Re: Question about Aluminum heads.
[Re: Biginchmopar]
#1039719
07/25/11 12:39 PM
07/25/11 12:39 PM
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Joined: Nov 2005
Posts: 808 mckinney texas
shoebox
super stock
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super stock
Joined: Nov 2005
Posts: 808
mckinney texas
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I went with the stealth heads. Price was more in line with my Budget. They look good and just make sure to go through them And check guides etc..
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Re: Question about Aluminum heads.
[Re: 68CoronetRT]
#1039720
07/25/11 01:10 PM
07/25/11 01:10 PM
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Joined: Jan 2003
Posts: 6,531 Jacksonville, FL
Chris2581
master
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master
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
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I went with Stealths.Everything checked great,I did change springs.locks and retainers to Comp Cams stuff.
Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.
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Re: Question about Aluminum heads.
[Re: Biginchmopar]
#1039721
07/25/11 02:05 PM
07/25/11 02:05 PM
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Joined: Dec 2009
Posts: 1,074 detroit, mi
POS Dakota
super stock
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super stock
Joined: Dec 2009
Posts: 1,074
detroit, mi
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Quote:
The Pro Comps are Edelbrock knock off's. Good castings and everything I have seen looks to be real good.
Good Luck
I've been waiting to see the smallblock heads they were supposedly going to make...
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Re: Question about Aluminum heads.
[Re: 1Fast340]
#1039723
07/25/11 03:12 PM
07/25/11 03:12 PM
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Joined: Aug 2004
Posts: 1,047 Arizona
68CoronetRT
OP
super stock
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OP
super stock
Joined: Aug 2004
Posts: 1,047
Arizona
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I am wanting to build a quench motor that will produce about 500 horsepower for street use. The car is a 68 Coronet R/T and has all the torque boxes of a hemi car plus the Dana 60 Suregrip with 3:54 gears, 18 spline 4 speed, transmission. I have an Edlebrock RPM dual plane intake, a Holley 870 Street Avenger carburetor. Standard stroke crank, stock rods (all sized and rotating assembly balanced), .040 bore with TRW flat top 10:1 pistons, Felpro .039 Head Gasket. I have a new set of CAT 1.6 aluminum roller rockers and shafts that have been in the box for a few years now but would need to change them out for offset rockers if I go with the Engine Works or Procomp heads.
Plan to run headers with 1 7/8" primaries into 2 1/2" exhaust pipes and turbo mufflers.
I have not selected a camshaft as yet either.
Other new parts on hand: Ferrea SS Valves 2.14/1.81 Viton Valve seals OEM style "Hemi" Valve springs Keepers & locks but I can't remember what they are at the moment.
Last edited by 68CoronetRT; 07/25/11 03:17 PM.
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Re: Question about Aluminum heads.
[Re: 1Fast340]
#1039724
07/25/11 03:15 PM
07/25/11 03:15 PM
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Joined: Jan 2003
Posts: 21,123 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,123
Niles , Ohio
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My machinist had a set of PCs at the shop.Said they were a total POS.I have Stealths on my 440.Fourthth year and no problems.I also changed to Comp spring,retainers,and keepers for the .588 solid cam.Machinist just relapped valves to satisfy his perfectionist ways and back cut them.Rocky
Chrysler Firepower
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Re: Question about Aluminum heads.
[Re: 68CoronetRT]
#1039726
07/25/11 05:17 PM
07/25/11 05:17 PM
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Joined: Jan 2003
Posts: 75,282 A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,282
A gulag near you.
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Quote:
I am wanting to build a quench motor that will produce about 500 horsepower for street use. The car is a 68 Coronet R/T and has all the torque boxes of a hemi car plus the Dana 60 Suregrip with 3:54 gears, 18 spline 4 speed, transmission. I have an Edlebrock RPM dual plane intake, a Holley 870 Street Avenger carburetor. Standard stroke crank, stock rods (all sized and rotating assembly balanced), .040 bore with TRW flat top 10:1 pistons, Felpro .039 Head Gasket. I have a new set of CAT 1.6 aluminum roller rockers and shafts that have been in the box for a few years now but would need to change them out for offset rockers if I go with the Engine Works or Procomp heads.
Plan to run headers with 1 7/8" primaries into 2 1/2" exhaust pipes and turbo mufflers.
I have not selected a camshaft as yet either.
Other new parts on hand: Ferrea SS Valves 2.14/1.81 Viton Valve seals OEM style "Hemi" Valve springs Keepers & locks but I can't remember what they are at the moment.
The procomp head is a ripoff of the Ebrock Victor head, a little overkill for this build.
Buy the Ebrock, RPM or the MP 452 or the stealths and lose those POS cat rockers anyway...
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Re: Question about Aluminum heads.
