Edelbrok Head Really That Bad? - Team Camaro Tech
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post #1 of 3 (permalink) Old Jan 27th, 19, 09:17 AM Thread Starter
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Edelbrok Head Really That Bad?

Are the Edelbrok RPM heads, 6089 (170) runners on a 388 really that bad? I have been talking with Chris Straub about running one of his cams with my Edel RPM heads on my 388. I know AFR's are better but how much better?

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67 Camaro with 388 with Edleborck RPM heads, Air Gap, CC 282S, Tremec TKO
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post #2 of 3 (permalink) Old Jan 27th, 19, 09:31 AM
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Re: Edelbrok Head Really That Bad?

How much better? Just compare the flow bench numbers. Generally what ever the max air flow is in cfm you double to guestimate your gross horsepower. This assumes your cam and valve train can lift your valves that high. If not look to what your cam's valve lift actually is in your engine to get your actual flow potential. At which point the lower cost Edelbrock heads start to look much more attractive.

If you want to invest in HIGH RPM heads of any brand be prepared to run a solid roller, with matching springs, free flowing induction (I like a tunnel ram with two 660's) and an equally well flowing exhaust to move the quantity of air required to make the power you need to win a race. You will also need an ignition system to support that high RPM as even aftermarket HEI distributors can not fire the plugs reliably.

It is all about the combination of parts. It has taken me a half century to be able to put the right combo of parts together. Chris can tell you the same thing as he has been building engines as long as I have.

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post #3 of 3 (permalink) Old Jan 27th, 19, 10:08 AM
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Re: Edelbrok Head Really That Bad?

In wouldn't say they are bad heads... but the 170cc runner is small for a 388 cu.in. engine. Unless you only want low end torque, such as in a towing application, you may be better suited to go with something in the 195cc range for an average street engine.
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