USUALLY only equates to faster acceleration.
To me, it doesn't make sense to spend similar money on heads and ignore the weight advantage. Its there waiting for you....take it.
And after all, its not like the Stealth option is likely to make LESS power!!!
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Re: have 906 heads right now should I go to stealth heads?
[Re: badblack68]
#59683
05/19/08 09:35 PM
05/19/08 09:35 PM
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Joined: Jan 2003
Posts: 1,240 Fairfield Maine
hemi4speed
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,240
Fairfield Maine
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Quote:
all Bob at Outrageously Vintage in Searsmont. He`ll tell you the real story on 906 heads verses "stealth" heads. www.outrageouslyvintage.com
it wont cost you a dime Ryan for the advice..and Bob is as honest and as knowlegeable as the come..
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Re: have 906 heads right now should I go to stealth hea
[Re: Cyl.Porter]
#59686
05/19/08 11:28 PM
05/19/08 11:28 PM
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Joined: Nov 2005
Posts: 15,118 85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,118
85086
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But will the stealth heads work on a 383? or are the valves too big?
56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: have 906 heads right now should I go to stealth hea
[Re: moparpollack]
#59688
05/20/08 07:53 AM
05/20/08 07:53 AM
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Joined: Jan 2003
Posts: 74,911 U.S.S.A.
JohnRR
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I Win
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Quote:
But will the stealth heads work on a 383? or are the valves too big?
they will be fine on that bore size , adding a notch to unshroud the valves like the factory did on the max wedge engines in 63/64 would help ,but is probably not necessary
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Re: have 906 heads right now should I go to stealth hea
[Re: Mr.Yuck]
#59691
05/20/08 11:36 AM
05/20/08 11:36 AM
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Joined: Jan 2003
Posts: 74,911 U.S.S.A.
JohnRR
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I Win
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Quote:
However you can pick up a set of ported iron heads for 3-500.
i'll buy all the sets you have for that .
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Re: have 906 heads right now should I go to stealth heads?
[Re: Stanton]
#59694
05/20/08 01:19 PM
05/20/08 01:19 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!
Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!
As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!
If he doesn't plan on building a 600 Hp motor why should he spend over 1k on a set of heads? Why does everybody need aluminum heads? If I was going to build an engine that required those flow numbers sure I'd buy a set. But if I building a simple 440 or 383 for fun and a few track dates I'll save the $$$ for something else.
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Re: have 906 heads right now should I go to stealth heads?
[Re: 79machocharger]
#59695
05/20/08 02:24 PM
05/20/08 02:24 PM
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Joined: Apr 2003
Posts: 3,968 North Riverside IL & Lowell IN
GTXKen
super gas
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super gas
Joined: Apr 2003
Posts: 3,968
North Riverside IL & Lowell IN
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All good points above. I say fit the parts to the budget no matter what it is. If you can swing the Stealth heads go for it, if not look for some already worked 906 heads. If you have to rework your heads to the tune of new seats, valves and a valve job then I think you are close enough to where the smart money in on the stealth heads. If you have a bigger budget then go for an indy head and so on... Don't spend more than you can afford, you don't need to. And don't spend 75% of the cost of a new part reconditioning a new one. ken
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Re: have 906 heads right now should I go to stealth heads?
[Re: Mr.Yuck]
#59696
05/20/08 02:35 PM
05/20/08 02:35 PM
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Joined: Jan 2003
Posts: 451 So. Cal. For Now But Texas Bou...
69sixpackbee
mopar
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mopar
Joined: Jan 2003
Posts: 451
So. Cal. For Now But Texas Bou...
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I'll throw in my $.02.
I took delivery of one of the first sets of stealths. Took them all apart and checked them THOROUGHLY. Not bad. I checked each valve with Dykem to confirm seat sealing. A few spins with the hand lapper showed all but one were spot on. After a few trips to the head surfacing machine I dialed in my chambers to 74'cc. I then started blending in the already ample (stock-ish form) bowls to the valve inserts as they (the inserts) protruded a bit into the bowls. I polished up the ports and knocked down the casting flash in them as well as an intake gasket match. I ended up removing .060" on the surfaces and .075" on the intake faces. Some of the valve cover rail was milled off in doing so but still have plenty of meat to seal the valve cover. After hand lapping the questionable valve, putting in my Isky 935-DR springs from my "906"'s and a brand new set of Comp Cams 10-degree retainers and locks, they were good to go. I figured I spent about 6hrs with the "Tootsie Rolls" which included relieving the intake pushrod areas for use with 3/8" rods and 1.6:1 rockers, another 2+ hrs for setup and about $200.00 in maching and parts costs and I am still a few bucks ahead. I don't think you can beat the cost factor. I too am not looking for a balz out killer RB just a decent runner in a stock-bodied "B" body with enough punch to turn some heads. I was running 12.70's before the head swap so soon I will send it down the track to see what improvements I made.
