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Original Message
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| RE: 428 cj Exhaust Manifolds |
| By Mike McQuesten - 10/25/2001 1:16:02 PM; IP 206.193.0.122 |
My opinion is that the factory 428 Cobra Jet exhaust manifolds work very well especially for stock.
My personal experience is this, on a very mild 428 CJ with only a "hotter" cam (I still question my decision to run three different cams, Herbert, Rhoads, Schneider..)the rest stock, oh I did run a '67 aluminum PI intake, but the rest was stone stock from distributor to 735 Holley, the two cars I ran this engine in ran mid to high 13's consistently. First was a '66 Cyclone that weighed 3680. It ran 13.55 @ 104. Then I installed the exact same engine into a '61 Starliner that weighed 3,860. I did switch to the shorty HP 352/90/06/PI manifolds. That car ran a best of 13.72 @ 103. I did run dump out exhaust cut outs on both cars. As a matter of fact, the same ones.
So my opinion again is, yes the CJ exhaust manifolds work very well especially if you allow a quick opening down the line, dump out exhaust.
I read sometime back about a Mustang 428CJ that ran low 12's through the stock exhaust manifolds. It was quite awhile back but it was a very prepared "stock" 'stang.
Headers should always give you more power. But generally it's at a price, i.e., maintenance, fit, exhaust leaks & noise. |
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