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Original Message
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| RE: Edelbrock SP2P & FEL-PRO gaskets |
| By Gerry Proctor - 02/14/2003 8:02:07 PM; IP 207.44.128.199 |
It's not a whole lot different than a stock manifold, Gary which is why it is such a poor value. Many users found no difference or performance was worse. The 2bbl iron manifold is also a dual-plane. In fact, all Ford FE manifolds except for the 8-V tunnel wedge and a single plane version of the medium riser 8-v.
The concept behind the SP2P was to lengthen the runners and bring up velocity. Theoretically, you can and do tune an engine for max VE by varying the runner length and volume but you can't do it without considering the rest of the components. In other words, the intake manifold has to match the cam, exhaust, compression, gearing... So in that regard, while the manifold could show improvements on a flow bench that doesn't always translate into real-world operating conditions which was the nature of the SP2P. Chrysler did a fairly good job with this long-runner idea with their Sono-Ram set up. This perched a Carter AFB four-barrel carb on a long-runner intake where it started outside the valve cover with a small plenum and the runner tubes ran to the head's intake ports on the opposite bank. So you had dual-quads on this intake setup that literally ran from fenderwell to fenderwell. A lot of folks thought this was a high performance set up but it was designed to maximize torque at low rpm. But they didn't just slap it on any engine coming down the line. It was a completely balanced installation.
As you look at the evolution of the SP2P, you get to the Performer manifolds which have a more traditional layout that is less sensitive to how an individual may use the intake. And it works fairly well on a very stock engine as one that has a bit more horsepressure from modifications. It does run out of breath at around 5,000 rpm but it does a very good job from the off-idle to the capabilities of what most stock cams can run to.
It could be worse, though. The smallblock Chevy SP2P is held in even less regard than the FE version. The FE version looks fairly good when compared to that toad. |
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