Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Performance & Tuning > Engine Performance
Reload this Page >

K-swap How-to: A by-the-book K24A2 NB2 swap build thread

Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

K-swap How-to: A by-the-book K24A2 NB2 swap build thread

 
Old 09-22-2016, 04:53 PM
  #121  
Junior Member
iTrader: (18)
 
Join Date: Aug 2006
Location: Temple City, Ca
Posts: 303
Total Cats: 0
Default

Any plans to boost the K24? Although I have a feeling neither the 5 or 6 speed tranny will hold up with that amount of torque.
Hi Im Simon is offline  
Old 09-22-2016, 06:50 PM
  #122  
Supporting Vendor
Thread Starter
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,310
Total Cats: 2,019
Default

Originally Posted by Hi Im Simon View Post
Any plans to boost the K24? Although I have a feeling neither the 5 or 6 speed tranny will hold up with that amount of torque.
None
__________________

High-Performance Turbo Specialists - Sunnyvale, CA - Email us!

Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
Savington is offline  
Old 09-22-2016, 07:07 PM
  #123  
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 6,132
Total Cats: 1,513
Default

Originally Posted by Hi Im Simon View Post
Any plans to boost the K24? Although I have a feeling neither the 5 or 6 speed tranny will hold up with that amount of torque.
Do the math. Way easier/cheaper to boost a BP and you're still way over the torque capacity of the AZ-6. Sweet spot of a K swap is a junkyard K24, N/A on pump gas with a few bolt ons. Anything past that and it's akin to trying to build a 190whp N/A BP, rapidly diminishing returns.
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.27 SNR
emilio700 is offline  
Old 09-23-2016, 05:39 AM
  #124  
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,146
Total Cats: 53
Default

I wouldn't say diminishing returns at all, if NA power is what your after. I looked at the swap as having the best platform to build on. A great chassis with a great motor, i didn't nickel and dime my swap and compare it to a boosted BP because i know that the purpose of the swap was to upgrade the ultimate potential of the car boosted or NA. After having the car running for over a year now I can say that i would go this route over a boosted BP any day.

Now i have a car that can be 300 whp NA and not over power the miata drivetrain. Or i can have a 500 whp boosted car and i would be in the same boat as the big turbo BP guys. But the cost of the swap sometimes needs to be a wash. We all spend money on these cars because we love these cars. There are much better options out the for HP per dollar.

If you can forget what you spent to get the motor into the car and look at the cost of a motor build vs motor build, the K wins every time. Its 10k for a supermiata whammy engine with all the bells and whistles for maybe 200whp, for that same amount 4piston racing can give you a 340whp K24. Bolt on a turbo kit to a BP for 5k and you get 250 whp Bolt on a turbo kit on a k24 for 5k and you get 450 whp.
ctdrftna is offline  
Old 09-23-2016, 01:35 PM
  #125  
Elite Member
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Laguna Hills, CA
Posts: 7,220
Total Cats: 628
Default

Originally Posted by ctdrftna View Post
If you can forget what you spent to get the motor into the car
Well sure, if you can just forget the $6-7k you have to spend to get to the baseline......
turbofan is offline  
Old 09-23-2016, 02:05 PM
  #126  
Senior Member
 
Scaxx's Avatar
 
Join Date: Sep 2015
Location: Seattle, WA
Posts: 1,150
Total Cats: 377
Default

Originally Posted by turbofan View Post
Well sure, if you can just forget the $6-7k you have to spend to get to the baseline......
Ooooh I like this game, I'll just forget the 30k I spent swapping my engine I can get like 600whp for a few thousand with a supercharger. That's how things work right?

Anyone able to match 600whp for 5-6 grand?
Scaxx is offline  
Old 09-23-2016, 02:10 PM
  #127  
Elite Member
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Laguna Hills, CA
Posts: 7,220
Total Cats: 628
Default

I think you've got us there.

