Previous Thread
Next Thread
Print Thread
Opinions on Stealth Heads Please #2663777
06/08/19 01:09 PM
06/08/19 01:09 PM
Joined: Jan 2003
Posts: 4,042
Danville, NH
M
Mopar_Mike Offline OP
master
Mopar_Mike  Offline OP
master
M

Joined: Jan 2003
Posts: 4,042
Danville, NH
I'm planning a mostly stock 440 build, probably in the 400-450hp range. 2355 forged pistons and under .500 hydraulic cam with stock rockers. What do you guys think about the aluminum stealth heads "out of the box"? Have people had
good luck with them or stay away?
Thanks!

Last edited by Mopar_Mike; 06/08/19 01:12 PM.

RS23L7 440 4-Speed
RS27L7 440 727
WS27L7 440 727
WS23L7 484 Hemi - 727 - Dana 4.10

Re: Opinions on Stealth Heads Please [Re: Mopar_Mike] #2663781
06/08/19 01:35 PM
06/08/19 01:35 PM
Joined: Dec 2008
Posts: 1,215
okla.
sam64 Offline
pro stock
sam64  Offline
pro stock

Joined: Dec 2008
Posts: 1,215
okla.
Just get the Trick flow 240's and be done.

Re: Opinions on Stealth Heads Please [Re: sam64] #2663785
06/08/19 01:49 PM
06/08/19 01:49 PM
Joined: Sep 2004
Posts: 9,565
RI Deep in the rust belt
chargervert Offline
master
chargervert  Offline
master

Joined: Sep 2004
Posts: 9,565
RI Deep in the rust belt
If you are looking for stock appearance,they are the only game in town. If appearance is not an issue,then there are other options. As far as out of the box,and bolting the Source heads,it's hit or miss,so I have read. I would recommend having a shop check them out before installing them. I have heard of guides being to tight,and one instance of a porosity issue. That could have just been one bad casting.


70 Charger R/T SE 472 Hemi 70 Charger R/T convertible 70 Charger R/T V Code Sixpack 69 Charger R/T SE Sunroofcar 68 Charger 383 68 Charger 318 71 Charger R/T 70 Challenger convertible 71 Challenger convertible 71 Cuda 340 09 Challenger R/T Classic
Re: Opinions on Stealth Heads Please [Re: chargervert] #2663802
06/08/19 03:13 PM
06/08/19 03:13 PM
Joined: Dec 2013
Posts: 2,751
Wichita
G
GY3 Offline
master
GY3  Offline
master
G

Joined: Dec 2013
Posts: 2,751
Wichita
I would never run ANY head out of the box without my machinist checking them over first.

I have Stealths but they have different springs, locks and retainers. They have over 5,700 miles, lots of dragstrip passes and still run great.

We make 600 n/a and ran a 150 shot through them some last year. We recently jetted up to a 200 shot and haven't been able to get a clean pass at the track.

That said, a buddy bought Trickflow 240's and loves them!


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's
10.40 @ 130mph with a 200 shot of nitrous.

Re: Opinions on Stealth Heads Please [Re: GY3] #2663809
06/08/19 04:48 PM
06/08/19 04:48 PM
Joined: Jan 2003
Posts: 19,814
Niles , Ohio
T
therocks Offline
Its Lost
therocks  Offline
Its Lost
T

Joined: Jan 2003
Posts: 19,814
Niles , Ohio
My Stealths are the fiorst ones made.No problems after all these years.I did have locks springs,retainers changed because of my .588 solid cam.Machinist who was a perfectionest said they all looked good.He did back cut the valves and open them up some.Dont matter what head you buy they shopuld be checked.Heard quite a few Eddys that werent right out of the box.Rocky


Chrysler Firepower
Re: Opinions on Stealth Heads Please [Re: therocks] #2663819
06/08/19 05:41 PM
06/08/19 05:41 PM
Joined: Jan 2003
Posts: 12,261
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 12,261
So. Burlington, Vt.
I’ve had several sets come through my shop in the last 18 months or so.

From strictly a “functionality” standpoint, none of the ones I’ve had here in the last few years had anything wrong with them to the point where they would have caused any “problems”.
Sure, the valve job and the way the seats transition into the bowls leaves some flow on the table....... but that wont cause any issues that would leave you on the side of the road.

I can’t think of a single set of aluminum Chinese heads I’ve prepped, for any engine platform, that had the guide clearance too tight.
If anything, they’re generally on the loose side.
Yes...... they probably should be checked....... but tight guides wouldn’t be something that typically needed correcting on these heads.

Btw, I haven’t looked at their website in a while....... but the advertised flow #’s at one point were pure fiction.