I went from 9.6:1 CR with the old iron heads to 10.5: 1 with the "Stealth's". I have a .048" quench (attainable using Cometic's and a stock deck ht.) and "Sixpack" 2355F TRW flattops. I have the .509/.292 cam "straight up", 3000 stall converter and 4.10"s in the Dana.
Hopefully I will drop the mill into the car this weekend.
Lots have been said about the Stealths but I still feel I got a good deal. No head swap is without a fair amount of work and exterraneous cash outlay. That is a given.
Good luck!
Bud
Last edited by 69sixpackbee; 05/20/08 02:37 PM.
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Re: have 906 heads right now should I go to stealth hea
[Re: Stanton]
#59697
05/20/08 03:25 PM
05/20/08 03:25 PM
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Joined: Jan 2003
Posts: 74,911 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,911
U.S.S.A.
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Quote:
I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!
Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!
As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!
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Re: have 906 heads right now should I go to stealth heads?
[Re: 79machocharger]
#59698
05/20/08 03:59 PM
05/20/08 03:59 PM
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Joined: Feb 2003
Posts: 1,142 Tucson, AZ
cruzin
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super stock
Joined: Feb 2003
Posts: 1,142
Tucson, AZ
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79machocharger,
Perhaps the following will be useful in your decision. I helped my buddy change the heads (906 w/larger valves) on his 3900 lbs., 1968 440 RT recently. His motor consist of 10:1, Lunati Voodoo #60302 262-268 cam, Performer RPM intake, BG 750 Mighty Demon, headers, 727 w/3000 stall, 3:55 SG.
The 906s that were removed were in good shape and had upgraded springs. Heads were rebuilt a little more than 1 year ago. On went the Stealth heads using prior rocker assembly (roller 1.5). Stealth heads were untouched and simply bolted on. Timing is 36 total.
In March the car went 13.9. May 2, car ran 13.55. I believe the mph was up 3 or 4 mph with the new heads. Car is more responsive with the new heads. Weight dropped poundage off the front end too.
Hope this helps.
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Re: have 906 heads right now should I go to stealth heads?
[Re: cruzin]
#59699
05/20/08 04:12 PM
05/20/08 04:12 PM
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Joined: Oct 2004
Posts: 5,443 ME
79machocharger
OP
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OP
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Joined: Oct 2004
Posts: 5,443
ME
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Thanks for all the info guys, I decided to go with the stealth heads. I'm building a pretty healthy 440 and wanted somthing that would would work real nice with it and it sounds like these will be the better bet for me between the two .
Last edited by 79machocharger; 05/20/08 04:30 PM.
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Re: have 906 heads right now should I go to stealth heads?
[Re: 79machocharger]
#59700
05/20/08 04:48 PM
05/20/08 04:48 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
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Too Many Posts
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Posts: 21,318
Manitoba, Canada
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I went with the stealth heads for my build as well. I'm still not sure if it was the right choice, but it's done. I didn't want to have to deal with spending the $ shipping a set of spare stock heads out to a trusted head porter, having him port and rebuild the heads and shipping them back. Probably would have spent the same in the end either way. I'm kind of wondering whether I should have just saved my money and went with a set of e-victors instead, but they may have been a little overkill. At the end of the day, there's more than one way to skin a cat so do it however you want. I agree, not everyone needs aluminum heads, but these days 500hp is as impressive as 400hp was 10 years ago, so everyone wants to keep up with the times. And for those #'s, a set of unported stock valve heads won't do it.
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Re: have 906 heads right now should I go to stealth heads?
[Re: cruzin]
#59701
05/20/08 07:00 PM
05/20/08 07:00 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
79machocharger,
Perhaps the following will be useful in your decision. I helped my buddy change the heads (906 w/larger valves) on his 3900 lbs., 1968 440 RT recently. His motor consist of 10:1, Lunati Voodoo #60302 262-268 cam, Performer RPM intake, BG 750 Mighty Demon, headers, 727 w/3000 stall, 3:55 SG.
