The RPM Air-Gap is awesome! 
Should I swap the intake mainfold?
Thread Starter
Pro
Joined: Aug 2008
Posts: 744
Likes: 19
From: Salzburg Austria
Should I swap the intake mainfold?
Hello!
I have a 427ci BBC with a deadline of 5500 rpm´s. Now I figured out, that my intake mainfold (Edelbrock Torker II), is desiged for high rpm´s. So I´m considering to swap my intake mainfold to a Edelbrock Performer.
Does it make sense to do this? Will I get any gain of torque or horse power?
Advices would be appreciated.
Regards, Günther
I have a 427ci BBC with a deadline of 5500 rpm´s. Now I figured out, that my intake mainfold (Edelbrock Torker II), is desiged for high rpm´s. So I´m considering to swap my intake mainfold to a Edelbrock Performer.
Does it make sense to do this? Will I get any gain of torque or horse power?
Advices would be appreciated.
Regards, Günther
Melting Slicks
Joined: Mar 2007
Posts: 2,100
Likes: 12
From: Frederick Maryland
Basically what will happen with a dual plane intake like the Performer is you'll have a change in the rpm ranges where power and torque are produced. You'll notice better torque in the low to mid rpm band where the single plane Torker makes horsepower and torque in the higher rpm ranges.
Which is best for you depends on how you drive the car. The Performer will give better idle and take off for street driving. If you spend a lot of time at high rpm's, stick with the Torker.
There will be some different of horsepower and torque production, but not that much...it's mostly shifted to different rpm bands.
Which is best for you depends on how you drive the car. The Performer will give better idle and take off for street driving. If you spend a lot of time at high rpm's, stick with the Torker.
There will be some different of horsepower and torque production, but not that much...it's mostly shifted to different rpm bands.
Drifting
Joined: Oct 2005
Posts: 1,528
Likes: 148
From: East London/SW Essex UK
Basically what will happen with a dual plane intake like the Performer is you'll have a change in the rpm ranges where power and torque are produced. You'll notice better torque in the low to mid rpm band where the single plane Torker makes horsepower and torque in the higher rpm ranges.
Which is best for you depends on how you drive the car. The Performer will give better idle and take off for street driving. If you spend a lot of time at high rpm's, stick with the Torker.
There will be some different of horsepower and torque production, but not that much...it's mostly shifted to different rpm bands.
Which is best for you depends on how you drive the car. The Performer will give better idle and take off for street driving. If you spend a lot of time at high rpm's, stick with the Torker.
There will be some different of horsepower and torque production, but not that much...it's mostly shifted to different rpm bands.
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Günther, if you're limiting RPM to only 5500 and not spending much time there I'd go for the Performer, which is designed for idle-5500 performance.
As for gaining more torque or horsepower, I basically agree with Roughrider's post, as you can't have one without the other. In this case, it's more a matter of where the torque and power are made. That said, while a single plane might ultimately produce more power on top end with the right combo, IMCO at 5500 RPM you're just not getting nearly far enough into its designed operating range to really benefit.
FWIW, there are guys here with Air-Gaps and even Holley Strip Dominators under L88 hoods w/CAI. Going with the latter myself, but then my redline/limiter is going to be 7200.
As for gaining more torque or horsepower, I basically agree with Roughrider's post, as you can't have one without the other. In this case, it's more a matter of where the torque and power are made. That said, while a single plane might ultimately produce more power on top end with the right combo, IMCO at 5500 RPM you're just not getting nearly far enough into its designed operating range to really benefit.
FWIW, there are guys here with Air-Gaps and even Holley Strip Dominators under L88 hoods w/CAI. Going with the latter myself, but then my redline/limiter is going to be 7200.
Racer
Joined: Nov 2009
Posts: 423
Likes: 7
From: Utah
From what I understand, we BBC folks need more help at the upper RPMs instead of the lower end because we already produce enough torque down low. I don't spend much time above 4-5K so a non-Torker manifold might be more useful, but then there's the hood fitment.
I don't know of any intakes other than the Torker or the stock manifold that'll fit under the stock BB hood. I'm surprised to hear folks have issues with some manifolds fitting under an L88 hood also.
I don't know of any intakes other than the Torker or the stock manifold that'll fit under the stock BB hood. I'm surprised to hear folks have issues with some manifolds fitting under an L88 hood also.
