Prodigy Performance 3.6 Turbo DIY Install

[JeepLab]

MOAR BOOST!

I think I may have finally solved my exhaust leak. I installed a new "header" gasket (where the exhaust pipe mounts to the exhaust port of the engine) on the driver side where I had a stubborn leak. I now have seen boost peaking in the 8.0-8.3 psi range! Previously, I was only getting up to the 7.8-8.0 range. I seem to be on par with NOLA with boost numbers now. The highest I saw today was 8.58 psi in 4th gear. I wimped out at 120mph, but it was still accelerating.

Even better than higher peak boost is that I'm building boost a bit earlier in the rpm range now.

In 2nd gear:
1 psi at 2250 rpm
2 psi at 2600 rpm
3 psi at 2800 rpm
4 psi at 2900 rpm
5 psi at 3100 rpm
6 psi at 3300 rpm
7 psi at 3500 rpm
8 psi at 3900 rpm

I need to get a nice clean data log of a 2nd gear pull to create an updated boost curve chart...

Keep it coming!

[UselessPickles]

Keep it coming!

As you wish!

I got a nice clean data log of a 2nd gear full throttle pull. Here's my new boost curve:




And here it is compared to my boost curve with the exhaust leak:




Lesson: Make sure your exhaust system is leak free when you have a turbo, or else you'll be missing out on power and turbo response!


And for a fun comparison, I found this dyno chart of a RIPP supercharged 3.6 Wrangler, with a boost curve. Notice that the boost curve is not actually linear. It seems to be a shallow exponential curve. If it was linear, it would have 5 psi around 3250 rpm (half peak boost at half peak engine speed), but it doesn't actually reach 5 psi until 4600 rpm!