Vortec Intake /spreadbore Or? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

buckola · 05-19-2004, 02:43 PM

I DON'T WANT TO BEAT THE VORTEC QUESTIONS TO DEATH BUT...
I HAVE DECIDED TO GO WITH VORTEC HEADS, HIGH ENERGY 268 COMP CAM
AND AN EDELBROCK RPM VORTEC INTAKE. I WILL BE KEEPING THE QJET (FOR AWHILE ANYWAY) SO HAVE OPTED FOR THE SPLITBORE. IS THIS THE BEST INTAKE FOR THIS APPLICATION?
GOALS:
BOTTOM END TORQUE WITH THE 3:07 GEAR
DECENT PERFORMANCE WITH RELIABILITY.
GAS MILEAGE...WHO CARES

WILL I BE HAPPY WITH THIS COMBO

OOPS....SORRY ABOUT THE CAPS...I'M NOT YELLING

KutThroatKustoms · 05-19-2004, 04:38 PM

Dont know about best, but for bottom end, the RPM is 1500-6500 i believe, try maybe the Performer Air Gap, idle to 5500.. with a 3.07 you're not gonna see the 3500 or so i believe range the RPM peaks, very much. imo. but i'm not an expert.

adamls · 05-19-2004, 05:39 PM

Kut is right, for torque the Performer Air Gap is better, shorter runners, but if I am not mistaken they do not make a Performer in an air gap version for Vortec heads. You will have to use the RPM Performer Air Gap for Vortec heads (#7516 - $225) or you can use the standard Performer, withouth air gap, for Vortec heads (#2116 - $165). They are both very good intakes.

buckola · 05-19-2004, 05:52 PM

thanks,
For the extra $ do you think the air gap is worth it. I don't want to cheap out at this stage of the game

adamls · 05-19-2004, 06:28 PM

The RPM Air Gap is a very good intake but like mentioned is more tuned for 1500-6500 RPM. Not sure what your engines torque curve looks like. The performer will make good power for you, especially at the low end, over a stock intake. I admit it would be better if the intake did have an air gap. Call Edelbrock, they may be coming out with a Performer Air Gap for Vortecs soon and you may want to wait.

Stroker · 05-19-2004, 11:12 PM

First, are you building a 350 with auto tranny and stock converter? If this is true then the performer may be a better choice than the RPM intake. If you live and drive in a cold climate I would personally stay away from the AirGap,but if you live down south where its warm then the AirGap design is probably worth the extra cost. Your performance is going to suffer somewhat with the 3.07 gearing, stock converter and the trucks weight. What compression ratio and type of exhaust are you planning to use? Keeping the compression up around 9.5-10.1 will help out the bottom end as will smaller diameter and longer primary header tubes. If you get it all together and your not happy with the off the line performance then you can always make a converter or gearing swap in the future. Good luck........Stroker

jimfulco · 05-20-2004, 12:04 AM

They don't make a spread-bore RPM intake for Vortec heads. I emailed them about 3 months ago & they said they have no plans to do so. Maybe if a bunch of people asked, they might reconsider.

Mudder · 05-20-2004, 03:08 AM

I have a RPM Airgap for vortec heads I may be willing to part with. PM me if interested.

buckola · 05-20-2004, 05:57 PM

do you think the hedman headers part #69096 unequal length 1-5/8 with 3" collectors would do the trick? theres a set on ebay and the guy lives close by

Bowtie67 · 05-20-2004, 06:20 PM

Quote:

Originally Posted by buckola

do you think the hedman headers part #69096 unequal length 1-5/8 with 3" collectors would do the trick? theres a set on ebay and the guy lives close by

As far as I my o2 worth is that headers for the street are pretty much about equal, hedman, Dynomax, Hooker & Others all make descent headers, the only thing I would recomend is make sure they are coated, they look a lot nicer and last a lot longer than the steel that rustup in no time and also add more heat in the engine compartment.

