K series Miata swap - Page 23 - 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 03-03-2014, 05:14 AM   #441
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Sweden
Posts: 1,392
Total Cats: 58
Default

Quote:
Originally Posted by thebutcher View Post
My biggest worry is that the stock transmission is still being used. If someone slapped a turbo on the K it would kill all miata trannies. A 500hp K is not too hard to do. I really want to do this and have a K24 in the garage now. Just worry about the trans.
Then make another adapter plate and use a T56.

Or skip the turbo
NiklasFalk is offline   Reply With Quote
Old 03-03-2014, 06:05 AM   #442
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,109
Total Cats: 48
Default

well looks like your in the same boat as not putting this motor in. You can kill miata trannys just as fast with a turbo BP. The Miata community needs to find a cure for the 6speed like the DSM and Honda guys did with their trannys, wether it be gear sets or just surface treatments. We could use one of these companies like 949,track speed,flying miata to spend time developing products to fix the 6 speed weakness at high hp levels.
ctdrftna is offline   Reply With Quote
Old 03-03-2014, 06:17 AM   #443
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Sweden
Posts: 1,392
Total Cats: 58
Default

Quote:
Originally Posted by ctdrftna View Post
well looks like your in the same boat as not putting this motor in. You can kill miata trannys just as fast with a turbo BP. The Miata community needs to find a cure for the 6speed like the DSM and Honda guys did with their trannys, wether it be gear sets or just surface treatments. We could use one of these companies like 949,track speed,flying miata to spend time developing products to fix the 6 speed weakness at high hp levels.
If you are eating 6sp with a boosted 1.8 on track, going to 2.4 liters will not help much.
If you keep it N/A there will be much less problems, even if you make it a 350whp screamer since the torque values will be much less (max power at 9krpm, not 6).

Fixing the 6sp will only get you so far, even the Nismo gears will have problems with a 600whp dyno queen.

When there are 10+ boosted K24yatas running endurance the problems will be solved (using racing transmissions), but that is not the case, yet.

But if you keep the K24 stock, even the 5sp will be fine, keeping it simple.
NiklasFalk is offline   Reply With Quote
Old 03-03-2014, 07:43 PM   #444
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,109
Total Cats: 48
Default

my plans for the k24a2 are stock internals with airflow mods and kpro tune, then kraftwerks rotrex kit later on. Big linear power that should still be 6spd safe.
ctdrftna is offline   Reply With Quote
Old 03-03-2014, 08:26 PM   #445
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 445
Total Cats: 145
Default

Lots of valid points, and I'll address a couple.

1) if you want a 500+whp Miata, this probably isn't a setup for you for (for now). If there is a demand for this, then we will explore other trans options and adapter plates (T56, S2000, etc).

2) the reason for using the stock Miata trans is to keep it simple, cheaper, more OEM, retain the full OEM drivetrain. As long as we already had to make an adapter plate, the trans that came in the car was the obvious choice.

3) the initial intention of this kit is for N/A K series setups. The beauty of this swap is to be able to make 230-250whp out of a $1000 junkyard longblock. As torquey as the K24 is, you will still make less wtq than a boosted BP setup, and with a more linear power band.

I plan on running all summer on my original 5 speed trans for testing, and final torque should be around 185-190. I suspect it will be fine, considering I'll just be shifting between 3, 4, and 5 on track, at 8000 rpm.
KMiata is offline   Reply With Quote
Old 03-03-2014, 09:34 PM   #446
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,109
Total Cats: 48
Default

People here would rather see a reverse graph, meaning all the power and torque at 3000 and have it fall off past that.
ctdrftna is offline   Reply With Quote
Old 03-04-2014, 12:15 PM   #447
Elite Member
 
Join Date: Dec 2008
Location: Colorado
Posts: 1,669
Total Cats: 36
Default

The real solution is the Quaiffe 5 speed gear set. Sadly, that's far more $$ than even a T56. And I don't see US distributors for it anymore.

The most awesomest possibility would be OBX making a similar gear set to Quaiffes for about 1500-2000 bucks. For one thing that would slowly flood the market with 6 speeds from BP turbo guys. But a whole gear set is a tall order and I don't think that's going to happen.

Honestly, if I were going for a reliable track rat that could handle endurance racing somewhere like Miller with lots of long stretches that reward brute power: This setup with an AZ6 out of an S2000. Adapt the PPF (it's been done), figure the VSS electronically if you care. I ran for years without a speedometer on my street car and got no tickets. Use the existing trans adaptor parts for K swaps into S2000s. Use the sweet K member and oiling deal and header from this setup. Do some low boost high efficiency setup that wont create a ton of heat, maybe Rotrex. Go blast about with 500 WHP, less weight than a the V8 guys and less heat than the BP guys.

But I don't plan on building said demon. I want to build a nice fun street car, and I'll run the 5 speed until it blows up (if ever) then throw in the 6. With a K24 a healthy 6 speed is probably good to 400WHP and low 300sTQ. At that point you will be too busy feeding the car tires and brake pads to worry about much else anyway.
Sparetire is offline   Reply With Quote
Old 03-06-2014, 03:14 PM   #448
Junior Member
 
Join Date: Jan 2012
Location: Miami
Posts: 210
Total Cats: 1
Default

Quote:
Originally Posted by ctdrftna View Post
People here would rather see a reverse graph, meaning all the power and torque at 3000 and have it fall off past that.
There's that, and then there are guys like me. I just want to drop a stock TSX motor in the damn car and have a fun autox/street car. I'd shamelessly run the stock TSX ECU and not bother adding power. I have other vehicles available for boosted fury.
MatosMiata is offline   Reply With Quote
Old 03-06-2014, 03:22 PM   #449
Elite Member
iTrader: (3)
 
Join Date: Feb 2008
Location: Huntsville, AL
Posts: 1,882
Total Cats: 45
Default

Stock Honda K-series ECUs are a pain to use. You need all of the anti-theft stuff with them.

