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Old 08-01-2007, 11:07 AM   #21
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apparently fe3s are now as cheap as Miata motors - $500
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Old 08-01-2007, 11:15 AM   #22
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I think an SR motor is a very nice option for a miata, its not like there's a 240 craze over them for nothing. Hell SCC is looking at putting the SR in their project SE-R which is the exact motor it came with in Japan, turbo and everything.

It's a very capable motor and can hold 350 hp far more reliably than Miata, for cheaper than the Miata. Is it cheaper for a block...no, but you won't need a new one in 5 months either. The idea of a stronger tranny is nice, and i've seen a very sick SR install in a miata.

I think it's good that people are looking at other swap options, just a different flavor for those who are stuck with our weak powerplant. Personally I think the CA18 motor would be far more suited to the Miata's characteristics, rev happy and ready to go.
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Old 08-01-2007, 06:33 PM   #23
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Other than hood clearance, why doesn't anyone put a 4G63 in a Miata? In stock form it can hold a hold a hell of a lot more power than all of the above and they've already been put in RWD applications. You could even make a simple adapter harness to run the DSM ECU.
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Old 08-01-2007, 08:46 PM   #24
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There are tons of other engines better than the B6 and BP. For most its easier to stick with whats in the car. How many here are anywhere close to max potential out of them anyways? I don't think we even have 5 members making over 300 whp. The SR swap is bad ***. The new trans is a big plus.
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Old 08-01-2007, 09:11 PM   #25
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is the transmission stronger? parts searches (iirc) shows similar manufacturers and some identical part numbers, at least for one of the trannies (look on m.net). I think there were debates over that or the miata 6 speed.

Is the SR better than the the miata BP I would not say that, better than the miata bp maybe (look at the Gt-R Familia). For the price though I dont know if its worth it. Especially if FE3's are in the 500's now, are you guys aware of the similarities in the dimension of some the FE3 components and the JZ motors. IIRC you can use the same pistons or rods. I forget what else my friend discovered when he did the first Miata FE3 swap that we know.


I'm sorry I just dont see the SR as being the end all motor people make it out to be. It was just a motor that help power and lasted a long time that allowed for a lot of development.

plus how many people have really spent a money trying to fine tune miata to make power and be safe with ECU's other than that that FM offers. Most of them do not post on online forums but I've see some very nice stuff come out of San Antonio Texas as well as Louisiana
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Old 08-01-2007, 09:15 PM   #26
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and actually that link is old, has been up for a couple of years i think
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Old 08-01-2007, 11:59 PM   #27
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Quote:
Originally Posted by jwarriner View Post
Other than hood clearance, why doesn't anyone put a 4G63 in a Miata? In stock form it can hold a hold a hell of a lot more power than all of the above and they've already been put in RWD applications. You could even make a simple adapter harness to run the DSM ECU.
I looked into doing th 4g63 RWD swap in a miata and I will one day when money is not tight. There are alot of issues with doing the swap the biggest is the tranny.

There are only two good options other then custom bell housing

1) rx-7 t2 tranny. great tranny but some issues arise. First you need a wide-block 4g63/4 which is a different casting then the 4g in 1g/2g dsm. Second you need a rare bell housing from 85-86.5 b200 with i believe 2.4l carb 4cy motor

2) dodge max tranny or d50. the tranny bolts up to a stock 4g63/64 but is not well known for hold alot of power and also is a cable clutch.

there was a person making custom bell housing to mate a w50 mark3 supra tranny to a 4g(narrow I believe) but they only made a small run of them.


Last you still need to swap or adjust parts ment for FWD setup
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Old 08-02-2007, 12:56 AM   #28
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The 4G63 has been mated to a GM PowerGlide many times, GM manual transmissions may also be an option along that same route.
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Old 08-02-2007, 01:30 AM   #29
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The end all 4cyl would not be Mazda or Nissan. Give me the SRT4's 2.4 or a Honda K series. I agree that the 4G63 also ***** all over most other 4 cylinders as AMS, Buscher Racing and John Shepard have all shown us.
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Old 08-02-2007, 01:52 AM   #30
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******* holler on the k series man. I would love to have a 2.4L K series Frankenstein built for boost. Those motors are unreal. Putting a k20a head on a k24 block and putting in some cams and people are making around 250whp all motor.
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Old 08-02-2007, 09:23 AM   #31
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Quote:
Originally Posted by jwarriner View Post
The 4G63 has been mated to a GM PowerGlide many times, GM manual transmissions may also be an option along that same route.
Busher has mated a powerglide but never heard of GM manual tranny yet. not sure if there is a different or an issuse with with GM maual tranny.

