 Type IV plenum intake manifold questions..., Why single and not double like the 911 motor? |
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| Mueller |
 Mar 14 2015, 10:28 AM
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#1
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914 Freak!  Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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Has anyone made a dual plenum like used on the 911 engines for a Type IV?
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| McMark |
Mar 15 2015, 05:26 PM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I suspect the 911 intake developed two 'plenums' mostly due to space constraints. I seriously doubt there is a payoff to the development for a dual plenum for the T4.
Also, IMHO, if you're going to modern fuel injection in a street car, one of the huge benefits is being able to use a single throttle body. Remember that any number of throttle bodies (more than 1) must still be accessible and adjustable for syncing, just like carbs. PITA. Aside from variable intake length (VarioRam) and variable valve timing (VarioCam) most engine engineering developments are going to be of more benefit in the fuel economy and emissions department. If you're looking to increase engine output, as in horsepower or torque, stick to the basics. Displacement and forced induction. There isn't a fancy 2.0 that will compete with a 2270. |
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| toon1 |
Mar 15 2015, 05:55 PM
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#3
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
QUOTE(McMark @ Mar 15 2015, 04:26 PM)  I suspect the 911 intake developed two 'plenums' mostly due to space constraints. I seriously doubt there is a payoff to the development for a dual plenum for the T4. Also, IMHO, if you're going to modern fuel injection in a street car, one of the huge benefits is being able to use a single throttle body. Remember that any number of throttle bodies (more than 1) must still be accessible and adjustable for syncing, just like carbs. PITA. Aside from variable intake length (VarioRam) and variable valve timing (VarioCam) most engine engineering developments are going to be of more benefit in the fuel economy and emissions department. If you're looking to increase engine output, as in horsepower or torque, stick to the basics. Displacement and forced induction. There isn't a fancy 2.0 that will compete with a 2270. My Idea is more for efficiency, not to increase HP. I just want the motor to breathe easier. The 1.7 is severely under aspirated.....IMHO. All the corners it turns to get into the plenum and transitions into the runners can be easily improved on. |
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Posts in this topic
Mueller Type IV plenum intake manifold questions... Mar 14 2015, 10:28 AM
Bob L. Someone here has played around with it. I forget w... Mar 14 2015, 10:44 AM Mike Bellis Maybe it's because the 911 unit is engineered ... Mar 14 2015, 11:03 AM Mark Henry I played with the design, it would work but only a... Mar 14 2015, 05:01 PM r_towle I recall seeing a race car running two full Djet s... Mar 14 2015, 05:04 PM
Mark Henry
I recall seeing a race car running two full Djet ... Mar 14 2015, 05:11 PM r_towle
I recall seeing a race car running two full Djet... Mar 15 2015, 12:57 PM Mark Henry Here.... I'll save you a shitload of research ... Mar 14 2015, 05:22 PM type47 Tangerine Racing system as seen at Hershey
Mar 14 2015, 09:20 PM Jake Raby When I've gone this way the result was an even... Mar 14 2015, 10:28 PM Mark Henry
When I've gone this way the result was an eve... Mar 15 2015, 07:05 AM toon1
When I've gone this way the result was an eve... Mar 15 2015, 09:24 AM toon1 Mike, look up Hemholtz resinator and supercar int... Mar 14 2015, 10:28 PM Mueller If you notice on the 911 engine, they are using in... Mar 15 2015, 09:41 AM toon1 There is some cool stuff out there. I just seen a ... Mar 15 2015, 09:45 AM Mueller
There is some cool stuff out there. I just seen a... Mar 15 2015, 11:33 AM r_towle A bit confused on the pictures Mike.
My 911 (3.2 ... Mar 15 2015, 01:04 PM toon1
A bit confused on the pictures Mike.
My 911 (3.2... Mar 15 2015, 02:43 PM r_towle
[quote name='McMark' post='2160471' date='Mar 15 ... Mar 15 2015, 08:35 PM McMark To what end? Why spend the time engineering? And... Mar 15 2015, 06:39 PM larss Not that it adds wery much but this is my expetime... Mar 16 2015, 02:18 AM |
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