Latest Pics and Status Of My Turbo-NA-Bridgeport Project (Project Tina)
01-17-06, 12:45 AM
#76
Originally Posted by iceblue
The NA manifold has to make several 180 degree bends during its process. Where the TII only makes one 120degree bend or so. Even though the runners are the same diameter the overall length and angles are less on the TII.
01-17-06, 04:44 PM
#77
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Originally Posted by rotarygod
I do have to ask, why did you taper down the primary runners mid way through? Why didn't you just use the smaller size all the way into the plenum chamber? The lack of transition would actually have let it flow better and it would have been less work.
Originally Posted by iceblue
The NA manifold has to make several 180 degree bends during its process. Where the TII only makes one 120degree bend or so. Even though the runners are the same diameter the overall length and angles are less on the TII.
The NA upper is not great for wildly ported engines. The TII intake is better since it's less complicated.
My purpose for the LIM is to remove all them block offs make it look much bettor is all it was for. As well you could make the runners a tad larger. The UIM was a tossup my original plan was to use the FD UIM for 1 it dose not have the TMIC holes on it, so the FD UIM looks bettor. I have not seen any performance increases that are stated outside of a few butts that say moderately bettor. I am going a lot of looks and would like performance with it but not willing to sacrifice performance for looks.
If this is for a 6 port, keep the 6 port lower and either make an adapter to fit the TII upper or make your own upper.
01-17-06, 07:58 PM
#78
Rotary Enthusiast
aaron can I ask why you didn't go the way or the plenum then a ida throttle body set up then the lim, its just what a lot of aussies's run and wondering which performs better.
im at the stage when in looking at both but done know why one would be better then the other, or what different characteristics one would have over the other.
I guess with a ida set-up it would flow more as you can have 2x 50 dia. throttle bodies ? (only just though.)
just wondering your thinking.
cheers
im at the stage when in looking at both but done know why one would be better then the other, or what different characteristics one would have over the other.
I guess with a ida set-up it would flow more as you can have 2x 50 dia. throttle bodies ? (only just though.)
just wondering your thinking.
cheers
01-17-06, 10:33 PM
#79
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Originally Posted by Havoc
I guess with a ida set-up it would flow more as you can have 2x 50 dia. throttle bodies ?
01-17-06, 10:58 PM
#80
Rotary Enthusiast
sorry thought it was a 70.
but still what about the justification between having the plenum b4 or after the TB ? just want to know aarons thought on having it after the TB when so many ppl down here have it before.
but still what about the justification between having the plenum b4 or after the TB ? just want to know aarons thought on having it after the TB when so many ppl down here have it before.
01-17-06, 11:21 PM
#81
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Unless you have multiple throttles the plenum always goes after the TB. It's a bit hard to do it any other way. All those people you're referring to have IDA-style TB's with multiple throttles.
Last edited by NZConvertible; 01-17-06 at 11:24 PM.
01-18-06, 09:08 AM
#83
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Originally Posted by Havoc
aaron can I ask why you didn't go the way or the plenum then a ida throttle body set up then the lim, its just what a lot of aussies's run and wondering which performs better.
I guess with a ida set-up it would flow more as you can have 2x 50 dia. throttle bodies ? (only just though.)
but still what about the justification between having the plenum b4 or after the TB ? just want to know aarons thought on having it after the TB when so many ppl down here have it before.
When dealing with intake's it's very beneficial to look at how the big manufacturers do it since a single person generally does not have the resources to simulate and test hundreds of designs. Most OEM intakes have a plenum of some type and it is most always after the throttle body.
This is the one time I wish I had attended higher education then highschool and taken a fluid dynamics course.
01-19-06, 10:16 AM
#86
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I work at a computer company. 99% of our business is networking, on site service, web hosting and application development. The other 1% can range anywhere from robotics to industrial control and monitoring to building mobile satellite Internet trailers. Without going too far off topic, one of the greatest myths in Canada/USA is that you cannot succeed unless you have a University/College diploma...
01-19-06, 12:39 PM
#87
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I'm well aware of that myth, and it may just be a myth but it is alot easier to succed/be recognised witha degree. But back on topic. Beautiful car man, can't wait till she's all back together and tuned. I'm sure she'll be a wicked ride.
