diy "turbo no hit block" '00 BP miata - Page 5 - 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 10-07-2014, 01:21 PM   #81
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

Quote:
Originally Posted by turbofan View Post
Also: ironically, "turbo" mufflers are not good for turbos. You want a large, straight through muffler. The turbo-labeled mufflers have chambers and bends inside which are not good for turbocharged vehicles.
really?
I've bought it because I think is pretty much a straight pipe with two chamber, there aren't restriction of any type, all internals are 2.5", and my exhaust is 2 1/4" (60mm)
All I want now is a silent exhaust, I can't drive with that loudness anymore...
Can it flow decently or is a very bad idea to put it on?
consider that I don't have any cat, resonator, nothing at all: only a 60mm straight pipe from the turbine to the muffler


source:



Attached Thumbnails
diy "turbo no hit block" '00 BP miata-4939_2_lg_zps19520b52.jpg  
DNA54 is offline   Reply With Quote
Old 10-07-2014, 01:54 PM   #82
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,421
Total Cats: 469
Default

Can it flow decently? Sure. Is it optimal? Not even close. Can you get similar muffling with better performance? Yes.

The straight through Magnaflows are really what you want, that's why everyone here uses them. They're not as cheap as the "turbo" mufflers though.
turbofan is offline   Reply With Quote
Old 10-07-2014, 02:14 PM   #83
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 14,391
Total Cats: 1,252
Default

Quote:
Originally Posted by DNA54 View Post
^Paid infomercial.

Look, yes, it will be quiet. Yes, it will slightly degrade performance. No, it won't be terrible. There have been plenty of quiet factory turbocharged cars that use the same style of muffler. Removing them usually makes the car spool faster and make a bit more power. But it isn't the end of the world. Just don't complain if you lose 10-15whp.
sixshooter is offline   Reply With Quote
Old 10-07-2014, 02:15 PM   #84
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,421
Total Cats: 469
Default

^ yup
turbofan is offline   Reply With Quote
Old 10-10-2014, 03:47 PM   #85
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

Quote:
Originally Posted by sixshooter View Post
^Paid infomercial.

Look, yes, it will be quiet. Yes, it will slightly degrade performance. No, it won't be terrible. There have been plenty of quiet factory turbocharged cars that use the same style of muffler. Removing them usually makes the car spool faster and make a bit more power. But it isn't the end of the world. Just don't complain if you lose 10-15whp.
well, it's a price I can pay to get a silent muffler... Thank you for the advice!

shaved, back from the machine shop





my new toy





last but not least:
bammm, surprise!!!



internal diameter is now the same as the stock exhaust...
I have 2 choices
-remove the internal metal mesh
-remove the joint and weld a straight pipe

problems, problems everywhere
Attached Thumbnails
diy "turbo no hit block" '00 BP miata-dscf3250_zpsc3ad8af2.jpg   diy "turbo no hit block" '00 BP miata-dscf3249_zps6f47a03e.jpg   diy "turbo no hit block" '00 BP miata-dscf3251_zps7bbcf897.jpg   diy "turbo no hit block" '00 BP miata-dscf3254_zpsa7ec8c15.jpg   diy "turbo no hit block" '00 BP miata-dscf3256_zpse9a67fe1.jpg  

DNA54 is offline   Reply With Quote
Old 10-11-2014, 07:43 AM   #86
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 14,391
Total Cats: 1,252
Default

Replace with part that doesn't suck. You do typically need some flex. You may reuse the flanges and just get a flex joint that doesn't suck.
sixshooter is offline   Reply With Quote
Old 10-11-2014, 09:16 AM   #87
Senior Member
 
Join Date: Feb 2009
Location: Philadelphia
Posts: 773
Total Cats: 43
Default

There is nothing straight through about that muffler in the cutaway. In fact I don't even see how the gasses get from the inlet to the outlet.
Mazdaspeeder is offline   Reply With Quote
Old 10-11-2014, 11:06 AM   #88
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 14,391
Total Cats: 1,252
Default

Quote:
Originally Posted by Mazdaspeeder View Post
There is nothing straight through about that muffler in the cutaway. In fact I don't even see how the gasses get from the inlet to the outlet.
Magic.

But seriously, that's a bad angle to see it but the ends of the tubes are open right through those internal bulkheads.
sixshooter is offline   Reply With Quote
Old 10-11-2014, 02:15 PM   #89
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

Quote:
Originally Posted by sixshooter View Post
Replace with part that doesn't suck. You do typically need some flex. You may reuse the flanges and just get a flex joint that doesn't suck.
I can't get anything better in Italy, I temporarily leave it without internal mesh. If it resist, I call it a day. In the other case: rigid joint







I want the car back!!!
Attached Thumbnails
diy "turbo no hit block" '00 BP miata-20141011_195001_zpse57cafd8.jpg   diy "turbo no hit block" '00 BP miata-20141011_195005_zps4a6e5b35.jpg   diy "turbo no hit block" '00 BP miata-20141011_195013_zpsd17e848f.jpg  
DNA54 is offline   Reply With Quote
Old 10-11-2014, 04:26 PM   #90
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,055
Total Cats: 196
Default

Quote:
Originally Posted by Mazdaspeeder View Post
...I don't even see how the gasses get from the inlet to the outlet.
blue line shows exhaust gas route- it passes around the middle inlet. I used one for a while, but yeah it makes a mess of exhaust gasses since it just dumps into the big can.

