Originally Posted by redsox
(Post 1337085)
Coming together nicely, and quickly. For coolant hose I don't see why more people don't run AN hoses it makes life much easier!
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1 Attachment(s)
Originally Posted by ctdrftna
(Post 1337113)
Not only does it cost more, it can be very problematic. I have used AN hose on my old race miata and on my Kmiata. And on both cars i fought with defects in the hose ends and warped flares from welding. I have had more leaks then i think i ever would have had with rubber.
Yes they look great and just unscrewing the line is nice. But when you buy $250 worth of fuel line and you have 5 leaks, it gets old fast. Now i run the aluminum seals on all my AN flares for good measure. And i don't buy the cheap summit brand fittings. I have even had issues with earls. My new favorite is fragola. I have XRP fittings to my Speed Factory tucked rad. https://www.miataturbo.net/attachmen...ine=1465445004 |
i have never had any issue from my assembly, i have had all manufacturing defects where the form the flare, or the o-ring on the swivel end. also when companies weld the AN bungs to the Rad, i have had those warped and not seal.
Nice looking swap, i was looking at a tucked radiator but i thought it wouldn't be up to the task so i went with the griffin. |
That was the original plan, have a Griffin made with the inlet and outlet both on the driver side but I got a deal on this rad and a local I know tracks his car many times a year with zero issues so I figured it would hold up.
I understand keeping price down is key as far as production, if I remember correctly Kmiata was going to make pre made hoses. Besides the look not being that great I would be worried about all those joints between hose and pipe leaking at some point. |
Just a heads up everyone - custom silicone hoses are on our list for development this year.
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That's awesome, takes away the guessing game of lengths and bends as well as potiental leaks from joints. Everyday the swap gets closer and closer to plug and play thumbs up.
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Originally Posted by K Miata
(Post 1337542)
Just a heads up everyone - custom silicone hoses are on our list for development this year.
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Quick video of the car. Lots of details to get sorted, but the fundamentals are there. Driver's door is off to run fresh speaker wire through the OEM door harness. Once the exhaust is built and the intake is finished, the motor swap itself will be done, and all the iron-copper-poly suspension bushings are in place. Just the audio system, carpets/dash, Elise Probax seats, and finishing details to go now.
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That was quick, whats the plan for an exhaust? I wish Kmiata offered an exhaust but I know that doesn't make sense production wise.
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You should just leave the intake like that :likecat:
jdm level over 9000 |
Originally Posted by redsox
(Post 1338060)
That was quick, whats the plan for an exhaust?
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Why ceramic?
--Ian |
Originally Posted by codrus
(Post 1338107)
Why ceramic?
--Ian |
Originally Posted by redsox
(Post 1338060)
That was quick, whats the plan for an exhaust? I wish Kmiata offered an exhaust but I know that doesn't make sense production wise.
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Originally Posted by Savington
(Post 1338106)
We will build our own. 3" ceramic cat, 304SS 16ga tube/bends, Magnaflow 12579. Hopefully it's quiet enough.
One worry that i had with this swap was sounding like the typical raspy tinned out honda. And with the XR-1 thats not the case at all. Everyone has there idea of what a street car exhaust should sound like. |
the big maggies sound excellent, MT approved for perfect sound every time :likecat:
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With the oil pump upgrade and the KTuner, looks like you're all set to rev that K24 to the 8000-8500 range. I'm working on a similar build, and am finding conflicting information about valve springs. It seems that the OEM K24 valve springs can't handle the valve velocity at those high RPMs. Folks are replacing them either with other OEM springs (K20, S2K) or with aftermarket Supertech or Ferrea. Is this something you considered doing when your valve cover was off? Or do you think it's not needed? Thanks.
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Cams and valvetrain are in the cards, but it will be as a 'stage 2' project. We didn't want to add anything more to the initial build.