You could use some of the JDM ECUs that don't have anti-theft, but they can be hard to come by.
vehicular is offline   Reply With Quote
Old 03-06-2014, 03:30 PM   #450
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,109
Total Cats: 48
Default

You can get a eliminator for the imobilzer from ktuned
ctdrftna is offline   Reply With Quote
Old 04-11-2014, 06:38 AM   #451
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,109
Total Cats: 48
Default

They just posted pictures of the final prototypes for the oil system.
Attached Thumbnails
K series Miata swap-miata-oil-pan.jpg  
ctdrftna is offline   Reply With Quote
Old 04-11-2014, 09:32 AM   #452
Junior Member
 
Join Date: Jan 2012
Location: Miami
Posts: 210
Total Cats: 1
Default

I've been wondering for awhile now, how will you be able to drain the oil from both sides of that pan? Are there two drain plugs? How will the pickup get oil from both sides? I take it there is something I'm missing here?
MatosMiata is offline   Reply With Quote
Old 04-11-2014, 11:32 AM   #453
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 445
Total Cats: 145
Default

Quote:
Originally Posted by MatosMiata View Post
I've been wondering for awhile now, how will you be able to drain the oil from both sides of that pan? Are there two drain plugs? How will the pickup get oil from both sides? I take it there is something I'm missing here?
Yes, there are two drain plugs.

The pickup obviously only gets oil from the larger back section which is baffled. However, with the pan full, oil covers the "tunnel." Oil is constantly being displaced between the two sections as it get poured back down through the engine and pumped back up.

We have tested this design thoroughly and it works just like stock. It's also not the first oil pan with this shape.
KMiata is offline   Reply With Quote
Old 04-11-2014, 11:53 AM   #454
Senior Member
 
Join Date: Sep 2013
Posts: 903
Total Cats: 59
Default

On one hand, I want to congratulate you for doing an excellent job and really proving to everyone that this isn't a half-assed solution.

On the other hand, I want to yell your name in vain because my Amex is wiggling out of my wallet.
Dunning Kruger Affect is offline   Reply With Quote
Old 04-11-2014, 12:01 PM   #455
Elite Member
iTrader: (13)
 
Join Date: Dec 2006
Location: Taos, New mexico
Posts: 5,704
Total Cats: 237
Default

Quote:
Originally Posted by Dunning Kruger Affect View Post
On one hand, I want to congratulate you for doing an excellent job and really proving to everyone that this isn't a half-assed solution.

On the other hand, I want to yell your name in vain because my Amex is wiggling out of my wallet.
I hope you make and sell these kits successful. Because in a few years when I finish my house and garage, this is next on the list.
Fireindc is offline   Reply With Quote
Old 04-11-2014, 03:44 PM   #456
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 445
Total Cats: 145
Default

Quote:
Originally Posted by Dunning Kruger Affect View Post
On one hand, I want to congratulate you for doing an excellent job and really proving to everyone that this isn't a half-assed solution.

On the other hand, I want to yell your name in vain because my Amex is wiggling out of my wallet.
Thank you for your kind words.

So what you're saying is that I should add you to the group buy list
KMiata is offline   Reply With Quote
Old 04-12-2014, 08:48 AM   #457
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,109
Total Cats: 48
Default

Can you get us some pictures of the exhaust routing under the car?
ctdrftna is offline   Reply With Quote
Old 04-13-2014, 07:32 PM   #458
Supporting Vendor
iTrader: (3)
 
Join Date: Jul 2006
Location: San Diego
Posts: 2,866
Total Cats: 496
Default

Quote:
Originally Posted by magicdc2 View Post
So what you're saying is that I should add you to the group buy list
Where is this list?
ThePass is offline   Reply With Quote
Old 04-13-2014, 08:23 PM   #459
Supporting Vendor
iTrader: (1)
 
Join Date: May 2010
Location: San Diego
Posts: 491
Total Cats: 39
Default

Quote:
Originally Posted by ThePass View Post
Where is this list?
+1.
Lincoln Logs is offline   Reply With Quote
Old 04-14-2014, 10:57 AM   #460
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 445
Total Cats: 145
Default

Quote:
Originally Posted by ctdrftna View Post
Can you get us some pictures of the exhaust routing under the car?
I'll get a pictures next time its on a lift. We will be finalizing the exhaust setup soon.

Quote:
Originally Posted by ThePass View Post
Where is this list?
Just send me an email to [email protected] with your info and you'll be notified once its available.
KMiata is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
NEW-Wiseco Piston, K1 Rods, Supertech Valves & Spring/Retainer, TB&C pedals Rudes333 Miata parts for sale/trade 17 11-05-2015 02:16 PM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
Another Alternator thread ihiryu General Miata Chat 9 09-28-2015 11:22 AM
starting issue Johnny Tater Engine Performance 3 09-23-2015 07:10 PM
Foreign powered NB for NASA ST3 and/or E0 d k Race Prep 44 09-15-2015 11:59 AM


Tags
k series swap, k20, k24, vtec_yo

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 04:54 PM.