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stealth vs 906 Heads #637376 03/12/10 09:56 AM 03/12/10 09:56 AM
Joined: Aug 2009 Posts: 324 GA R roy2345 OP enthusiast
roy2345 OP enthusiast R Joined: Aug 2009 Posts: 324 GA	I am currently having my engine built and was curious is changing my 906 Heads worth it for my application. I have the voodo cam 60301 and it's bored .030. I have the HP manifolds as well with a Edl performer intake and 750 holley. I plan to drive mine more on the streets with the occasional horse play and tire burn out. I ask because the guy doing my Machine work is charging around 3 cenos for the 3 angle valve job and all. And if I had the 906 ported a little would that be equal performance to the stealths? Just curious.

Re: stealth vs 906 Heads [Re: roy2345] #637377 03/12/10 10:04 AM 03/12/10 10:04 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	well since you are using logs and a Performer intake and not an RPM I see no reason to port or buy the stealth heads. That's not much of a cam so I think your 906 heads and current work will be fine. You can run 12's with stock 906 heads on a very mild 440, so I think you'll be fine. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: stealth vs 906 Heads [Re: Mr.Yuck] #637378 03/12/10 10:09 AM 03/12/10 10:09 AM
Joined: Aug 2009 Posts: 324 GA R roy2345 OP enthusiast
roy2345 OP enthusiast R Joined: Aug 2009 Posts: 324 GA	oops its the lunati 60302 cam. So I would never really even tap into that level of performance with my cam etc to even notice a port job on my 906 heads?

Re: stealth vs 906 Heads [Re: roy2345] #637379 03/12/10 10:16 AM 03/12/10 10:16 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	porting is always a good idea, but since you are using non-performace exhaust and an intake not much better than stock I doubut you will see the advantage. If you went w/ headers, RPM or S/D intake and 3.91's you'd see the difference. I ran 12.90's w/ stock 906's on mild 440. The valve job and angle cut will help, also if you plan on adding to the build later the porting will help. The problem is the cost. It's probably going to be cheaper just to buy the stealth heads in the long run. I mean you reach $800 pretty quick when you start grinding, plus it already has 2.14/1.81 valves. 906's have 2.08/1.74 valves. If this is a car you just want to beat around the street with I'd just stick with your fresh 906's.

Re: stealth vs 906 Heads [Re: Mr.Yuck] #637380 03/12/10 01:39 PM 03/12/10 01:39 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Stealths are going to flow more than a mildly tweaked set of 906's. I agree with swingin, your combo is too mild to benefit much from the stealths. I would leave your heads bone stock for now, don't invest anything into them. Then later on down the road if you choose to step up to more cam like the 60304, rpm intake, 850 carb, add a set of headers, then you'll be able to put the extra flow of aftermarket heads to use.

Re: stealth vs 906 Heads [Re: DaytonaTurbo] #637381 03/12/10 03:54 PM 03/12/10 03:54 PM
Joined: Aug 2009 Posts: 324 GA R roy2345 OP enthusiast
roy2345 OP enthusiast R Joined: Aug 2009 Posts: 324 GA	Thanks fellas! Yall have answered my questions. I'll hang in there with the 906's. My aluminum intake isn't much better performance then my stock intake?

Re: stealth vs 906 Heads [Re: roy2345] #637382 03/12/10 04:31 PM 03/12/10 04:31 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Thanks fellas! Yall have answered my questions. I'll hang in there with the 906's. My aluminum intake isn't much better performance then my stock intake? If it's a "Perfomer" it's better but not by much. The Performer RPM is the good one.

Re: stealth vs 906 Heads [Re: roy2345] #637383 03/12/10 05:09 PM 03/12/10 05:09 PM
Joined: Jan 2003 Posts: 7,497 Austin, TX HemiDave master
HemiDave master Joined: Jan 2003 Posts: 7,497 Austin, TX	Quote: because the guy doing my Machine work is charging around 3 cenos for the 3 angle valve job Do you mean C notes? a.k.a. $100 bills? Yes, stay with the stock heads for now. And the Performer RPM intake is the high performance one.. Dave

Re: stealth vs 906 Heads [Re: HemiDave] #637384 03/12/10 05:13 PM 03/12/10 05:13 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Quote: Quote: because the guy doing my Machine work is charging around 3 cenos for the 3 angle valve job Do you mean C notes? a.k.a. $100 bills? Yes, stay with the stock heads for now. And the Performer RPM intake is the high performance one.. Dave But basically a waste with stock flowing heads. In his case the intake manifold is not the bottleneck.

Re: stealth vs 906 Heads [Re: DaytonaTurbo] #637385 03/12/10 05:14 PM 03/12/10 05:14 PM
Joined: Jan 2003 Posts: 7,497 Austin, TX HemiDave master
HemiDave master Joined: Jan 2003 Posts: 7,497 Austin, TX	Quote: Quote: Quote: because the guy doing my Machine work is charging around 3 cenos for the 3 angle valve job Do you mean C notes? a.k.a. $100 bills? Yes, stay with the stock heads for now. And the Performer RPM intake is the high performance one.. Dave But basically a waste with stock flowing heads. In his case the intake manifold is not the bottleneck. But if he wants to start 'somewhere'..that or a nice used LD340... Dave Last edited by HemiDave; 03/12/10 05:15 PM.