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Thanks for the very quick reply :-)
How high do you plan on revving with the stock cams and valvetrain? |
I believe the K24A2 valve springs are very nearly the same as the F22 from the AP2, so I don't know why someone would do that. (S2K guys will put AP2 valve springs and retainers in their AP1 to help prevent valve retainer cracking from mis shifts). When I had this engine in my S2000, I had no issue revving to 8k with the exact same valve train setup, but the power levels off at around 6700 anyway without bigger cams.
The plan for the foreseeable future for this car is to rev to 8k, with springs/retainers to accomodate larger cams down the road. Much more than that, and you are putting a LOT of stress on the rods as the mean piston speed for this engine at 8k rpm is higher than the F22 at 8k and the F20 at 9k, which is definitely saying something. |
Originally Posted by linuxd00d
(Post 1338971)
With the oil pump upgrade and the KTuner, looks like you're all set to rev that K24 to the 8000-8500 range. I'm working on a similar build, and am finding conflicting information about valve springs. It seems that the OEM K24 valve springs can't handle the valve velocity at those high RPMs. Folks are replacing them either with other OEM springs (K20, S2K) or with aftermarket Supertech or Ferrea. Is this something you considered doing when your valve cover was off? Or do you think it's not needed? Thanks.
The real issue on rpm for a K24 is the bottom end. With the longer stroke (vs K20), the piston speeds get astronomical really quick. And that stroke puts a lot of side-load on the piston. The stock rod bolts also cannot handle big rpm. For a car that's going to see a lot of track use, 8000 is a solid practical limit for a stock bottom end. In fact, Hondata puts 7600 in all of its K24 base tunes. To go higher, the minimum is forged pistons and rods...which also allows you to get the compression where you want it. 12.5 is a solid practical limit for pump premium with a good tune. PS: All of the above is from lessons learned the hard way, as well as lots of research with real people, not just the internet. |
2 Attachment(s)
Adding to my post above, here's where I see the sweet spots for K24 builds:
1) Completely stock 06-08 K24A2, with bolt-ons, 50 VTC and tune on pump premium...typically makes 235 Dynojet in FWD applications (less for RWD). RPM limited to 8000. Massive torque! 2) Same as #1, but with mild cams/springs added. Makes 250 Dynojet at 8000 rpm. Gains are from 5000 rpm and up. 3) Same as #2, but with aftermarket rods and pistons, running on E85, 13:1 compression. 270 hp at 7600 and then drops, revs to 8500. Gains everywhere vs #2. 4) Same as #4 but with K20 head (or ported TSX head). 285 hp at 8000 and holds power to rev limit. Progressive gains from 6500 and up. For reference, the pic shows what a K20A2 (RSX-S) head does versus a K24A2 (TSX) head. PS: If you want reliable 300 hp, sleeved bored K25 is the way. But $$$. |
I agree with everything you stated above, hence my plan for a mild cam and valve spring/retainer setup. FWIW, the mean piston speed of a K24 at 8000 RPM is 26.4 m/s, which is N-U-T-S.
For reference, the most recent Formula 1 V8 mean piston speeds were 24 m/s at 18,000 RPM. |
Some good info there Andy. I'd like to see 250whp over the winter with a valve train and cams in my 04-05 but I know that's reaching. Might do some 09+ or aftermarket pistons too we'll see.
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Originally Posted by redsox
(Post 1339686)
Some good info there Andy. I'd like to see 250whp over the winter with a valve train and cams in my 04-05 but I know that's reaching. Might do some 09+ or aftermarket pistons too we'll see.
If you do 09+ TSX pistons with anything other than an 09+ head, you need to grind down the nubs on the one side to get proper piston-to-head clearance. Search on K20a.org for my posts on that topic. |
3 Attachment(s)
Racked the car today to knock out a few things. We got about half the exhaust built with a Vibrant flex and 3” cat. Waiting on a couple of tight-radius 90s to build the rear half of the exhaust.
