NZ_87_TURBO

blew my motor on thursday night, wound the car and got to 245 kph and chickened out and once i slowed down and once i turned around the car stalled and never ran again.
pulled it out on friday night and stripped it back on saturday am and the whole lots totalled apart from the e shaft, the front plate, the sump, oil pump and nuts and bolts
pic below
Demon rotasport build, approx 3500km

jjwalker

3500km? Not much for a new engine, I'd be suspicious.

And by the way, why did they make your exhaust ports the size of a whale sharks mouth?

arghx

iTrader: (3)

I don't see a bevel on that exhaust port.

FelixIsGod29X

iTrader: (50)

+1

Your apex seals got chewed up and those exhaust ports look crappy.

j9fd3s

iTrader: (3)

the stock plugs are too hot....

levelzero

iTrader: (1)

That was the first thing I notices as well. I'm also not a fan of that shape of port as is is very hard on the apex seal. Oval or somewhat tear drop shaped are best imo.

rx7_FREAKKK

iTrader: (1)

250 Killa watt? For a second i thought you were talking about an electric engine...

NZ_87_TURBO

yea, lets put those exhaust ports down to a crappy engine builder. Why do you say the spark plugs are to hot? and whats better to run than stockers?

87 t-66

iTrader: (133)

run stock trailing plugs in all 4 spots

j9fd3s

iTrader: (3)

the race plugs are a better design, AND a colder heat range.

trooper001

iTrader: (7)

RotorBalls

iTrader: (1)

lol nice pics...always enjoy these types of photos

jjwalker

You have to insure the proper heat range though. Cold plugs make the car harder to start, and foul quickly, very quickly.

Oh, just to add, get rid of those housings. They totally screwed your exhaust ports up.

junito1

The apex seals got detonated hard didnt they? Mine chipped the apex seals in the same spot from detonation on my last motor.

2slow4stock

iTrader: (18)

+2 ^^^ on detonation

+2 on trailing's all 4.

j9fd3s

iTrader: (3)

that corner of the seal is the weakest part.

junito1

But its detonation that caused it OR was the apex seal getting caught on the exhaust port?


It makes a big difference.

Either the builders fault- exuats port theory
OR owners fault for not keeping an eye on the engines. -detonation theory

lastphaseofthis

iTrader: (8)

Dentintation. whats ur ems, injectors,mods? /tuner?

gxl90rx7

iTrader: (1)

/\ its in his sig, looks like he has plenty of fuel. the corner seal imprint on the rotor was a nice touch

lastphaseofthis

iTrader: (8)

Were did you see a fuel map? i must be blind, cause i didn't see any kind of proof he was getting enough fuel, besides, ignition timing is a major engine killer, even with OK A/f.

Load up maps from the ek6, if you can.

Nick_d_TII

iTrader: (6)

Do you know what brand of apex seals? Looks like damn near all of them broke, on both rotors, Huh. Exhaust ports are kinda ugly...

Did the turbo survive?

What's your plans with the car/motor? Bummer. Something wasn't right, obviously.

j9fd3s

iTrader: (3)

the broken seals are the symptom, the cause is detonation/preignition

NZ_87_TURBO

Brand new Bridgeport turbo motor on the way.
ign map
Fuel


Turbo is all good, infact i sent it away to get the turbine back cut.

Stock mazda 2mm seals