Interesting Intake Manifold Design - Page 13 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Insert BS here A place to discuss anything you want

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 11-30-2009, 10:10 PM   #241
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Quote:
Originally Posted by cueball1 View Post
I really want to see BMC come through on a nice affordable turbo IM. I'm hesitant to bash them because of this. I'm not sure how well he takes the jibes and ribbing he gets here. That said...

Mod that Civic one to fit ours already! It took 6 months to get the honda one finalized. We're five months on this thread now. How far behind are we?
+1

The B series honda has nearly the same port spacing as the BP, all it would take is a different flange and a little tweaking
Full_Tilt_Boogie is offline   Reply With Quote
Old 11-30-2009, 10:18 PM   #242
Senior Member
iTrader: (5)
 
Join Date: Apr 2008
Location: VA
Posts: 828
Total Cats: -2
Default

Quote:
Originally Posted by Full_Tilt_Boogie View Post
Id like to do this as well, I dont think its a bad idea especially when the throttles can get picked up pretty cheap
Would it not provide a more even charge to each cylinder? The inside of the IM would be at a given pressure and when the butterflies open up you get the same volume of flow, right?
thymer is offline   Reply With Quote
Old 11-30-2009, 10:23 PM   #243
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Quote:
Originally Posted by thymer View Post
Would it not provide a more even charge to each cylinder? The inside of the IM would be at a given pressure and when the butterflies open up you get the same volume of flow, right?
I imagine that it would during throttle transitions, there would still have to be lots of care put into the plenum design just as with a single TB manifold, because once at WOT its not going to be any more even than normal runners
Full_Tilt_Boogie is offline   Reply With Quote
Old 11-30-2009, 11:54 PM   #244
Junior Member
iTrader: (4)
 
Join Date: Dec 2007
Location: Chattanooga, TN
Posts: 187
Total Cats: -1
Default

Quote:
+1

The B series honda has nearly the same port spacing as the BP, all it would take is a different flange and a little tweaking
Please do this for a reasonable price. Our stock intakes are choking us... We could all benefit from this
flipt86 is offline   Reply With Quote
Old 12-01-2009, 11:33 AM   #245
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default

Well Sam is finally working on Miata stuff today.

He has the 1.6L Head flange about 3/4 machined already, he just needs to turn it on angle and do the injectors and it is done.

He is right now working on the plenum plate design as well as the throttlebody and getting the sides of the plenum designed out. He is working it out so that you have the choice of (factory miata throttlebody, honda 76mm throttlebody, or ford 90mm throttlebody).

I told him you guys are really on a budget so we won't be able to produce our own fuel rail instead we will have to have the manifold except your factory type fuel rails so as to keep our costs down. To be honest though the manifold is still going to run around the $700 mark as the costs to have everything machined out is just so high...

We are designing this manifold so that it will fit within the space constraints of the factory manifold, also the throttlebody will be angled just the same so that it should be a direct bolt in, rather than having to modify charge piping.

-James
BMCRace is offline   Reply With Quote
Old 12-01-2009, 11:51 AM   #246
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default

Just ordered the material for doing the runners. Hopefully I can have something finished pretty soon for you guys!
BMCRace is offline   Reply With Quote
Old 12-02-2009, 01:19 AM   #247
MT Pony Underground
iTrader: (6)
 
Nagase's Avatar
 
Join Date: May 2009
Posts: 1,811
Total Cats: 0
Default

In for air flow modling data (especially air distribution to each cylinder), and dyno results!
Nagase is offline   Reply With Quote
Old 12-02-2009, 02:00 PM   #248
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default
















There is some recent work done on the Miata 1.6L intake manifold.

Will post more pictures as we make more progress.
-James
BMCRace is offline   Reply With Quote
Old 12-02-2009, 06:06 PM   #249
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Meriden, CT
Posts: 2,072
Total Cats: 1
Default

Awsome! Glad to see progress
Cspence is offline   Reply With Quote
Old 12-02-2009, 06:44 PM   #250
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default

A bit more progress.

