Advantage from TC intake?

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Longitudinal
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Advantage from TC intake?

Post by Longitudinal » Mon Nov 20, 2017 6:32 pm

My car has a TC intake manifold for some reason, so I am contemplating what to do.

Does the TC intake flow better/have potential to flow better than the XR4 arrangement?

Since the TC intake is already there, I am contemplating removing the upper portion, welding a piece of plate to the lower to form a plenum base, grinding out the plenum base to make smooth transitions, and welding up a plenum with front facing TB.

Is there a good reason to work with the TC intake? There is a nasty looking notch for distributor clearance. It has been too long since I looked at an XR4 intake to see if it has the same notch; there is a chance that the XR4 doesn't have the notch since the ports are arranged 2 by 2 instead of four in a line.

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Re: Advantage from TC intake?

Post by thesameguy » Mon Nov 20, 2017 6:52 pm

Eh? TC like TurboCoupe? They are essentially the same as the XR4Ti - a couple minor differences due to changes in EEC depending on the year.

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Re: Advantage from TC intake?

Post by merkurdriver » Mon Nov 20, 2017 7:22 pm

The XR4Ti and late Turbo Coupe, SVO "4 in a square" intake manifold is an improved design over the earlier " 4 inline " intake manifold.
Same with the exhaust manifolds, the later exhaust manifolds flow WAY better than the early exhaust manifolds.
However...most forward facing plenum manifolds are built upon the inline set up, so if thats what you want to do then the inline lower will be helpful.

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Re: Advantage from TC intake?

Post by Longitudinal » Mon Nov 20, 2017 7:45 pm

thesameguy wrote:
Mon Nov 20, 2017 6:52 pm
Eh? TC like TurboCoupe? They are essentially the same as the XR4Ti - a couple minor differences due to changes in EEC depending on the year.
TC as in TurboCoupe. Four intake runners in a row on my lower. It's very much a different intake.

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Re: Advantage from TC intake?

Post by Longitudinal » Mon Nov 20, 2017 7:47 pm

merkurdriver wrote:
Mon Nov 20, 2017 7:22 pm
Same with the exhaust manifolds, the later exhaust manifolds flow WAY better than the early exhaust manifolds...
E3 vs. E6, yes of course.

Has anybody flowed the TC lower I have against the 2 by 2 lower?

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Re: Advantage from TC intake?

Post by jkxr4ti » Tue Nov 21, 2017 8:19 am

You may want to check out turboford for flow information.
I seem to remember someone flow bench testing the later style inline intake but I'm not sure on the early version.
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Re: Advantage from TC intake?

Post by my8950 » Wed Nov 22, 2017 9:33 am

Would the base user notice much different between intakes?
meaning difference between the thunderbird short intake vs the XR long runner?
Both 4 in a square style, not inline.

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Re: Advantage from TC intake?

Post by John Brennan » Wed Nov 22, 2017 11:22 am

my8950 wrote:
Wed Nov 22, 2017 9:33 am
Would the base user notice much different between intakes?
meaning difference between the thunderbird short intake vs the XR long runner?
Both 4 in a square style, not inline.
If you mean the longer, XR "butt" upper versus the shorter, "scripted" upper, I can't imagine one would.
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Re: Advantage from TC intake?

Post by dunhamr1 » Mon Nov 27, 2017 5:21 pm

I believe the consensus from Turboford was that there are *slight* differences but nothing major, unless you're starting to build big power. The "4 in a square" setup is usually what is used for a rotated upper (90 or 120 degrees) if you're going with a front mount intercooler and want simpler piping.
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Re: Advantage from TC intake?

Post by Mike McCreight » Mon Nov 27, 2017 10:30 pm

Pics are stuck in P-bucket (turns head, and spits...) of my 40-Bob BIG plenum. There were 2, a smaller one, and one that appears to be about 2 litres in volume. I suspect the googler could find a pic of one. Like this: http://www.stinger-performance.com/Pics/RotatedNPR2.jpg
If you have time, and welding skills, build one.
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Re: Advantage from TC intake?

Post by my8950 » Tue Nov 28, 2017 9:34 am

Mike McCreight wrote:
Mon Nov 27, 2017 10:30 pm
Pics are stuck in P-bucket (turns head, and spits...) of my 40-Bob BIG plenum. There were 2, a smaller one, and one that appears to be about 2 litres in volume. I suspect the googler could find a pic of one. Like this: http://www.stinger-performance.com/Pics/RotatedNPR2.jpg
If you have time, and welding skills, build one.
Pretty much a straight pipe with a TB flange and manifold mating flange it seems...

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Re: Advantage from TC intake?

Post by Mike McCreight » Tue Nov 28, 2017 10:14 am

With a bunch of porting. Bob's work was legendary.
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Re: Advantage from TC intake?

Post by Longitudinal » Wed Nov 29, 2017 10:07 pm

Mike McCreight wrote:
Mon Nov 27, 2017 10:30 pm
Pics are stuck in P-bucket (turns head, and spits...) of my 40-Bob BIG plenum. There were 2, a smaller one, and one that appears to be about 2 litres in volume. I suspect the googler could find a pic of one. Like this: http://www.stinger-performance.com/Pics/RotatedNPR2.jpg
If you have time, and welding skills, build one.
I saw that manifold. I have something similar but more elegant planned if I stick with the Lima engine long enough to intercool.

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