Is there one intake manifold above them all? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigcarguy · 09-03-2002, 04:21 PM

I'm hopefully gonna put Vortech heads(pre-drilled for use with 86 and earlier style manifolds) and might look into a new manifold. Are they all the same, or are some better than others? This will be a daily driver, but as much power as possible is what I'm looking for. I already have an Edlebrock performer intake, but it's about 5 years old and pretty well crusted up in the coolant passages. If there's no real difference, then I might just clean this one up, but then again I think weiands are only like $90...

Mike C · 09-03-2002, 10:28 PM

If you are thinking about a new intake anyways, don't bother redrilling the heads and buy either the GM Vortec or Performer Vortec. While your manifold will "fit" the redrilled heads, it doesn't accurately line up with the raised ports of the Vortec heads. This is where they gain most of their flow benefits so you are shooting yourself in the foot by not running a Vortec specific intake.

Longhorn Man · 09-03-2002, 10:55 PM

Agreeing with the last post, I would like to add that is you have a mild cam, run the performer vortec...a wild one...got with the RPM. I have run both intakes on both types of engines.
A mis matched intake/cam, is worse than a stock engine...worst case cenerio...it'll feel like a sick inline. (performer RPM on stock 305 fits that last description)

HotRod929 · 09-04-2002, 12:43 AM

How bout a performer RPM on a 350. Would that work well?

Longhorn Man · 09-04-2002, 01:32 AM

If you have the cam to support it, yeah.
That's what I have on my GMC right now. But it has quite a bit of cam.

hjalbert · 09-04-2002, 01:47 AM

my truck runs like crap, its a 350, hei, and to my knowledge i dont have anythign but a stock cam, and i have no idea of how to tell what cam i have. right now i have a performer on there, what woudl you reccomend andy, thanks

Longhorn Man · 09-04-2002, 02:16 AM

Well, the performer is PERFECT for an upgrade on a stock engine. If you have tried tuning it, and it passes compression test and you've tried all teh normall stuff, then you may be needing a carb.
But make sure you have looked at EVERYTHIGN.
What are your exact symptoms that = running like crap?

hjalbert · 09-04-2002, 02:28 AM

well, i cant say it really runs like crap, i did drive it 2400 miles no problem, but when its idleing, it is real rough at times, like to die, when i hit the brakes, it likes to die. (thats scary sometimes) sometimes it seems it should have more power then it does when going up hills and stuff. im not sure but i may have a vacumm leak, i am going to find out soon though, i am getting motivated to get this beast going right.

09-03-2002, 04:21 PM	#1
bigcarguy Finally a Bulldawg Join Date: Apr 2001 Location: Athens, Georgia Posts: 220	Is there one intake manifold above them all? I'm hopefully gonna put Vortech heads(pre-drilled for use with 86 and earlier style manifolds) and might look into a new manifold. Are they all the same, or are some better than others? This will be a daily driver, but as much power as possible is what I'm looking for. I already have an Edlebrock performer intake, but it's about 5 years old and pretty well crusted up in the coolant passages. If there's no real difference, then I might just clean this one up, but then again I think weiands are only like $90... __________________ Ah yes, the college life. School all morning, work all night, study when ya can. Uh...

09-03-2002, 10:28 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	If you are thinking about a new intake anyways, don't bother redrilling the heads and buy either the GM Vortec or Performer Vortec. While your manifold will "fit" the redrilled heads, it doesn't accurately line up with the raised ports of the Vortec heads. This is where they gain most of their flow benefits so you are shooting yourself in the foot by not running a Vortec specific intake. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

09-04-2002, 12:43 AM	#4
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	How bout a performer RPM on a 350. Would that work well? __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

09-04-2002, 01:47 AM	#6
hjalbert cracker Join Date: Sep 2001 Location: Wilmington, NC Posts: 1,021	my truck runs like crap, its a 350, hei, and to my knowledge i dont have anythign but a stock cam, and i have no idea of how to tell what cam i have. right now i have a performer on there, what woudl you reccomend andy, thanks __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Harry John Albert III located in Phoenix, AZ 1972 GMC JIMMY, 1969 lwb Chevy Frame, 1999 bmw k1200 ltc 1992 Kawasaki concours 1991 bmw k75 1973 cortez motorhome

09-04-2002, 02:28 AM	#8
hjalbert cracker Join Date: Sep 2001 Location: Wilmington, NC Posts: 1,021	well, i cant say it really runs like crap, i did drive it 2400 miles no problem, but when its idleing, it is real rough at times, like to die, when i hit the brakes, it likes to die. (thats scary sometimes) sometimes it seems it should have more power then it does when going up hills and stuff. im not sure but i may have a vacumm leak, i am going to find out soon though, i am getting motivated to get this beast going right. __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Harry John Albert III located in Phoenix, AZ 1972 GMC JIMMY, 1969 lwb Chevy Frame, 1999 bmw k1200 ltc 1992 Kawasaki concours 1991 bmw k75 1973 cortez motorhome

09-03-2002, 10:55 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Agreeing with the last post, I would like to add that is you have a mild cam, run the performer vortec...a wild one...got with the RPM. I have run both intakes on both types of engines. A mis matched intake/cam, is worse than a stock engine...worst case cenerio...it'll feel like a sick inline. (performer RPM on stock 305 fits that last description)

09-04-2002, 01:32 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	If you have the cam to support it, yeah. That's what I have on my GMC right now. But it has quite a bit of cam.

09-04-2002, 02:16 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Well, the performer is PERFECT for an upgrade on a stock engine. If you have tried tuning it, and it passes compression test and you've tried all teh normall stuff, then you may be needing a carb. But make sure you have looked at EVERYTHIGN. What are your exact symptoms that = running like crap?



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