View Full Version : 2.5 STI motor in a rx-8
Prosport Gauges
03-03-2009, 03:07 PM
How do you guys feel about this?
Think about it. low weight distrubution. Small motor but very powerful :)
Transmission might be a tight fit :(
Phoenix7
03-03-2009, 03:24 PM
Seems pointless to me, performance-wise...forget the fact that it's a boinger in a rotary.....
Why not go 3 rotor? The rotary is already a small engine and with a 13BT or 20B you'll bring the 8 to life.
If you're looking to be different then sure, why not...It has not been seen before and it's always cool to have something different.......if you're looking to liven up your 8 the go with a 3 rotor...seems like less of a hassle.
Prosport Gauges
03-03-2009, 03:38 PM
Because a STI block has alot of potential.
It can make WAY more power then a 13BT
85rx-7gsl-se
03-03-2009, 03:41 PM
Why not go 13B-RE or REW? 700-800hp 2-rotors are not unheard of? Or it you really want power, just go LSx with boost ;)
WE3RX7
03-03-2009, 03:52 PM
I wouldnt imagine the 2.5 would be better than an RE/REW... both can make 500+ whp... how much more do you want?
There is a guy in Canada doing REW swaps into an 8 for $15K turn-key. I'd imagine you could do it for under $10k if you do the work yourself and spend the other $5k on performance mods and you'd have a hell of a machine...
Phoenix7
03-03-2009, 04:02 PM
The earlier 13Bs are just as capable of 500+ hp....I don't advocate boinger swaps, but like 85gsl mentioned for rearded power go LSX instead of the flat-four.
Prosport Gauges
03-03-2009, 04:09 PM
Word! Thanks for the input.
classicauto
03-03-2009, 04:14 PM
FWIW, there was an STI with an REW in it floating around the aftermarket.
This could be the retaliation build :lol:
Prosport Gauges
03-03-2009, 04:16 PM
see how small it is :)
http://i57.photobucket.com/albums/g201/Ryan_west06/l_a50a150721a84a7ba3f2a925d3935518.jpg
http://i57.photobucket.com/albums/g201/Ryan_west06/l_2ccfb9326f9f4e4980283f509cc9d7ff.jpg
http://i57.photobucket.com/albums/g201/Ryan_west06/l_6396bfa319e942c694b8e6f573c84fb5.jpg
http://i57.photobucket.com/albums/g201/Ryan_west06/l_23181235fb71470899b9ec6e2048f2d0.jpg
Whizbang
03-03-2009, 05:21 PM
That is a real wide engine though...
Prosport Gauges
03-04-2009, 09:16 AM
ya :/
fire85gslse
03-04-2009, 08:08 PM
put that motor in a old school dastun/nissan/honda. That would be sweet in a old 510
djmtsu
03-04-2009, 09:45 PM
Actually that engine would be better suited in a VW bus.
Trust me!
fire85gslse
03-04-2009, 11:47 PM
no in a old school Subaru Brat 4x4 with the jump seats in the rear of the bed. :driving:
Whizbang
03-04-2009, 11:49 PM
JUSTY!
too bad a 26 horse briggs wouldnt even fit in that thing.
Prosport Gauges
03-05-2009, 09:07 AM
its not as big as you guys think! when the heads are off it looks REALLY small.
neit_jnf
03-05-2009, 10:00 AM
sits too forward in the chassis
djmtsu
03-05-2009, 12:46 PM
its not as big as you guys think! when the heads are off it looks REALLY small.
Too bad you can't leave them off. Lol!
Herblenny
03-05-2009, 01:57 PM
It would be interesting. I'm not familiar with 2.5 nor the potential of 2.5.
I do however think if you are going for power and piston, LSx is a far better choice. I've talked to Hinson in the past and I know they were interested in doing the LSx in RX8.. They asked me if I was interested.. but I'm not really looking for 400+ NA power and my daily being out of commission for 3-6 months:) Also, I think if I want pistons, then i would go buy a piston car and save me some time and headache :)
I've seen people do LSx in an FD and some after the conversion, just goes out and buys the real thing.. To be honest, it might be cheaper these days.
Proxy One
03-09-2009, 10:02 AM
I agree throw that thing in a Brat or a Old school Datsun or Toyota. That would be one hell of a sleeper especially if you had the 6 spd in there too.
You definately couldn't get the AWD system to work, unless you or someone you know is an INSANE fabricator. I've helped my buddy pull a couple suby engine while they are pretty tiny I think it may be to wide of an engine to fit in the 8's skinnky engine bay.
There is one guy who has been working on a swapping the SR20DET in his 8. It's been a long journey for him, still ongoing too.
If you have the money a three rotor and a big turbo can make insane power, but if your going to put a piston engine in you may as well to the LS swap.
Drama
03-15-2009, 12:07 PM
A Suby DOHC motor is not as tiny as your speaking of, They are quite wide even for the stock body of a STi. I`ve done quite of few sti conversions too stock wrx`s,. For myself to open the hood of a RX-8 and see a 2.5 dohc suby motor there. I`d be thinking there`s a hell of mechanic. And some crazy amount of dollars spent on doing something just to get it back on the road again. Unless you have a boat load of spare cash. Just put another stock style motor back in with some improvments within the motor it self. Cheaper than a crazy piston conversion. Even a LS1 is a thought I might would consider, If I had 15,000 spare dollars.
Drama
03-15-2009, 12:12 PM
its not as big as you guys think! when the heads are off it looks REALLY small.
Hell the heads is what makes the motor, without them it won`t breath. Your not going to put a short block in it.
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