N52 intake shootout

[hoveringuy]

Just for the record, I got to literally run a few laps yesterday while I was being evaluated for instructor and managed to run-down a really nice E36 M3. https://youtu.be/2mdUblZVTh0

This was on the dual-DISA intake and I will admit that it runs out of breath starting at 6500 but is still pretty capable.

I got to ride in a few e36 M3's during my evaluation and I am so impressed by how PLANTED those cars are! I think my saving grace is lightness, braking, and I match them in power.

My winter project will be to follow adam.nonis in crafting an intake that's easily streetable while still wailing at the track.

[Donkeyshins]

Also, if you haven't seen it, 22RPD has a 3D printed intake manifold that gets rid of EVERYTHING and just runs in Alfa-N mode. https://22rpd.com/blog/the-future-of...esting-sign-up

Given the S54 vs. N52 intake port spacing should be close (since they're both 91mm cylinder spacing on-center and we know that with a flange replacement that the S54 exhaust manifold bolts right up to the N52 head) and given the >90% similar dimensions of the intake ports of the S54 (52mm x 33.5mm) and N52 (50.2mm x 30.2mm) cylinder heads, it would be nice if someone (22RPD, perhaps) could package together a complete intake system that combines an airbox, S54 ITBs (with adapter plate and bracket to mount the S54 throttle-by-wire actuator) and S54 MAF, and flow-optimized N52 intake runners into a complete package with associated tune.

[hoveringuy]

Donkeyshins The S54 intake could be adaped, except the actuator or something on the forward runner interferes with the oil filter housing

Also, the magic of ITB is lost on the N52, because the N52 already has ITB's, the valves! The throttle body is actually just a safety backup and doesn't normally do shit.

But yeah, there needs to be an inbetween intake; the N54 one is optimized for forced induction and the DISA on for soccer moms with automatic transmissions.

I actually like the M50 intake a lot, I put that on my old M54, I see something similar.

[moatilliatta]

I was thinking of just coupling a hacked off N52 plastic manifold a few inches from the flange, Coupled up to the S54 airbox and just run valvetronic for your throttle..

Rabid Racing Development may have an N52 to S54 Itb in the works.

[hoveringuy]

I have a concept of a plan.

Utilizing the runners from a stock intake and lopping-off all the byzantine stuff behind it yields something that looks a lot like an M50 manifold, which is the O.G.

It would clear brake boosters and make a little better bottom-end than the N54 manifold.

[HCMW Adam]

I looks like the "flange" of the runner portion has plenty of meat to clamp to or run bolts through and attach a home-did aluminum plenum to the throttle body side. I might have one of these manifolds laying around. I might look at that area a little closer and see if it looks reasonable to attach to.

[adam.nonis]

I looks like the "flange" of the runner portion has plenty of meat to clamp to or run bolts through and attach a home-did aluminum plenum to the throttle body side. I might have one of these manifolds laying around. I might look at that area a little closer and see if it looks reasonable to attach to.

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[HCMW Adam]

Hot dang man! That is really slick looking!

[adam.nonis]

Hot dang man! That is really slick looking!

Didn't work out as planned though. Steve is leveraging this to do V2 though. Good news is that the runners/flange can be reused and the plenum can go through variations.


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[hoveringuy]

Hot dang man! That is really slick looking!

Adam's dyno results were really puzzling

The idea is that I have a "known good" motor so I can do baseline dynos on my dual-DISA manifold and then swap on the new one (and a different ECU) for a direct comparison.

We know that my motor pulled like crazy on the N54 manifold. I'm not sure we saw peak power... it was still building past 7500... we want most of that goodness with a civilized bottom-end.

My DISA mani runs out of breath at the track for sure.

Also, his body afforded room for the front-facing inlet. I want more M50-ish to make it broadly compatible (although a TB and MAF are basically optional on this motor....)