They are typically in the 260/185@.600 range ootb.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Opinions on Stealth Heads Please [Re: Mopar_Mike] #2663832
06/08/19 06:40 PM
06/08/19 06:40 PM
Joined: Jan 2012
Posts: 1,846
Stuttgart, Arkansas
rickseeman Offline
top fuel
rickseeman  Offline
top fuel

Joined: Jan 2012
Posts: 1,846
Stuttgart, Arkansas
Originally Posted by Mopar_Mike
I'm planning a mostly stock 440 build, probably in the 400-450hp range. 2355 forged pistons and under .500 hydraulic cam with stock rockers. What do you guys think about the aluminum stealth heads "out of the box"? Have people had
good luck with them or stay away?
Thanks!


I think they would be the best head for you given what you are building.


2011 Drag Pak Challenger
Re: Opinions on Stealth Heads Please [Re: rickseeman] #2663834
06/08/19 06:57 PM
06/08/19 06:57 PM
Joined: Jan 2003
Posts: 13,928
So Near, Yet So Far
topside Offline
I Live Here
topside  Offline
I Live Here

Joined: Jan 2003
Posts: 13,928
So Near, Yet So Far
I've used Stealths on one stock-ish appearing BB and Eddys on another.
Both cases, I upgraded to double springs & retainers, had them checked over, including guides, and port clean-up & matching.
No real problems with either, as stated the flow #s are optimistic until worked on.
I'd do another set of Stealths without reservation for another stock-appearing build.
OOTB is something I just don't do, but plenty of guys have with Stealths & Eddys.
Both engines were street-strip deals, neither was going for the best/biggest head or max HP possible.

Re: Opinions on Stealth Heads Please [Re: Mopar_Mike] #2663907
06/09/19 02:49 AM
06/09/19 02:49 AM
Joined: May 2008
Posts: 5,193
Aurora, Colorado
451Mopar Offline
master
451Mopar  Offline
master

Joined: May 2008
Posts: 5,193
Aurora, Colorado
I have a set on the convertible. My castings were pretty nice looking. No issues with the valve guides. As mentioned, the port to seat transition is not great from a performance point, but nothing that would be an issue other than port flow. In my application, I did not use the springs and retainers, because I went hydraulic roller cam. I did use the springs and retainers later on a friends 440 with 906 heads, and the Mopar 292/0.509" cam.
I wanted a but better flow, so did some mild porting on the heads and a performance valve job. I think after the work, they flowed around the 290 cfm advertised. We did not check the out of the box flow, but I think I read another post where is is around 260-270 cfm out of the box?

Re: Opinions on Stealth Heads Please [Re: 451Mopar] #2663937
06/09/19 08:04 AM
06/09/19 08:04 AM
Joined: May 2019
Posts: 617
nowhere
S
Sniper Offline
We know who you are
Sniper  Offline
We know who you are
S

Joined: May 2019
Posts: 617
nowhere
comparing flow numbers from different benches isn't useful, some are more optimistic than others. Comparing changes using the same bench is.


You don't know anything
Re: Opinions on Stealth Heads Please [Re: Sniper] #2663942
06/09/19 08:28 AM
06/09/19 08:28 AM
Joined: Jan 2003
Posts: 4,042
Danville, NH
M
Mopar_Mike Offline OP
master
Mopar_Mike  Offline OP
master
M

Joined: Jan 2003
Posts: 4,042
Danville, NH
Thanks all for your responses. Seems having them checked out would be the right thing to do. I am not looking to do anything fancy with the engine and I want stock plug angles and ports etc. Other than having them checked out, would me doing a very mild port/smoothing on the intake and exhaust be a good idea? Also, with a .480-.490 lift cam would keeping the stock spring and 7 degree locks be ok?


RS23L7 440 4-Speed
RS27L7 440 727
WS27L7 440 727
WS23L7 484 Hemi - 727 - Dana 4.10

Re: Opinions on Stealth Heads Please [Re: Mopar_Mike] #2663963
06/09/19 09:33 AM
06/09/19 09:33 AM
Joined: Jan 2003
Posts: 12,261
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 12,261
So. Burlington, Vt.
Smoothing the ports is worth nothing.

There are some obvious issues under the valve seats and with the short side radius.

Take care of those two things, leave the rest of the port alone.

All the parts are fine for something like a .480 lift hyd FT cam.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads

Cleanmedia
Advertisement
Sponsored Link
Moparts Newest Topics
search for older cars for sale adds
by ch1ll. 10/14/19 01:40 AM
FWD bad strut bushing .... jsta replace ... ???
by Doc Fiberglass. 10/13/19 10:48 PM
Roll cage mounted switches
by cdwmotorsports. 10/13/19 09:08 PM
Moparts Recent Posts
TF270 accessories
by MestocX. 10/14/19 02:42 AM
E-body Extended Rear Bump Stops
by HUSTLESTUFF. 10/14/19 01:56 AM
CA PSPS Power Outage
by srt. 10/14/19 01:52 AM
search for older cars for sale adds
by ch1ll. 10/14/19 01:40 AM

Powered by UBB.threads™ PHP Forum Software 7.7.1