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FE Power Forums => FE Technical Forum => Topic started by: KMcCullah on January 11, 2013, 08:54:14 PM

Title: Cut down plenum divider
Post by: KMcCullah on January 11, 2013, 08:54:14 PM

I was kicking thru the graphs in the dyno section and found one where Jay built a 492 with a modified Blue Thunder dual plane intake with a removable divider. The HP gain was notable.
Question for Jay: Can you post the associated graph showing the torque curves?
Question for everybody: Has this mod ever been tried with a Performer RPM with a smaller FE on a dyno?

Title: Re: Cut down plenum divider
Post by: jayb on January 12, 2013, 03:44:17 PM

Sorry for the delay, it took me a while to dig out this data (from 2005):

(http://fepower.net/Photos/Posts/492plentq.jpg)

Title: Re: Cut down plenum divider
Post by: KMcCullah on January 12, 2013, 04:51:19 PM

Thank you Jay! Wow, I was expecting to see a compromise in torque but in this case, the opposite. I hope you do some similar dyno tests when you get your intake and adaptor package running.

Title: Re: Cut down plenum divider
Post by: hotrodfeguy on January 14, 2013, 09:07:37 PM

That was some interesting data, Thanks Jay. I also was wondering about tricks to the RPM. And how far the RPM could be tricked out to.

Title: Re: Cut down plenum divider
Post by: jayb on January 14, 2013, 09:17:08 PM

On my supercharged engine that made 1030 HP, the RPM manifold ports were enlarged to match the CNC ported heads, but no further work was done to it.  The RPM is a really, really good manifold just as it is...

Title: Re: Cut down plenum divider
Post by: fe66comet on January 15, 2013, 11:26:05 AM

Hopefully my air gap duel quad RPM will give me similar results. Not sure how much to loose if any or just use a spacer.