I also forgot there is still the front oil sump oil pan to deal with.

Quote:
The end all 4cyl would not be Mazda or Nissan. Give me the SRT4's 2.4 or a Honda K series. I agree that the 4G63 also ***** all over most other 4 cylinders as AMS, Buscher Racing and John Shepard have all shown us.
I am sorry the SRT4 engine suck.. A local lifted the head three times even with arp. Now this was when ARP was first coming out with head studs for the SRT4.

Also as for 2.4 vs 2.4 I would rather have the 4g64 instead.... mostly cause there is still more info and support for the 4g motors...last but not least srt4 motor is is a neon motor...lol

never had much run in with the K series but I have heard alot of good things about them.
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Old 08-03-2007, 04:28 AM   #32
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Quote:
Originally Posted by Pitlab77 View Post
SR motor is cheaper than a miata motor???? Please show me that, I can get miata motors for 500 that are working perfectly
Can you find a working Miata turbo BP..no

Upgrades are also much cheaper, and the tuning knowledgebase is 10x bigger than with the BP.

For 1/2 the price it takes to make 300hp on a BP, you can have a 400hp SR and make a fair amount back selling the old turbo setup. There isn't even a need to build the bottom end for anything under 450ish.

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Old 08-03-2007, 11:28 AM   #33
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sure whatever

Maybe you fail to take into account that fact that this is not the factory motor in the miata and it takes more than just getting a front clip.
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Old 08-25-2007, 08:02 PM   #34
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Quote:
Originally Posted by rob View Post
Can you find a working Miata turbo BP..no

Upgrades are also much cheaper, and the tuning knowledgebase is 10x bigger than with the BP.

For 1/2 the price it takes to make 300hp on a BP, you can have a 400hp SR and make a fair amount back selling the old turbo setup. There isn't even a need to build the bottom end for anything under 450ish.


Last edited by mazda/nissan; 08-25-2007 at 08:03 PM. Reason: oops was this thread really that old? it was up top so i replied oh well
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Old 08-25-2007, 08:09 PM   #35
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cool motors worth swapping into a miata:
4g63 (that would be so bad ***)
SBC
302
powertec v8

anything else is pretty ******* stupid.
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Old 08-25-2007, 08:11 PM   #36
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Quote:
Originally Posted by rob View Post
Can you find a working Miata turbo BP..no

Upgrades are also much cheaper, and the tuning knowledgebase is 10x bigger than with the BP.

For 1/2 the price it takes to make 300hp on a BP, you can have a 400hp SR and make a fair amount back selling the old turbo setup. There isn't even a need to build the bottom end for anything under 450ish.

apparently the club roadster people are invading.
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Old 08-25-2007, 08:12 PM   #37
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I was thinking cummins turbo diesel from a dodge truck.
That way my miata can tow its own trailer to the track.
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Old 08-25-2007, 08:16 PM   #38
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Quote:
Originally Posted by Ben View Post
I was thinking cummins turbo diesel from a dodge truck.
That way my miata can tow its own trailer to the track.
I lulled.
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Old 08-25-2007, 08:37 PM   #39
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What kind of power are these "high power" four bangers making? I think the max power seen on a stock block, forged rods/pistons FE3 is near 1000whp - Louis Lima's ute in South Africa. The engine just doesn't get any hype in the states because it was never imported... though very popular/common in NZ and Japan.
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Old 08-25-2007, 08:45 PM   #40
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GM ecotec--I recall 500 hp on stock stuff and up to 1500 hp with fancy moving stuff inside and bracing
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