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Performmer RPM Mdification #1606459 04/12/14 09:22 PM 04/12/14 09:22 PM
Joined: Sep 2006 Posts: 3,011 Sac, CA M mopowers OP master
mopowers OP master M Joined: Sep 2006 Posts: 3,011 Sac, CA	What types of modifications do you guys do to your Performer RPM intakes?? Does cutting down the divider do any good? Will knife-edging the divider increase flow at all with a 1" spacer? Just curious what you guys have done.

Re: Performmer RPM Mdification [Re: mopowers] #1606460 04/12/14 09:44 PM 04/12/14 09:44 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Yes people have cut down dividers that did make noticeable differences so I'm sure it would on the RPM. Actually you dont want to knife edge any edges below the carb base as once the air/fuel are mixed as any sharp edges can split air/fuel molecules away from each other & they need to be bonded in pairs to each other for them to ignite. Even if sharp edges only cause 1% of the mixture to not ignite that's 1% horsepower you lose. Knife edging (appropriately) up in the carb itself for more airflow is as you know beneficial (thinning throttle blades/reducing shaft diameter etc). No actual exp on how lowering the divider in an RPM would make it act. You want all edges (including the divider) smoothed/tapered appropriately as needed live every 24 hour block of time like it's your last day on earth

Re: Performmer RPM Mdification [Re: mopowers] #1606461 04/12/14 11:42 PM 04/12/14 11:42 PM
Joined: Feb 2004 Posts: 7,196 Harrisburg, Pa. screamindriver master
screamindriver master Joined: Feb 2004 Posts: 7,196 Harrisburg, Pa.	Why modify that intake with the great numbers the RPM delivers out of the box ??? I've modded old performance /stock intakes over the years but never saw the need to cut into the RPM..

Re: Performmer RPM Mdification [Re: screamindriver] #1606462 04/12/14 11:50 PM 04/12/14 11:50 PM
Joined: Dec 2004 Posts: 10,563 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,563 Rittman Ohio	I would leave it alone I just cleaned up a small amount casting flaws and bolted it on and ran 10.91 with a dual plane intake and that's not bad. Gus 8110539-frontveiwsavoy.jpg (69 downloads) 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: Performmer RPM Mdification [Re: RapidRobert] #1606463 04/13/14 03:52 AM 04/13/14 03:52 AM
Joined: Sep 2004 Posts: 6,906 IL, Aurora A ademon master
ademon master A Joined: Sep 2004 Posts: 6,906 IL, Aurora	Quote: Yes people have cut down dividers that did make noticeable differences so I'm sure it would on the RPM. Actually you dont want to knife edge any edges below the carb base as once the air/fuel are mixed as any sharp edges can split air/fuel molecules away from each other & they need to be bonded in pairs to each other for them to ignite. Even if sharp edges only cause 1% of the mixture to not ignite that's 1% horsepower you lose. Knife edging (appropriately) up in the carb itself for more airflow is as you know beneficial (thinning throttle blades/reducing shaft diameter etc). No actual exp on how lowering the divider in an RPM would make it act. You want all edges (including the divider) smoothed/tapered appropriately as needed what if it splits both in half ??now you would have a more atomized mixture

Re: Performmer RPM Mdification [Re: ademon] #1606464 04/13/14 06:07 AM 04/13/14 06:07 AM
Joined: Feb 2010 Posts: 18,493 Granite Bay CA Kern Dog Striving for excellence
Kern Dog Striving for excellence Joined: Feb 2010 Posts: 18,493 Granite Bay CA	I thought that by milling the divider, you lose torque. Maybe if the mods were paired with a 1" spacer, whatever loss in torque may be offset by a gain in HP at the high end.

Re: Performmer RPM Mdification [Re: ademon] #1606465 04/13/14 11:39 AM 04/13/14 11:39 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: what if it splits both in half? now you would have a more atomized mixture The manifold sharp metal edges are only capable of seperating the molecules away from each other. Last edited by RapidRobert; 04/13/14 02:09 PM. live every 24 hour block of time like it's your last day on earth

Re: Performmer RPM Mdification [Re: RapidRobert] #1606466 04/13/14 11:42 AM 04/13/14 11:42 AM
Joined: Jan 2003 Posts: 75,134 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,134 A Banana Republic near you.	Quote: Actually you dont want to knife edge any edges below the carb base as once the air/fuel are mixed as any sharp edges can split air/fuel molecules away from each other & they need to be bonded in pairs to each other for them to ignite. Did you really just type that ???

Re: Performmer RPM Mdification [Re: JohnRR] #1606467 04/13/14 11:53 AM 04/13/14 11:53 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: Did you really just type that ??? yes I did. I believe every little bit (of blueprinting) adds up & keeps us ahead of the chebrolet boys Last edited by RapidRobert; 04/13/14 02:10 PM. live every 24 hour block of time like it's your last day on earth

Re: Performmer RPM Mdification [Re: RapidRobert] #1606468 04/14/14 11:59 AM 04/14/14 11:59 AM
Joined: Sep 2006 Posts: 3,011 Sac, CA M mopowers OP master
mopowers OP master M Joined: Sep 2006 Posts: 3,011 Sac, CA	Thanks for the input guys.

