Towing engine build
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Elder User
Joined: Aug 2009
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Thanks for all the insight, is there any real benefit with the performer intake over a port matched stocker? Also, any gains in the higher end hypereutectic versus a cheaper alternative? I'm not trying to cheap out, but it's not exactly what I call a high performance build where all the bells and whistles are required.
FTE Legend
Joined: Jul 2010
Posts: 32,875
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From: Northeast, OK
There is a significant weight difference between the stock cast iron and aluminum. But, as was said, some aftermarket manifolds are designed more for higher RPM than low-end torque. For instance, Edelbrock makes the Performer that is tuned from idle up, while their Performer RPM is a bit higher in the range. So, if torque is the goal then shop for ones tuned for that.
However, there is a minor disadvantage to aftermarket. Most relocate the carb from stock enough that the throttle bracket/linkage combo doesn't work well. Typically the carb comes back enough that there's slack in the linkage. Edelbrock sells a kit that supposedly fixes that, but in my experience it is a joke. I prefer to mod the factory bracket by sawing it apart, installing a spacer, and welding it back up. But something needs to be done in my opinion.
However, there is a minor disadvantage to aftermarket. Most relocate the carb from stock enough that the throttle bracket/linkage combo doesn't work well. Typically the carb comes back enough that there's slack in the linkage. Edelbrock sells a kit that supposedly fixes that, but in my experience it is a joke. I prefer to mod the factory bracket by sawing it apart, installing a spacer, and welding it back up. But something needs to be done in my opinion.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
I have a 460 performer.
Any loss off idle is minimal.
With water and an exhaust crossover in the manifold it warms up much faster than cast iron and probably weighs #50 less.
You shouldn't use a turkey pan gasket with an aluminum intake.
Any loss off idle is minimal.
With water and an exhaust crossover in the manifold it warms up much faster than cast iron and probably weighs #50 less.
You shouldn't use a turkey pan gasket with an aluminum intake.
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