Miata Engine Swap
#41
They will build you anything you want, if you want a dash made they will do it. It is the same place that Sport Compact Car lost 154 lbs in exterior body parts.
http://www.modified.com/projectcars/...k/viewall.html
http://www.axispowerracing.com/miata.html
http://www.modified.com/projectcars/...k/viewall.html
http://www.axispowerracing.com/miata.html
#44
http://www.targamiata.com/tags.php?tag=weight%20loss
25 lbs with most of the metal still in place for a window crank, 14 lbs with maximum weight savings. The 14 lb door looks similar to moti's door. I think moti has a slight bit more metal on the bottom, but that stuff is light. I think Moti's door is probably no more than 2-3 lbs more.
We can meet in the somewhere in the middle and say 19 lbs for the average since most gutted doors don't have anything in the middle to allow for door bars.
#45
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Join Date: Oct 2011
Location: The Race Track & St Pete FL
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Price to Weight Savings
I am going buy PRICE/SUBTRACTION OF WEIGHT
Seats 63
Doors 66
Hood 100
Trunk 58
Lower the Number is better
#46
You are comparing an overweight gutted door with the carbon doors and an overweight FIA seat with factory seats.
You are being as optimistic as possible for the carbon doors, which are likely to get you the least amount of benefit.
a $700 fiberglass FIA seat will come in at 12-14 lbs, maybe 16 lbs with an aluminum mount.
Even the targa miata doors at 24lbs + 6 lbs for glass, will be under 32lbs (which you also need to add in the weight of the glass for the carbon doors).
You are being as optimistic as possible for the carbon doors, which are likely to get you the least amount of benefit.
a $700 fiberglass FIA seat will come in at 12-14 lbs, maybe 16 lbs with an aluminum mount.
Even the targa miata doors at 24lbs + 6 lbs for glass, will be under 32lbs (which you also need to add in the weight of the glass for the carbon doors).
#48
Ya 13b is not light
http://forum.miata.net/vb/showthread.php?t=338950
http://forum.miata.net/vb/showthread.php?t=338950
It would be nice to see a comparison of a 1.8 + 6 speed.
#49
Ya 13b is not light
http://forum.miata.net/vb/showthread.php?t=338950
http://forum.miata.net/vb/showthread.php?t=338950
In fact, I know a lot of rotary guys that have duo or even a few single wrestled the keg into the car. I don't see how it can possibly be that heavy. And yet, I know for a fact I have zero chance whatsoever to wrestle a bare Miata long block into the Miata...or even the larger RX7.
:headscratch: I don't know, but those numbers just don't seem right, unless the non-engine related stuff weighs a lot more than the Miata's.
*: Disclaimer, I was a lot younger then, and too broke to afford the proper tools at the time. I wouldn't do it now.
#50
Nev's rotary build showed a weight loss somewhere between 75-90 lbs (I can't remember exactly, I think it was 86 lbs).
I think thats pretty significant considering its coming out of something that you normally can't get significant weight loss out of. Plus Rotarys center of gravity is lower, which has other difficult to quantify benefits.
I think thats pretty significant considering its coming out of something that you normally can't get significant weight loss out of. Plus Rotarys center of gravity is lower, which has other difficult to quantify benefits.
#52
Threads like this make me laugh.
"Hey guys I'm going to build a super awesome monster with full carbon fiber everything and NOS and tons of power and and and..............."
Sounds like the typical pimple faced ricer retard in a wal-mart parking lot trying to look cool in front of a fast car owner.
"Hey guys I'm going to build a super awesome monster with full carbon fiber everything and NOS and tons of power and and and..............."
Sounds like the typical pimple faced ricer retard in a wal-mart parking lot trying to look cool in front of a fast car owner.
#53
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It's a bad idea.
IMO, putting an SR or a 13B into a Miata is a huge waste of time. Just build the 1.8L and turbocharge that. All of the motor mounts, trans mounts, etc. are all engineered for you. If you're going to go through all the hassle of an engine swap, do an LSx swap. It is the only engine that's worth the hassle.
IMO, putting an SR or a 13B into a Miata is a huge waste of time. Just build the 1.8L and turbocharge that. All of the motor mounts, trans mounts, etc. are all engineered for you. If you're going to go through all the hassle of an engine swap, do an LSx swap. It is the only engine that's worth the hassle.
#54
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What Sav said. And my money is where my mouth is.
If you want to do an LSx swap and keep the car near 2200 lbs then strip it to the bone, and use a T-5 instead of a T-56. The T-5 saves 70-80 lbs, but it is not nearly as durable as the T-56.
If you want to do an LSx swap and keep the car near 2200 lbs then strip it to the bone, and use a T-5 instead of a T-56. The T-5 saves 70-80 lbs, but it is not nearly as durable as the T-56.