Attachment 231862 FM frame rails installed: Attachment 231863 Intake cut down to size and installed (missing one hose clamp) Attachment 231864 It will come back over later this week to finish up the exhaust and get the sways/endlinks installed and set up properly. Once that’s done, it’s just the interior that’s left. |
Hey guys, any final build pictures? I know we are still playing around with a couple little things, but I think we'd all love to see the 99% finished product. Such a pretty and well-rounded build.
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Ive convinced myself to commit to the K swap in my 01 LS Miata. I can piss off my B series friends, And I know I'm not financially responsible for the LS3. My friend who has a Miata as well has been convinced to K swap instead of turbocharging the iron slug BP. Is 1600$ too much to spend on an 08 TSX engine ? Thats with no intake mani or exhaust and no trans obviously. Just moved back to NC so I dont have to worry about CA rules. If no one's routed the intake towards the windshield (cowl ?) I'll have to consider that
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Originally Posted by cyruss322
(Post 1353135)
Ive convinced myself to commit to the K swap in my 01 LS Miata. I can piss off my B series friends, And I know I'm not financially responsible for the LS3. My friend who has a Miata as well has been convinced to K swap instead of turbocharging the iron slug BP. Is 1600$ too much to spend on an 08 TSX engine ? Thats with no intake mani or exhaust and no trans obviously. Just moved back to NC so I dont have to worry about CA rules. If no one's routed the intake towards the windshield (cowl ?) I'll have to consider that
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Depends on mileage too, I paid 1600 for a 06 motor with 60k full long block with manifolds and wiring, minus ecu. Was 20min away from me.
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I live in NC and have sold a number of k20 and k24 engines. The last '06 K24A2 I sold for $1200, that was with ~130k miles but very good leak down numbers. That was with manifolds, injectors, coils, etc.
$1600 seems a bit high to me, unless it has extremely low mileage. You can buy a whole wrecked TSX for $1600...sometimes |
I just bought a running driving 03 RSX type-S last week for $2500 that was hit in the front. Radiator support, passengers fender, and hood is trashed, but it runs and drives just fine. It has a 05-06 motor in though...K20Z1, not the 03-04 K20A2. Detailed threads to follow from me when I have time to post a write up and photos.
Craigslist, man. Dime a dozen. |
Originally Posted by thirdgen
(Post 1353249)
I just bought a running driving 03 RSX type-S last week for $2500 that was hit in the front. Radiator support, passengers fender, and hood is trashed, but it runs and drives just fine. It has a 05-06 motor in though...K20Z1, not the 03-04 K20A2. Detailed threads to follow from me when I have time to post a write up and photos.
Craigslist, man. Dime a dozen. |
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Originally Posted by K Miata
(Post 1353352)
Good find, and the K20Z1 will work just fine too. You can sell that trans, axles, shifter box and cables, half shaft, etc for over $1000 alone.
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Originally Posted by K Miata
(Post 1351707)
Hey guys, any final build pictures? I know we are still playing around with a couple little things, but I think we'd all love to see the 99% finished product. Such a pretty and well-rounded build.
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Originally Posted by thirdgen
(Post 1353403)
Thanks, I actually spoke to you last week I think it was. I look forward to giving you my business.
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Originally Posted by thirdgen
(Post 1353403)
Thanks, I actually spoke to you last week I think it was. I look forward to giving you my business.
