Spyder V6? - MR2 Owners Club Message Board
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post #1 of 28 (permalink) Old March 20th, 2019, 15:14 Thread Starter
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Spyder V6?

Kind of an odd first post to make for a forum, but here I am...

I've been doing a lot of reading on this forum about V6 swaps on MR2s, however, almost all of the information available is for the Gen2 MR2, while I have a Gen 3. The handling is great, as is expected, but the 1zz leaves much to be desired in the power front. A V6 swap was a pipe dream of mine until recently; disaster struck and now I'm down an engine. I've been looking into getting a replacement, but I had a thought: if I have to pull the engine anyway, why not do a swap? Of course, I could always do the same 2zz swap that other Spyders run, but I find the torquey V6s have much more allure.

With the introductions out of the way, my question is: Are there any major differences I should know if I want to cram a V6 into the rear of a Spyder? While I know it's possible, the lack of information specific to the Spyder is concerning.
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post #2 of 28 (permalink) Old March 20th, 2019, 15:23
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post #3 of 28 (permalink) Old March 20th, 2019, 15:55
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You'll find more information about this on Spyderchat.com - several documented swaps. On this forum Marco documented an early 2GR swap into a Spyder back in 2010/2011.

DDPR (DDperformanceResearch.com) offers some swap components.

Issues you face specific to this swap:
Mounting system.
Access panel for left bank.
Clearancing of the firewall and right strut tower.
GROUND CLEARANCE OF OIL PAN!!!!!
Boxing the lower member to clear diff housing of e153 OR s54.
Axle fabrication and/or rear hub swap.
Battery relocation.
Coolant system modification from surge to overflow/recovery.
Rear fender modification for wider tires.

PS. I almost forgot to mention a/c control, and instrument cluster control, and radiator fan control.

Last edited by merryfrankster; March 20th, 2019 at 16:01.
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post #4 of 28 (permalink) Old March 20th, 2019, 18:11
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Another alternative would be to use the parts i make to mount the EB60 in there. It allows the V6 to be mounted a fair bit higher but you have to modify the front firewall to make about 2" more room at the valve cover. Since it's a good idea to make an access cover there anyways that isn't necessarily a bad thing. It does avoid needing to cut any of the front frame member or the rear crossmember. it also gives a nice 6 speed transmission that is way more modern and shifts nicer.

The part that may be of particular interest is this: https://frankensteinmotorworks.squar...sion-mount-kit and this: https://frankensteinmotorworks.squar...ft-linkage-kit
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post #5 of 28 (permalink) Old March 21st, 2019, 17:03 Thread Starter
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in the interest of making the swap simpler, is the 1mz-fe any smaller externally than the 2GR-FE? I'd like to avoid modifying the firewall if possible, so a smaller V6, making less power, is still acceptable. This would also allow for me to make use of the original C56 transmission, as in my research, I believe that it can handle ~250 HP and ~250 lb*ft before it starts taking excess wear.

Last edited by SpyderJack; March 21st, 2019 at 17:07.
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post #6 of 28 (permalink) Old March 21st, 2019, 18:10
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If you're considering a lower power engine and you want something that fits better, can i recommend the 2AR-FE? here it is making 205rwhp (roughly 235hp)
Here it is on the track having fun:

