'Murica

[HooWybrow]

Break all the things.

[M.Doban]

Alright, so here's the dyno graph. As you can see, both the horsepower (blue) and torque (red) flattened out at the veeerrryyy end. Boost pressure (green) also dropped sharply and the AFR (black) started to head north. This is all because the factory TCM started closing the throttle blade just before my dad lifted. The TCM will do this when it sees that the rpm is reaching the shift point faster than it should. It also does this to lighten the load on the trans during a shift.

So, before we can make a full pull, we need to get a Mopar TCM to raise the shift point and disable the throttle blade from closing.

That's all to say, "ignore that flat spot because it's actually a fake."

[philohlean]

This thing is absolutely amazing, and probably damn scary to drive. This thing is so many levels of badass it is almost impossible to keep track.

[subarooo]

The way you run your piping is incredibly clean... Thumbs fucking up dude, this is too awesome!

[Hondatom87]

WOW!

I wish I could see the video but the link isn't working... oh well

Fucking sick dude

[M.Doban]

It stinks that so much time goes by before another update comes along in this thread. My dad honestly doesn't get much time to run it on the dyno. Not his fault at all... but it's kind of a bummer.

Anyways, since the last update, we've made MANY pulls and the motor has stayed together. We've also got the street driving down in the tune. The converter wasn't stalling high enough so we swapped that out for a higher stall last week.

Last week while my dad was away in Alabama tuning several cars for another shop (one was a 1066whp 2010 Challenger), I threw the transmission back in the Jeep, buttoned it all up, and pulled it onto the dyno. Today I installed a two-step so we can build boost on the line without sitting on the converter. No videos of that because the camera battery died...but it sounds hairy.

Anyways, here's a third gear pull with the downpipe uncapped. In real life, it sounds pretty freaking gnarly.

http://s1054.photobucket.com/user/MicahDoban/media/MVI_0610_zpsb6f94235.mp4.html

[floatingdino]

It does sound gnarly. Do you have an accurate power reading with a full pull yet?

[M.Doban]

It does sound gnarly. Do you have an accurate power reading with a full pull yet?

We do. It's been detuned since the previous video as we wanted to actually have the engine stay together as we tuned it. In this most recent video it made 638whp. According to our fancy track calculators, we need to make at least 750whp to take the record for fastest stock-blocked 6.1 (the record is set by a MUCH lighter Challenger, so if we even get close it'll be impressive). The time to beat is 10.45.

[M.Doban]

Today was a memorable day on the OST Dyno calender. It was the first day we took the Jeep out on the road. As most of you know, it's been dreadfully cold and the roads have been a mess, but today was nice and the roads were clean. We hustled to install/connect a wideband to the Trinity so the AFR's could be monitored and logged. We also put the finishing touches on everything else and gave the car a good once-over before heading out.
Here's the video. The car is currently making 634whp at 11.5psi. Everything went flawlessly.

[D.Brown]

The quality of this build is amazing. Bravo.

[floatingdino]

that acceleration though

[M.Doban]

Wow, I haven't updated this in a while.

A lot has happened.

A big setback was roasting the turbocharger. My dad was told that a oil restrictor was needed. Apparently whoever told him that was wrong because when we sent the turbo out to Precision they told us that we were NOT supposed to use one and that the turbo suffered from oil starvation.

Another PT106 was installed but this new one had a slightly bigger compressor so some slight massaging to the core support had to be done. The bare aluminum compressor housing looks better anyways.

After the new turbo was on, it was time to get the Jeep ready for Challenger Fest 5. We had the goal in mind to break the previous "fastest stock-engine Jeep" record of 10.91. To do so we needed a killer 60-foot time. So what do you do? Add nitrous. After installation, it was set up for just a 75 shot but that was all we need to spool the turbo and get off the line.

There was a BUNCH of other little things that got done literally the day before we left. Before loading the Jeep onto the trailer, we messed with the tune a bit on the dyno. We needed more power to break the record and we needed to adjust for our switch to C85.
The final pull netted 720whp at 6100 rpm. My dad let off there to save the engine but that would easily be 750whp at redline.

That evening we loaded the Jeep onto the trailer and set out. This is at some random truck stop on the way to Kentucky.




When we got there, we cleaned and washed the Jeep and threw it in the car show.








Race time. Got some sticky tires and lightweight wheels on.




The first pass off the trailer we destroyed the 10.91 record with a 10.76 at 130mph! It was such an amazing feeling of accomplishment. We basked in that for a second. Just for a second though. We wanted to find the actual limits to the stock engine. Up the boost went. However, it was just too much. The second pass out the Jeep threw a rod (probably more than one) partway down the track. The logs showed that the motor was already coming apart before it hit full boost of 25psi. Heck, the rods may have already been bent on the first pass from all the dyno pulls we did. Who knows.




We pushed it on the trailer and basked in glory. It was a great and extremely successful weekend. Everybody absolutely loved the Jeep. I had a blast and can't wait to see what 1,200whp will do in this thing!

Thanks for reading, guys. This will be the last update for a bit as I have some other customers to take care of before the built motor goes in. I'll try to get some pictures of the nitrous and carnage later on. It's been real.

[P78]

badass jeep, always enjoy the updates

[hinrichs]

sucks about the stock motor, but congrats on breaking the record.

[floatingdino]

wreckin motors an rurnting strips