ANYWAY... A lot of it is preference. You can get 500 whp for $15k (conservatively, realistically more like $20k with a beefy drivetrain needed to hold it) and a turbo'd KSwap doing all the work yourself. Or, you can get a little less than that for about the same money with an LS swap. Different strokes.

I Should probably stop promoting the thread drift though. This is a beautiful build.

Last edited by turbofan; 09-23-2016 at 03:29 PM.
turbofan is offline  
Old 09-23-2016, 03:12 PM
  #128  
Supporting Vendor
Thread Starter
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,310
Total Cats: 2,019
Default

Originally Posted by Scaxx View Post

Anyone able to match 600whp for 5-6 grand?
Forget about the $20k it takes to put an LSx into a Miata chassis and the $500-700 for the HPTuners license and dyno retune is the cheapest 400whp you'll ever buy
__________________

High-Performance Turbo Specialists - Sunnyvale, CA - Email us!

Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
Savington is offline  
Old 09-23-2016, 08:12 PM
  #129  
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,146
Total Cats: 53
Default

Originally Posted by turbofan View Post
Well sure, if you can just forget the $6-7k you have to spend to get to the baseline......
right, it's a wash. it's only money, you'll make more. Cars are no investment, you do it cause it makes you happy.
ctdrftna is offline  
Old 03-01-2017, 11:15 PM
  #130  
Senior Member
iTrader: (2)
 
Join Date: Oct 2011
Location: SE NM
Posts: 1,495
Total Cats: 48
Default

I can't see any of the pictures anymore and this thread needs an update anyways...
Chilicharger665 is offline  
Old 03-01-2017, 11:33 PM
  #131  
Newb
 
Join Date: Mar 2016
Posts: 10
Total Cats: 2
Default

Originally Posted by Chilicharger665 View Post
I can't see any of the pictures anymore and this thread needs an update anyways...
well, I've been driving the car basically every day since the last update here.

Once I get my other car and can have this laid up again, I might start planning a ground up engine build, get it prepped and ready to drop in, then spend a weekend doing the swap. I'd love to have another 40 or so WHP at least.
Kaustic is offline  
Old 03-01-2017, 11:44 PM
  #132  
Newb
 
Join Date: Mar 2016
Posts: 10
Total Cats: 2
Default

Bonus picture. I really just wanted something to move my bike around quickly :-P
Kaustic is offline  
Old 03-02-2017, 08:16 AM
  #133  
Junior Member
iTrader: (1)
 
Join Date: Feb 2016
Location: Halifax, NS
Posts: 162
Total Cats: 21
Default

I always feel it's necessary to plug my own solution when I see this. (PS, ignore the flats on the road bike, my dad borrowed it)

MetalMuffins is offline  
Old 03-02-2017, 09:46 AM
  #134  
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 578
Total Cats: 273
Default

First KMiata with a bicycle attached to the back? I think so!
KMiata is offline  
Old 03-03-2017, 11:46 AM
  #135  
Newb
 
Join Date: Jun 2015
Location: Hereford,UK
Posts: 22
Total Cats: -1
Default

A superb creation and definitely the way to go.However us poor devils on this side of the pond have a steering column in the wrong position for the inlet..
Will have to look into clearances and freight cost for a full install kit.

Last edited by phildent; 03-03-2017 at 11:58 AM.
phildent is offline  
Old 05-03-2017, 04:38 PM
  #136  
Ian
Junior Member
iTrader: (2)
 
Join Date: Jan 2012
Posts: 165
Total Cats: 4
Default

Originally Posted by Savington View Post
A DW100 replaces the factory fuel pump in the tank for a little extra capacity without overpowering the OEM 60psi FPR.

Apologies for the mild thread-jack - what did you use for fuel safe heat shrink on your in-tank rewire? I tried some PTFE heat shrink I found on Amazon, but it's not sealing completely. Given the intended environment, it's not work taking any risks.