It's a bunch of power and is a ton of fun to race. and as an added bonus almost all the parts you need to make it bolt-in are available: https://frankensteinmotorworks.squar...r2-spyder-shop I'm even finalizing the electrical stuff right now so in a few months at most that will be 100% plug and play also.
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post #7 of 28 (permalink) Old March 21st, 2019, 18:17 Thread Starter
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I'll consider it, but I'm mostly looking into the V6 for the sound and looks under the hood, It's something I'd love to be able to show off.
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post #8 of 28 (permalink) Old March 21st, 2019, 18:27
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No problem, I'm happy to answer any questions you have about the 2GR-FE or the 2AR-FE. I'll try to watch this thread but you can also reach me at [email protected]
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post #9 of 28 (permalink) Old March 21st, 2019, 19:27 Thread Starter
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No problem, I'm happy to answer any questions you have about the 2GR-FE or the 2AR-FE. I'll try to watch this thread but you can also reach me at
So, how hard is a 2AR to fit in the engine bay, exactly? Assuming no transmission changes, since my C56 is still running like new.
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post #10 of 28 (permalink) Old March 21st, 2019, 19:39
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As far as i know the C56 will not bolt to the 2GR, the 1MZ, the 3VZ or the 2AR. the problem is the starter is on the engine side and that interferes with most engine crank cases except for the small 4 cylinders.
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post #11 of 28 (permalink) Old March 21st, 2019, 20:15 Thread Starter
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As far as i know the C56 will not bolt to the 2GR, the 1MZ, the 3VZ or the 2AR. the problem is the starter is on the engine side and that interferes with most engine crank cases except for the small 4 cylinders.
That certainly throws a wrench in the plans. does the EB60 require crossmember modification?
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post #12 of 28 (permalink) Old March 21st, 2019, 20:30
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Originally Posted by SpyderJack View Post
That certainly throws a wrench in the plans. does the EB60 require crossmember modification?
No crossmember of frame member modifications required, that was a big focus in my swap parts that no chassis modifications would be required. there are a few spots on the firewall that do need to be massaged for a bit of extra clearance (right at the alternator plug and at the top right of the valve cover) and a stud also needs to be removed from the firewall.

You can also fit the 2GR with the EB trans but you have to either cut the firewall at the valve cover and make about 2" extra clearance or make all new mounts for the trans and cut the crossmember a bit to set it further back. That also makes the shift cables not reach so you would need another solution there also.
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post #13 of 28 (permalink) Old March 21st, 2019, 21:09 Thread Starter
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No crossmember of frame member modifications required, that was a big focus in my swap parts that no chassis modifications would be required. there are a few spots on the firewall that do need to be massaged for a bit of extra clearance (right at the alternator plug and at the top right of the valve cover) and a stud also needs to be removed from the firewall.

You can also fit the 2GR with the EB trans but you have to either cut the firewall at the valve cover and make about 2" extra clearance or make all new mounts for the trans and cut the crossmember a bit to set it further back. That also makes the shift cables not reach so you would need another solution there also.
Do you know how the external dimensions of the 1MZ compare to the 2GR?
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post #14 of 28 (permalink) Old March 21st, 2019, 21:12
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Unfortunately i do not. I expect they are very similar in size since they are the same style design and designed for the same engine bay so they were working from the same constraints.
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post #15 of 28 (permalink) Old March 21st, 2019, 21:26 Thread Starter
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Unfortunately i do not. I expect they are very similar in size since they are the same style design and designed for the same engine bay so they were working from the same constraints.
That was my fear. I'd prefer not to modify the existing frame or body, so my hope was that the 1mz would be smaller.

Do you know of any V6 engine of a smaller form factor?
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post #16 of 28 (permalink) Old March 21st, 2019, 21:27
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it kills me to say this but the honda motors are much smaller.
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post #17 of 28 (permalink) Old March 21st, 2019, 21:31
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Look up Blitzo's 1MZ swap on Spyderchat. I think he was able to get the engine in there (using an S54 or S51) without firewall mods. But he might have had ground clearance issues. I can't recall for sure.

There was once a 1.8 liter V6 available in the Mazda MX-3, IIRC. Unlikely to be worth considering.

Last edited by JimKing; March 21st, 2019 at 21:33.
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post #18 of 28 (permalink) Old March 22nd, 2019, 11:07
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Gouky, what's the weight difference between the 2AR/EB swap and the stock 1ZZ/C-series transmission?

And when is the Honda V6 swap kit coming for the MKII and MKIII? :-p
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post #19 of 28 (permalink) Old March 22nd, 2019, 11:10
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The 2AR/EB is 90lbs heavier than the stock drivetrain and significantly lighter than the 2GR/E153 combo (but i don;t have an exact number on that last one)

There are other people out there supporting the MKIII Honda market, i can't say that i'll ever do it but there certainly are no plans for me to do anything of the sort at the moment. Now that i have the ECU injector stuff worked out i need to work on boost for the 2AR and the 2GR before doing anything else.
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post #20 of 28 (permalink) Old March 22nd, 2019, 12:23
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I bought one of those cheap 300kg digital chain scales. I'll see what the 2GR+E(1)53 weighs before I roll it under my MK2.
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