ITBS + plenum + turbo = worthwhile gain? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 02-05-2009, 07:34 AM   #21
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Lexington, SC
Posts: 2,084
Total Cats: 0
Default

My Home Page

I find myself posting this site yet again

(not my homepage btw)
mazda/nissan is offline   Reply With Quote
Old 02-05-2009, 11:19 AM   #22
Senior Member
iTrader: (7)
 
nicacus's Avatar
 
Join Date: Jul 2006
Location: SLC UT
Posts: 1,133
Total Cats: 0
Default

Quote:
Originally Posted by akaryrye View Post
4 tiny turbos would take just as long as one turbo 4 times as big ... well actually i think it would be worse due to the way the exhaust pulses would be hitting the turbines. Think about it, instead of 1800cc to power a turbo, now for each you have 450cc.


whatever, you were just joking anyway, and i ruined it lol.
Dude if the Veyron can do it a Miata can do it better
nicacus is offline   Reply With Quote
Old 02-05-2009, 01:34 PM   #23
N3v
Junior Member
Thread Starter
 
Join Date: May 2008
Location: Nashville/Knoxville, TN
Posts: 318
Total Cats: 1
Default

i was thinking about doing twin turbos just for the awesome factor, where each one is on it's own system and is fed into two ITB runners. seems expensive, and twice as many points of failure. But it sure would be one engine bay packed to the gills with awesome.
N3v is offline   Reply With Quote
Old 02-05-2009, 01:38 PM   #24
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,899
Total Cats: 1,792
Default

just dont forget a balance tube.
Braineack is offline   Reply With Quote
Old 02-05-2009, 03:07 PM   #25
Hear me Meow
iTrader: (3)
 
skidude's Avatar
 
Join Date: Apr 2008
Location: Outside Portland Maine
Posts: 1,994
Total Cats: 13
Default

Quote:
Originally Posted by N3v View Post
i was thinking about doing twin turbos just for the awesome factor, where each one is on it's own system and is fed into two ITB runners. seems expensive, and twice as many points of failure. But it sure would be one engine bay packed to the gills with awesome.
What about a cross? the turbo hooked to cylinders 1,2 feed 3,4 and the turbo running off 3,4 feed 1,2... No idea if there would be any benefit, but it might add to the cool factor.
skidude is offline   Reply With Quote
Old 02-05-2009, 05:07 PM   #26
Senior Member
iTrader: (5)
 
Join Date: Nov 2007
Location: Troy, MI
Posts: 860
Total Cats: 13
Default

Tune the spark and fuel maps using a Mustang 5.0 MAF sensor. The calibration values are already available in megasquirt. I am unsure of how you would do boost control and other MAP based functions without a MAP sensor though.
The_Pipefather is offline   Reply With Quote
Old 02-05-2009, 05:35 PM   #27
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Quote:
Originally Posted by The_Pipefather View Post
Tune the spark and fuel maps using a Mustang 5.0 MAF sensor. The calibration values are already available in megasquirt. I am unsure of how you would do boost control and other MAP based functions without a MAP sensor though.
Hybrid Alpha N?

Isnt that what its for?
Saml01 is offline   Reply With Quote
Old 02-05-2009, 05:41 PM   #28
Elite Member
iTrader: (7)
 
Join Date: Jan 2008
Location: Knoxville, TN
Posts: 2,121
Total Cats: 44
Default

I didnt know u were planning to run a turbo itb setup or was this a recent thought?

ill be there whenever i can to snap pics! actually need to post up the pics i havd of ur setup when i get home.
flier129 is offline   Reply With Quote
Old 02-05-2009, 05:42 PM   #29
Senior Member
iTrader: (5)
 
Join Date: Nov 2007
Location: Troy, MI
Posts: 860
Total Cats: 13
Default

Quote:
Originally Posted by Saml01 View Post
Hybrid Alpha N?

Isnt that what its for?
MAF is a way more elegant and reliable way of doing it. You have a single air inlet on a turbo car anyway, might as well use it to measure airflow directly.

BTW not a single OEM uses speed-density these days.
The_Pipefather is offline   Reply With Quote
Old 02-05-2009, 06:28 PM   #30
N3v
Junior Member
Thread Starter
 
Join Date: May 2008
Location: Nashville/Knoxville, TN
Posts: 318
Total Cats: 1
Default

Quote:
Originally Posted by flier129 View Post
I didnt know u were planning to run a turbo itb setup or was this a recent thought?

ill be there whenever i can to snap pics! actually need to post up the pics i havd of ur setup when i get home.
I'm always playing around with ideas. last week I was thinking high compression and nitrous, which would work and get me all the power i'd want on the street, then well into turbo power on the track, but turbos are just really damn fun, and an itb turbo setup would be monstrous. I don't have anything here at school besides my car and its current setup. I need to gather parts for my engine build though, cause I'm getting paranoid about the condition of my current ****. I need a job like yesterday.

