Honda intake manifold
06-03-2013, 10:43 AM
#721
See if any of your local metal suppliers list their drops on their website. If not you'll have to call them and ask them about their drops. I loved getting 5 pieces of 2.5" 6061 tube for practically nothing, they were 47 7/8" I'm assuming someone ordered some pieces pre-cut to 48" and they fucked up cutting them.
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06-03-2013, 11:24 AM
#723
They always seem to have something I need in their ohio warehouse. And have an $80 minimum for shipped orders so I have so much random metal that I "may need for something" that normally only costs 5 or 10 bucks to get the the minimum just sitting in a corner in my apartment.
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06-05-2013, 10:34 PM
#724
let's see how long mine will last.. 
above:
there's a V -shaped support plate on top of the every runner
below:
Support plates/ribs there also. (don't mind the burned spots. my desk caught fire during pre-heating)
This is the last time I’m going to repair that ****. If it broke one more time I’m going back to the OEM flat-top
above:
there's a V -shaped support plate on top of the every runner
below:
Support plates/ribs there also. (don't mind the burned spots. my desk caught fire during pre-heating)
This is the last time I’m going to repair that ****. If it broke one more time I’m going back to the OEM flat-top
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08-22-2013, 09:52 AM
#730
Beautiful work for sure!
My question is about the ports.....when I did this the ports on the manifold were MUCH larger than those on the flange and the transition is rather obvious. I don't see where your runners taper and I wonder if the ports on the head will match those on the manifold or will there be an abrupt transition there? I plan to do another one of these by modifying the flange and not welding a mazda flange on it hopes of a stronger design.
Either way, you do great work!
My question is about the ports.....when I did this the ports on the manifold were MUCH larger than those on the flange and the transition is rather obvious. I don't see where your runners taper and I wonder if the ports on the head will match those on the manifold or will there be an abrupt transition there? I plan to do another one of these by modifying the flange and not welding a mazda flange on it hopes of a stronger design.
Either way, you do great work!
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08-22-2013, 10:08 AM
#734
Thanks. I've already been thinking about a bracing solution. Have a friend with a welder(s), we'll have to see what we can come up with.
Before the porting/smoothing work was done it looked pretty rough. The flange ports and runners line up pretty close, and are close to the same size, but yeah it was not perfect. My manifold was cut right at the flange, a tiny, tiny bit "higher' of a cut may work a little better. At the end of the day, good porting/blending work with the die grinder will make it work. The 2 outer ports don't line as quite as well and aren't quite as nice as the single pic I posted above, but it still has a decently smooth transition, etc.
Before the porting/smoothing work was done it looked pretty rough. The flange ports and runners line up pretty close, and are close to the same size, but yeah it was not perfect. My manifold was cut right at the flange, a tiny, tiny bit "higher' of a cut may work a little better. At the end of the day, good porting/blending work with the die grinder will make it work. The 2 outer ports don't line as quite as well and aren't quite as nice as the single pic I posted above, but it still has a decently smooth transition, etc.
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08-22-2013, 12:41 PM
#738
We have a #4771 Edelbrock Performer-X at the fabricator being put together this week. For an N/A engine with stock or mild race cams, we want the runners just a shade under 11" long. Most aftermarket Honda B series manifold are based on the Type R B18C with shorter runners. The Performer is a bit longer and smaller volume runner so it's closer to our target. A friend did some controlled testing of various runner lengths on a supercharged BP4W head and found best power at around 10.5" runner length. Not sure how that applies to turbos but I have a feeling they'll respond best to the same runner lengths. This all assumes stock (3000-7200) or slightly higher powerband with cams/porting (4000-8200).
The obstacle in our case is making it fit with the NB's ABS pump in the OEM location with those longer runners. So we're making a new bracket for the ABS pump and shoving it over a few inches. If it fits and makes any power, I'll post pics.
The obstacle in our case is making it fit with the NB's ABS pump in the OEM location with those longer runners. So we're making a new bracket for the ABS pump and shoving it over a few inches. If it fits and makes any power, I'll post pics.
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08-23-2013, 05:22 PM
#740
1-2 heim joints, either two from below or one from above and another from below should stabilize it. Aaron, let us know how your intake fares; I'd love to see regular manifold vs your new intake if you get a chance.
Is there a larger TBody that has an IAC valve similar to OEM? For those of us considering this for our DD cars.. I don't want a terrible idle.
Is there a larger TBody that has an IAC valve similar to OEM? For those of us considering this for our DD cars.. I don't want a terrible idle.
Last edited by Der_Idiot; 08-23-2013 at 05:36 PM.
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