K series Miata swap - Page 30 - 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 07-04-2014, 10:05 AM   #581
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,106
Total Cats: 48
Default

The exhaust switches sides behind the oil pan in front of the transmission.

In my opinion if people can't figure out fuel and coolant lines than they shouldn't be swapping engines as that's the easiest stuff
ctdrftna is offline   Reply With Quote
Old 07-04-2014, 11:32 AM   #582
Senior Member
iTrader: (14)
 
Join Date: Jan 2007
Location: Murfreesboro,TN
Posts: 1,275
Total Cats: 52
Default

Quote:
Originally Posted by thirdgen View Post
How does the header connect to stock Miata exhaust if the exhaust side of a K series engine is on the passengers side, and the Miata exhaust is on the drivers side?
The J-pipe shown in the picture runs under the oil pan and over to the stock exhaust location.

Midtenn is offline   Reply With Quote
Old 07-04-2014, 11:42 AM   #583
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

That's pretty wild. I'm still on the fence as far as pulling the plug on this swap.
thirdgen is offline   Reply With Quote
Old 07-06-2014, 09:04 AM   #584
Junior Member
 
Join Date: Feb 2012
Location: Quebec city, Canada
Posts: 122
Total Cats: 1
Default

Have you had any issues with oil temperature, with the exhaust being routed under the oil pan?

Once the car is sorted out, you'll get a call from me for sure...

Great job

Ben
bigben is offline   Reply With Quote
Old 07-06-2014, 09:26 AM   #585
Elite Member
 
Join Date: Apr 2010
Location: Newcastle, Australia
Posts: 2,638
Total Cats: 25
Default

Quote:
Originally Posted by Midtenn View Post
The J-pipe shown in the picture runs under the oil pan and over to the stock exhaust location.
Why not under the gearbox? Thats how I did it, even managed to fit all of the stock bracing over the crossover without modification or spacers.

Dann
nitrodann is offline   Reply With Quote
Old 07-06-2014, 12:31 PM   #586
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 444
Total Cats: 145
Default

Quote:
Originally Posted by bigben View Post
Have you had any issues with oil temperature, with the exhaust being routed under the oil pan?

Once the car is sorted out, you'll get a call from me for sure...

Great job

Ben
Call us any time, this setup has been sorted out for months. I wouldn't sell them if it wasn't.

No oil temp issues, lots of cars run headers under oil pans, including all B, D, and H series powered Hondas.
KMiata is offline   Reply With Quote
Old 07-06-2014, 12:33 PM   #587
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 444
Total Cats: 145
Default

Quote:
Originally Posted by nitrodann View Post
Why not under the gearbox? Thats how I did it, even managed to fit all of the stock bracing over the crossover without modification or spacers.

Dann
It could be done, but we wanted max ground clearance and are running 3" exhaust. The gap between the pan and trans have us more clearance than going under the trans.

What motor you running, with what size exhaust?
KMiata is offline   Reply With Quote
Old 07-06-2014, 12:37 PM   #588
Junior Member
 
Join Date: Feb 2012
Location: Quebec city, Canada
Posts: 122
Total Cats: 1
Default

Quote:
Originally Posted by K Miata View Post
Call us any time, this setup has been sorted out for months. I wouldn't sell them if it wasn't. No oil temp issues, lots of cars run headers under oil pans, including all B, D, and H series powered Hondas.
Thats true... My Honda days are far behind... Lol Thanks for the reply!
bigben is offline   Reply With Quote
Old 07-06-2014, 01:03 PM   #589
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,106
Total Cats: 48
Default

Do you guys have any idea if a rotrex will fit around the subframe/ mount area. (kraftwerks race kit) ? I can't decide what route i want to go with my setup (rotrex vs turbo). I have a lead on a engine, but I'm waiting for a reply to go look at it.
Attached Images
File Type: bmp rotrexk24.bmp (801.7 KB, 1495 views)
ctdrftna is offline   Reply With Quote
Old 07-06-2014, 03:44 PM   #590
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Quote:
Originally Posted by ctdrftna View Post
Do you guys have any idea if a rotrex will fit around the subframe/ mount area. (kraftwerks race kit) ? I can't decide what route i want to go with my setup (rotrex vs turbo).
Attached Thumbnails
K series Miata swap-5tf4c.jpg  
triple88a is offline   Reply With Quote
Old 07-06-2014, 11:46 PM   #591
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

I just scored a k24a4 (160hp/161tq, 9.7:1 compression). I could change pistons, head swap, intake, and make maybe 240whp in my Miata N/A with that motor...or I could just continue to run my BP w/ 2560 turbo.
So right now, my car gets about 29 mpg driven to work, and it should run low 13's in the 1/4 with that turbo...I'm also guessing it should put down something like 250whp/220wtq?
How would the k series Honda swap compare to what I have now? I'm all about a cleaner engine bay, and N/A power...but the lack of torque has me stumped as to how it would feel to drive it.
thirdgen is offline   Reply With Quote
Old 07-07-2014, 06:22 AM   #592
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,106
Total Cats: 48
Default