Dom
Dom
01-29-06, 04:17 PM
#88
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I was just looking at some threads about custom intakes and figured I'd add the links here:
About how the dynamic chamber works, runner lengths, modifying stock S4 intake, etc.
https://www.rx7club.com/forum/showthread.php?t=405896
How to figure out intake runner length (lots of good math and info)
https://www.rx7club.com/forum/showthread.php?t=199788
Open plenum intakes (carb discussion)
https://www.rx7club.com/forum/showthread.php?t=223100
Modifying secondary injector locations on NA intake (good pictures)
https://www.rx7club.com/forum/showthread.php?t=123035
Calculating intake runner length and plenum volume
https://www.rx7club.com/forum/showthread.php?t=94362
Some random discussion
https://www.rx7club.com/forum/showthread.php?t=153420
About how the dynamic chamber works, runner lengths, modifying stock S4 intake, etc.
https://www.rx7club.com/forum/showthread.php?t=405896
How to figure out intake runner length (lots of good math and info)
https://www.rx7club.com/forum/showthread.php?t=199788
Open plenum intakes (carb discussion)
https://www.rx7club.com/forum/showthread.php?t=223100
Modifying secondary injector locations on NA intake (good pictures)
https://www.rx7club.com/forum/showthread.php?t=123035
Calculating intake runner length and plenum volume
https://www.rx7club.com/forum/showthread.php?t=94362
Some random discussion
https://www.rx7club.com/forum/showthread.php?t=153420
01-30-06, 11:10 AM
#89
That one that I did where I cut open the dynamic chamber, moved the injectors, and used a Mustang tb turned into one big flame fest from people who actually need to see everything in order to believe it. It's ironic how the biggest whiners in that thread were also the ones that always make claims but never show any proof. That setup did run with the stock ecu although very far from optimal and with alot of rigging to make work. When I used a Haltec later it worked much better. The throttle response was very touchy and there was a loss of low end power. Top end was great. I have since gone back to the standard S5 intake manifold because I have a few things to play with. I have a bunch of different manifolds that I swap out from time to time just to see how they work. I always seem to like one characteristic of each of them but am never satisfied with them as a whole. That's what compromise is all about.
01-30-06, 07:59 PM
#90
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Originally Posted by rotarygod
That one that I did where I cut open the dynamic chamber, moved the injectors, and used a Mustang tb turned into one big flame fest from people who actually need to see everything in order to believe it. It's ironic how the biggest whiners in that thread were also the ones that always make claims but never show any proof.
That setup did run with the stock ecu although very far from optimal and with alot of rigging to make work. When I used a Haltec later it worked much better. The throttle response was very touchy and there was a loss of low end power. Top end was great
07-19-07, 10:08 PM
#91
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where do you base your design off of for your intake? do you do calculations with fluids to determine them? and how's it going so far? get any hp gains with it, better than the stock one?
07-20-07, 09:08 AM
#92
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rotarygod has posted a great topic in the past regarding calculating plenum volume and runner size. Should be an easy search under his name with "calculating runner size" as the keywords.
I just used an old book from the library.
I just used an old book from the library.
11-24-08, 10:01 AM
#95
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Holy thread resurrection!
Just to add something useful, I think I'll be making some mods to that intake. It has performed very well but I need somewhere to mount a BAC valve. Not having ECU idle control is a major annoyance. I'll likely just weld a flange to the bottom of the front "box".
Additionally I will be making an entirely new manifold at some point to take advantage of what I've learned by making and tuning this one.
Just to add something useful, I think I'll be making some mods to that intake. It has performed very well but I need somewhere to mount a BAC valve. Not having ECU idle control is a major annoyance. I'll likely just weld a flange to the bottom of the front "box".
Additionally I will be making an entirely new manifold at some point to take advantage of what I've learned by making and tuning this one.
11-24-08, 11:01 AM
#96
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Holy thread resurrection!
Just to add something useful, I think I'll be making some mods to that intake. It has performed very well but I need somewhere to mount a BAC valve. Not having ECU idle control is a major annoyance. I'll likely just weld a flange to the bottom of the front "box".
Additionally I will be making an entirely new manifold at some point to take advantage of what I've learned by making and tuning this one.
Just to add something useful, I think I'll be making some mods to that intake. It has performed very well but I need somewhere to mount a BAC valve. Not having ECU idle control is a major annoyance. I'll likely just weld a flange to the bottom of the front "box".
Additionally I will be making an entirely new manifold at some point to take advantage of what I've learned by making and tuning this one.
08-01-10, 08:51 PM
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