If there were to be a rod bolt problem ... I would have seen it. 6600 shift points with 9psi, 6900 rev limiter bouncing on burn outs. Took the blower off and put in a wild cam, 7k shifts and 7200 rev limiter, still bouncing on burn outs.

Bouncing the rev limiter would be more stress than decel for sure.

I'm not buying the rod bolt theory. I think it ran lean and grenaded.

The MAF had to be maxed out in the 5k range, which means from there on, it's not adding fuel to compensate for more airflow. I think the damage was done on the WOT run, but let go on the decel.

I'm confident in saying the rod bolts weren't the problem.

 

It wasn't lean... I never even touch 12.1 to 1. I'm always running in the 11's for AFR. Lean has never been an issue for me.

 

You've got to be maxing the MAF out. Correct?

 

If you max the MAF out at 5K, how do you tune for 6K+ shifts?

 

Wideband.

 

A wideband isn't going to do anything but tell you it's running lean. Once the MAF flatlines, PE enrichment also flatlines. As the RPM's raise, there's still more air coming in the engine than what says the MAF. There is no cmopensation made for this additional air coming into the engine, resulting in a lean condition.

To tune for this, you mult by 3% at which point you begin to flatline. For example. If you start flatlining at 5600 rpms. You mult from 5600 up to the top by 3%. Go to the next cell and do the same thing. Do this until you get to the end. You can then go and make fine adjustments.

I know you have to be flatlining at around 5400. I was going flat at 5600-5700 on my 5.3 pushing 8 1/2 psi.

 

I see where you are going... and you don't know what you are talking about.

I maxed out the MAF on that combo in the upper 4800 rpm range. Beyond that fueling is tuned by wideband. The MAF has nothing to do with fueling beyond 4800 on my former combo.

 

Then please ... educate me since I don't know what I'm talking about?

 

wow, thats scary. i might have to think about going back up a pulley size or two.

 

And I thought this was common knowledge already...Forced induction guys have been worried about this for awhile after transition..High rpm kills bolts NA or FI....Fact is, the rod let go. I wish It was something impressive like lean condition.....then the rod might have actually lived...Now could have something contributed who knows.....WE don't tune for 3 damn percent more fuel after MAF maxes....We tune for 11.5 AFR across the board.....