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      10-24-2021, 05:49 PM   #133
tree233
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I'm curious how light the n54 intake is.
Does anyone have a 3im & n54 intake that they can weigh?

I have an e30 which I stripped back in the day. I was able to remove over 100kg and the acceleration and cornering increase was amazing! So was the NVH tho hahaha

I'm resisting the urge on my 1er, but if I can find enough liveable things to remove or replace I'll do it.
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      10-24-2021, 07:50 PM   #134
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The 3 stage with both disas is not much above 10-12 lbs. Each disa is about 1lb so there's not much weight to save there
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      11-30-2021, 03:12 AM   #135
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Hello,

This topic is better for my question.


I would like to calculate the optimum length of the N52B30 intake runner, etc. with a pipemax program.
I plan on using a custom 3IM or N54 manifold. Or something else interesting.

I have been trying to find the exact specs of the N52B30 engine. Euro spec engine (e81 130i 2007 MSV80).
I previously had good data on the N52 engine, as well as the M62 and other engines and values on the Pipemax, but the computer died and I lost all the data.

Which values are not correct?
Images show metric units and one image shows an inch.






Intake runner is about 315-320mm long in 3IM (from valve to bellmouth end)
The N54 intake manifold runner seems to be clearly shorter, but I haven't found any information on the N54 runner's length.

At the values I used Pipemax. The 3IM runner length of the optimal Peak HP is approx. 5800rpm.
I suspect some values are incorrect.

For comparison.
I tried the N62B48 intake for the M62b46 engine with more aggressive cams, headers, etc.
Peak HP is exactly what I got from PipeMax.
But I won't use this N62 intake anymore next year. I get a little more power, but it's close to 7000rpm vs. m60 intake where the max HP is just over 6000rpm. But this was just an experiment. Below are some MAF values.

N62 intake "short" https://aijaa.com/ZD81wR
N62 intake "long" https://aijaa.com/CIcR1Y
M60 intake https://aijaa.com/nriSF9

Last edited by MOD.Works; 11-30-2021 at 06:14 AM..
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      12-01-2021, 12:55 PM   #136
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So you want from the head to the end of the runners on the n54 and n52 intake manifolds? What about from the head down to the valves, I'll be pulling my n54 manifold off in the next few weeks to pretty it up? I was always curious, but never got to crunching the numbers.
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      12-01-2021, 03:21 PM   #137
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Yes, I would like to know the n54 runner length.

That would help me.
I also need n52b30 cam spec. Preferably a graphic diagram etc. I would be interested in what kind of profile n52b30 cams is.



N52 from the head to the valves is about 140mm.
The length of the n52b30 3IM runner is about 170-180mm.
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