TIA
Ian is offline  
Old 05-03-2017, 05:23 PM
  #137  
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,495
Total Cats: 1,636
Default

Fuel is not conductive. You just don't want bare metal touching. I used PTFE heatshrink with good results.
aidandj is offline  
Old 05-03-2017, 05:36 PM
  #138  
Ian
Junior Member
iTrader: (2)
 
Join Date: Jan 2012
Posts: 165
Total Cats: 4
Default

Originally Posted by aidandj View Post
Fuel is not conductive. You just don't want bare metal touching. I used PTFE heatshrink with good results.
Well sheeeiiiiiit. Thanks for the confirmation Aidan, I'll put it back together with the PTFE. Hopefully this will be useful to someone else as well.
Ian is offline  
Old 05-03-2017, 05:36 PM
  #139  
Senior Member
iTrader: (1)
 
Join Date: Dec 2010
Location: Farmington Hills, MI
Posts: 1,153
Total Cats: 152
Default

Originally Posted by Ian View Post
Apologies for the mild thread-jack - what did you use for fuel safe heat shrink on your in-tank rewire? I tried some PTFE heat shrink I found on Amazon, but it's not sealing completely. Given the intended environment, it's not work taking any risks.

TIA
Definitely don't use unrated heat shrink. I used rubber fuel hose and slid it over the crimp. Then I used the coiled stuff that goes over the wires from the factory to keep the fuel hose in place. You can also stagger the crimps to ensure they won't touch. If there's no possible way for metal to metal contact to happen, you technically don't need heat shrink, as long as the crimp is good enough that you don't feel you need strain relief. Gasoline is an insulator, and there is no concern of current traveling through it.
acedeuce802 is offline  
Old 12-09-2018, 03:34 PM
  #140  
Newb
 
Join Date: Jul 2018
Posts: 17
Total Cats: 0
Default K24 for a DD Miata?

Originally Posted by Kaustic View Post
well, I've been driving the car basically every day since the last update here.

Once I get my other car and can have this laid up again, I might start planning a ground up engine build, get it prepped and ready to drop in, then spend a weekend doing the swap. I'd love to have another 40 or so WHP at least.
I realize this thread is over 2 1/2 years old...
I'm just checking in to see how this K24 swap is working out for Kaustic as a DD.... I did send Kaustic a PM but have yet to hear back.

I have access to a very low mileage (32k) '08 TSX of known providence (my aunt's car was rear ended, thus totaled by her insurance co.).
Considering this swap for my 10AE with it's oem six speed and Torsen. Calif. CARB laws are a non issue, no worries there.
Now that David has worked out the a/c solution makes this swap feasible for me as I live in the hot toasty desert and a/c is a must have.
Andy Hollis recommended a manual rack as opposed a converted p/s rack. Andy thought the K swap was a great solution for a DD. When Andy speaks, God listens.
I have reviewed all the K24/Miata swaps I could find but I do have some questions.
This will be a 90% street 10% track driven DD. No autocross. Track is Chuckwalla in SoCal a relatively short track.
1) How are the K swap motor mounts for NVH on a DD? Comparable to the harder Mazda Speed competition mounts?
2) How are the under hood temps? I'll plan on a Swain coated (white lightening) street header, should I plan on hood vents?
3) I have a 32mm Koyo radiator with shroud and mishimoto fans, will that be enough?
4) ECU: Hondadata Kpro4 vs K24 reflashed....I'm leaning towards the reflashed ECU.
5) My existing 3.909 rear Torsen vs a 3.636?

Anything you K24 swap folks would do different for a street DD? I realize many K24 swaps are for dedicated track cars, but not in my case.

Thanks folks....

Pat Conlon, Palm Desert, CA.

Last edited by Pconlon; 12-09-2018 at 03:58 PM.
Pconlon is offline  

Thread Tools
Search this Thread
Quick Reply: K-swap How-to: A by-the-book K24A2 NB2 swap build thread


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.