Beewst. Different story.

Strokers are antithetical to boosted performance. I don't need the stroke, just the RPMs.

Anyway, I already have the 2.0, so the point is moot.

When it happens.

I have other projects on the board to get done first, not least of which is the Renesis swap in our 1st gen RX-7 racecar.

 

see, you post a reasonable reply or two and then all teh rotardedness really starts

I pulled the engine data off the web and in typical fashion there are different threads with different numbers, including the Renesis weight on this site (anywhere from 275 - 305# dressed)

Same for dimensions, there are at least a dozen threads on this forum asking for Renesis dimensions and they are nothing more than the usual multi-rotarded replies on everything under the sun but the thread topic.

If you want to know accurately, then measure it yourself rather than trust the usual forum wahoos who more often than not parrot misinformation is the only real answer.

 

oh, and prior to the GTX release I believe there are 3076R dynos as well as different turbine A/Rs posted on s2ki.com, power can be made a lot sooner and stronger down low, but the top end drops down to a measly 430 whp range

 

Always.

Here is the actual motor. The length from bellhousing to pulley is 19" The height from oilpan to valve cover is 25"
The Renesis is 19" from bellhousing to pulley and 21" from oil pan to oil cap. There is 25" inches of clearance from oilpan to the hood liner.

I will be using a custom oilpan on the F20 to increase clearance.

It is also useful to note that the s2k uses the exact same Showa power steering unit as the RX-8.

Both engines (undressed) took slightly less that hernia-inducing strain on my part to lift from the floor to the motor stand. The RX-8's intake manifold is bigger, heavier and more complex than the F20's.

 

Do you plan on mounting it at an angle like how it is in the S2000? You will gain some clearance by doing that (which I'm sure you know).

 

Yeah, that is how it is designed, so that is how it will be mounted.
It'll have a different sump, though.

 

well even a stripped Renesis still weighs 185#, so you must have bulked up since the last time I saw you ....

 

Jeff,

What is the difference in the engine's output shaft location compared to the Renesis? Doesn't the Renesis's output shaft sit more toward the middle (vertically) than the F20? (or any other piston engine) You may have an inch or three clearance under the hood using a shallower pan, but I'd think that a measurement from the oil pan to the output shaft and the output shaft to the oil cap would also be needed to measure the real clearance, unless you 'lower' the transmission and driveshaft angle.

More curious, because I know the reverse issue is is one of the challenges for rotary swaps into Miata's

 

the issue is the firewall to valve cover clearance. The Renesis is much shorter in the rear area and stuffed under the firewall.

The reverse issue is because non-rotary cars have shallower trans tunnels relative to the rotary engines high rotating C-L. The trans will sit lower with a piston engine in a rotary chassis is all, might need to alter the shifter length at most

 

Agreed, lowering the transmission is one possibility, if there is clearance. Not sure how much clearance we actually have to lower the transmission farther. Most Miata rotary swaps (for NA/NBs) that I have seen have reworked the transmission tunnel to raise it up, usually because of the level of effort/complication of that vs trying to get the rotary to sit low enough to avoid it.

I'd just expect that putting a piston engine in a rotary chassis would require the engine either sitting higher, or trying to lower the transmission. Both have their own challenges and issues.



As I was typing that. I had a funny mental image of Jeff's 8 having the top ~4 inches of the S2000 engine sticking out of the hood like an old school blower (I know that won't be needed here)


Anyway, just more a question for Jeff on which approach he will be taking for it, or if it is actually needed at all and the position of the engine's output shaft is close enough for it to work.

 

if you look at the pics posted above, if anything the OE oil pan sump would hang way down below the subframe (crank center to oil pan bottom is much longer than the Renesis), but he posted about making a new sump for it

 

any updates? I'm seriously considering this swap myself and would love to see how this is going.

 

I wouldn't even be diving into it until early next year because of scheduling constraints.

 

stop being such a wuss Jeff, dew eet!


<runs for cover>

 

Look forward to see what happens with this project!

 

Also looking forward to a build thread!

 

Denny, I thought the L3 MZR 2.0l used in the Miata from about 08 and current Mazda 5 has "forged internals"??

 

Only the crankshaft, which is the least important part to be forged in an FI engine.
The cast pencils and the pistons are paper-thin cast aluminum.

 

Don't even mention the FS-DET in my MSP that I traded for my 8. Chandelier glasses would be a better description for the rods.

 

FS-DE = Ford Sucks-Dick Engine

 

Back toward the s2000 swap, Im seriously considering doing this, what would be the biggest problems to overcome on this? would the engine fit in the engine bay?

Ive never done an engine swap before but I do have decent experience (stripped 2 rx8's to chassis and fixed up another) Im just trying to get an idea as to what Ill need.

I assume what Ill need is the ECU and the engine, what else would be needed and how would I work the wiring? would I need to replace the whole electronic harness?
I guess the biggest thing that worrys me would be the electronics...

 

My buddy has an FC with a 302 in it. Its a quick car for being NA. We get it sideways no problem, very fun!

 

You're going to need alot more than just engine and ecu including some custom work. Also have to include whatever your state requires in order for it to be legal.

Ex: CA requires the motor, transmission, ecu, and all emissions related items to be used from the motor which would be a bit of an annoyance.. Plus it has to be from the same year or newer than the the original cars.

 

I think the biggest issue is steering rack clearance and maybe you need to relocate its position. About transmission tunnel issue, maybe its still ok.. an F20c is just a bit higher than SR20det. I've attached a couple of picture about rx8-sr20 swap from net and I think its highly possible to do with f20.
anyway.. have luck!!!

 

any updates???