5 speed power capabilities with boost - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 05-01-2014, 06:22 PM   #1
Newb
Thread Starter
 
Join Date: Apr 2014
Posts: 13
Total Cats: -25
Default 5 speed power capabilities with boost

Hey just wondering how much power can a 5 Mt hold looking at boost
trae is offline   Reply With Quote
Old 05-01-2014, 06:28 PM   #2
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 784
Default

Some of it.
concealer404 is offline   Reply With Quote
Old 05-01-2014, 06:28 PM   #3
Elite Member
iTrader: (2)
 
Join Date: Aug 2012
Location: Indianapolis
Posts: 3,325
Total Cats: 235
Default

Hey just wondering why you can't read the stickies instead of posting.
thenuge26 is offline   Reply With Quote
Old 05-01-2014, 06:29 PM   #4
I haz no trubo
iTrader: (2)
 
Oscar's Avatar
 
Join Date: Jan 2007
Location: Bolton, UK
Posts: 3,021
Total Cats: 114
Default

Oh if only this was documented somewhere on this site.
Oscar is offline   Reply With Quote
Old 05-01-2014, 07:25 PM   #5
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,930
Total Cats: 526
Default

I don't know why these guys are being such dbags when all you did was ask a simple question.

The stock 5 speed is kind of a glass case and will break pretty early, like around 5-8 psi. The rods, on the other hand, are super strong, good for 20+ psi. People put Miata rods in all sorts of other engines as upgrades. Little race secret for ya
turbofan is offline   Reply With Quote
Old 05-02-2014, 09:13 AM   #6
Elite Member
iTrader: (2)
 
fooger03's Avatar
 
Join Date: Jan 2009
Location: Columbus, OH
Posts: 4,133
Total Cats: 188
Default

Trae - it depends on the year of the transmission.

90-93 5MTs are generally luck of the draw - some go at around 150hp, others have been documented to 475hp for hundreds of track hours.

Starting in 94 and going through the 97MY in North America (98MY everywhere else), they pretty much all became butter. 175hp is generally the limit, some have gone to 200hp. There are no documented '94-'97 transmissions running over 215hp long enough to get a good dyno pull in.

To fix this problem, mazda re-looked the 5 speed, but since they ran out of time for the '98 model year, they adapted the old RX7 trans to the Miata in North America for only the '98 cars. Those RX7 transmissions are beasts - there are only 2 documented cases of the '98 RX7 trans going in the Miata, both well over 650AWHP.

Starting in '99, Mazda had generally fixed the problem, and all of the 5 speeds from 99 through end of production are generally expected to hold 450-500 HP for the life of the car. The '99 and on transmissions use different mounting points, though, and are not compatible with any previous Miatas without also replacing the entire front subframe and using the shorter PPF.
fooger03 is offline   Reply With Quote
Old 05-02-2014, 11:22 AM   #7
Senior Member
iTrader: (3)
 
Join Date: Apr 2011
Location: Volo, IL
Posts: 1,247
Total Cats: 140
Default

Quote:
Originally Posted by turbofan View Post
The stock 5 speed is kind of a glass case and will break pretty early, like around 5-8 psi.
Isn't this dependant on what turbo is being used? I can imagine it grenading at 5-8psi with a huge turbo, but I've had no issues at 12 psi with my little TD04H.
dieselmiata is offline   Reply With Quote
Old 05-02-2014, 11:30 AM   #8
Elite Member
iTrader: (2)
 
Join Date: Aug 2012
Location: Indianapolis
Posts: 3,325
Total Cats: 235
Default

Hey now, no real info allowed. We are trolling a noob here.
thenuge26 is offline   Reply With Quote
Old 05-02-2014, 11:32 AM   #9
Senior Member
iTrader: (3)
 
Join Date: Apr 2011
Location: Volo, IL
Posts: 1,247
Total Cats: 140
Default

****, whoops.
dieselmiata is offline   Reply With Quote
Old 05-02-2014, 11:37 AM   #10
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

I grenaded my 5sp with 900whp, but I was granny shifting not double clutching
18psi is offline   Reply With Quote
Old 05-02-2014, 11:39 AM   #11
Elite Member
iTrader: (2)
 
Join Date: Aug 2012
Location: Indianapolis
Posts: 3,325
Total Cats: 235
Default

Congrats OP

You are the 1,000,000th person to ask that question! As your prize, you will be awarded as much sarcasm as we can fit in this thread. If you want an answer, search.
thenuge26 is offline   Reply With Quote
Old 05-02-2014, 11:40 AM   #12
Senior Member
iTrader: (5)
 
Join Date: Jul 2011
Location: Sonora, Ca
Posts: 623
Total Cats: 73
Default

If you double clutch all of your shifts they've been track proven to be pretty reliable upwards of 350+ hp. Its the horsepower that kills them not the torque.
bikersam717 is offline   Reply With Quote
Old 05-02-2014, 11:41 AM   #13
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

just install a 1.6 that way you limit your horsepower but have diesel-like torque
18psi is offline   Reply With Quote
Old 05-02-2014, 11:46 AM   #14
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,695
Total Cats: 1,562
Default

I'm actually using diesel in mine right now. It required different spark plugs but the torque output is increased by about 38%. It also lets you belch giant clouds of black smoke when you floor the throttle, which is pretty cool.
sixshooter is online now   Reply With Quote
Old 05-02-2014, 11:48 AM   #15
Senior Member
iTrader: (3)
 
Join Date: Apr 2011
Location: Volo, IL
Posts: 1,247
Total Cats: 140
Default

I hear diesel in a Miata is a pretty cool thing.
dieselmiata is offline   Reply With Quote
Old 05-02-2014, 11:58 AM   #16
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,930
Total Cats: 526
Default

Quote:
Originally Posted by dieselmiata View Post
Isn't this dependant on what turbo is being used? I can imagine it grenading at 5-8psi with a huge turbo, but I've had no issues at 12 psi with my little TD04H.
No dude, size of turbo, type of clutch, driving style, etc. Has nothing to do with how long the parts will last. Only how much boost you're pushing. Don't you know that's why that's the only question people ask anymore? "How much boost will the engine take" cuz that's all that matters.

Quit complicating the situation with facts.
turbofan is offline   Reply With Quote
Old 05-02-2014, 12:01 PM   #17
Senior Member
iTrader: (3)
 
Join Date: Apr 2011
Location: Volo, IL
Posts: 1,247
Total Cats: 140
Default

I guess I deserve an eggplant as much as OP this morning.
dieselmiata is offline   Reply With Quote
Old 05-02-2014, 12:08 PM   #18
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

when I go car shopping, the one and only question I ever ask is: how much b00zt will it hold bro'z
18psi is offline   Reply With Quote
Old 05-02-2014, 12:59 PM   #19
Senior Member
iTrader: (5)
 
Join Date: Jul 2011
Location: Sonora, Ca
Posts: 623
Total Cats: 73
Default

Fun Fact: customer at work buying a new Jetta GLI at work the other day, overhear them asking the sales person "how much boost does it put out?"
bikersam717 is offline   Reply With Quote
Old 05-02-2014, 01:20 PM   #20
I'm a terrible person
iTrader: (19)
 
FRT_Fun's Avatar
 
Join Date: Apr 2009
Location: Arizona
Posts: 7,293
Total Cats: 180
Default

Go with the 4spd, much stronger and better for boost because of the longer gearing. The 4spds only came on the 89' model year so you have to look a bit, but they are out there (most people "upgrade" them to the 5spd because they are stupid).
FRT_Fun 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
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM


Tags
sent by hyper, troll bait

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 10:55 AM.