Boost+shitty tune=BOOM

[joshnmn]

Glass half full of a drink of your choice

[gsxrturbo]

iF I was a guessing man you were running over 6500 rpms.which will throw rods.bad tunes and lots of timing break pistons not so much rods

[Rem0v3r]

7 psi and 11.4 afr is fine.. 18-21 degrees on pump gas is too much.. that coupled with matching low/hi octane tables probably did it..

Never let someone give you matching octane tables.. the low octane table is referenced when the car detects knock so it knows how much timing to pull.. just because the low table has say 9 degrees.. doesnt mean the ecu will give you 9 degrees if you knock.. it will pull timing by a % until either
1. Knock stops or 2. The bottom value of the low octane table is reached...

Also, tunes can be MAF only... however.. you should ALWAYS tune the car for speed density... if your maf sensor fails you want to be able to drive the car.. you also want to not blow your engine if it defaults to its SD tune...

[FasNuf]

^^^^^ This ^^^^

[eLeSthree]

Originally Posted by Rem0v3r

7 psi and 11.4 afr is fine.. 18-21 degrees on pump gas is too much.. that coupled with matching low/hi octane tables probably did it..

Never let someone give you matching octane tables.. the low octane table is referenced when the car detects knock so it knows how much timing to pull.. just because the low table has say 9 degrees.. doesnt mean the ecu will give you 9 degrees if you knock.. it will pull timing by a % until either
1. Knock stops or 2. The bottom value of the low octane table is reached...

Also, tunes can be MAF only... however.. you should ALWAYS tune the car for speed density... if your maf sensor fails you want to be able to drive the car.. you also want to not blow your engine if it defaults to its SD tune...

I would agree that 21 degrees is too much timing for 93 octane, with pretty much any boost and a SBE. If he ran E, and knew the risks of making power on the SBE, then 21 might be optimal timing. We dont know cause we didnt tune it.

As for the hi/low tables, that's not exactly how it works. Or I should say, there is more than one way to do it safely. My hi/low tables are exactly the same. Since I always run E, the Low table will never be used. But my timing values in both octane tables are really low. Like 10 degrees (@1.36gs). The rest of the timing comes from the several other adder tables like (flex fuel, alcohol, ect) to give me a total of around 20 degrees of total timing when the E is good and temps are in check. That timing wont be added if shitty fuel is used. The tune would revert to 10 degrees, essentially cutting timing in half.

My point is, you can't just assume by looking at those 2 tables that the tune is shit.

My tune will still pull timing if KR is detected.

We would need to see the data log to actually know what went wrong.

I'm not trying to defend his tune, cause I havent seen it. And it probably is not good. I'm just saying there are more than one way to achieve the same goal when tuning.

[FrankT]

It's my understanding that he was on 91 octane pump gas. VVE tables were not adjusted and were disabled.

[eLeSthree]

Originally Posted by FrankT

It's my understanding that he was on 91 octane pump gas. VVE tables were not adjusted and were disabled.

Yea, that's not good.

[RyangAsh]

Whicita, I have 2 good guess's. If it's the one I think it is, it is total irony.

[Rem0v3r]

Originally Posted by eLeSthree

I would agree that 21 degrees is too much timing for 93 octane, with pretty much any boost and a SBE. If he ran E, and knew the risks of making power on the SBE, then 21 might be optimal timing. We dont know cause we didnt tune it.

As for the hi/low tables, that's not exactly how it works. Or I should say, there is more than one way to do it safely. My hi/low tables are exactly the same. Since I always run E, the Low table will never be used. But my timing values in both octane tables are really low. Like 10 degrees (@1.36gs). The rest of the timing comes from the several other adder tables like (flex fuel, alcohol, ect) to give me a total of around 20 degrees of total timing when the E is good and temps are in check. That timing wont be added if shitty fuel is used. The tune would revert to 10 degrees, essentially cutting timing in half.

My point is, you can't just assume by looking at those 2 tables that the tune is shit.

My tune will still pull timing if KR is detected.

We would need to see the data log to actually know what went wrong.

I'm not trying to defend his tune, cause I havent seen it. And it probably is not good. I'm just saying there are more than one way to achieve the same goal when tuning.

I agree there is more than 1 way to skin a cat.. ive eyeballs a few tunes and seen different strategies tuners have used to get to the same value..

Props on the 20 degrees.. I know you err on the side of caution so I'm sure you got it figured out...
We all take a risk with our investment when we let a 'tuner' program our cars.. to me.. matching octane tables is a huge red flag... if I see it, im going to ask questions.... and weather or not it would make a difference, I would go behind him and take out 5-10 degrees no matter what he said lol

[smegal417]

My car puts 16° of advance in on 16lbs of boost at wot.

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[RealQuick]

Originally Posted by smegal417

My car puts 16° of advance in on 16lbs of boost at wot.

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When I was single turbo running SBE with 93 + meth... I ran up to 16psi at 15 deg

[IKILLEDSUPERMAN_ZL1]

The tune I had is definitely suspect. So after showing the tuner what others had concerns about with his tune he still says his tune wasnt the cause and it had no more then 15 degrees under boost. I mentioned that a SBE with low boost with my mods usually doesn't spit out rods unless the tune was jacked up.

[smegal417]

Originally Posted by RealQuick

When I was single turbo running SBE with 93 + meth... I ran up to 16psi at 15 deg

Yeah it's a single on E

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[gunchamp]

SBE in these cars are relatively strong. Anything can happen obviously, but you were extremely low boost. That tune almost for sure caused this. Sucks man. Its the reason i went with who I felt was at the top of the tuning game for this platform. Car may still grenade, but I know for SURE it wont be because of the tune