 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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914 Freak!  Group: Members Posts: 17,150 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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| r_towle |
Mar 15 2015, 01:04 PM
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Custom Member Group: Members Posts: 24,645 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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A bit confused on the pictures Mike.
My 911 (3.2 stock) uses one large throttle plate with the dual plenum shape, but it does not use individual throttle plates for each cylinder, and not sure what that might buy you honestly. In my opinion, there are enough other parameters to deal with that adding in individual cylinder tuning just makes it harder.... I think there is a better way to make the motor deliver everything it can, and that would be good head design, proper valve train setup and lots of testing to make sure all cylinders are performing at the same level. Tuning to match might creat some bad stress on the crank and make the motor run poorly due to mis matched power from each cylinder. I would rather sacrifice some power and tune down to the weakest cylinder instead of maxing out each cylinder, just seems like a bad recipe for longevity. Rich |
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| toon1 |
Mar 15 2015, 02:43 PM
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
QUOTE(r_towle @ Mar 15 2015, 12:04 PM)  A bit confused on the pictures Mike. My 911 (3.2 stock) uses one large throttle plate with the dual plenum shape, but it does not use individual throttle plates for each cylinder, and not sure what that might buy you honestly. In my opinion, there are enough other parameters to deal with that adding in individual cylinder tuning just makes it harder.... I think there is a better way to make the motor deliver everything it can, and that would be good head design, proper valve train setup and lots of testing to make sure all cylinders are performing at the same level. Tuning to match might creat some bad stress on the crank and make the motor run poorly due to mis matched power from each cylinder. I would rather sacrifice some power and tune down to the weakest cylinder instead of maxing out each cylinder, just seems like a bad recipe for longevity. Rich The last part of your statement is confusing. What your describing(the way I'm understanding it) is blue printing, which is a good . How would improving intake air flow un balance the cylinders and be hard on the crank? |
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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 McMark I suspect the 911 intake developed two 'plenum... Mar 15 2015, 05:26 PM toon1
I suspect the 911 intake developed two 'plenu... Mar 15 2015, 05:55 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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