FML right?

[HondaEat-R]

Yea I'm afraid to see everything when I get it apart. This threw a huge wrench into my FC build

It's okay, the FC can still do 75mph with only 1 good Apex seal, hahah.

I'm going to assume that the ring land is cracked as well, maybe not though..

 

[XoX1de]

Who tuned the car? what spark timing you have? whats the EMS?

 

[sean22306]

I tuned the car using split second. Timing would be whatever stock is supposed to be. The timing was set according to stock spec when rebuilt.

 

[XoX1de]

the stock timing is for STOCK boost, I run 11-12 while boosting 15psi, and its a GT25, Stock timing will be in the 14-15 range. which is too high...especially u run a GT28

 

[SeR_Cyclops]

Are you all saying he had predetonation?

 

[XoX1de]

Yes. Water injection would save the engine.

 

[sean22306]

Wouldn't that effect the engine as a whole and not just the right side?

 

[Crazee D]

Also consider the importance of proper oiling.
Get a DocB modified oil pump and external oil press adj. for these high boost builds.
Its a very worthwhile precaution.

 

[blkonblkMSP]

Were you running arias?

Yes

 

[blkonblkMSP]

the stock timing is for STOCK boost, I run 11-12 while boosting 15psi, and its a GT25, Stock timing will be in the 14-15 range. which is too high...especially u run a GT28

so wait, your saying change timing to run higher boost? srry bout the noob question, can one alter timing on the SS AFC?

 

[sean22306]

So would I adjust timing, use meth injection, or both to prevent this from happening again?

 

[HondaEat-R]

With meth you can advance timing. But you can run meth as just a safety net, or retard the timing at higher RPMS and boost levels for the same effect. If you retard timing, you'll lose power. So may be you should spray meth / water.

 

[yudkib]

i have minimal experience in engine tuning but i thought low comp pistons reduce the likelihood of predetonation...

 

[HondaEat-R]

That's the idea. I think 15psi on the 28rs might be too much without timing control. I was hesitant to say it at first, but it seems like the cylinder temps are just too high. I'm sure we'll figure more out as he pulls it apart.

 

[sean22306]

i'm just curious as to why its only one side of the engine. If predetonation was present wouldn't it effect all cylinders?

 

[yudkib]

i hope this is a really stupid question but what octane gas do you run?

...just checking...

 

[sean22306]

93

 

[thepope540]

Temps are related to many factors. I don't know a ton about the FS but in the BP world you had to run a dual feed fuel rail if making any power (feeding from both ends) because the cylinders at the end of the rail wouldn't get great fueling and would get too hot and burn up pistons. Oiling also plays a role as the oil pulls a lot of heat out of the metal- and oiling on the FS is known to be poor.

 

[Maxx Mazda]

My last 4 sets of Arias pistons did the exact same thing on cylinder #4. I run CP now.

 

[Maxx Mazda]

There is no such thing as "predetonation." It's either preignition (which it's not) or detonation (which killed this engine.)