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Author
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Topic: switching from holley systemax2 to edelbrock rpm intake thoughts
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1SLOWLX
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Member # 558
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posted
 
 
I have the holley on there right now and I am sure I can gain some power with the edelbrock. I want to know what you guys think. It is going on a nitrous 347 with 10.1 comp and TEA 185 heads. last time on the dyno the graph went up nice and it made 363 rwhp and 360rwtq and pulled to 6700 and I let off. It has a 240 244 cam on a 110 lobe sep and 545 lift on both sides longtubes with a complete 3 inch exhaust. I just don't want to buy another intake and make less power and do all the work twice thanks
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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FasterDamnit
Bad Attitude
Member # 442
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posted
RPM or RPM II? The Holley is hard to beat on a stroker. Do your ports line up perfectly?
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'92 LX T5
Looked stock, went 11's 11.90 at 115mph.
'65 Mustang 347
www.fordmuscle.com
Livin' in the Carolina Pines
Posts: 2971 | From: NorCal | Registered: Sep 2001
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1SLOWLX
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Member # 558
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posted
they were pretty good I had my lower gasket matched to a 1262 and it lined it well. I am just seeing because if it can make a difference i might as well try something new ![[Big Grin]](biggrin.gif)
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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FasterDamnit
Bad Attitude
Member # 442
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posted
It's only money.
Posts: 2971 | From: NorCal | Registered: Sep 2001
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1SLOWLX
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Member # 558
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posted
not worried about the money factor worried about the time to switch and switch back that is bull
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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FasterDamnit
Bad Attitude
Member # 442
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posted
And which intake? You didn't answer.
Posts: 2971 | From: NorCal | Registered: Sep 2001
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1SLOWLX
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Member # 558
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posted
I have the holley now and thinking about buying the edelbrock performer rpm I just don't want to switch and switch back
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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66 AC COBRA
Nitrous King
Member # 904
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posted
i dont think either is going to be worth your time and money
there is something else holding you back, its not the intake
if everything is mechanically ok, i am going to put my money on the cam, why have ported 185's and a cam that i would put into a stpck shortblock 302 with off the shelf edelbrocks
yeah its a custom, but i dont guess i just dont like how it was specced, not enough lift for the head flow among other things
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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AJBlackGT
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Member # 3936
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posted
I think the rpm 1 might be a little small for that combo. I would look into the rpm 2, but if you are revving it past 6700rpm, I would even look at the victor , if you dont mind losing a little low end.
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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PunkINa5.SLOW
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Member # 10
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posted
Are you pretty happy with the single pattern with regards to lift on your camshaft?
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OUTTA THA DRAMA
R.I.P. MIKE STARKEY MY BABY BROTHER
12/8/77-5/17/03
Posts: 2495 | From: MTZ | Registered: Sep 2000
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1SLOWLX
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Member # 558
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posted
I think it can make more power with another cam but I didn't pick the cam out the people who did the heads picked me a cam oh well. Thinking about changing that also
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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PunkINa5.SLOW
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Member # 10
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posted
I would try some 1.7s on the intake
assuming you now have 1.6s on intake and exhaust
[ October 09, 2004, 06:42 PM: Message edited by: PunkINa5.SLOW ]
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OUTTA THA DRAMA
R.I.P. MIKE STARKEY MY BABY BROTHER
12/8/77-5/17/03
Posts: 2495 | From: MTZ | Registered: Sep 2000
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FasterDamnit
Bad Attitude
Member # 442
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posted
quote:
Originally posted by 1SLOWLX:
I have the holley now and thinking about buying the edelbrock performer rpm I just don't want to switch and switch back
OK-
WAKE UP!!!!!!!!!!!!!!!!!!!!!!!!
RPM Intake OR RPM II Intake!!!!
Which one are you considering buying or already have?
Posts: 2971 | From: NorCal | Registered: Sep 2001
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1SLOWLX
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Member # 558
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posted
just the NORMAL RPM because I think the RPM II looks like the holley
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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66 AC COBRA
Nitrous King
Member # 904
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posted
quote:
Originally posted by 1SLOWLX:
just the NORMAL RPM because I think the RPM II looks like the holley
there is a reason the rpmII, the upgraded version looks like the holley, because I and obviously edelbrock think its a better design
the holley intake is flawed mostly because the ports dont line up, but if yours does then its not the intake
I would be looking into a cam change and have it degreed in, and then go for it
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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FasterDamnit
Bad Attitude
Member # 442
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posted
quote:
Originally posted by 1SLOWLX:
just the NORMAL RPM because I think the RPM II looks like the holley
If that is your criteria for deciding which intake to get, quit while you are ahead. Drive and enjoy it.
Posts: 2971 | From: NorCal | Registered: Sep 2001
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1SLOWLX
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Member # 558
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posted
no it isn't but I have heard very good things about the regular rpm and the rpm 2 reminds of a holley and it looks like the runners would be a lot longer than the regular rpm.
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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FasterDamnit
Bad Attitude
Member # 442
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posted
quote:
Originally posted by 1SLOWLX:
no it isn't but I have heard very good things about the regular rpm and the rpm 2 reminds of a holley and it looks like the runners would be a lot longer than the regular rpm.
Why not actually find out the runner length instead of guessing by how it looks? Start w/ www.edelbrock.com .
Posts: 2971 | From: NorCal | Registered: Sep 2001
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1SLOWLX
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Member # 558
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posted
also the cost for the rpm2 compared to the rpm. RPM is a little cheaper
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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forced331
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Member # 1270
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posted
Stay with the Holley! ![[patriot]](graemlins/patriot.gif)
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1992 Ford Mustang LX (Original Owner)"Titanium Frost" 331stroker S-Trim, 5spd
2014 Ford Mustang GT- daily driver
Posts: 1154 | From: Sonoma County | Registered: May 2002
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
Get Ahold of 93pony and tell what you have and what you want to do, cause I also think your Cam might be a bit of a restriction. Also what size MAF are you running and what size TB? I don't think you will see any gains from a regular RPM and I don't think you will see big if any from a RPM2 I would keep that intake on there. I know of a guy that had a regular stock box RPM, stock box 185's and a xe274 cam, all in a 342. He made I believe 365 rwhp, don't remember the torq. There should be a little more left in your set-up, with your slightly ported heads and the different intake. I would for sure research on changing the cam.
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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1SLOWLX
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Member # 558
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posted
slightly ported heads ![[Eek!]](eek.gif)
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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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93LX342
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Member # 1793
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posted
i had a 342 10.5-1 afr 185 out of box,rpm unported(ports didnt line up}and a hitech motorsports cam and made 371rwhp and 380 ft lbs.ran 11.7 at 119 on dry rotted sportman pros.
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06 f250 superduty with some mods.
95 f250
www.unlimitedracing.com
Posts: 1036 | From: san jose | Registered: Sep 2002
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THE PUNISHER
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Member # 4333
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posted
Do what im doing, get the rpm intake and hook a wet plate in between the upper and lower intake. You WILL love it.
Posts: 382 | From: San Jose | Registered: Mar 2004
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