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18 Attachment(s)
Post 6:
Final update, just buttoning up loose ends. We got about half the exhaust built with a Vibrant flex and 3” cat. Attachment 231844 The other half is built out with a few tight-radius 90* bends and a Magnaflow 12579 (3" in/out, twin 2.5" internal chambers). It is OEM quiet at idle, near-OEM at cruise, and rowdy in VTEC. Attachment 231845 Attachment 231846 Attachment 231847 Nice and centered. Attachment 231848 FM frame rails installed: Attachment 231849 Intake cut down to size and installed (missing one hose clamp) Attachment 231850 On to the interior. This car was pretty ratty inside, even for 130k miles, so Andrew elected to go all out. Starting with a Blackbird Fabworx GT3 bar. This is the only NB bar that is glass-window compatible AND has a welded harness bar, so it's the obvious choice. Attachment 231851 All the HVAC goes back into place after the wiring is complete. Attachment 231852 New Pioneer touch-screen head unit with SiriusXM support, Spotify control, Bluetooth audio, and a ton more. I will bug Andrew to post more about the audio system if there's interest. Attachment 231853 We did a carpet kit from a company in the UK that included a full under-felt kit: Attachment 231854 And way nicer carpet than what originally came in the car: Attachment 231855 Tan Probax Elise seats round out the upgrades here. Attachment 231856 Outside the car, a fresh Robbins canvas top replaces the old worn-out vinyl. Attachment 231857 The new 8,000rpm rev limiter spawned a gauge upgrade from Revlimiter. Rx8-style faces with realigned needles, new 8,000rpm limiter, and the tach range expanded to 9,000rpm. Very OEM+ to match the overall build. Attachment 231858 After a complete cut/seal/polish/wax job, the car is now ~98% complete. There are still a few details to be ironed out (idle valve, A/C support, dyno tuning, possibly cams/valvetrain later on) but this is essentially the finished product. Pretty clean car, but that's what you get when you strip a car from the rear bulkhead forward and replace 80% of it :) PS: Props to those of you who can figure out what the license plate means :) Attachment 231859 Attachment 231860 Attachment 231861 |
3 lobes? It's a VTEC joke. My old D16Y8 had 3 lobes on the intake (or was it exhaust? stupid cheap SOHC head), 2 for normal mode and 1 shared lobe for VTEC mode.
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3 lobes refers to Andrew's little documented genetic mutation.
Nice job. Like the interior. Where did the carpet set come from? |
super clean. a+ excellent job
love the interior re-do |
Looks fantastic. Gotta be such a great car to drive.
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Pretty much the perfect OEM plus type build. Normally I don't like tan interior, but that's gorgeous.
Fantastic car! |
Originally Posted by Satisaii
(Post 1354889)
3 lobes refers to Andrew's little documented genetic mutation.
Nice job. Like the interior. Where did the carpet set come from? |
Originally Posted by emilio700
(Post 1354926)
Ditto. We need a carpet set like that here.
--Ian |
I really like that you stayed with tan. Nicely done on the whole car.
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Originally Posted by codrus
(Post 1354934)
SuperMiata carpet! :)
--Ian |
Originally Posted by Satisaii
(Post 1354889)
Nice job. Like the interior. Where did the carpet set come from?
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Sweet!
thx |
284 is reasonable considering what you get
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The important question: when can I buy it from you? Space and skillz for project cars is long gone, so I'll need turn-key. Stat! :giggle:
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Haha. I tend to hold on to cars for a long long time, so probably not anytime soon :party:
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Originally Posted by czubaka
(Post 1355010)
The important question: when can I buy it from you. Space and skillz for project cars is long gone, so I'll need turn-key. Stat! :giggle:
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Originally Posted by Savington
(Post 1355061)
We actually took this on as a test car for doing turnkey K24 swaps, so if you're serious, let me know. :party:
Only kinda joking. I've been casually looking for a cheap NC for when I get tired of daily driving the new truck, but this car is slowly pulling me back toward another NB. Nice work. :likecat: |
This car will also be in our garage at MRLS and giving rides on track if you want to see it up close. :party:
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Originally Posted by Savington
(Post 1355078)
This car will also be in our garage at MRLS and giving rides on track if you want to see it up close. :party:
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Originally Posted by x_25
(Post 1355082)
Bah! Not LHD NA sets :/
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Originally Posted by sp33der
(Post 1356206)
NA LHD complete set : COMPLETE LHD MOULDED CARPET SET - Newton Commercial
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