Maybe my wording, I just wonder why use the conversions when a direct Boost PSI reading is available? Specificly referencing my SCT GTX and BDX,

Or have I been wrong all this time? I can set it to read MAP and turbo inlet (baro), but why, when I have a direct readout of boost? KM

 

I think Livelink does it on the backend like Torque, but I could be wrong. I could look through my DMR addresses and see.

 

I edited the OBDLink PID for boost to allow less than 0 psi. (after being coaxed by my Wisconsin friend to view "vacuum" and monitor it's affect on fuel economy)

Sure enough, the PID shows -psi
I suspect that's vacuum affect on registering less than atmospheric?

 

I have heard arguments that vacum can not be expressed in negative PSI. Which misses the whole point that conversion is fairly easy to inches of mercury mathematically. I only have used SCT devices and the Live Link program for vehicle data. My tuner at BCB , setup both devices with his preferred data points. I got lost looking at the potential list of items logged and displayed. So my setup uses Boost PSI and the graph I posted shows -8 PSI at idle. KM

 

Just blew my 1/4 mile record out of the water. Yes it was on a slight downhill slope but I’ve noticed the truck isn’t any faster on a slight decline versus flat. If anything flat is usually a tad faster for some reason. Look at that DA! 8745’

 

Just blew my 1/4 mile record out of the water. Yes it was on a slight downhill slope but I’ve noticed the truck isn’t any faster on a slight decline versus flat. If anything flat is usually a tad faster for some reason. Look at that DA! 8745’ View attachment 190793
View attachment 190792

Wow it’s cool seeing the old posts and improved times. I’ve only had my truck tuned for 2 months and looking at draggy history is interesting. I was happy when I got into the 12s and below 4.5 0-60 now I’m at 12.02 and frothing to break the barrier of 11s and all my 0-60s are under 3.99.

 

Now duplicate it on the track, a flat one.

 

Oh I will. Weather is supposed to be pretty cool next week on Wednesday night. I’ll be there and hope to get an even better time than 11.89!

 

I wish you a perfect launch and a tailwind just light enough to still allow a qualifying time. More importantly, a truck that stays together and goes long and straight and is in one piece when it comes to a stop.

 

Thank you! I don’t intend to make countless passes on this tune. It’s fast, and it only needs to do it a couple more times before I put that tune away for good.

 

before I put that tune away for good.

As soon as you say it’s put away, I’m gonna start a pool on when it comes back out. 🤠

Best of success on the track!🏎

 

Hahaha thanks

 

Ill be heading to the track this weekend on E30 for a small friend's showdown. My Ecoboost and some big turbo/built Duramax trucks. Should be quite fun. Hoping for high 12's on E30.

 

I finally picked up a Dragy myself... And I get to back up my datalogs 🤘

 

My 2019 RCSB 2.7. The Dragy pass and the follow up drag strip visit. This is in complete street trim. No weight reduction, 34+ psi in the street tires, 3/4 tank of fuel, and ZERO weight reduction. The wheel hop is pretty severe. I just bought adjustable Viking rear shocks and I'm putting the truck on a serious diet this off season. I think I can shave 300 lbs off of this thing, go back early in the season when the air is better, run with less fuel and more track prep, and dial the suspension in and this time should drop substantially. I'll update the results this spring!

 

That's scootin!

 

Man, I need an aluminum 10 speed 🤣

 

2018 3.5 screw. 5550 lbs 4x4.
Let off before the 1,000 ft in the 12.99 slip.

 

Who tune and what is your tire size? very nice

 

Yeah, you can definitely tell you let out early. Your mph was too low for a full throttle 12.99 pass. It really is amazing what these trucks are capable of! Nice consistent runs!

 

Yeah, my quarter mph was lower than my 1,000! It coasted cause I was coming up on a small bridge on a country road and saw a car. Not bad for a truck weighing 5,550 at the time on 93 pump gas.

 

Yeah I saw that the mph had dropped. Could tell you were coasting.

I mean, a solid low 8 second (1/8th) vehicle, daily driven, on pump gas, over 5500 lbs, with 4x4, 15+ mpg, and all the creature comforts is just awesome. I don't mean to sound like an old geezer, but 20-25 years ago, FBO Fox bodies with cam swaps and slicks barely would do that! It's impressive the power these little motors put out!

 

Yeah I saw that the mph had dropped. Could tell you were coasting.

I mean, a solid low 8 second (1/8th) vehicle, daily driven, on pump gas, over 5500 lbs, with 4x4, 15+ mpg, and all the creature comforts is just awesome. I don't mean to sound like an old geezer, but 20-25 years ago, FBO Fox bodies with cam swaps and slicks barely would do that! It's impressive the power these little motors put out!

Yeah it really is man! I grew up around muscle cars myself. Brother and uncle both built them to sell and drag raced about every weekend and I never thought I would see a tune only truck running a 8.2 1/8 with that weight and everything else it has. Makes for a fun daily.

 

I believe I had some misfire issues on a couple tanks of Boostane, but I don't have any issues with an E20 belnd on a 91 tune.

I know plenty of others have used Boostane without issue, I have no idea the rhyme/reason, but might see if straight 93 resolves issue, or 93 with a little E85.

 

0-60 in 3.80
1/4 in 12.13@110.24

MPT E50 tune and AFE intake are only mods.

Next week will have XDI 35 HPFP, CVF intercooler, and E85 tune. Will update times.

 

Obviously a 3.5L, what year?

 

2019

 

Beat my best time, using e30

I was also testing to see if having the converter unlocked was any faster. It wasn't 🤣.

 

Blew a front hub so jad to get that fixed. Dialing in the tune now.

 

My persona best. Into 19mph head wind. Trying to find a place where I can actually do a peeper 1/4. The 60ft was 1.78 and spinning too much in 4high, first and second. Still have tires from dealer, 30k on them.

 

Turbo outlet pipes didn't help mine much at all, but the metal and silicone is less likely to burst at 20+psi 🤣

 

My best by .05, only thing different was tailgate down. Trying to find a proper place to get a 1/4 in. Still on factory tires with 30k on them.

 

Spare, seats, subs, amps, jack, loose stuff under the rear seat, in center console, and glove box, floor mats, bed liner. Experiment with lowering the tire pressure a bit for launches. Run it low on fuel (1/8-1/4 tank) and take full cans with you. Easily under 12.

 

Ya definitely, I’m pretty confident with a good launch, my better launches are under 1.79 and last nights 12.02 was a 1.85 launch. And slight uphill. I’m running tires at 30ish as it’s my daily. Didn’t see much change at 22psi. What is ideal psi?

 

Mine is full trim still. Spare, back seats, running boards and mud guards.... 🤣

 

Like my times to be as it sits daily commuting,,,,,,,,,

 

You know who you can roll or not that way.
My truck, stock power wise, 1/2 tank of fuel, all the daily commute stuff (probably a couple hundred pounds of stuff)went 5.6 0-60

 

Updated my tune, Mike at MPT has taken a liking to my mostly stock 3.5, cvf titan intercooler, K&n intake, turbo smart blow off valve and 91 prx MPT tune. On my 7th version. Verified Draggy slightly up hill I data logged an 11.98 1/4 mile 3.77 0-60 1.76 60ft.

Also on tires the truck came with on my 4x4 screw cab. No limited slip yet and fully intact interior with sound system. Detroit trutrack and some exhaust work coming next along with cvf charge pipes and moshimoto Tstat. Entering drag races in 10 days hopefully.