05-19-2004, 02:43 PM	#1
buckola 1 Wrench / 10 Knuckles Join Date: Sep 2002 Location: Burlington Ontario Posts: 179	Vortec Intake /spreadbore Or? I DON'T WANT TO BEAT THE VORTEC QUESTIONS TO DEATH BUT... I HAVE DECIDED TO GO WITH VORTEC HEADS, HIGH ENERGY 268 COMP CAM AND AN EDELBROCK RPM VORTEC INTAKE. I WILL BE KEEPING THE QJET (FOR AWHILE ANYWAY) SO HAVE OPTED FOR THE SPLITBORE. IS THIS THE BEST INTAKE FOR THIS APPLICATION? GOALS: BOTTOM END TORQUE WITH THE 3:07 GEAR DECENT PERFORMANCE WITH RELIABILITY. GAS MILEAGE...WHO CARES WILL I BE HAPPY WITH THIS COMBO OOPS....SORRY ABOUT THE CAPS...I'M NOT YELLING __________________ 1970 GMC Custom Vortec Heads, Edelbrock Performer Intake, Crane 272 Energizer, Hedman Full Length HTC Headers 2006 Dodge Charger SRT8. 1/4 mile 13.3 1973 Z1 900 Kawasaki ( all original) Last edited by buckola; 05-19-2004 at 02:49 PM.

05-19-2004, 05:39 PM	#3
adamls Gotta Startem Early Join Date: Oct 2001 Location: Amarillo, TX, USA Posts: 364	Kut is right, for torque the Performer Air Gap is better, shorter runners, but if I am not mistaken they do not make a Performer in an air gap version for Vortec heads. You will have to use the RPM Performer Air Gap for Vortec heads (#7516 - $225) or you can use the standard Performer, withouth air gap, for Vortec heads (#2116 - $165). They are both very good intakes. __________________ 67 SWB In Progress, one piece at a time, maybe 3 years I will be finished

05-19-2004, 05:52 PM	#4
buckola 1 Wrench / 10 Knuckles Join Date: Sep 2002 Location: Burlington Ontario Posts: 179	thanks, For the extra $ do you think the air gap is worth it. I don't want to cheap out at this stage of the game __________________ 1970 GMC Custom Vortec Heads, Edelbrock Performer Intake, Crane 272 Energizer, Hedman Full Length HTC Headers 2006 Dodge Charger SRT8. 1/4 mile 13.3 1973 Z1 900 Kawasaki ( all original)

05-19-2004, 06:28 PM	#5
adamls Gotta Startem Early Join Date: Oct 2001 Location: Amarillo, TX, USA Posts: 364	The RPM Air Gap is a very good intake but like mentioned is more tuned for 1500-6500 RPM. Not sure what your engines torque curve looks like. The performer will make good power for you, especially at the low end, over a stock intake. I admit it would be better if the intake did have an air gap. Call Edelbrock, they may be coming out with a Performer Air Gap for Vortecs soon and you may want to wait. __________________ 67 SWB In Progress, one piece at a time, maybe 3 years I will be finished

05-20-2004, 05:57 PM	#9
buckola 1 Wrench / 10 Knuckles Join Date: Sep 2002 Location: Burlington Ontario Posts: 179	do you think the hedman headers part #69096 unequal length 1-5/8 with 3" collectors would do the trick? theres a set on ebay and the guy lives close by __________________ 1970 GMC Custom Vortec Heads, Edelbrock Performer Intake, Crane 272 Energizer, Hedman Full Length HTC Headers 2006 Dodge Charger SRT8. 1/4 mile 13.3 1973 Z1 900 Kawasaki ( all original)

05-19-2004, 04:38 PM	#2
KutThroatKustoms drag body or die Join Date: May 2004 Location: Redneck country Posts: 79	Dont know about best, but for bottom end, the RPM is 1500-6500 i believe, try maybe the Performer Air Gap, idle to 5500.. with a 3.07 you're not gonna see the 3500 or so i believe range the RPM peaks, very much. imo. but i'm not an expert. __________________ -Bobby-

05-19-2004, 11:12 PM	#6
Stroker Registered User Join Date: Mar 2001 Location: Moore, Ok Posts: 1,149	First, are you building a 350 with auto tranny and stock converter? If this is true then the performer may be a better choice than the RPM intake. If you live and drive in a cold climate I would personally stay away from the AirGap,but if you live down south where its warm then the AirGap design is probably worth the extra cost. Your performance is going to suffer somewhat with the 3.07 gearing, stock converter and the trucks weight. What compression ratio and type of exhaust are you planning to use? Keeping the compression up around 9.5-10.1 will help out the bottom end as will smaller diameter and longer primary header tubes. If you get it all together and your not happy with the off the line performance then you can always make a converter or gearing swap in the future. Good luck........Stroker __________________ 72 SWB parts and pieces Oklahoma

05-20-2004, 12:04 AM	#7
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	They don't make a spread-bore RPM intake for Vortec heads. I emailed them about 3 months ago & they said they have no plans to do so. Maybe if a bunch of people asked, they might reconsider.

05-20-2004, 03:08 AM	#8
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,336	I have a RPM Airgap for vortec heads I may be willing to part with. PM me if interested.



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