I ended up using a spare PCM I had and doing a write entire with the same tune I was using and it fired up fine and ran several times. So I'm thinking it was just a bad PCM. We will see I guess. I just bought a house so not sure how much I will get to play with it in the next few weeks as I move.

 

So I had Nate at Smoothflowpulleys.com make me some more larger pullies since he is who has been making them per my drawings since they are a custom design and I got those in today. They look awesome as usual so if you need a custom pulley made give him a shout, his prices are very reasonable.

Thats great, except what do you notice about this picture? Heres a hint, where is the smallest one?



This whole time I have been thinking I had my 3.1" pulley installed which is right at 10psi on its own, but it turns out I have had my smallest 2.7" pulley installed that is typically 15psi Whoops!

 

congrats on the new house .

did it stall like before when you switched pcm ?

i hope it's only pcm and it solved

 

I havent had a chance to drive it since replacing the PCM, so I dont know for sure but I feel pretty confident about it. Its not really a stall, its more like it just looses power or the computer shuts off.

 

Well new PCM did not fix the issue. I have no idea what it is. It acts like no fuel, but I have good fuel pressure, and I dont see something failing all of the injectors at once. In any event I got the truck working and took it to a different track yesterday. I installed an electronic pressure sensor in the exhaust before the turbo to monitor drive pressure instead of having it on just a manual gauge I dont have time to look at. Logging it through the fuel tank pressure sensor on the factory PCM. It is very interesting how quickly and how much it changes, I figured it would be pretty constant.

Ran 8 times at the track turning it up a little more each time. Last 2 I decided to put the front slicks on and try 4wd since the track was hit or miss. I replaced the factory front diff with an AWD one from an escalade last year in the down time, so not its just a pull of the manual tcase and its locked in, no waiting on the front diff actuator to do its thing. Setup worked very well.

Hptuners cracked out on the last run so I dont have good data from it, but the run before was pretty similar. Added 15mph to the 1/8th by the end of the night by messing with the boost, went from roughly 8.5 to 6.7 ET.


Again the P2.5 yellow line in section one is the turbo boost, purple line is total boost. The supercharger has a 10psi pulley on it. The third section green line, ExPr is the turbo drive pressure before the driver side turbo. The whole system is clearly very sensitive and will need a lot of tweaking with the controller to make it more stable. These turbos build boost a lot faster and easier than I thought they would. I can literally leave on as much as I want with the foot brake, still working up though. The final run was about 5-6psi with the turbos and 21-22psi total and went 6.7@100mph with a 1.43 60ft. I still havent touched the suspension at all and can easily spin higher with this cam.

Either way, im having fun! Made a bunch of runs and not any major issues. The issue is going to be heat for sure. So much crap under the hood everything gets hot, even with meth spraying IATs start at 140ish so barely any timing in it. Still pump gas and meth, and dont feel like upgrading all the fuel system to run E85.

Here is a video, turned out pretty well!

 

Looks like a blast. No helmet required at your local track?

 

Heh, well, not last night it wasnt I had it beside me waiting for them to say something but they never did. Typically they dont around here until 6s but still didnt say anything. Tshirt and shorts and tennis shoes also, but you have to understand the level of redneck at this place, it would blow your mind

 

Man it is starting to really make some suds! I sure don't want you to give up on this project even if it takes 2 yrs. You are a pioneer sir and I loved watching the run several times. Have to say though I miss the ladder

 

Oh I still have the ladder, it'll probably make a comeback next track outing, just wanted to get it semi lined up first. I'll probably find the limits of this setup pretty quick so we will see.

 

In the video thumbnail I thought I say those bowtie exhaust tips from AutoZone and I have to say I was disappointed that they were just round slash cuts

what kinda redneck are you?! 😂