UofACATS DIY Turbo Kit - Page 3 - 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 09-27-2006, 05:41 PM   #41
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Quote:
Originally Posted by braineack View Post
Did you call Corky about couplers yet? He has the prices on the web:

http://www.bellengineering.net/Pages/products_hose.html
Not yet. Stupid "responsibility" gets in the way of the fun stuff.

Thanks for the link.
UofACATS is offline   Reply With Quote
Old 09-27-2006, 05:59 PM   #42
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Quote:
Originally Posted by m2cupcar View Post
Is there really such thing as stainless zip ties?
Metal zip ties do exist.

I used high-tech method of wraping the hoses with plain 'ol wire. You could also just use a worm type hose clamp, they're cheap enough.

Last edited by UofACATS; 09-27-2006 at 06:35 PM.
UofACATS is offline   Reply With Quote
Old 09-27-2006, 06:34 PM   #43
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Quote:
Originally Posted by getsidewaysd1 View Post
How come I see miata people place there bov on the hot side of there intercooler piping? Everything I have ever read, learned, or see the bov is ALWAYS on the cold side?
This is interesting, and i'm aware of the issue. Everything I've read argues back and forth, with both sides claiming success. Really, the issue for me is i'm using a thick, cast aluminum BOV adapter that I didn't want to drill into to attach the idle air port hose. I drilled an expendable piece of aluminum piping instead.

My setup allows me to switch the bov to the other side if necessary with a 6" piece of thin-wall steel pipe, a bov flange, and 30 seconds of welding. With this, I could rotate the bov 90* and it's a straight shot back to the intake pipe.

Some revelant info from TurboByGarrett:

"The Blow-Off valve (BOV) is a pressure relief device on the intake tract to prevent the turbo’s compressor from going into surge. The BOV should be installed between the compressor discharge and the throttle body, preferably downstream of the charge air cooler (if equipped)."

Do you think the turbo sees any difference?
UofACATS is offline   Reply With Quote
Old 09-27-2006, 07:49 PM   #44
Senior Member
iTrader: (14)
 
brgracer's Avatar
 
Join Date: Nov 2004
Location: Ambler, PA
Posts: 1,275
Total Cats: 1
Default

Quote:
Originally Posted by m2cupcar View Post
I thought you were going to reveal some kind of speed secret to keep plastic from metling. Is there really such thing as stainless zip ties?
See here: http://www.buycableties.com/catalog/?cid=14

I used to have some but used all of them. They are pricey, but good for heat prone areas or if you want the bling.
brgracer is offline   Reply With Quote
Old 09-27-2006, 07:55 PM   #45
Senior Member
iTrader: (14)
 
brgracer's Avatar
 
Join Date: Nov 2004
Location: Ambler, PA
Posts: 1,275
Total Cats: 1
Default

Quote:
Originally Posted by UofACATS View Post
Do you think the turbo sees any difference?
Makes sense to put it as close to the TB as possible as you are venting the pressurized air as the TB closes, but I don't think it makes all that much of a difference as the whole purpose of a bov is to keep the pressurized air from hitting a closed throttle plate and stalling out the compressor. If you open up a vent (bov) to air or the intake tract, essentially, you are providing a path for that pressurized air to take and it will take the path of least resistance.

Theoretically, I guess the further from the TB the bov is, the longer the pressure wave has to travel after reflecting off the throttle plate to get out, but I can't imagine it making a difference at reasonable boost levels. YMMV.
brgracer is offline   Reply With Quote
Old 09-27-2006, 08:54 PM   #46
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,236
Total Cats: 288
Default

Yeow- that's pricey. I still have some stainless steel lashing wire (telco grade) that's like safety wire... and it's free. That's what I've used up to this point. But I can definitely see some good use for those ss zip ties.
m2cupcar is online now   Reply With Quote
Old 09-27-2006, 09:04 PM   #47
Senior Member
iTrader: (7)
 
Join Date: Mar 2005
Location: VT
Posts: 939
Total Cats: 0
Default

Volvo used to have the BOV built into the comp housing. SAAB 900's had the BOV on both ends depending upon yr...They all seemed to work fine...
Jefe is offline   Reply With Quote
Old 09-28-2006, 12:55 AM   #48
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

/\ That's what i'm talking about. Both sides seem definitive, then along comes an example that legitimately contradicts it. I think the most logical viewpoint is from brgracer:

"the further from the TB the bov is, the longer the pressure wave has to travel after reflecting off the throttle plate to get out"

This is what I tend to agree with, as the wave has to pass through the I/C. Although, wont the I/C slow/soften or at least disrupt the "shockwave" of air?

