Edelbrock Performer RPM - welded

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Edelbrock Performer RPM - welded

Post  JBR-3 on January 2nd 2017, 11:41 pm

These intakes have the plenum divider notched, age-old trick for a 2-plane to work
at a bit higher RPM.

If you welded this notch up making the intake a true 2-plane, you would gain a bit of torque down low but give up a bit up higher.
It's still a pretty good 2-plane intake.

Could anyone hazard a guess how much this might lower the torque peak, no other engine changes ?
Of course, optimizing the engine package for a lower RPM band would be best, but just with this change alone,
what might be the effect ? OK, I'll allow jet changes but that's it.

300 RPM on a "nice" 466 ?

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Re: Edelbrock Performer RPM - welded

Post  dfree383 on January 3rd 2017, 9:44 am

It won't lower the peak, it only allow the intake to think the carb is bigger
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Re: Edelbrock Performer RPM - welded

Post  rmcomprandy on January 3rd 2017, 10:55 am

Welding the notch closed will lower the RPM point of peak torque and usually increase that number; unless the carb is to small.

You will lose peak RPM and "hang-on" power; about 1/2" of what you will gain in the very low RPM range under the peak torque.

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Re: Edelbrock Performer RPM - welded

Post  Scott Foxwell on January 3rd 2017, 11:36 am

It's also going to want more carb.

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