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Original Message
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| RE: "designed for AFBs in mind". . ? |
| By John - 07/26/2002 9:57:50 PM; IP 142.177.110.148 |
I use one on my 428. Here's the scoop:
1/ It works just fine though I dare say strip times might say otherwise. In my 2500 lb Cobra, I can't put the throttle more than 1/3 of the way down as the front wheels start to lift up and I get very, very frightened...chuckle.
2/ Offenhauser still offers the correct spacers. They are only about 3/8ths to 1/2 an inch thick and are offset to allow clearance for the distributor. They look awful, but the whole package looks impressive.
3/ The manifold ports are to high and too narrow. I think they might be for the 390GT heads, but am not sure. There is a large amount of cylinder head at the top and bottom of the ports that is in the way for smooth air/fuel delivery from the manifold to the heads. It goes against everything one's heard about port matching, but it still works incredibly well.
4/ You will have to get the correct linkage for the twin carbs. Be carefull with aftermarket linkage as the return spring starts to pull against the linkage shaft as the throttle is depressed causing less and less return force on the gas pedal the deeper you go into the throttle.
5/ If you use regular Holley's, you will have to decrease the size of the idle jets or even after bottoming out the idle screws, the whole thing will idle rich. Also, you will need the vacumn covers with the nipples for the balance vacumn hose. You can make these by drilling and tapping the top of the c\vacumn chamber covers for a 90 deg grease fitting with the "guts" removed.
6/ Remember....HP is the work done...if you can't get the traction, or if the car is light and quick, you'll never blame this manifold for losing races.
7/ I used to get oil seeping up around the distributor hole even with a new O-ring on the distributor. I think this is another Mallory problem vs the manifold, but it's a nuisance. To cure it, I cut a piece of thick gasket paper to completely go around the o-ring groove and then put the o-ring on top of it. Problem solved.
8/ I'd buy another one. In fact, if you buy this one you are talking about, and it turns out you don't like it, let me know and if the price is right, I'll take it off your hands as a spare. |
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This thread, so far...
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