Either way, with a BOV somewhere in the system, I can't see the turbo being adversely affected.
UofACATS is offline   Reply With Quote
Old 09-28-2006, 01:01 AM   #49
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Quote:
Originally Posted by brgracer View Post
I can't imagine it making a difference at reasonable boost levels.
This is the right answer for me. I guess once you hit 30 lbs, you can just run two
UofACATS is offline   Reply With Quote
Old 09-28-2006, 06:46 AM   #50
Senior Member
 
Join Date: Apr 2005
Location: NAS Oceana/VA
Posts: 759
Total Cats: 0
Default

Quote:
Originally Posted by UofACATS View Post
This is the right answer for me. I guess once you hit 30 lbs, you can just run two

LOL!
getsidewaysd1 is offline   Reply With Quote
Old 09-28-2006, 09:44 AM   #51
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,842
Total Cats: 1,787
Default

Are you recirulating it? If so you can argue the double-pass through the intercooler.
Braineack is offline   Reply With Quote
Old 09-28-2006, 10:14 AM   #52
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,236
Total Cats: 288
Default

it looks as though your BOV could just be moved over and swapped with the pipe at the tb- no?
m2cupcar is online now   Reply With Quote
Old 09-28-2006, 10:31 AM   #53
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,842
Total Cats: 1,787
Default

That does seem plausible.
Braineack is offline   Reply With Quote
Old 09-28-2006, 10:41 AM   #54
Senior Member
 
Join Date: Dec 2004
Posts: 1,450
Total Cats: -1
Default

Both my turbo Miata and my turbo OTM (Jetta 2.0T FSI) use bypass valve assemblies built into the compressor housing, FWIW.
bripab007 is offline   Reply With Quote
Old 09-28-2006, 03:00 PM   #55
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Quote:
Originally Posted by m2cupcar View Post
it looks as though your BOV could just be moved over and swapped with the pipe at the tb- no?
Quote:
Originally Posted by UofACATS View Post
My setup allows me to switch the bov to the other side if necessary with a 6" piece of thin-wall steel pipe, a bov flange, and 30 seconds of welding. With this, I could rotate the bov 90* and it's a straight shot back to the intake pipe.
See how the radiator hose is right in the way?



(TB side here) With the BOV mounted so it points straight down on the left side, I could put a nice, easy 90* bend under the radiator hose, then it's a nice straight shot across and back into the intake pipe.
UofACATS is offline   Reply With Quote
Old 09-28-2006, 03:21 PM   #56
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Quote:
Originally Posted by m2cupcar View Post
it looks as though your BOV could just be moved over and swapped with the pipe at the tb- no?
Also, this is the pipe at the t/b, which I would have to duplicate on the cast aluminum, greddy bov flanged pipe. Not that I won't do it if necessary, but drilling and tapping was easy on the thin aluminum pipe, plus if I screwed it up no biggie. Not so with the cast piece. Guess I should quit being a little b tch and just do it already?

-t/b side:


-hose attach:


-bov flange:
UofACATS is offline   Reply With Quote
Old 09-28-2006, 03:22 PM   #57
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,842
Total Cats: 1,787
Default

leave it, it doesn't really matter. You have BOV at least.
Braineack is offline   Reply With Quote
Old 09-28-2006, 10:33 PM   #58
Junior Member
 
Join Date: Jan 2006
Location: Tucson, Az
Posts: 53
Total Cats: 0
Default

I had that turbo on my old 95 GSX. Great turbo. I'd love a ride once you get it all done. I'll probably be putting a FM kit on in the next year or so. Im not liking a lot of the stuff they are doing though, so I might just get their exhaust manifold and turbo.
stinkonamonkey is offline   Reply With Quote
Old 09-28-2006, 11:03 PM   #59
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Quote:
Originally Posted by stinkonamonkey View Post
I had that turbo on my old 95 GSX. Great turbo. I'd love a ride once you get it all done. I'll probably be putting a FM kit on in the next year or so. Im not liking a lot of the stuff they are doing though, so I might just get their exhaust manifold and turbo.
Whats up? John right? Heck yes, free rides for everyone when it's ready. I have a growing list of people to contact but I think it's great.

As for the T28, as long as it's rocking by 4K i'm good. FP sure knows how to make em.

I dig what BEGI is doing these days. (right behind the self torturous yet somehow rewarding way of the DIY kit.)

Have a good one dude. I have your contact info, i'll let you know.

Noah.
UofACATS is offline   Reply With Quote
Old 09-29-2006, 08:48 PM   #60
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Today I hooked up a wastegate "spring" (a la someone here I forget who) I'm stalling on pulling and tapping the compressor housing to attach the wastegate actuator, and I managed to find this spring laying around. My actuator rod also has to be cut and re-welded at a different angle. The bracket holding the spring is the MAF bracket, so this is free until I do something about it. It feels a lot easier to extend than does my 8lb wastegate, so it might give me half that.

I was going to hook up my boost gauge from another car, but I forgot it's also a turbo timer, which has a vehicle-specific harness, which means more trouble than it's worth. I'll just buy a gauge. Oh well, wanted to see vacuum at idle as well.

UofACATS is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Need help - Stock Balancer and Fastforward overlay pulleys Frank_and_Beans Supercharger Discussion 13 09-12-2016 09:17 PM
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Koni 1150 Coilover Kit drumman83 Suspension, Brakes, Drivetrain 2 09-25-2015 08:03 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 04:11 PM.