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Old 03-11-2016, 11:19 AM   #961
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Quote:
Originally Posted by aidandj View Post
So VICS was better everywhere?
No, VICS was better from 3500-6500.
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Old 03-11-2016, 11:20 AM   #962
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Was that with VICS tuned? Or just on the OEM switch.
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Old 03-11-2016, 11:23 AM   #963
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Originally Posted by aidandj View Post
Was that with VICS tuned? Or just on the OEM switch.
OE switch. You can see a little bump where it happened.
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Old 03-11-2016, 12:07 PM   #964
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Quote:
Originally Posted by vteckiller2000 View Post
Results, Skunk2 Ultra B series intake manifold with miata specific Skunk2 64mm throttle body.
Car has BP5A engine swap with 35k miles, full exhaust and +4 degrees timing with a trigger wheel. BP5A ecu.

Red is VICS manifold, blue is honda manifold.
Any peak values? VICS manifold wins the area under the curve battle and is what I would race on. Likely further small gains with multiple and tuned VICS crossovers points.

Like I have stated earlier, based on testing and observations here, the shorter runners pay off with cams that have enough duration to move torque and power peaks up 1000~1500rpm. Stock-ish cams I still believe OEM runner lengths give the best area.

Our best ever area with a square top, 182whp was with stock NB2 cams on 11.0:1 2.0L with everything coated on pump gas. We never raced in this config as it was over our power cap. A CNC +2 head would have brought that to about 192whp I think. We have an engine going together now that should get close to 185whp on pump gas with a squaretop.

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Honda intake manifold-80-crusher_2012_stg2integral_2l_gas_ffc775a0b616a44ae76b19670439e229820b2833.gif  
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Old 03-11-2016, 12:10 PM   #965
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Originally Posted by emilio700 View Post
Any peak values? VICS manifold wins the area under the curve battle and is what I would race on. Likely further small gains with multiple and tuned VICS crossovers points.

Like I have stated earlier, based on testing and observations here, the shorter runners pay off with cams that have enough duration to move torque and power peaks up 1000~1500rpm. Stock-ish cams I still believe OEM runner lengths give the best area.
Peak values were IIRC: 118/95 with honda intake manifold and 116/100 with VICS manifold.

We are trying to figure out how this car's sister with an identical setup save for added timing and 5A cam is making 10-15 more torque everywhere and 10-12 more peak hp than me.
With a bigger cam and more timing, this car should make more than the other car, but it is the opposite.
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Old 03-14-2016, 06:55 PM   #966
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pretty sure the VICS manifold has the longest runners of any of the NB versions. it appears the runner length extends further into the top half of the manifold than either the VTCS manifold or the flat top. It might be approaching the Protégé VICS BP manifold length that made 12hp and 8 ft-lbs over the same motor specs in a NA Miata.
Seems like those long runners are making mid range area under the curve.
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Old 07-05-2016, 11:00 PM   #967
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Random postmortem update on my redrilled Blox skunk2 copy:
all four runners had cracked at the flange. Two flange nubs broke off completely. The top middle stud was broken, no lower studs broke.

Motor was a balanced/forged bottom end with a 949 damper/BE pump, 1 Mazdacomp mount, 1 OE mount, unsprung 3 puck SPEC clutch.





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Honda intake manifold-5ccb048a-6f25-44d6-bb61-7cf5de7d5902_zpsgseisezj.jpg   Honda intake manifold-d9c7d7c8-5a62-4c3f-b96e-50c39a663074_zpsqmkinahx.jpg   Honda intake manifold-e8fb9b86-57b1-4a49-a2a0-008c0a9576f3_zpssf8oqlhy.jpg  
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Old 07-06-2016, 12:28 AM   #968
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"Motor was"? Did it eat some intake?
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Old 07-06-2016, 12:45 AM   #969
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Quote:
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1 Mazdacomp mount, 1 OE mount
Did you mean 1 AWR mount and 1 mazda comp mount? Or actually 2 of the rubber sandwich mounts.
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Old 07-06-2016, 12:52 AM   #970
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Quote:
Originally Posted by doward View Post
Motor was a balanced/forged bottom end with a 949 damper/BE pump, 1 Mazdacomp mount, 1 OE mount, unsprung 3 puck SPEC clutch.
ouch. and many think that balanced rotating assembly will stop the crazy BP vibration
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Old 07-06-2016, 07:54 AM   #971
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This makes me reconsider stiffer mounts, or to re-add the support for squaretop
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Old 07-06-2016, 08:48 AM   #972
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That's a knockoff ebay manifold, designed for a different engine.
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Old 07-06-2016, 09:49 AM   #973
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also long runner with the plenum far set which will induce a larger moment about the flange.
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Old 07-06-2016, 11:29 AM   #974
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Quote:
Originally Posted by aidandj View Post
That's a knockoff ebay manifold, designed for a different engine.
I'm trying to see your point. What is it?
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Old 07-06-2016, 11:30 AM   #975
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That plenty of people have run BP's to high RPMs with stiff mounts and haven't broken intake manifolds.

I don't believe psyber should reconsider stiff engine mounts because someone running a knockoff honda manifold broke theirs. Apples to Oranges.
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Old 07-06-2016, 11:31 AM   #976
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There are a LOT of people that cracked custom or fabricated manifolds. Like, WAY more than I'd be comfortable seeing if I was considering a custom IM.
Maybe apples to oranges, but I'm still most comfy with the way the flattop is actually designed to work with the BP and would take every precaution if running a custom setup.
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Old 07-06-2016, 11:32 AM   #977
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But he has a stock flat top.
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Old 07-06-2016, 11:33 AM   #978
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oh well then he's fine. make sure to use the brace, don't throw it away like some people.
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Old 07-06-2016, 11:33 AM   #979
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it's so flat.

I never had a brace since I came from 1.6L land :(
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Old 07-06-2016, 11:34 AM   #980
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I'll see if I have a spare
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