Attached Thumbnails
diy "turbo no hit block" '00 BP miata-screen-shot-2014-10-11-4.24.13-pm.png  
m2cupcar is offline   Reply With Quote
Old 10-12-2014, 04:01 PM   #91
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

Quote:
Originally Posted by m2cupcar View Post
blue line shows exhaust gas route- it passes around the middle inlet. I used one for a while, but yeah it makes a mess of exhaust gasses since it just dumps into the big can.

I will try it, if I loose too much hp on the butt dyno, I will search a better muffler
... or I will splice the exhaust in two 60mm pipes with two "turbo mufflers"

but for now, magnaflow straight muffler


some photos of the baby:





and, for lurkers, the massive compressor wheel



Attached Thumbnails
diy "turbo no hit block" '00 BP miata-20141012_124745_zps6cd916f0.jpg   diy "turbo no hit block" '00 BP miata-20141012_124753_zpsd054657a.jpg   diy "turbo no hit block" '00 BP miata-20141011_210548_zpsbeebd2da.jpg  
DNA54 is offline   Reply With Quote
Old 10-21-2014, 03:20 AM   #92
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

new oled display



It's very cool: I don't need to delay the refresh like with the lcd one, and it's 100% visible from any condition (angolation, light/dark, etc)
Attached Thumbnails
diy "turbo no hit block" '00 BP miata-10257172_10204194962106348_7666743568674467858_o_zps0b090e35.jpg  
DNA54 is offline   Reply With Quote
Old 10-21-2014, 03:24 AM   #93
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

aaand: turbo muffler installed



As you all told me, I lose something on the butt dyno, expecially at high revs (over 6500)

I'm pretty curious to dyno the car with/without the muffler, to see how much I lost
Attached Thumbnails
diy "turbo no hit block" '00 BP miata-20141020_211355_zps9ad8e84e.jpg  
DNA54 is offline   Reply With Quote
Old 10-22-2014, 04:01 AM   #94
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

Then dna said, "Let there be track"; and there was overheat.


only one lap before hit 100C, but the car was great!
I have a LOT to learn on a track, but next time I need at least a 50mm radiator.

Will this be ok?

http://www.ebay.it/itm/400763045502?...84.m1423.l2649

o this one is better?

http://www.ebay.it/itm/131099412197?...84.m1423.l2649

the most important thing is the slim fans: I have 2.5" intake line
DNA54 is offline   Reply With Quote
Old 10-22-2014, 06:48 AM   #95
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 14,391
Total Cats: 1,252
Default

100*C (212*F) is not overheating. That is normal. If it gets to 230*F then you must slow down and cool off.

External oil coolers are a good idea as well as the bigger radiator. I don't have any opinions about the two radiators you listed other than the fact that having a fan shroud is a good thing.
sixshooter is offline   Reply With Quote
Old 10-22-2014, 08:39 AM   #96
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,055
Total Cats: 196
Default

Agreed- that's not hot. I like having an oil temp gauge. Should we assume you have taken all the preliminary steps to improving the stock cooling systems as posted on this site?
m2cupcar is offline   Reply With Quote
Old 10-24-2014, 01:54 AM   #97
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

At the end of the second lap the temperature rises to 120C (248*F)
I've only done a reroute and the radiator ducting, and on the road the maximum temperature I can see is 100C

I really hope I can solve with a bigger core...
the oil cooler is really necessary? It's my daily car, I plan to go on track maximum 2-3 times a year
DNA54 is offline   Reply With Quote
Old 10-24-2014, 05:13 AM   #98
Senior Member
 
Join Date: Dec 2004
Location: Brisbane, Australia
Posts: 1,271
Total Cats: 32
Default

I like the 20hp sticker.
timk is offline   Reply With Quote
Old 10-24-2014, 10:59 AM   #99
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 14,391
Total Cats: 1,252
Default

A larger core will help both in thermal capacity (more coolant volume takes longer to heat up) and in more surface area to aid in heat transfer.

An external oil cooler isn't a big deal to install if you've already done things like adding a reroute. They make a difference.
sixshooter is offline   Reply With Quote
Old 10-24-2014, 11:15 AM   #100
Junior Member
Thread Starter
 
DNA54's Avatar
 
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 369
Total Cats: 49
Default

news: if I stop the engine at 100C around half a litre exits from the coolant tank.
Cooked head gasket? Maybe is the overheat problem cause...
DNA54 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
TunerStudio timining issue - 90 Miata 1.6 Turbo spec1sef MEGAsquirt 28 05-09-2017 07:03 AM
Project DDoS: '99 "Budget" boost build ProjectDDoS Build Threads 1 09-09-2015 01:52 PM
New here, saying hi, here's what I'm workin with. SuperSneakySecretSquirrel Meet and Greet 5 09-06-2015 08:30 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 02:13 AM.