I will not weld this plenum solid until the material comes in for the runners. I have to maintain my ability to port match the runners to the base plate incase of any minor imperfections. Also I don't want to finish it off and someone want a different throttlebody than the factory one posted here.

Your throttlebody options upon ordering will be:
Miata 1.6L factory throttlebody
Miata 1.8L factory throttlebody
Honda 76mm throttlebody
Ford 90mm throttlebody

The runners are 2" od 11 gauge (.120 wall thickness) we port match your factory port to the size of the large runner, this does good for anyone who might have a highly ported head so now you have the flow of a larger runner at your willingness to port out your new intake manifold

Unfortunately Sam has to stop working on stuff for me for about a week as he works on more vises (those guys love those little things lol) but as soon as he is ready to pop the head flange in the machine and do the final operation (turn flange on angle and machine in injector bosses) I will be sure to let everyone know.

Now is the time for anyone in the Texas to start to contact me as I will need to do the dyno work and see how these things do, (unless any shop owners on here is willing to help us out)

-James








This is why I prefer everything to be fully machined, the fitment is perfection ^^


Here is a nice reminder of what the inside of your factory plenum looks like ^ ^ \/ \/
BMCRace is offline   Reply With Quote
Old 12-02-2009, 07:14 PM   #251
Senior Member
iTrader: (2)
 
Join Date: Oct 2007
Location: Northeastern CT
Posts: 547
Total Cats: 2
Default

IMO a ford 4.6 throttle body would be best, they are big, cheap, and easy to come by. they also have a standard 0-5v tps, and you can get them with a built in idle valve depending on the source vehicle.
therieldeal is offline   Reply With Quote
Old 12-02-2009, 07:26 PM   #252
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default

Can you give us an accurate measurement for the throttlebody bore (manifold side)
We already have the bolt pattern so all we would have to do is resize the whole and then that could be optional as well.
BMCRace is offline   Reply With Quote
Old 12-02-2009, 07:46 PM   #253
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default

Almost forgot, here is the head flange in the works





-James
BMCRace is offline   Reply With Quote
Old 12-02-2009, 08:09 PM   #254
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

I like what I am seeing, haha
Full_Tilt_Boogie is offline   Reply With Quote
Old 12-02-2009, 09:50 PM   #255
Elite Member
iTrader: (10)
 
leatherface24's Avatar
 
Join Date: Dec 2006
Location: Pembroke Pines
Posts: 4,033
Total Cats: 2
Default

Im a little forgetful. You already made one if these for the 1.8
leatherface24 is offline   Reply With Quote
Old 12-02-2009, 10:29 PM   #256
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default

It was a quick little itb setup I did for the 1.8

If anyone is interested in a 1.8 intake manifold we already have the head flange instock so I could build one very quickly.

Pricing is $700 shipped to anywhere in the USA
BMCRace is offline   Reply With Quote
Old 12-02-2009, 10:30 PM   #257
MT Pony Underground
iTrader: (6)
 
Nagase's Avatar
 
Join Date: May 2009
Posts: 1,811
Total Cats: 0
Default

How much would it take to make an enclosure for the ITB setup? (to let it be used on turbo cars, and therefore keep it relivant to most people here)
Nagase is offline   Reply With Quote
Old 12-02-2009, 10:33 PM   #258
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default

I am worried there wouldn't be enough room to build the plenum/enclosure you are wishing for as the itbs already come pretty far off the head.
BMCRace is offline   Reply With Quote
Old 12-02-2009, 10:58 PM   #259
MT Pony Underground
iTrader: (6)
 
Nagase's Avatar
 
Join Date: May 2009
Posts: 1,811
Total Cats: 0
Default

If the ITBs were properly spaced out, couldn't you weld them directly to that flange and save like 5"?
Nagase is offline   Reply With Quote
Old 12-02-2009, 11:07 PM   #260
Junior Member
 
Join Date: Jul 2009
Posts: 89
Total Cats: 0
Default

Yes that could be done.

I have heard the 4age toyota has a set of itbs that are not interconnected so you can place them wherever you want. Also they should be much larger in size and therefore flow more air = more power.
BMCRace is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:32 AM.