[Re: JohnRR]
#1039727
07/25/11 06:24 PM
07/25/11 06:24 PM
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Joined: Aug 2004
Posts: 1,047 Arizona
68CoronetRT
OP
super stock
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OP
super stock
Joined: Aug 2004
Posts: 1,047
Arizona
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Quote:
The procomp head is a ripoff of the Ebrock Victor head, a little overkill for this build.
Buy the Ebrock, RPM or the MP 452 or the stealths and lose those POS cat rockers anyway...
So I take it the CAT rockers have not proven themselves any good in the 5 years since I bought them? Hard to believe this project has been on hold that long.
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Re: Question about Aluminum heads.
[Re: JohnRR]
#1039728
07/25/11 06:39 PM
07/25/11 06:39 PM
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Joined: Dec 2006
Posts: 3,401 Pa
Hot 340
master
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master
Joined: Dec 2006
Posts: 3,401
Pa
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Quote:
Quote:
I am wanting to build a quench motor that will produce about 500 horsepower for street use. The car is a 68 Coronet R/T and has all the torque boxes of a hemi car plus the Dana 60 Suregrip with 3:54 gears, 18 spline 4 speed, transmission. I have an Edlebrock RPM dual plane intake, a Holley 870 Street Avenger carburetor. Standard stroke crank, stock rods (all sized and rotating assembly balanced), .040 bore with TRW flat top 10:1 pistons, Felpro .039 Head Gasket. I have a new set of CAT 1.6 aluminum roller rockers and shafts that have been in the box for a few years now but would need to change them out for offset rockers if I go with the Engine Works or Procomp heads.
Plan to run headers with 1 7/8" primaries into 2 1/2" exhaust pipes and turbo mufflers.
I have not selected a camshaft as yet either.
Other new parts on hand: Ferrea SS Valves 2.14/1.81 Viton Valve seals OEM style "Hemi" Valve springs Keepers & locks but I can't remember what they are at the moment.
The procomp head is a ripoff of the Ebrock Victor head, a little overkill for this build.
Buy the Ebrock, RPM or the MP 452 or the stealths and lose those POS cat rockers anyway...
Always buy overkill when it comes to heads. When the next build happens he wont have to buy twice.
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Re: Question about Aluminum heads.
[Re: lewtot184]
#1039733
07/25/11 09:28 PM
07/25/11 09:28 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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Im Very happy with my Stealth head purchase. I like the fact that they look stock. I used them out of the box, just adding comp 10* locks and retainers, and the double springs that came with my Engle cam. My mild 451 street combo makes right around 500 HP with them.
The raised Port, Offset rocker design of the P-C's is more of a race head design than a street head. I'm sure they would work for you just fine also, although you are more likely to run into header fitment issues with an RB block and raised port heads in a stock chassis engine bay (???).
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: Question about Aluminum heads.
[Re: POS Dakota]
#1039737
07/26/11 12:43 AM
07/26/11 12:43 AM
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Joined: Apr 2009
Posts: 3,433 Toronto
mshred
master
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master
Joined: Apr 2009
Posts: 3,433
Toronto
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Quote:
Quote:
The Pro Comps are Edelbrock knock off's. Good castings and everything I have seen looks to be real good.
Good Luck
I've been waiting to see the smallblock heads they were supposedly going to make...
yea me too...they were in their catalog, but havent heard or seen anything about them since then
to the OP, if you are looking for a cam I would give Brian at IMM engines a call. He can spec you an awesome custom grind that will work for YOUR setup and it wont set you back any more than an off the shelf grind. Top notch guy who knows his chit and is willing to help
good luck
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Re: Question about Aluminum heads.
[Re: ahy]
#1039738
07/26/11 01:55 AM
07/26/11 01:55 AM
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Joined: Aug 2004
Posts: 1,047 Arizona
68CoronetRT
OP
super stock
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OP
super stock
Joined: Aug 2004
Posts: 1,047
Arizona
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Quote:
For the cam, can you share a little more on the setup and your goals? Planned driving... street, strip, both? Compression ratio planned. From your post its a 4 speed, what rear ratio and tire size? How much "personality" do you want in the engine (lopey idle for example). Are you running power brakes?
Its a muscle car and I want it to sound like one. 3:54 gears in a Dana 60 I live in Arizona around the 5000' altitude mark so I am thinking with aluminum heads 10.5 or 11 to 1 on the compression ratio. 91 octane pump gas. Haven't bought the wheels and tires yet but thinking 15" Magnum 500 for the wheels 28" on the tires???
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Re: Question about Aluminum heads.