Re: stealth vs 906 Heads [Re: HemiDave] #637386 03/12/10 05:21 PM 03/12/10 05:21 PM
Joined: Jul 2003 Posts: 6,343 SE PA. Q QuickBpBp master
QuickBpBp master Q Joined: Jul 2003 Posts: 6,343 SE PA.	Quote: But if he wants to start 'somewhere'..that or a nice used LD340... Dave That an awful lot of machine work to fit a small block intake to a big block there is better options..

Re: stealth vs 906 Heads [Re: QuickBpBp] #637387 03/12/10 05:25 PM 03/12/10 05:25 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Quote: But if he wants to start 'somewhere'..that or a nice used LD340... Dave That an awful lot of machine work to fit a small block intake to a big block there is better options.. CH4B - 440 goooood intake

Re: stealth vs 906 Heads [Re: Mr.Yuck] #637388 03/12/10 10:46 PM 03/12/10 10:46 PM
Joined: Aug 2009 Posts: 324 GA R roy2345 OP enthusiast
roy2345 OP enthusiast R Joined: Aug 2009 Posts: 324 GA	sorry it's the rpm performer intake for the 440....idle to 5600 rpm

Re: stealth vs 906 Heads [Re: roy2345] #637389 03/13/10 09:18 AM 03/13/10 09:18 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Get stealth heads before spending any money on iron. First it will be $300 for valve job and $200 for guides and $200 for new valves (a must IMO) and $100 for new valve springs + any port work and you still have 40 year old crack prone heads. You should have new retainers and keepers too Eddy heads are more but worth it as the stealths are well "Chinese".

Re: stealth vs 906 Heads [Re: Dodgem] #637390 03/14/10 08:29 PM 03/14/10 08:29 PM
Joined: Aug 2009 Posts: 324 GA R roy2345 OP enthusiast
roy2345 OP enthusiast R Joined: Aug 2009 Posts: 324 GA	Why would the 906's crack? They were fine when the engine was torn down other then valve guide seals.

Re: stealth vs 906 Heads [Re: roy2345] #637391 03/14/10 09:06 PM 03/14/10 09:06 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Cast iron has a tendency to get brittle with age and heat cycles.

Re: stealth vs 906 Heads [Re: Dodgem] #637392 03/14/10 11:08 PM 03/14/10 11:08 PM
Joined: Aug 2009 Posts: 2,042 Mooresburg, Tn ' '72CudaRacer top fuel
'72CudaRacer top fuel ' Joined: Aug 2009 Posts: 2,042 Mooresburg, Tn	Quote: Cast iron has a tendency to get brittle with age and heat cycles. Especially after you grind the snot out of them doing port work.

Re: stealth vs 906 Heads [Re: '72CudaRacer] #637393 03/14/10 11:33 PM 03/14/10 11:33 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	I do run ported 906's but if the Stealth heads had been out when I built my 440 I would have bought them. That said the 906's are holding up fine but I feel I could go faster with a nice aluminum head. Ron

Re: stealth vs 906 Heads [Re: '72CudaRacer] #637394 03/15/10 02:11 PM 03/15/10 02:11 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Quote: Quote: Cast iron has a tendency to get brittle with age and heat cycles. Especially after you grind the snot out of them doing port work.

Re: stealth vs 906 Heads [Re: Dodgem] #637395 03/15/10 05:25 PM 03/15/10 05:25 PM
Joined: Apr 2008 Posts: 212 Mid Michigan C Coronet-R/T-Rag enthusiast
Coronet-R/T-Rag enthusiast C Joined: Apr 2008 Posts: 212 Mid Michigan	All of my ported iron heads have cracked sooner or later. Usually right below the center exhaust ports. Those two exhaust valves are close together and get HOT!!! If you going to be in the hobby for a while, get the stealths. They will grow with you as your need for performance does (it's a sickness, just ask my wife).

Re: stealth vs 906 Heads [Re: Coronet-R/T-Rag] #637396 03/15/10 06:02 PM 03/15/10 06:02 PM
Joined: Feb 2009 Posts: 51 bristol tn J jbcuda member
jbcuda member J Joined: Feb 2009 Posts: 51 bristol tn	Mine done the same thing bout two months ago so I ordered stealths and hopefully get to put them on shortly they look great

Re: stealth vs 906 Heads [Re: jbcuda] #637397 03/15/10 06:38 PM 03/15/10 06:38 PM
Joined: Jun 2006 Posts: 5,162 CT GTX MATT master
GTX MATT master Joined: Jun 2006 Posts: 5,162 CT	Roy, I would go with the Stealths. One of the magazines tested a pretty average 440 back to back with 906 heads and the Edelbrocks, which flow in the range of the Stealths, probably just a little more. Anyway, it was a 440, 9:1, Comp XE268 (which is similar to your cam, just a tighter lobe seperation with 112 degrees and its 224/230 duration. Eddy RPM intake and 1 7/8 headers. They dynoed 399 with the 906 heads, and 473 ft lbs of torque. With the Eddies it was 456 horsepower and 514 ft lbs of torque. Peak torque was at the same RPM and peak horsepower went up only 200 rpm. I think even a stock HP engine would benefit 20-30 horse from Eddies or Stealths. Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street

Re: stealth vs 906 Heads [Re: GTX MATT] #637398 03/16/10 02:34 AM 03/16/10 02:34 AM
Joined: Aug 2009 Posts: 324 GA R roy2345 OP enthusiast
roy2345 OP enthusiast R Joined: Aug 2009 Posts: 324 GA	not porting the 906 just 3 angle valve job.

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