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Old 06-17-2016, 12:13 AM   #401
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Getting closer.



together
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Old 06-18-2016, 12:37 PM   #402
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yea I push 2.5 hose on a 2.7XX OD Skunk2 TB without too much difficulty. I like the tight fit and without boost it won't need hose clamps at all.
I dont know about the no clamps though. Vibration will get it off imo.
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Old 06-27-2016, 12:56 PM   #403
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I sent this helmholtz resonated crossover and the new airfilter setup out to the PNW to get dyno tested.


The helmholtz chamber showed a conclusive improvement in the targeted RPM range. There is quite a bit of per run variation in the dyno results. If you take the two closest a/b runs its about a 5 wtq difference- the two farthest and its a 10 wtq improvement. I'm going to call the result "between 5 and 10 wtq."

A chart- Two with the chamber, two without:


I'm going to make production versions with a male mold I can lay up twice, and bond the halves together. Since its a male tool, the flanges can be kept on the carbon part without altering the internal shape.


Surprisingly the silicone reducer/bellmouth/larger filter part didn't show conclusive improvements. If you sort the results of all 12 dyno runs, there is a trend of the new filter results being at the top, but there is no definitive conclusion from comparing any two runs. I would guess the part is providing minimal (1whp) benefit, which is less than the per run variation, but is responsible for that sorting trend. I might try and force a large bell mouth radius on the side where I have room and see if that helps.
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Old 06-27-2016, 03:27 PM   #404
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someone owes you something...



good job alec
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Old 06-27-2016, 04:27 PM   #405
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Your prototype was in good hands.


DSC_0021 by stormin'norman3, on Flickr
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Old 06-27-2016, 11:21 PM   #406
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Are these for sale yet?
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Old 06-29-2016, 11:06 PM   #407
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Dam now I got to make a helmholtz out of aluminum
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Old 06-30-2016, 10:03 AM   #408
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I will have a supply helmholtz crossovers pretty soon. I don't have to do any significant work to get the molds going and I can have my brother in law churn them out while I am busy with my day job. The intake ducts require a lot more cad work, followed by machining, then making bladders... So they are going a lot slower.

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Old 06-30-2016, 01:50 PM   #409
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How is the fitment behind the radiator? Have you considered selling them via some of the vendors like FM and 949racing?
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Old 06-30-2016, 02:09 PM   #410
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The helmholtz chambers require a coolant reroute to fit. I'm not sure how well it would fit with something like the massive TSE radiator. Maybe Nial can measure clearance on either side + the thickness of his RAD to give an idea.

I don't have one installed on my car since I don't have my new engine with coolant reroute in yet.
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Old 06-30-2016, 02:13 PM   #411
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You can put one on my car in a few weeks.
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Old 06-30-2016, 02:16 PM   #412
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Also,
Do people want a helmholtz effect at another RPM? I want to make a few more test parts just to see what happens when you size a Helmholtz for 5k or 7k. I'm also wondering what happens when you put multiple resonators in line. I assume you get some kind of negative wave interactions.
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Old 06-30-2016, 02:20 PM   #413
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someone owes you something...



good job alec

LOL no ten dollars for those shitty graphs. Seriously what is up with that? After my car is warmed up I can lay a bunch of lines right on top of each other.
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Old 07-01-2016, 04:58 PM   #414
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Quote:
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The helmholtz chambers require a coolant reroute to fit. I'm not sure how well it would fit with something like the massive TSE radiator. Maybe Nial can measure clearance on either side + the thickness of his RAD to give an idea.

I don't have one installed on my car since I don't have my new engine with coolant reroute in yet.
Sure, I can try to measure this evening. There wasn't a ton of room with the 37mm Koyo Hypercore. May be problematic with 55's and larger.
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Old 07-01-2016, 05:03 PM   #415
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someone owes you something...



good job alec
Shouldn't that be a 3 dollar bill?
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Old 07-23-2016, 07:14 PM   #416
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asmasm, please don't make me buy a K&N for my VVT swap! I'm in for a copy of your latest intake design if you're up for it.

It was mentioned a couple pages back...since ABS was not offered in 1990, the theory about the ABS washer bottle makes sense. My 11,xxx VIN `90 doesn't have the hole either. Passenger side hole appears to be access to A/C receiver/drier sight glass.
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Old 08-15-2016, 01:16 PM   #417
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Almost a month since the last post, any updates?
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Old 08-15-2016, 01:48 PM   #418
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Almost a month since the last post, any updates?
I PM'd and emailed him a couple weeks ago, no dice. Maybe on vacation or something?
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Old 08-15-2016, 01:55 PM   #419
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He has become obsessed with sim racing. He doesn't leave the house anymore.
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Old 08-15-2016, 03:01 PM   #420
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Ive been on a waiting list for months and months for the carbon version.. Though, I dont foresee it coming soon at this rate. Has anyone recently had good success/experience with a particular printer/person/method? (besides whats already been documented here)
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