Michigan Rotary Club
Generation Specific => 2nd Generation Specific => : RX-7racer April 26, 2011, 08:32:38 PM
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soo about a week ago i picked up an s5 n/a engine with roughly 60000 miles on a rebulid, transmission, driveshaft, ecu, and harness for $375. Engine was really dirty but seems to be in good condition otherwise. Unfortunately converting completely to s5 involves more than what i have and the cost to obtain the rest is to much right now. So i did some research and found that i can swap in just the s5 block, manifolds, and fuel rails (the main parts improved from s4 to s5) as long as i retain the s4 throttle body w/TPS, s4 ecu, AFM/intake tube, OMP (which im gonna remove to run premix), wiring harness with injectors, and front cover with water pump. While i have everything apart im going mad cleaning everything to make it look near new and fixing any broken lines and replacing all the vacuum lines and removing emissions stuff/ installing appropriate blockoff plates. Also im gonna get the atkins aux port sleeves (better flow) to replace the carbon crusted stock sleeves. as of right now i have it stripped down to the block. ill be reassembling everything after its all clean and i get all new gaskets, vacuum lines, and fuel lines (removing vacuum rack for emissions)
so thats my story as of now.
but i do have a couple questions. anybody know of a good carbon remover? and also with my current pojected setup what kinda power do you guys think ill be making? im hoping for about 170-175, but thats prolly a reach with a 60000 mile motor, stock exhaust and s4 electronics.
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I have had pretty good luck with Sea Foam........ available at most auto parts places.
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do the parts need to be soaked in it, or can it be sprayed on and scrubbed away after a few minutes?
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you can spray and scrub off after a bit
for the inside.
take the plugs out, fill the chambers by manually turning the crank, let it sit for a bit, put a little bit of 2cy in there, crank it again, put the plugs in and "here comes smokey!"
;D
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This could be a "good" thing or a "bad" thing. I've seen seafoam work on a rotary engine as well as completely destroy one. The main focus of seafoam is to remove carbon correct?? Well after years of cycles that same carbon build up is more than likely holding your apex seals in their place. So the carbon in that case is actually working in your favor. Now if this engine has 60,000 original miles on it then "me" personally wouldn't do this because that means the engine has been sitting around collecting carbon deposits, I would just let the engine do its thing. Now, if you are taking apart the entire engine and are rebuilding it then by all means go for it. Not trying to scare you but I have seen this happen first hand. It's your car. Like I said there is a good and bad to everything...
Just my 2 cents
Good luck bro, keep us posted
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the engine itself has some 120,000 miles on it, but it was rebuilt roughly 60,000 miles ago with new apex seals and rotor housings. but it has beeen sitting for a few years as well. i can see inside the housing and the rotors dont have to much carbon as far as i can see, most of the carbon i wanna get rid of is in the LIM, but i also wanna clean up any carbon internally if i can do it safely. i read about doing water injection (basically running water into the intake via vacuum lines) once the engine is running to remove carbon, but im not so sure right now.
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Don't do anything, seriously. Seafoam is bad for rotaries. I ran it in mine and my car ran like shit for a good month. If you want to do anything to remove carbon just rev the bag out of the engine once a week.
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im just gonna use sea foam for the manifolds and the 5th and 6th port sleeves. Internally i dont see much carbon. That engine will probalbly see redline several times a week soo internal carbon isnt much of a concern. The LIM, which had qutite a bit of carbon in it, however wont get cleared when redlining. That is where i found most of the carbon when i stripped down the engine.
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intake all cleaned up, TB ported
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that looks great. I have an engine that needs a good cleaning that i just got, want to clean it for me? lol
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that looks great. I have an engine that needs a good cleaning that i just got, want to clean it for me? lol
lol i barely have time for mine.
heres the block all painted and lookin pretty (well at least for a 60,000 mile engine)
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That looks pretty
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got a shit load of gaskets and misc. parts from mazdaspeed
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heres the block with water pump installed, almost getting there!
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Got my summit rpm switches for the VDI and 5th/6th ports, and a digital water temp. and oil pressure gauge with a dual gauge pod... evetually gonna get everything put together!
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gauge pod pretty much installed, just mocked up for now until i have time to route the wires and put the interior back together
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looks like progress.
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looks like progress.
its getting there, only a matter of time
gauge pod and gauges installed ready to be wired up when the engine is dropped in
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Custom heat shield i made to hopefuly keep intake temps down. too poor to afford a header right now so stock manifold for now. dropping the engine in tomorrow and hopefully getting it running soon after!
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FLYING MAZDA!!! ;D haha
engine/transmission installed, almost done just gotta make time to finish assembling the intake and installing the radiator plus all the fluids and what not :p
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made myself a custom weighted shift knob out of 1 1/4" stainless steel rod, came out pretty nice IMO. still chipping away at finishing the engine install, a lot of small time consuming stuff to get done, ughhhh....
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that looks nice.
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Nice, garage.
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Mazda's brand name rotary cleaner. Zoom zoom or whatever is like exactly the same formula as sea foam. The deal is mazda turns the oil pump wide open when doing this to make sure the sea foam doesn't dry out the motor. When you do it manually you need to add 2 stroke or idemitsu lube to it. You can google and find the procedure. Oh hell here it is http://www.rx8club.com/showthread.php?t=142852&highlight=sea+foam (http://www.rx8club.com/showthread.php?t=142852&highlight=sea+foam)
Done it and seen it done a few times. I've had good results.
Don't do anything, seriously. Seafoam is bad for rotaries. I ran it in mine and my car ran like shit for a good month. If you want to do anything to remove carbon just rev the bag out of the engine once a week.
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you wanna make another one of those heat shields? I'll buy one
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i would if i had an engine out of a car to fit it to. it was a pain in the arse to fit it properly (a lot of take on and off to trim t to clear the intake) and the engine must be out of the car to install as well.