Last edited by shrekviper; Aug 26, 2010 at 06:30 PM.
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
If you are willing to run an L88 hood, the BB Edle RPM air gap is THE BEST all around intake for BBs that are 6500 rpms and less. Pick up power everywhere with one...even on stock engines. It will support 650+hp untouched/out of the box. I know of a few that made almost 700hp with Ported/worked RPM air gap.
If you are staying stock BB hood, I am not sure even the regular Performer will fit. It is actually pretty tall, where as the TII is flat as a pancake. Both manifolds suck. I would think with some porting/plenum work, the TII could be made to work "ok" for a mild motor. Not a lot of options for a stock BB hood.
If you are staying stock BB hood, I am not sure even the regular Performer will fit. It is actually pretty tall, where as the TII is flat as a pancake. Both manifolds suck. I would think with some porting/plenum work, the TII could be made to work "ok" for a mild motor. Not a lot of options for a stock BB hood.
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Do you know how much is it taller than the Torker II?
Burning Brakes
Joined: May 2008
Posts: 1,116
Likes: 5
From: Middleburg Florida
Have you considered the GM Performance Parts intake (I'm using PN 12363420)? Remember, the intake should match up with the cam that you've got too. This thing will fit under an L88 hood (depending on the carb and air cleaner of course) and pulls from 1500 - 6500 according to GM.
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
Have you considered the GM Performance Parts intake (I'm using PN 12363420)? Remember, the intake should match up with the cam that you've got too. This thing will fit under an L88 hood (depending on the carb and air cleaner of course) and pulls from 1500 - 6500 according to GM.
Burning Brakes
Joined: May 2008
Posts: 1,116
Likes: 5
From: Middleburg Florida
I don't blame you for not wanting to give up your hood, I didn't mean to imply anyone should. I was simply pointing out that this is a good performing intake that fits under the L88 hood.
Thread Starter
Pro
Joined: Aug 2008
Posts: 744
Likes: 19
From: Salzburg Austria
I also don´t want to give up my BB hood. You wrote that the intake must match with the cam, hmm, I don´t know which cam I have. 
The motor runs really verry well but I thought with the right intake mainfold, I would gain the torque and horsepower.
Is there no aftermarket intake that fits under a BB-hood and increases the torque/horsepower?
Günther
The motor runs really verry well but I thought with the right intake mainfold, I would gain the torque and horsepower.
Is there no aftermarket intake that fits under a BB-hood and increases the torque/horsepower?
Günther
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Sorry, forgot about your hood when recommending the Performer. So, IIRC the LS6 aluminum dual plane is about it. FWIW, it can be matched to oval ports with a little effort and some proper epoxy, where applicable. Or, you could always cough up the bucks and go with 3x2's.
Burning Brakes
Joined: Oct 2002
Posts: 914
Likes: 14
From: Aberdeen, Scotland
a few more intakes?
I have a Holley Street Dominator with a Q jet that is fixing to get installed under my stock hood. I have a few drop down bases and air cleaner combos to help this along.
I have wondered about an Inglese set up with DCOE side drafts grafted onto an Offenhauser low profile dual quad intake. That should be possible. Also the Inglese XFI system looks pretty low; but expensive!!
http://www.carburetion.com/Weber/wildv8.asp
http://www.inglese.com/Catalog/2009/...log_2009_3.pdf
"Our twin sidedraft Weber system also features excellent hood
clearance – with standard assemblies measuring just 6 5/8” tall."
The SBC set with with the side drafts looks possible as well. Anyone seen or heard of this set up? Its pretty trick.
Dynatek's classic FI; looks like they could come up with a sidetrack type of set up as well; pretty cool but sure to break my bank.
carbster09
I have wondered about an Inglese set up with DCOE side drafts grafted onto an Offenhauser low profile dual quad intake. That should be possible. Also the Inglese XFI system looks pretty low; but expensive!!
http://www.carburetion.com/Weber/wildv8.asp
http://www.inglese.com/Catalog/2009/...log_2009_3.pdf
"Our twin sidedraft Weber system also features excellent hood
clearance – with standard assemblies measuring just 6 5/8” tall."
The SBC set with with the side drafts looks possible as well. Anyone seen or heard of this set up? Its pretty trick.
Dynatek's classic FI; looks like they could come up with a sidetrack type of set up as well; pretty cool but sure to break my bank.
carbster09
