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Old 01-21-2010, 03:20 PM   #41
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with the 1.8L you can literally cut off the flange and weld a BP flange onto the runners; the port spacing is that close.
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Old 01-21-2010, 03:21 PM   #42
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Might be a month or so.
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Old 01-21-2010, 04:28 PM   #43
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I'd do it for 100 dollars.
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Old 01-21-2010, 04:39 PM   #44
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If I do it im probably going to do it with a stock honda mnifold, it doenst l;ook quite as good as a blox/skunk2/edelbrock or w/e but theyre still pretty damn good. plus i could pick one up locally for peanuts
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Old 01-21-2010, 04:44 PM   #45
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The OBX knock-off is $20 cheaper than the other knock-off:

OBX Intake Manifold 90-94-01 Integra GS LS RS B18B FMF2 - Integra Engine Performance
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Old 01-21-2010, 05:08 PM   #46
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Quote:
Originally Posted by dc2696 View Post
Marc, you really need to post a build thread about your old set-up, if you've already been there done that it would be nice to know how it went ect.
I've started to forget some of the stuff I did.
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Old 01-21-2010, 05:16 PM   #47
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This looks like it could get interesting
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Old 01-21-2010, 05:23 PM   #48
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I think thsi would be cool, and give a little soemthing to play with on the dyno:
Acura Integra GSR (B18C1) Intake manifold





It has secondary runners that are opened by a set of butterfly valves.
I think this manifold is the reason why so many ppl think that VICS works this way.
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Old 01-21-2010, 05:40 PM   #49
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I'd do it for 100 dollars.
$99 and I'll use real jb weld and a real sawzall.
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Old 01-21-2010, 05:42 PM   #50
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I thought you asked what the volume was...(notice I edited it after some scaling in AutoCAD), now => 1.82L

Compare that volume to the swept volume of the motor, and it's almost exactly 100%. Add in the volume of one of those 8" long runners and you're pretty close to the accepted ideal norm for turbocharged applications...150%. I had overlooked that you are supposed to use the plenum volume AND the volume of one runner for that rule of thumb.
I always thought you calculated the volume of the plenum without the volume of the runners? I know plenum and runners are both there own science and thought they where calculated separately I need to know because I'm drawing mine up right now and this would change things.
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Old 01-21-2010, 05:58 PM   #51
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I always thought you calculated the volume of the plenum without the volume of the runners? I know plenum and runners are both there own science and thought they where calculated separately I need to know because I'm drawing mine up right now and this would change things.
I always did too...but I found some engineering forum post earlier that said to include (1) runner...at least for the 150% engine displacement guideline.

This article doesn't mention it though:

http://www.amsperformance.com/pdfs/intakemani.pdf

Read second page, middle paragraph.

Even then, a nearly 2L intake manifold plenum is much better than what we've got. Anyone ever measure a stock 1.6L mani, or is that what I'm doing tonight?
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Old 01-21-2010, 06:56 PM   #52
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do it! get a bucket of water...

but seriously, if these things are working for boosted B16 and B18 motors dot dot dot ...


The stock IM has 16" long runners!
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Old 01-21-2010, 07:00 PM   #53
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do it! get a bucket of water...
The motor hustler sent me has an intake mani attached to it.

Will unbolt it tonight, but a bag in there and pour...seriously.

I'll be using the same said mani to hack up and put $100 Honda chinamani on.

300whp here I come...
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Old 01-21-2010, 09:43 PM   #54
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Quote:
Originally Posted by Braineack View Post
do it! get a bucket of water...

but seriously, if these things are working for boosted B16 and B18 motors dot dot dot ...


The stock IM has 16" long runners!
Yah the stocker does have long runners. Grr and just because it "works' doesn't mean it works well!
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Old 01-21-2010, 11:11 PM   #55
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Originally Posted by Braineack View Post
do it! get a bucket of water...

but seriously, if these things are working for boosted B16 and B18 motors dot dot dot ...


The stock IM has 16" long runners!
^^^This
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Old 01-21-2010, 11:40 PM   #56
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[QUOTE=gospeed81;511407]I always did too...but I found some engineering forum post earlier that said to include (1) runner...at least for the 150% engine displacement guideline.

This article doesn't mention it though:

http://www.amsperformance.com/pdfs/intakemani.pdf

Read second page, middle paragraph.

I couldn't find it but Ill dig out my notes on Saturday from my class on intake manifolds and see if its in my notes somewhere but I sewer the runners don't count for plenum volume in the calculation, however It has been about 5 years since I took that class.
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Old 01-22-2010, 06:54 AM   #57
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Quote:
Originally Posted by Gotpsi? View Post

I couldn't find it but Ill dig out my notes on Saturday from my class on intake manifolds and see if its in my notes somewhere but I sewer the runners don't count for plenum volume in the calculation, however It has been about 5 years since I took that class.
I would love you if you did that.

I don't take MEEN410 until next semester (Internal Combustion Engine Tech. Elective).

Take it with a grain of salt. It was on a technical forum I use for drafting pointers at work. I've never heard runner volume considered either.


I spoiled my wife last night and didn't go out to the garage...so I'll have to measure the stocker this weekend.
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Old 01-22-2010, 07:04 AM   #58
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I would have done it, but I just threw away the old plenum I cut off like two weeks ago.
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Old 01-22-2010, 10:35 AM   #59
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I am getting a stocker from wanecur any day now so I can do it then. Im not trying to argue about the volume I just want to build mine correctly and make sure everyone else gets the right information. There is already some good information on this tread for some one looking to build there own manifold maybe it should be a sticky? Anyways I will be out in the garage tomorrow and will dig up my notes and post them up.
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Old 01-22-2010, 10:38 AM   #60
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Me too...I mainly want to know how the stocker compares to my estimate on the Skunk2...a measure of possible improvment.
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