epiphany swap so this idea for a swap snuck up on me last night. I have a buddy who has an S52 swapped Ti... it was my idea for him to get it and it is just awful...it sounds bad is always broken and the weight defies the point of the cars size. All in all, i hate my friends s52 swapped ti, it doesn't even feel fast. What i did come to love was my Mazdaspeed 3. Spectacularly fun car, i was hooked. I recently sold that and have been jonesin to go fast. My stock Ti is fried and i got to thinking...."what if i put one of those light and peppy Mazda motors, in this tiny, poised Bimmer?"that tought led to a few hours of research and i found what appears to be the perfect candidate. I propose putting a Wankel 13BTT into my Ti. The engine weighs in around 300lbs (400 with tranny and all the shiny turbo Fixens) puts out 255HP and 232 Ft/lbs TQ stock. I figure if some people wanna Go big and dumb(LS1) it might be worth a shot to go small and brilliant. i know i will need a new tranny, diff, gauge cluster, and ECU, but do you guys think parts like the radiator would suit the new motor? I know wiring is gonna be a btch, if you have some advice, please let me know |
M44 short block is 210lbs. S52 short block is around 300lbs. LS1 is close to the same weight as the S52. The weights are from bmwfans.info. Sounds like the wankel will be the same weight as the S52 swap. |
Sounds like a very interesting swap that would probably require a ton of fabrication both in the engine placement in the bay and the wiring harness. Built, the 13B is a beast of a motor and if it's balanced right, what redlines these motors generally is that you can't get enough fuel to them. 10-12K redlines are not unheard of and if it's built right- you're still making substantial power up in that range. Short of its weak points (apex seals; housing seals) the Wankel is great design. These motors bare weigh closer to about 200 lbs- what adds all of the weight is the turbo system and the other goodies. |
should be a fairly easy swap, the rotary is very compact. Though, after owning a few mazdas and a BMW, I prefer the mazda. Most Rx-7's end up with LSX's in them though. |
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I do agree, the wankels are cool engines. I honestly don't know much about them either but yeah, being compact will definitely help the position of the weight. Does your friends car have a proper suspension set up for the S52 in the front? |
i dont understand how a ti with a s52 is awful. i drove a M roadster with the S52 and is similar in weight and wheelbase as the ti and that thing was toooo much fun. it hauled ass too. |
Wankels are heavy expensive pieces of junk. Apex seals don't like detonation when compared to traditional piston type engines. Also don't be fooled by the 1.3 designation look at the combustion cycle. Hitler actually explains it best http://www.youtube.com/watch?v=zxsY4...layer_embedded http://www.motoiq.com/magazine_artic...-love-16x.aspx Both of my TIs will absolutely destroy a Mazadaspeed 3 at the at the track (drag autocross you name it). |
Lol, the Mazda Speed3 only makes 28hp & 44ft-lbs tq more than an s52 but the car weighs about 300lbs more than an s52 swapped ti. Throw an M50 manifold and a custom tune on the s52 and the power is matched. Not to mention rwd vs. fwd. The speed3 does have a 6 speed tranny, but the 5 speed is suffice for the s52. To each his own I guess, if you want to go through the hassle of reconfiguring a fwd engine and tranny to fit into a rwd car, more power to ya:wink: |
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google 13btt. I owned a Mazdaspeed 3, but thats not the motor im talking about, The Speed3 has a 2.3 MZR DISI The 3rd gen RX7 is the home of the 13btt A 1.3L Rotary, and is a rear wheel configuration....i may be a little overzealous about this project, but im not an idiot. also my speed 3 was pushing 320whp and 350ft/lbs @18psi(Smoked my buddy's S52 swap all day).....i would totally put that in a Ti if it werent transverse |
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but then again i threw a rod after i pushed the boost to 22psi and sold it XD |
Also guys, this isnt a Ti vs Mazdaspeed 3 thread.....i loved both cars and got a BMW tattoo on my chest for the Ti, so lets not make this about brand loyalty |
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