FC3S Murray's never ending build.

[RETed]

Originally Posted by Rotary Inspired

Ted I know you are big on tuning w/ the EGT gauge and one of the few I know of that are brave enough to use only the EGT to tune. What are you looking for in the logs of the EGT for the cause of this?

My thoughts on tuning with EGT here:
http://fc3spro.com/TECH/MODS/EL/GAUGES/egt.htm

I still don't like how hot the EGT's were, especially it's in the lower gears...

What are your thoughts on the cracking of plates. Everything I have seen points to a misfire which causes more strain on the block. I am wondering if the addition of the aux injection could have a cause on this. IMO there is not a huge need for aux injection at the 400 hp level. If you proceed upwards getting close to 500 is where it would be good investment.

If fuel was under control, it has to be ignition timing somehow...
Overly hot intake temps are basically out of the question, since aux injection was used.
Even misfires would register on the P-FC - unless the P-FC was malfunctioning and not showing true knock?

EGT's are still too high for under those conditions.
I would've liked to see them down in the 1300F range or even slightly lower.
I'm not an aux injection guru, so it's hard for me to confirm or dismiss the aux injection as a problem, but I always though the EGT's should come down due to the aux injection...

Do you mind posting your ignition timing #'s under those ranges?

Long shot...do you remember how much torque you guys put through the tension bolts when rebuilding?
Stock Mazda tension bolts, right?
Did you do anything funky with the adapter for the oil supply line to turbo in that same area?
Crush washer, right?
Approximate torque on the adapter?


-Ted

[project86]

Well from my memory when we rebuilt. we torqued the tension bolts to mazda spec. and in the correct order

sorry sean, dont mean to thread jack just tryin to help solve the mystery

[TitaniumTT]

I would like to see the ign maps and rough revs/boost at the time of the crack. I still say that the AFR's were too low. I don't like overly rich mixtures.

Besides, I need more ammo in my quest to convince some dumbass to change his mind about some bone head idea

[FC3S Murray]

^

Hate all you want Brian........I am not changing my mind lol.

[TitaniumTT]

I don't hate the idea of the engine, I just had a huge hand in one. I just think that rebuilding would at least let you enjoy the car WAY sooner. I mean, you're the guy that took what, 9 months to drive 1500 miles? I'll have a garage loaded with an FB, FC, FC vert, FD, and a 26b FD before you get done

As far as your goals for the car, yes, that engine does make sense to a point. You won't have any headaches or worries as far as the engine living a long happy life at that power. However, it will take years to get that unsophisticated lump of AL into the bay as cleanly as you have the damn good looking 13b in there.

[FC3S Murray]

Originally Posted by TitaniumTT

However, it will take years to get that unsophisticated lump of AL into the bay as cleanly as you have the damn good looking 13b in there.

HAHAHA I beg to differ my friend....see now I have a fire under my ass because I am pissed and RE-motivated. I give my self a year...year and a half tops lol.

[WE3RX7]

I read this the other day and didn't respond immediately. I'm sorry your iron cracked. I'd have to see a lot more info before giving my two cents, but it sounds like ignition related... knock isn't everything.

As for the choice of swap - to each their own, I just get saddened when RE guys are so quick to jump ship. IMHO its killing what the car is when you do that swap, but its not my car and I'll never do it... so more power to ya. Good luck with the next build.

[FC3S Murray]

Originally Posted by WE3RX7

I just get saddened when RE guys are so quick to jump ship. .

Are you shitting me dude?! I have stayed loyal for 7 years with 6 motors in that time frame. I should get a fucking medal or something

Like I stated earlier....at this point in my life I dont care whats under the hood......I just want to enjoy the FC.

[project86]

Originally Posted by FC3S Murray

Are you shitting me dude?! I have stayed loyal for 7 years with 6 motors in that time frame. I should get a fucking medal or something

Like I stated earlier....at this point in my life I dont care whats under the hood......I just want to enjoy the FC.

im gonna keep saying it..... you deserve some fun. and you have definitely put in some quality and frustrating time in the RE. I have to say that i have never been the biggest fan of the v8 swap but thats because most ppl that do it that i know of dont even know what the rotary engine is. It seems like its alway muscle car guys that think displacement is everything. you've thoroughly experience the rotary so thats not the case with you.

also, bottom line........

Your car, your choice. Nuff said

[djmtsu]

Sucks that the engine popped so soon. Look at mine. I had maybe 6 or 8 thousand miles on mine and it destroyed the front rotor bearing. For no good reason.

So I parted it out. (still have your SSR's though )

I tinkered with the idea that if I keep the RX-8 longer, and it pops, I would love to put an LSx in it. Problem is, the damn car is CAN, so I would have to re-do EVERYTHING.

Not as fun as an FC/FD swap.

[MaczPayne]

Damn, I'm speechless!

[FC3S Murray]

Originally Posted by MaczPayne

Damn, I'm speechless!

Yeah so was I the first 15 minutes after we pulled the car over.

It sucked balls for sure.................

[WE3RX7]

Not trying to shit you

And by no means am I trying to insult you... I'm just saying 7 years and 6 motors might be some really crap luck. I've had 4 engines (only popped one, two were crap and one was fine, I just sold it) in 10 years and after the last build I learned what to do better on the next one (thus the RE cosmo engine). I think you've got a great setup there and if you rebuild the motor one more time, either stud or pin it.. there is an obvious weak point.

With the experience you've gained in all the RE engines, you should be able to pull that engine out and tear it down pretty quick... give it one more shot You can have a solid RE engine much sooner then a V8. Sorry if I'm a hater... but I've always been a purist.


And for the record, I love V8s. In a truck. Or a boat.


Good luck on whatever direction you take man....

[Whizbang]

turbos are bad mmkay

[project86]

the day she cracked on us was the day my NA idea finalized in my head.......mmkkkaayy