Your only gonna be around 180 ftlbs with the NA, but you will be loosing weight, and running cooler under the hood. If you have e85 in your area you can boost your power a bit with higher compression (13.0:1 +). I have no experience with how the power feels, but my friend is making 366whp with a k24 on methanol and he says it feels like a turbo car lol
ctdrftna is offline   Reply With Quote
Old 07-07-2014, 07:20 AM   #593
Elite Member
 
Join Date: Apr 2010
Location: Newcastle, Australia
Posts: 2,638
Total Cats: 25
Default

We used a 2.5" but the section that goes under the car and crosses over is a flattened 3" with the same cross sectional area of 2.5" which could easily be achieved with a 3.5" pipe flattened for a 3" system.

Dann
nitrodann is offline   Reply With Quote
Old 07-07-2014, 07:45 PM   #594
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,357
Total Cats: 1,322
Default

Quote:
Originally Posted by nitrodann View Post
We used a 2.5" but the section that goes under the car and crosses over is a flattened 3" with the same cross sectional area of 2.5" which could easily be achieved with a 3.5" pipe flattened for a 3" system.

Dann
Or you can run it under the oil pan, which is how OEMs do it.
Savington is offline   Reply With Quote
Old 07-08-2014, 12:28 AM   #595
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 444
Total Cats: 145
Default

Quote:
Originally Posted by Savington View Post
Or you can run it under the oil pan, which is how OEMs do it.
Yup. More than one way to do it, and customers certainly can build their own exhaust any way they want.

I like our solution. Works great, and the real clearance issue is where to put the collector. Since you have to already be at either 2.5" or 3" before you actually come off the side of the motor, its nice to duck it under the pan right away so customers can use the OEM exhaust routing.
KMiata is offline   Reply With Quote
Old 07-08-2014, 12:29 AM   #596
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 444
Total Cats: 145
Default

Quote:
Originally Posted by ctdrftna View Post
Do you guys have any idea if a rotrex will fit around the subframe/ mount area. (kraftwerks race kit) ? I can't decide what route i want to go with my setup (rotrex vs turbo). I have a lead on a engine, but I'm waiting for a reply to go look at it.
I think I emailed you back on this already... short answer is we don't know, but I do know that the K series A/C compressor does not quite fit. We need a test unit from Kraftwerks
KMiata is offline   Reply With Quote
Old 07-08-2014, 02:32 AM   #597
Junior Member
 
Join Date: May 2011
Location: Signal Hill, CA
Posts: 246
Total Cats: 11
Default

header looks amazing!
.one lane is offline   Reply With Quote
Old 07-08-2014, 06:10 AM   #598
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,106
Total Cats: 48
Default

Quote:
Originally Posted by K Miata View Post
I think I emailed you back on this already... short answer is we don't know, but I do know that the K series A/C compressor does not quite fit. We need a test unit from Kraftwerks
Yup you got back to me, Im not looking to reinvent the wheel to fit a supercharger, turbo it will be. This project is going to snowball as my projects usually do (tube front end car).

Im not sure of what turbo will suit what i want to do though 10-12 psi on 93 pump 375-400whp area. This car is a street car so im praying that 205 tires will save my transmission and burn up instead of breaking ****.

Anyone have recommendations for turbos ?

EFR 7163 + .85 a/r v band housing (twin scroll internal gate ? )
i worry about the gate being to small on these turbos to run low boost

GTX 3071R + .86 a/r Tial housing


most people on k series forums are running bigger stuff like gtx3582 , 6262, big efr's. I feel that these are to big as i want really good spool up and low end and reach the power i want.
ctdrftna is offline   Reply With Quote
Old 07-08-2014, 09:26 AM   #599
Junior Member
 
Join Date: Nov 2010
Location: Winchester, VA
Posts: 302
Total Cats: 3
Default

Quote:
Originally Posted by ctdrftna View Post
93 pump 375-400whp area....(tube front) street car ...205 tires....i want really good spool up and low end and reach the power i want.
Maybe I'm out of touch with current turbo technology, but I feel like you're trolling or something here....
stinkycheezmonky is offline   Reply With Quote
Old 07-08-2014, 11:01 AM   #600
Elite Member
iTrader: (2)
 
Join Date: Aug 2012
Location: Indianapolis
Posts: 3,325
Total Cats: 235
Default

Soviet's EFR hits 29psi somewhere around 4000rpm and made 458whp, not trolling in the least.
thenuge26 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 03:01 AM.