The 906s that were removed were in good shape and had upgraded springs. Heads were rebuilt a little more than 1 year ago. On went the Stealth heads using prior rocker assembly (roller 1.5). Stealth heads were untouched and simply bolted on. Timing is 36 total.
In March the car went 13.9. May 2, car ran 13.55. I believe the mph was up 3 or 4 mph with the new heads. Car is more responsive with the new heads. Weight dropped poundage off the front end too.
Hope this helps.
main problem w/ that set-up is the 3.55's You'd think it'd run high 12's low 13's w/o the high end heads. Probably be better off with a different cam and lower stall. My bone stock 67 GTX (except for summit 488 cam) w/ 3.55's on radials thru logs went 13.86-13.90
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Re: have 906 heads right now should I go to stealth heads?
[Re: Stanton]
#59702
05/20/08 07:11 PM
05/20/08 07:11 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!
Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!
As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!
yup.. nothin' like some good ole iron heads opening a can of whoop butt against some eddies, stealths, or whatever. BELIEVE me my friend.. 90% of the people here get aluminum heads just to be cool.. power is secondary.
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Re: have 906 heads right now should I go to stealth heads?
#59703
05/20/08 07:19 PM
05/20/08 07:19 PM
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Joined: Jun 2006
Posts: 5,155 CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,155
CT
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Quote:
Quote:
I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!
Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!
As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!
yup.. nothin' like some good ole iron heads opening a can of whoop butt against some eddies, stealths, or whatever. BELIEVE me my friend.. 90% of the people here get aluminum heads just to be cool.. power is secondary.
Lots of people running Eddie RPMs on a 450 hp 440 with a broom stick for a cam, whats the point? Lots of guys turning 500 hp with irons. The aluminums are superior but it seems like alot of people that have them dont even need them, the guys whos combo itd really be good for have the Irons because they dont have the cash. I just hate when I go to a car show and see a 440 with aluminum heads and ask about the cam and if the motor is dynoed or not, and its a very mild combo. I get all excited for a 550 hp mill and am saddened. For what its worth a guy with an IRON headed 383 at my local cruise I chatted with maybe two weeks ago said his 383 with 906s and the regular street/strip specs dynoed at 460 hp and almost 500 ft lbs of torque. Hes gonna bring the cam card and dyno sheet next time he comes because he didnt remember the specs on the cam.
I tend to wonder if the irons are really better suited on a 383 than the aluminum heads in most applcations. Probably not, but I still wonder.
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: have 906 heads right now should I go to stealth heads?
[Re: 79machocharger]
#59704
05/20/08 08:19 PM
05/20/08 08:19 PM
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Joined: Jan 2003
Posts: 5,044 At a gas station near you
badblack68
master
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master
Joined: Jan 2003
Posts: 5,044
At a gas station near you
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Quote:
Thanks for all the info guys, I decided to go with the stealth heads. I'm building a pretty healthy 440 and wanted somthing that would would work real nice with it and it sounds like these will be the better bet for me between the two .
Just a suggestion, take 10 minutes and call Bob at Outrageously Vintage BEFORE you write the check on the stealth heads. He`s a great guy and has been racing Mopars all his adult life. I`m sure you know him because Reed asked me how I got Bob to build me an engine.
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Re: have 906 heads right now should I go to stealth heads?
[Re: badblack68]
#59705
05/20/08 08:26 PM
05/20/08 08:26 PM
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Joined: Nov 2007
Posts: 21,808 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,808
Kirkland, Washington
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Quote:
Quote:
Thanks for all the info guys, I decided to go with the stealth heads. I'm building a pretty healthy 440 and wanted somthing that would would work real nice with it and it sounds like these will be the better bet for me between the two .
Just a suggestion, take 10 minutes and call Bob at Outrageously Vintage BEFORE you write the check on the stealth heads. He`s a great guy and has been racing Mopars all his adult life. I`m sure you know him because Reed asked me how I got Bob to build me an engine.
And keep in mind you're taking to a guy who's got a significant portion of his business in refurbishing iron heads. Must be ruff these days with the other choices out there!
Hey, I run ported 906's on my car, I will use them till something happens, but I will NOT put any money into them. It will be the perfect opportunity to UPGRADE to AL heads!
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Re: have 906 heads right now should I go to stealth heads?
[Re: Stanton]
#59708
05/22/08 10:39 PM
05/22/08 10:39 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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sooo you sold a pair of 906's for $475? who are these class racers. i got 2 pairs i'll let go for $400/ pair. tanked, big valve, etc.
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