[Re: 68CoronetRT]
#1039739
07/26/11 02:10 AM
07/26/11 02:10 AM
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Joined: Dec 2003
Posts: 1,153 Adrian, Mi
pro6pakRR
mopar addict
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mopar addict
Joined: Dec 2003
Posts: 1,153
Adrian, Mi
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I put the Edelbrock's on my 440 right out of the box.Have a mopar 590 cam Crane 1.6 roller rockers and a 6bbl.Been on car for 5 years and everything still works great.car has run 11.53@117 at #3895.
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Re: Question about Aluminum heads.
[Re: 68CoronetRT]
#1039742
07/26/11 10:17 AM
07/26/11 10:17 AM
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Joined: Jan 2003
Posts: 75,282 A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,282
A gulag near you.
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Quote:
I appreciate all the input. I am going with the Stealth heads for now since they seem to fit my plans better and require less "tweaking" and add-ons.
Maybe I should get the bare heads and have a shop install my valves and springs while they check out the head.
Any recommendations for a camshaft for this set up?
You can't buy the stealths bare anymore , a lot has changed in 5 years .
As far as those rockers , NEW Cats MAY be better??? They have/had an issue with the shaft that the roller tip rides on being brittle and breaking, the design of the rocker can pop the valve locks free and you'll know what happens next. One place to NOT SKIMP is on rocker gear, their failure can be very expensive to repair.
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Re: Question about Aluminum heads.
[Re: Chris'sBarracuda]
#1039743
07/26/11 10:21 AM
07/26/11 10:21 AM
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Joined: Aug 2004
Posts: 1,047 Arizona
68CoronetRT
OP
super stock
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OP
super stock
Joined: Aug 2004
Posts: 1,047
Arizona
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Quote:
Look for a good set of used Eddys, or something like it. They're always for sale because of guys stepping up..
Chris..
I have been watching for a used set but so far nothing "undamaged" as popped up. I'll keep an eye out as I am not under a time crunch - just want to get my car back on the road again.
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Re: Question about Aluminum heads.
[Re: 68CoronetRT]
#1039744
07/26/11 10:23 PM
07/26/11 10:23 PM
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Joined: Jan 2007
Posts: 7,664 IN
ahy
master
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master
Joined: Jan 2007
Posts: 7,664
IN
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I believe 10.5-11.0 compression will work at 5000'. May be a bit high if you ever drop down in altitude. For the cam, I'll suggest something in the range of 230 degrees intake duration at .050". Hot enough for good power and sound but not a pain to drive. Comp and Hughes both have good offerings in that range. Assuming you want a hydraulic FT the Comp "Extreme Energy High Lift" or Hughes hydraulic FT would fit the bill. Both are fast rate cams and would need good adjustable rockers. A link to Mancini where both are advertised is below. 230 degrees at .050" would be borderline for power brakes. As posted above, an engine builder is a great resource to help pick a cam. http://chucker54.stores.yahoo.net/hughesengines.html
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Re: Question about Aluminum heads.
[Re: 68CoronetRT]
#1039747
07/26/11 11:16 PM
07/26/11 11:16 PM
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Joined: Dec 2006
Posts: 3,667 Arizona
Chris'sBarracuda
master
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master
Joined: Dec 2006
Posts: 3,667
Arizona
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Quote:
Quote:
Look for a good set of used Eddys, or something like it. They're always for sale because of guys stepping up..
Chris..
I have been watching for a used set but so far nothing "undamaged" as popped up. I'll keep an eye out as I am not under a time crunch - just want to get my car back on the road again.
Put an ad in the parts wanted section..
Chris..
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Re: Question about Aluminum heads.
[Re: 68CoronetRT]
#1039748
07/27/11 03:47 AM
07/27/11 03:47 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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The Engine works heads looks like re-packaged pro-comp heads, which are a copy of the Edelbrock Victor heads. These heads have smaller 72cc chambers than the Edelbrock RPM or 440 source stealth heads 80-84cc chambers, so they may bump your compression to about 11.5:1 (if using a flat top like the KB237, or TRW2355.) The RPM/stealth heads are about 10.25 to 10.5:1 compression with the same pistons. The above compression ratios assume the block is milled to zero deck, and uses a fel-pro 1009 head gasket (9.9cc.)
The pro-comp/Victor heads also require 0.600"+ offset intake rocker arms, and a valley tray.
The RPM/Stealth heads are closer to a bolt on, using stock rocker offsets, and you can use a stock intake / valley pan gasket.
The RPM heads may flow a bit better out of the box, but the angled spark plugs can also be a problem with some headers and exhaust manifolds. The Stealth heads have straight/stock location spark plugs, so that should not be an issue. The Stealth heads also look a bit like a stock head when painted.
All the heads mentioned require reduced wrench size head bolts or head studs, and 3/4" reach spark plugs.
The pushrod clearance needs to be checked with any of these heads. Depending on the rocker offset and ratio, the pushrod holes usually need to be enlarged for clearance.
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