#55
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Join Date: Oct 2011
Location: The Race Track & St Pete FL
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Thanks guys all I'm looking to do now is to sell my Z71 truck first, the 240sx and my dune buggy can stay where it is for now. I was running up the numbers last night and the 1.8 is going to be around $7k usd, so I will get the engine at the end of the season.
#56
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Join Date: Oct 2011
Location: The Race Track & St Pete FL
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Threads like this make me laugh.
"Hey guys I'm going to build a super awesome monster with full carbon fiber everything and NOS and tons of power and and and..............."
Sounds like the typical pimple faced ricer retard in a wal-mart parking lot trying to look cool in front of a fast car owner.
"Hey guys I'm going to build a super awesome monster with full carbon fiber everything and NOS and tons of power and and and..............."
Sounds like the typical pimple faced ricer retard in a wal-mart parking lot trying to look cool in front of a fast car owner.
#57
It's a bad idea.
IMO, putting an SR or a 13B into a Miata is a huge waste of time. Just build the 1.8L and turbocharge that. All of the motor mounts, trans mounts, etc. are all engineered for you. If you're going to go through all the hassle of an engine swap, do an LSx swap. It is the only engine that's worth the hassle.
IMO, putting an SR or a 13B into a Miata is a huge waste of time. Just build the 1.8L and turbocharge that. All of the motor mounts, trans mounts, etc. are all engineered for you. If you're going to go through all the hassle of an engine swap, do an LSx swap. It is the only engine that's worth the hassle.
reading MartinezA92's thread it seems there's room for a factory turbo motor option. mazda factory turbo seems the obvious choice. anything non mazda has a long way to go to account for the non-mazdaness deficit.
but if the LSx can do it, it can be done. f20c/sr20/13b has to be proven, until then its just talk.
#58
These are just questions, there is a chassis that is vary acceptable just like the S13 and S14 chassis, but I guess the swaps on the s13/s14 is more acceptable to better swaps than the NA/NB chassis. But yes I am asking as if I was in a parking lot asking a bunch of car people so questions. I am not some pimped faced ricer retard, I have had some semi fast cars, 1985 Camaro 500ci turbo, RB26 swapped 260z, 522hp Z32. I am just waiting to get out of this **** hole called Clovis NM when my second military contract is up then I'm going back to Tampa. But more to come on the build...
Its just that 99% of these kinds of threads usually end in OP just disappearing because they weren't even half serious or realistic when day dreaming about this uber kewl project of theirs.
Good luck.
#59
:headscratch: The quoted numbers don't seem right. I've solo-lifted a 13BNA rotary keg (Equivalent to a Miata long block, no accessories, tranny or manifolds) before*, and I was nowhere near as strong as the quoted numbers claim.
In fact, I know a lot of rotary guys that have duo or even a few single wrestled the keg into the car. I don't see how it can possibly be that heavy. And yet, I know for a fact I have zero chance whatsoever to wrestle a bare Miata long block into the Miata...or even the larger RX7.
:headscratch: I don't know, but those numbers just don't seem right, unless the non-engine related stuff weighs a lot more than the Miata's.
*: Disclaimer, I was a lot younger then, and too broke to afford the proper tools at the time. I wouldn't do it now.
In fact, I know a lot of rotary guys that have duo or even a few single wrestled the keg into the car. I don't see how it can possibly be that heavy. And yet, I know for a fact I have zero chance whatsoever to wrestle a bare Miata long block into the Miata...or even the larger RX7.
:headscratch: I don't know, but those numbers just don't seem right, unless the non-engine related stuff weighs a lot more than the Miata's.
*: Disclaimer, I was a lot younger then, and too broke to afford the proper tools at the time. I wouldn't do it now.
But for this power you would most likely use a 1.8 mx5/miata motor with a 6 speed. I feel like you would need a comparison of these 2 motors/gbox on the same scales to get a good comparison.
Edit: Unmentioned benifit of a rotory: BRAP, BRAP, BRAP, BRAP.
Last edited by Vilko; 04-07-2012 at 06:15 PM.
#60
Im taking a stab in the dark here. But do you think a lot of the weight is in the gearbox? I imagine a rx gearbox (which would probably vary in weight depending on model) would be stronger and heavier than a mx5/miata 5 speed.
But for this power you would most likely use a 1.8 mx5/miata motor with a 6 speed. I feel like you would need a comparison of these 2 motors/gbox on the same scales to get a good comparison.
Edit: Unmentioned benifit of a rotory: BRAP, BRAP, BRAP, BRAP.
But for this power you would most likely use a 1.8 mx5/miata motor with a 6 speed. I feel like you would need a comparison of these 2 motors/gbox on the same scales to get a good comparison.
Edit: Unmentioned benifit of a rotory: BRAP, BRAP, BRAP, BRAP.
There's no way a rotary keg weighs as much as they say, I've handled rotary kegs, 1.6s, and 1.8s - even the 1.6s are way the ---- heavier than a rotary keg.