Stealth CJ or Standard Stealth?

I have a Weiand Stealth CJ intake that I bought with intentions of building a 521 to put it on. Well, plans have changed and I am currently working on a 1972 429 with ported C9's on it. Going to put a Comp 34-239-4 cam in it with a 750 Edelbrock carb and L&L fenderwell exit headers. This is going in a 1978 F150 4x4 with a NP435 4speed, 4.88 gears and 36" tires. Will the CJ Stealth work ok with this or would I be better off with a standard Stealth or Performer RPM? Thank you for any recommendations.

Steve

Performer rpm maybe a Torquer

RPM IMO

Anybody know how much performance difference there is between a standard RPM and a standard Stealth manifold? There is a $50 difference in them and wondering if there is a $50 performance difference, too.
Steve

rmcomprandy wrote:

velcro7279 wrote:Anybody know how much performance difference there is between a standard RPM and a standard Stealth manifold? There is a $50 difference in them and wondering if there is a $50 performance difference, too.
Steve

If your major worry is performance versus money spent then you should find a cast iron 4 barrel manifold somewhere.

There is a cast iron 4 bbl on the engine right now. I was going to use it but figured a Stealth or RPM would be better with the ported heads and the cam. Would I be giving up much using the iron over a Stealth or RPM?

Steve

Well, money is part of it. I mean why spend money on a manifold when it could be put somewhere else. I originally asked if the Cobra Jet Stealth I have would work or if a standard Stealth or Performer RPM would work better? Are the ports too big on the CJ Stealth to maintain any kind of port velocity in a usable street rpm range or would it be fine with the rest of my engine? If the CJ manifold I have won't work well then I will sell it and get something that will or trade it for something that will.

Steve

The CJ stealth is to big and will hurt low end, the perfromer RPM is a great choice like has already been said.

remember usuable power = $$$$$. no matter how you look at it it is going to cost you to do it right.

not trying to be a smart ass but why would you put a stock iron manifold on a set of ported heads? sort of defeats the purpose to me.

paulie wrote:remember usuable power = $$$$$. no matter how you look at it it is going to cost you to do it right.

not trying to be a smart ass but why would you put a stock iron manifold on a set of ported heads? sort of defeats the purpose to me.

Factory Stuff will out do or equal alot of aftermarket manifolds Idle to 3500-4000 RPM.

Thanks for all the input. Think I will look around for a Performer RPM or 8012 Stealth and sell my 8021 Stealth. If anybody needs an 8021 Stealth I have one for sale now. Whenever I get this going I will let you know how it runs. Probably won't be for about three months though. After the weather breaks and gets a little warmer. Thanks again. Especially to dfree383 and Randy.

Steve

dfree383 wrote:

paulie wrote:remember usuable power = $$$$$. no matter how you look at it it is going to cost you to do it right.

not trying to be a smart ass but why would you put a stock iron manifold on a set of ported heads? sort of defeats the purpose to me.

Factory Stuff will out do or equal alot of aftermarket manifolds Idle to 3500-4000 RPM.

I didn't realize that a factory intake performed that well. I know in the past with the mopar and chevy stuff I have done, the factory intake was a weak link.

rmcomprandy wrote:

paulie wrote:remember usuable power = $$$$$. no matter how you look at it it is going to cost you to do it right.

not trying to be a smart ass but why would you put a stock iron manifold on a set of ported heads? sort of defeats the purpose to me.

BECAUSE ... the question is about dollars spent per performance gained NOT the most horsepower which can be achieved.

It totally depends upon how much someone is willing to spend for 10 ft/lbs of torque or horsepower at an RPM range he will rarely use; no one else can make THAT decision for him.

again I wasn't trying to stir the pot, but really trying to learn something here. I am sorry if it came across that way but I am all about saving a buck where I can. I see in a abobe post that the factory iron stuff works better than I expected, and I am very interested in this.


after re reading I do see I could have worded myself better and again not trying to come across as a ass but more just being curious.