Holley Strip Dominator VS Performer RPM - Chevelle Tech
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post #1 of 35 (permalink) Unread Sep 14th, 19, 5:31 PM Thread Starter
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Wes
 
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Question Holley Strip Dominator VS Performer RPM

1967 Nova, 385, 700R4, 2800 Converter, 3.55 Posi
385 - 9.8:1 compression, 8.33 DCR, AFR 195 Eliminator heads
1 3/4" fenderwell headers, 3.00" Dual Exhaust. No crossover
HR Cam .521/.530 230/238 @ .050" 109 LSA, 106 IC

The Strip Dominator had runner extensions welded in and a gasket match done by Mike Stark at CFM in Indy
The RPM is the older style, non-air gap, with the plenum divider milled similar to the air gap intakes

Car will primarily be street driven, with a few quarter mile passes a year. Contemplating installing a Holley Sniper I already have and a possible swap to a TKO with a 2.87 1st and a .64 OD. The engine is a fresh build, and hasn't been in the car yet. I'd like to keep the oil fill tube in the front of the intake.





Thanks in advance.

Wes

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post #2 of 35 (permalink) Unread Sep 14th, 19, 6:14 PM
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I would suggest the dual plane air gap.
With your intended use, gear and over drive transmissions I'm guessing you'll spend most of your time below 3500 rpm.
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post #3 of 35 (permalink) Unread Sep 14th, 19, 7:58 PM
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Re: Holley Strip Dominator VS Performer RPM

Go for the strip dominator and rev it. That runner extension was the hot thing in the 80s. We had one on my dads big block bracket car.
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post #4 of 35 (permalink) Unread Sep 14th, 19, 8:42 PM
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Re: Holley Strip Dominator VS Performer RPM

I can tell you the 330-25 is weak down low and on a street car that may be a factor. I would either use the Street Dominator 300-36 (same as the Z/28 intake) or the Air Gap. The Super Victor is good if you rework the plenum area.
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post #5 of 35 (permalink) Unread Sep 15th, 19, 12:14 AM
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Re: Holley Strip Dominator VS Performer RPM

Strip Dominator would be my vote. I like single planes though....
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post #6 of 35 (permalink) Unread Sep 15th, 19, 12:20 AM
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Re: Holley Strip Dominator VS Performer RPM

The dual plane will be much better with that short duration cam. Now if you get into the 240 to 250 range I can see the 300-25 working pretty good. My cam was at 254 and 264 on a 106 LCA and it screamed to 7200.
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post #7 of 35 (permalink) Unread Sep 15th, 19, 8:37 AM
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Re: Holley Strip Dominator VS Performer RPM

To me 3.55 is dual plane territory. Real drag gears are open plenum stuff. imho.

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post #8 of 35 (permalink) Unread Sep 15th, 19, 11:59 AM Thread Starter
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Re: Holley Strip Dominator VS Performer RPM

Looks like the dual plane is the way to go. Im also not sure that the strip dominator would fit under the stock hood.

Ill probably end up trying the Strip dominator, too, once I get the car sorted.

Thanks for the recommendations.
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post #9 of 35 (permalink) Unread Sep 16th, 19, 12:07 AM
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Re: Holley Strip Dominator VS Performer RPM

Nice wes....love single planes also they just rip. EFI on the single plane seems to work real well I cant see where it would be a slug thats going to make good torque. Let me know how that sniper works out
Havent seen a 300-36 in ages fwiw

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post #10 of 35 (permalink) Unread Sep 16th, 19, 12:54 AM Thread Starter
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Re: Holley Strip Dominator VS Performer RPM

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Nice wes....love single planes also they just rip. EFI on the single plane seems to work real well I cant see where it would be a slug thats going to make good torque. Let me know how that sniper works out
Havent seen a 300-36 in ages fwiw
Hey Ron,

I have an old style RPM and a 67-68 Z/28 intake. The RPMs plenum is notched like an air gap, tempted to notch the Z/28 intake and run it. BTW, Im back in TX now. After a year, I can start playing with my cars again.
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post #11 of 35 (permalink) Unread Sep 16th, 19, 3:41 AM
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Re: Holley Strip Dominator VS Performer RPM

Fitting a SBC in the Nova is tight EVERY WHERE. The Victor Jr looks good to fit the flat hood, but you seem to be in a lower RPM range.

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post #12 of 35 (permalink) Unread Sep 16th, 19, 10:48 AM
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Re: Holley Strip Dominator VS Performer RPM

Wes a 7530 Weiand has good hood clearance and wont be soggy. Put some work to mine real happy with it.

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post #13 of 35 (permalink) Unread Sep 16th, 19, 3:24 PM
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Re: Holley Strip Dominator VS Performer RPM

Single planes are very well suited to manual trans.
If keeping the auto, I'd go with dual plane.

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post #14 of 35 (permalink) Unread Sep 16th, 19, 3:33 PM
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Re: Holley Strip Dominator VS Performer RPM

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Wes a 7530 Weiand has good hood clearance and wont be soggy. Put some work to mine real happy with it.
No lack of low end tq even with a too big head/cam and tears it up as rpm increases
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post #15 of 35 (permalink) Unread Sep 16th, 19, 5:58 PM
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Re: Holley Strip Dominator VS Performer RPM

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Originally Posted by wes migletz View Post
Hey Ron,

I have an old style RPM and a 67-68 Z/28 intake. The RPMs plenum is notched like an air gap, tempted to notch the Z/28 intake and run it. BTW, Im back in TX now. After a year, I can start playing with my cars again.
The trick on the old Z/28 intakes used to be, cut the divider down 1" and add a 1" open spacer. Was supposed to be worth 15 to 20hp @6500rpm .
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