Weiand Stealth or ZZ4 manifold
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,663
Likes: 3
From: Palm Harbor FL
Weiand Stealth or ZZ4 manifold
Which would be a better manifold for a 383 that should put out 420HP? I have hood clearance issues in my 1984 Camaro Z28, so I can't use the RPM air-gap. I had heard good things about the Weiand Stealth and the ZZ4 manifold. Can these both support a 420HP engine? Which is the better manifold?
Any opinions?
Thanks.
Any opinions?
Thanks.
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,663
Likes: 3
From: Palm Harbor FL
It would be this one:
http://www.holley.com/HiOctn/ProdLin...AMSM/8016.html
I didn't see any others on their web site.
http://www.holley.com/HiOctn/ProdLin...AMSM/8016.html
I didn't see any others on their web site.
Race Director
Joined: Jun 2000
Posts: 10,045
Likes: 675
From: FL
I was flipping through Dave Vizard's book "How to Build Performance SBC's on a Budget" at Barnes and Noble yesterday and noticed he is a big fan of the Weiand 7525. He says that it has a much torque as a dual plane down low and as much HP as a single plane up high. Only single plane I have every seen with a spread bore pattern, hot air choke and EGR provisions.
http://www.holley.com/HiOctn/ProdLin...AMSM/7525.html
Might work well for a 383 with all that natural torque down low anyway.
http://www.holley.com/HiOctn/ProdLin...AMSM/7525.html
Might work well for a 383 with all that natural torque down low anyway.
Advanced
Joined: Jun 2004
Posts: 96
Likes: 0
From: portland TN
The 7525 is obsolete.
I would use the 8004 before the 8016. I have seen mag articles where it makes good power.
I use the 7547-1 and it clears all day and is a very low rise single plane. It gives up very little on the bottom end.
I would use the 8004 before the 8016. I have seen mag articles where it makes good power.
I use the 7547-1 and it clears all day and is a very low rise single plane. It gives up very little on the bottom end.
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,663
Likes: 3
From: Palm Harbor FL
Originally Posted by After Shark
The 7525 is obsolete.
I would use the 8004 before the 8016. I have seen mag articles where it makes good power.
I use the 7547-1 and it clears all day and is a very low rise single plane. It gives up very little on the bottom end.
I would use the 8004 before the 8016. I have seen mag articles where it makes good power.
I use the 7547-1 and it clears all day and is a very low rise single plane. It gives up very little on the bottom end.
Any comments?
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Drifting
Joined: Mar 1999
Posts: 1,381
Likes: 15
From: Lusby MD
Weiand 7525
It's funny that the Weiand 7525 keeps coming up. It has quite a following, especially with us low hood corvette guys. It comes with medium to small ports but has the large single plenum. It makes for a good ram effect. I have one on my 327/350 and must say it's a nice unit. I don't know that it's stronger on the bottom end than stock (but not worse), but it pulls stong through the middle and high end. Best yet, it fits under my 68 hood and works with the stock Q-jet!
It's true that the 7525 is no longer available, but you see them on ebay every now and then.
That said... The Weaind Stealth is one of my favorite after market dual planes.
It's true that the 7525 is no longer available, but you see them on ebay every now and then.
That said... The Weaind Stealth is one of my favorite after market dual planes.
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,663
Likes: 3
From: Palm Harbor FL
OK. You guys seem to be steeering me towards the single plane that has good dual plane characteristics on the low end. That's fine but does anyone have knowledge or experience with the Stealth high rise dual plane that supposedly has good single plane characteristics on the high end? I'm willing to go with a single plane, but I'd just like to hear any comments on the Stealth. I like the advertised power range of the Stealth of idle to 6,800. The 7525 and the 7547 both have more narrow ranges of 2,000 to 6,500. Also, what do you give up from the 7525 Team G to go to the 7547 X-CELerator, The 7547 seems to be a lower rise.
Who was it that used to be a big Stealth fan on here? Was it Gkull? I remember someone posting here that they would take the Stealth over an Edelbrock RPM, but I can't remember who.
Thanks for the input.
Who was it that used to be a big Stealth fan on here? Was it Gkull? I remember someone posting here that they would take the Stealth over an Edelbrock RPM, but I can't remember who.
Thanks for the input.
Last edited by 79MakoL82; Apr 12, 2005 at 08:17 PM.
Burning Brakes
Joined: Nov 2000
Posts: 948
Likes: 0
From: Johnston Iowa
I runnning a Weiand Stealth intake on the 509 I have in my 69 convertible. I really like its performance. Tons of low end power and it will rev to 6800 and more with no problem even though I rarely push it that far. It also mates to and seals up nicely to the cold air chamber in my L88 hood.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
It is the only manifold I have used on the 3 engines combos in vette so nothing realy to compare it to but I did allow a strong pull to 6500 rpm's on top of 350 with hyd roller cam.
Race Director
Joined: Dec 1999
Posts: 11,096
Likes: 990
From: Sierra Foothills CA
I run a Stealth on the 355 in my Z28 w/ a Comp Cams XS282S solid flat tappet cam. Top end is strong- pulls 6800+ RPMs no problem. I use a 1/2 phenolic spacer & that added a bit in mid to high RPMs.