Re: Performmer RPM Mdification [Re: RapidRobert] #1606469 04/14/14 12:37 PM 04/14/14 12:37 PM
Joined: Jun 2004 Posts: 3,399 St. Charles, MO wingman Uncreative Title
wingman Uncreative Title Joined: Jun 2004 Posts: 3,399 St. Charles, MO	Quote: Quote: Did you really just type that ??? yes I did. I believe every little bit (of blueprinting) adds up & keeps us ahead of the chebrolet boys I'm not a professional chemist, but I think some of your science is a little flawed... An atomized mixture simply means that tiny droplets of a liquid (fuel) are dispersed in a gas(air). They do not chemically bond, as this would create an entirely different molecule. Also, for your "pairs" concept to be correct, air and fuel molecules would have to be in a 1:1 ratio. They are not. And if a sharp edge on an intake manifold were capable of spltting atoms apart, let's just say atomic bombs would be a lot easier to make. The main thing you want in a "wet" intake manifold is for the air/fuel to move quickly and smoothly through, so the tiny droplets stay evenly distributed and do not fall out of suspension. 1969 Dodge Coronet Super Bee 383 A4 1970 Plymouth Road Runner 440 FC7 (sold)

Re: Performmer RPM Mdification [Re: wingman] #1606470 04/14/14 12:49 PM 04/14/14 12:49 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: I'm not a professional chemist, but I think some of your science is a little flawed... And if a sharp edge on an intake manifold were capable of spltting atoms apart, let's just say atomic bombs would be a lot easier to make. (1) well I did play hookey from several of my high school chemistry classes (2) not splitting atoms but seperating (not splitting) A/F molecules away from each other. Smoothed passages (rougher finish on intake path)/no sharp edges/manipulating velocity with porting live every 24 hour block of time like it's your last day on earth

Re: Performmer RPM Mdification [Re: RapidRobert] #1606471 04/14/14 06:51 PM 04/14/14 06:51 PM
Joined: Jan 2003 Posts: 75,134 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,134 A Banana Republic near you.	Quote: Quote: I'm not a professional chemist, but I think some of your science is a little flawed... And if a sharp edge on an intake manifold were capable of spltting atoms apart, let's just say atomic bombs would be a lot easier to make. (1) well I did play hookey from several of my high school chemistry classes (2) not splitting atoms but seperating (not splitting) A/F molecules away from each other. Smoothed passages (rougher finish on intake path)/no sharp edges/manipulating velocity with porting How sharp an edge are we talking here that can split something that usually can only be seen using a $500k piece of equipment ???

Re: Performmer RPM Mdification [Re: RapidRobert] #1606472 04/14/14 08:16 PM 04/14/14 08:16 PM
Joined: Mar 2006 Posts: 9,897 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,897 MI, usa	Air/fuel will flow better over a radiused edge. Ever seen a sharp edge in a ported head? Milling the divider increases plenum volume. This will normally decrease low speed torque. If your combo spends a significant amount of time above 5500 it may help. The out of the box RPM will produce more torque at 5500 and below than just about any available intake. Even in a motor shifted at 6000 or slightly above the low end loss may not be offset by the higher rpm gain. Doug

Re: Performmer RPM Mdification [Re: mopowers] #1606473 04/14/14 09:39 PM 04/14/14 09:39 PM
Joined: Mar 2005 Posts: 792 Earth R Rob C super stock
Rob C super stock R Joined: Mar 2005 Posts: 792 Earth	The only mod worth anything really is to port match and run the porting as deep as possible. Messing with the plenum area could yells good results. But if you find a positive result with a milled center divider, a single plane intake is more than likely what you really need.

Re: Performmer RPM Mdification [Re: mopowers] #1606474 04/14/14 10:34 PM 04/14/14 10:34 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Yeah, DON'T DO IT!!! Leave the intake plenum alone.

Re: Performmer RPM Mdification [Re: Rob C] #1606475 04/14/14 10:34 PM 04/14/14 10:34 PM
Joined: Aug 2005 Posts: 4,799 ILL M MLR426 master
MLR426 master M Joined: Aug 2005 Posts: 4,799 ILL	Splitting molocules the divider should split the fuel and air charge coming in but it does know a red molocule from a blue molocule, did I just write that LOL. I'm done with this post now. MLR426 Last edited by MLR426; 04/14/14 10:42 PM.

Re: Performmer RPM Mdification [Re: MLR426] #1606476 04/14/14 10:40 PM 04/14/14 10:40 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Quote: Splitting molocules the divider should split the fuel and air charge coming in but it does know a red molocule from a blue molocule, did I just write that LOL. I'm done this post now. MLR426 It's the new version of the old edelbrock. Einstein Performer RPM... The power of e=mc2 LOL

Re: Performmer RPM Mdification [Re: MLR426] #1606477 04/14/14 10:40 PM 04/14/14 10:40 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: I'm done now. I learned my lesson live every 24 hour block of time like it's your last day on earth

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