Gutting upper vics manifold - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 02-20-2012, 03:46 AM   #1
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default Gutting upper vics manifold

So i've been searching a lot on gutting the upper part of my vics manifold.

The plan is to remove the vics chamber on the upper manifold and leave the bottom one alone... leave the butterflys in tact and control them with my standalone.

So far i've seen people gut the bottom and completely remove the butterflys but no results in cutting the upper shelf. I see that pat is running with the top gutted but i havent seen any results. Any one else running with the top gutted and the butterflys still in tact?


If so at what rpm do you guys have them set to open?
Whats to be expected after gutting the top?
What method/tools did you guys use to cut the shelf?
triple88a is offline   Reply With Quote
Old 02-20-2012, 09:25 PM   #2
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

So, today i went at it, got it done.
I feared the injectors wont do so i installed my 800cc injectors. Went in boost and afr went in the mid 10s... I removed some fuel but didnt test it, after restart the bloody wideband is fouled and is all over the place so i couldnt test anything. I guess i'll have to get a new one.
triple88a is offline   Reply With Quote
Old 02-20-2012, 09:33 PM   #3
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

Do you have photos of your work? I am very I interested in more details.
thirdgen is offline   Reply With Quote
Old 02-20-2012, 09:41 PM   #4
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

i have a rough photo right after i pulled the center piece, I don't have the required tools to clean it up all the way too the wall so i had to round it off and leave it sticking out a little bit. I'll upload it in a sec.
triple88a is offline   Reply With Quote
Old 02-20-2012, 09:49 PM   #5
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Damn pic is dark but you can see i used a drill bit to get rid of the center piece and then used grinding wheels for my hand drill to make whats left of the shelf smaller. Dont have a good pic of the finished manifold.

Attached Thumbnails
Gutting upper vics manifold-p200212_1416.jpg  
triple88a is offline   Reply With Quote
Old 02-20-2012, 09:53 PM   #6
Senior Member
iTrader: (1)
 
Join Date: Jan 2011
Location: Chattanooga, Tn
Posts: 1,038
Total Cats: 157
Default

Holy Crap. Go to Harbor Freight and spend the $20 for a rotary tool.
TNTUBA is offline   Reply With Quote
Old 02-20-2012, 09:59 PM   #7
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

So what your basically saying is, if I had a machinist actually remove that stuff and polish the inside of the intake; it would work pretty awesome.
thirdgen is offline   Reply With Quote
Old 02-20-2012, 10:07 PM   #8
Junior Member
 
Join Date: Jan 2011
Location: sacramento ,ca
Posts: 402
Total Cats: 46
Default

that must have taken forever... i used a hammer and chisel to bust a hole and used a sawz all to make the long cuts. i did end up using a carbide cutter on a power drill for the smoothing though. youre lucky... the miata vics looks much smaller than the protege vics i cut up...

were you planning on removing the 4 rings left on the top and hollowing out the lower section?

before

after


before

after
Attached Thumbnails
Gutting upper vics manifold-0125185357.jpg   Gutting upper vics manifold-0125185038.jpg   Gutting upper vics manifold-168094_163313713715651_100001110701016_327652_5643195_n.jpg   Gutting upper vics manifold-0121193728.jpg   Gutting upper vics manifold-0125185357.jpg  


Last edited by fastivab6tg25mr; 02-20-2012 at 10:18 PM.
fastivab6tg25mr is offline   Reply With Quote
Old 02-20-2012, 11:03 PM   #9
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Quote:
Originally Posted by TNTUBA View Post
Holy Crap. Go to Harbor Freight and spend the $20 for a rotary tool.
I used a dremmel but it didn't work too well and my rotary saw was too big. Long story short, i should have had an endmill or something similar.

Festiva, i do not plan on cutting anything on the lower manifold. My vics butterflys are still in tact and are set to open at 5k rpm. Sadly cant try it out since that damn sensor...
triple88a is offline   Reply With Quote
Old 02-20-2012, 11:38 PM   #10
Newb
 
Join Date: Feb 2012
Location: Houston
Posts: 40
Total Cats: -8
Default

Im doing one of these right now for my buddies car who has an S4 Begi kit. We shall see numbers before and after.
Bagel is offline   Reply With Quote
Old 02-21-2012, 12:16 AM   #11
Elite Member
iTrader: (24)
 
Join Date: Jul 2007
Location: Cypress, TX
Posts: 3,778
Total Cats: 35
Default

Quote:
Originally Posted by Bagel View Post
Im doing one of these right now for my buddies car who has an S4 Begi kit. We shall see numbers before and after.
In for numbers. Must be Matt's car eh?
Bryce is offline   Reply With Quote
Old 02-21-2012, 12:19 AM   #12
Newb
 
Join Date: Feb 2012
Location: Houston
Posts: 40
Total Cats: -8
Default

Quote:
Originally Posted by Bryce View Post
In for numbers. Must be Matt's car eh?
Correct, Then im taking his off and doing the same thing for my car, Plus Polydyn!
Bagel is offline   Reply With Quote
Old 02-21-2012, 02:44 AM   #13
Junior Member
 
Join Date: Jan 2011
Location: sacramento ,ca
Posts: 402
Total Cats: 46
Default

will the butterflies effect anything with that upper chamber hollowed out? i ask cause the runners look like they would be so close to the same size it doesnt look like there would be much gain in actuating the flappers. at least thats what im seeing by this pic. id love to see some numbers.

Attached Thumbnails
Gutting upper vics manifold-99intakemanifold.jpg  
fastivab6tg25mr is offline   Reply With Quote
Old 02-21-2012, 02:52 AM   #14
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

When the butterflies are closed, its just like it was before however now that space contributes to a bigger plenum, with the butterflies open, it gives you a shorter runner for the higher rpms.
triple88a is offline   Reply With Quote
Old 02-22-2012, 06:24 PM   #15
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Alrighty my new wideband is in, i shall do few pulls later. Old sensor looks...black so i'm guessing its salvageable.
triple88a is offline   Reply With Quote
Old 02-22-2012, 06:36 PM   #16
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Alrighty my new wideband is in, i shall do few pulls later. Old sensor looks...black so i'm guessing its salvageable if i can find a propane tank to burn off the carbon build up. Anyone ever cut one of these sensors apart?
triple88a is offline   Reply With Quote
Old 02-22-2012, 10:32 PM   #17
Elite Member
Thread Starter
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Alright well somethings fucked up.

blues open
reds closed
3rd gear pull

Attached Thumbnails
Gutting upper vics manifold-blueopen.jpg  
triple88a is offline   Reply With Quote
Old 02-29-2012, 07:07 PM   #18
Junior Member
 
Join Date: Jan 2012
Location: Magnolia,TX
Posts: 87
Total Cats: -1
Default

??
Moffitt is offline   Reply With Quote
Old 03-10-2012, 12:30 PM   #19
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

What happened? It looks like you made a significant amount of more torque at lower RPM's, unless I'm not seeing this correctly.
I ask because I have my spare intake apart in my garage and I am looking to gut this thing, only if there is a proven benefit.
What RPM does your actuator open? Please explain how you did your pulls...was it completed closed for one pull and completely open for another?
thirdgen is offline   Reply With Quote
Old 03-10-2012, 12:37 PM   #20
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by triple88a View Post
Alright well somethings fucked up.

blues open
reds closed
3rd gear pull

Too much RPM data.
hustler 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 58 Yesterday 10:04 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
ISO 1.6 turbo cast iron manifold cale saurage DIY Turbo Discussion 16 10-01-2015 12:25 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 06:22 AM.