I'm gonna toy around with the idea of using a mustang 5.0 MAF in my setup, it would instantly make tuning a snap. I don't really trust my current IAT sensor anyway, which is installed into the #1 runner, literally an inch and a half from the engine head.
N3v is offline   Reply With Quote
Old 02-05-2009, 07:03 PM   #31
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,899
Total Cats: 1,792
Default

Quote:
Originally Posted by skidude108 View Post
What about a cross? the turbo hooked to cylinders 1,2 feed 3,4 and the turbo running off 3,4 feed 1,2... No idea if there would be any benefit, but it might add to the cool factor.

I just worry about unequal pressure, so a balance tube for the tow manifolds would make sure all cylinders see the same amount of boost. it's common in TT v6 and v8 setups.
Braineack is offline   Reply With Quote
Old 02-05-2009, 08:52 PM   #32
Junior Member
 
Join Date: Aug 2005
Location: So Cal
Posts: 125
Total Cats: 0
Default

idle would suffer with hybrid alpha n. off boost would be in alpha n while on boost would be in speed density.
ideally, i would like to tune idle in speed density, above 85 kpa in alpha n (which is how i have my itb setup) and boost in speed density. it doesnt seem doable that way. so, maf might be the best option with "boost sensing" for timing retard during boost.
RdSnake is offline   Reply With Quote
Old 02-05-2009, 10:20 PM   #33
Senior Member
iTrader: (14)
 
Join Date: Jan 2007
Location: Murfreesboro,TN
Posts: 1,279
Total Cats: 53
Default

Quote:
Originally Posted by Miatamaniac92 View Post
Can be done successfully, search JeremyS on the pointy board.
His homepage

His top speed run, I don't know what he was running at the time though.
MX-5 Miata Forum - View Single Post - Fastest Miata?

ITB's are on my long term projects list.


Chris
I talked with Jeremy about his setup sometime ago and he basically told me the complexity of the system wasn't worth the gains. All in all a well designed single TB setup would do just as well. Plus with a turbo, you really don't hear the ITB's.
Midtenn is offline   Reply With Quote
Old 02-06-2009, 04:59 PM   #34
N3v
Junior Member
Thread Starter
 
Join Date: May 2008
Location: Nashville/Knoxville, TN
Posts: 318
Total Cats: 1
Default

well, i don't really care, I already have the ITB's. I'll just do it for the cool factor. It might flow better because the pressure is being regulated right at the runners, and it might also have better response. I really don't know though. What is certain though, is that it'd be beastly. As long as it performs as well as an aftermarket manifold I'll be happy.
N3v is offline   Reply With Quote
Old 02-06-2009, 05:13 PM   #35
Newb
iTrader: (1)
 
Join Date: Dec 2004
Location: Tampa
Posts: 27
Total Cats: 0
Default

If you try the setup, please let us know how it comes along.
93mimi is offline   Reply With Quote
Old 02-06-2009, 05:26 PM   #36
Senior Member
iTrader: (5)
 
Join Date: Nov 2007
Location: Troy, MI
Posts: 860
Total Cats: 13
Default

Don't be too disappointed if you find less gains than say, bumping the boost up by 2 psi, which is a lot easier to do.
The_Pipefather is offline   Reply With Quote
Old 02-07-2009, 11:46 AM   #37
Senior Member
iTrader: (14)
 
Join Date: Jan 2007
Location: Murfreesboro,TN
Posts: 1,279
Total Cats: 53
Default

Quote:
Originally Posted by N3v View Post
well, i don't really care, I already have the ITB's. I'll just do it for the cool factor. It might flow better because the pressure is being regulated right at the runners, and it might also have better response. I really don't know though. What is certain though, is that it'd be beastly. As long as it performs as well as an aftermarket manifold I'll be happy.
Well that was kind of how Jeremy came to it. He purchased a former CSP car that had the ITB's and a bunch of other parts. Took what he needed, so other parts to friends, and then sold the car itself (making money in the end).
Midtenn is offline   Reply With Quote
Old 02-07-2009, 08:27 PM   #38
Elite Member
iTrader: (7)
 
Join Date: Jan 2008
Location: Knoxville, TN
Posts: 2,121
Total Cats: 44
Default

ITB whoring time!

Name:  IMG_2540.jpg
Views: 76
Size:  118.9 KB
Name:  IMG_2542.jpg
Views: 76
Size:  119.2 KB
Name:  IMG_2539.jpg
Views: 76
Size:  131.6 KB
Name:  IMG_2546.jpg
Views: 76
Size:  130.3 KB
Name:  IMG_2547.jpg
Views: 76
Size:  160.3 KB
flier129 is offline   Reply With Quote
Old 02-07-2009, 09:33 PM   #39
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Lexington, SC
Posts: 2,084
Total Cats: 0
Default

lol what happened to your carbon fiber plate?
mazda/nissan is offline   Reply With Quote
Old 02-08-2009, 12:49 AM   #40
Senior Member
iTrader: (2)
 
Join Date: Aug 2007
Location: North Cackalackey
Posts: 716
Total Cats: 2
Default

Quote:
Originally Posted by flier129 View Post
ITB whoring time!
all this car needs is a turbo now
musanovic 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 59 12-15-2017 09:00 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
ISO 1.6 turbo cast iron manifold cale saurage DIY Turbo Discussion 16 10-01-2015 12:25 PM


Thread Tools

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 12:39 AM.