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HOW is it possible for these to flow any better than a stock TD piece?
by
R.O.R-2.0
on 18 Sep, 2012 16:07
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ive never thought it could be possible for these to flow a whole hell of alot better than the stock TD manifold..
anyone got any numbers on these manifolds?
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#1
by
RabbitJockey
on 18 Sep, 2012 16:58
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I think it would flow better just from the larger Inlet piece and all the runners being aimed a bit nice, its not gas intake but I'd think it's easily better than the older diesels ones
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#2
by
745 turbogreasel
on 18 Sep, 2012 18:02
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And the D ports hold a good bit more air.
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#3
by
Alcaid
on 18 Sep, 2012 23:01
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Those D ports fit nicely with the AAZ head once going Franken
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#4
by
carrizog60
on 18 Sep, 2012 23:52
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how does it compare with a 1.9D intake(from 1y engines,looks like a gasser with long runners)?
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#5
by
theman53
on 19 Sep, 2012 06:35
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IDK, Looks to me like #1 would lose the battle for fighting for air. That is if the inside is open just like the reg. 1.6 TD intake. And 2 and 3 look like they would still get the most of it as their runners look 2" shorter than 1 and 4. I think it would be better in the fact that it is longer runners than the standard TD intake, but not much that is why I am building mine not buying one of these.
I would still like to see #s just like you Kevin. I could be way off on my guess and want it to be confirmed either way.
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#6
by
R.O.R-2.0
on 19 Sep, 2012 11:37
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IDK, Looks to me like #1 would lose the battle for fighting for air. That is if the inside is open just like the reg. 1.6 TD intake. And 2 and 3 look like they would still get the most of it as their runners look 2" shorter than 1 and 4. I think it would be better in the fact that it is longer runners than the standard TD intake, but not much that is why I am building mine not buying one of these.
I would still like to see #s just like you Kevin. I could be way off on my guess and want it to be confirmed either way.
i would think a 1Y intake would be leaps and bounds better than the PD intake..
it still looks like its gonna bias #2 & #3 tho.. but it looks like #4 might get a LITTLE more air than the stock TD mani..
but it looks like #1 is still getting the shi**y end of the stick..
and all 4 runners are different lengths.. i dont like that..
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#7
by
regcheeseman
on 20 Sep, 2012 01:39
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There's a lot of BS spoken about these on the net - just because they are attached to an engine that makes a lot of power, they must be good.
I believed the hype until I saw one for real and thought that's little improvement on the old TD manifold.
I'll stick to the 1Y manifold thanks.
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#8
by
8v-of-fury
on 20 Sep, 2012 06:04
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What turbo are you running to have such a manifold?
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#9
by
rallydiesel
on 20 Sep, 2012 10:53
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The data I've seen indicates that in order for the intake runners to be of any harmonic benefit to a tdi engine, they would have to be over 30 cm long. Plus, the use of a turbo basically negates any benefit of a tuned intake system. As far as the benefits of unequal runner lengths in the new VW intakes, I have not seen any hard data yet.
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#10
by
745 turbogreasel
on 20 Sep, 2012 13:42
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That may be , but even a turbo benefits from 'doesn't suck'.
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#11
by
GTiTDi
on 20 Sep, 2012 14:23
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FWIW, the PD100-130 intakes are WAAAY better than the stock 1Z/AHU manifold, at least it doesn't neck down to just over an inch (ID) and doesn't have the crap EGR valve that is unremovable
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#12
by
theman53
on 20 Sep, 2012 19:04
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The data I've seen indicates that in order for the intake runners to be of any harmonic benefit to a tdi engine, they would have to be over 30 cm long. Plus, the use of a turbo basically negates any benefit of a tuned intake system. As far as the benefits of unequal runner lengths in the new VW intakes, I have not seen any hard data yet.
30cm is only around 11.8 inches, which mine I am making will have a longer shot than that to the inake vavle. 11.8" runner is not the intake manifold runner length, that is total runner length from the back of the intake closed valve to the end of the runner. So were it bells out or ends at the plenum is the end and the important part. It is a 4th harmonic, but it should work. Basically if I can make my total length of the air column 13" peak torque will be achieved at 2,800rpm IF all the formulas are accurate that I have been using to come up with this. The other thing I have been reading is that it doesn't really matter if the air is blown or sucked, it still will bounce off the intake valve when closed, travel like a sound wave back to the plenum, and then back down to the intake valve...up and down until it is open again.
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#13
by
gldgti
on 20 Sep, 2012 23:45
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The 1Y manifold is the sex IMO
As for turbo's... well in a mk1 its pretty easy:
and I would do the same with a trapezoidal flange manifold for hte bigger turbo's... I guess you might also manage with a VNT.
I don;t know how it would be possible on a mk2/3 though :-(
I have used the stock TD, PD160 and 1Y manifolds all on 1.9 TD engines, and I would say that the 1Y kicks butt over the others, but on my mk3, with everything else the same, the PD150 manifold gave me about an extra 5-8whp (dyno'd). That was on an engine making 125whp.
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#14
by
Alcaid
on 20 Sep, 2012 23:52
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I have used the stock TD, PD160 and 1Y manifolds all on 1.9 TD engines, and I would say that the 1Y kicks butt over the others, but on my mk3, with everything else the same, the PD150 manifold gave me about an extra 5-8whp (dyno'd). That was on an engine making 125whp.
So stock --> PD150/PD130 intake gave you +5-8whp in dyno? Have you dyno'd the 1Y intake also?