Would a Performer RPM be a gain? *DELETED*
#676947
04/22/10 02:39 AM
04/22/10 02:39 AM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
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Glendale, AZ
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Post deleted by AZ69Charger
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Post deleted by Defbob
[Re: 69L78Nova]
#676948
04/22/10 02:42 AM
04/22/10 02:42 AM
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Anonymous
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Anonymous
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Re: Would a Performer RPM be a gain?
[Re: Kern Dog]
#676950
04/22/10 03:03 AM
04/22/10 03:03 AM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
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Banned. Forever.
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Oh yeah, Ive definately seen the difference in port size. Ive actually heard stories about the factory cast iron TQ manifolds outperforming the Performer. I just want to make sure it wont kill low end torque. And hopefully, it will fit under the hood with the stock dual snorkel air cleaner. Ma put 440s in these beasts, so I would think it would fit
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: Would a Performer RPM be a gain?
[Re: 69L78Nova]
#676952
04/22/10 07:10 AM
04/22/10 07:10 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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Quote:
I just picked up a perfect Performer RPM manifold for $40. I was thinking about throwing it on my 360 in my 78 Fury. Its a stock E58, with the exception of an Edelbrock 1406 carb, XE256 cam, Hooker comp headers, and dual 2 1/2" exhaust. Im running a stock converter (for now) and 3.21 gears. The RPM is "advertised" as being effective from 1500-6500rpm. Im unfortunately running a regular Performer on it at the moment. Would the RPM be any kind of a gain over what I have? It may be a dumb question, but most of my experience comes from real performance builds, with much higher power levels, in much lighter cars. I figured for $40...it may be worth a shot. I just dont want to lost any low end torque...gotta get this barge moving! 
http://compcams.com/Community/Articles/Details.asp?ID=-738676943
look at this, stock blueprinted 340 that Dulcich did a series of bolt-ons. step 3 is a stock 340 with an 800cfm eddie and headers (that has a cam similar in duration to the XE256). step 4 swaps the stock intake for an eddie RPM air gap (runners are basically the same between the RPM and Air Gap)...25HP increase at 5100 RPM and 25lb-ft at a similar RPM, and even 12-13 lb-ft at 3300...
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Would a Performer RPM be a gain?
[Re: Kern Dog]
#676953
04/22/10 07:11 AM
04/22/10 07:11 AM
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Joined: Jul 2008
Posts: 37
MI
Jerseyboy
member
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member
Joined: Jul 2008
Posts: 37
MI
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Quote:
The standard iron 440 intake is a real low profile unit, so it may not be fair to compare the height there. I have a 440 with a Performer RPM in my Charger. It clears with a dropped base MP air cleaner. 
Drop Base MP aircleaner? They make such a beast? You mean the cast aluminum unit with Mopar Performance cast into it? If there is a drop base available, I'd like to know about it!
J
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Re: Would a Performer RPM be a gain?
[Re: Mr.Yuck]
#676955
04/22/10 08:34 AM
04/22/10 08:34 AM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
wait is it a "Performer" or a RPM? the RPM is the air-gap type. If you got one of those for $40 you stole it.
the RPM is not nessesarily the Air gap type. It comes either way. But yes it will be a big improvement over the stock or regular Performer intake. 
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Re: Would a Performer RPM be a gain?
[Re: 69L78Nova]
#676956
04/22/10 09:49 AM
04/22/10 09:49 AM
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Joined: Jan 2003
Posts: 1,263
Southwestern Ontario Canada
racealittle
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,263
Southwestern Ontario Canada
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I think there is more velocity and bottom end torque with the performer for your present combination.
The rpm intake will not help the bottom end but still be OK. It may get you some more rpm up top (3-500 more). Good heads would allow the rpm intake to show its full potential. Perhaps 1,000 rpm more with better bottom end to boot.
I really don't think it will show up on the time slip with the way your present combination.
Afterall, torque is what will "get the barge moving".
Too many cars, too many parts, too little coin, too little space to work in, too little time left to make it all happen!
Update: down to one ride, still too many parts, a little more jingle in the pocket, gaining space, and it's going to happen this year!
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Re: Would a Performer RPM be a gain?
[Re: racealittle]
#676957
04/22/10 10:03 AM
04/22/10 10:03 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
I think there is more velocity and bottom end torque with the performer for your present combination.
The rpm intake will not help the bottom end but still be OK. It may get you some more rpm up top (3-500 more). Good heads would allow the rpm intake to show its full potential. Perhaps 1,000 rpm more with better bottom end to boot.
I really don't think it will show up on the time slip with the way your present combination.
Afterall, torque is what will "get the barge moving".
well...
looking at another dulcich article here on a smogger 360, looking between step 3&4, the only difference is a stock spread bore intake vs. an edelbrock performer.
granted, the performer is up 10 lb-ft at 2000 RPM where the test starts, that advantage is gone by 2400 RPM, and is actually down 10lb-ft by 2800 RPM. and this is with a stock 360 cam.
looking at the Dulcich 340 and 360 articles I referenced, it looks like on a 360ish cube motor, even a mild one, you may loose a minimal amount of torque on the low end--2400RPM on down (likely right around the flash RPM of the converter), but gain significantly on midrange torque & HP from at least 3k on up....I see no downsides to running it, and worst case maybe upgrading to a stock high stall, or MP166k converter (which flashed to 2800 behind my 360 in a 3.55 equipped 5th ave) would mitigate the 10 lb-ft loss below 2400 RPM
Last edited by patrick; 04/22/10 10:06 AM.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Would a Performer RPM be a gain?
[Re: 69L78Nova]
#676959
04/22/10 12:13 PM
04/22/10 12:13 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
Yeah, I guess Ill try it out. My current converter only flashes to 1500. I was going to eventually swap it out for something in the 2000-2200 range. And in reply to a question asked earlier, it is not an air gap. It is a regular Performer RPM...in which case, I still stole it. Thanks everybody...Ill give it a shot
Yes you did steal it. Did you use a gun????
Yes it is a better manifold than the standard Performer or the cast OEM manifold. Very comparable to the Airgap or the LD340. I am very confident that you will like it.
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Re: Would a Performer RPM be a gain?
[Re: 69L78Nova]
#676960
04/22/10 12:14 PM
04/22/10 12:14 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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others have said after contacting engine builders and edelbrock tech support, they don't see a big enough difference between the regular RPM and the air gap to replace one with the other, so those air gap numbers on the 340 should be fairly representative of what you'd see with a regular RPM.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Would a Performer RPM be a gain?
[Re: 69L78Nova]
#676961
04/22/10 12:39 PM
04/22/10 12:39 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOrk !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
I just dont want to lost any low end torque...gotta get this barge moving!
You saying THIS .....keep whatcha' got !!
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Re: Would a Performer RPM be a gain?
[Re: patrick]
#676963
04/22/10 03:53 PM
04/22/10 03:53 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
Quote:
Quote:
I just dont want to lost any low end torque...gotta get this barge moving!
You saying THIS .....keep whatcha' got !!
I bet he won't lose enough to notice....
he'll gain in the midrange quite significantly.
next upgrade, get a stock high stall converter.
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