#439 build thread
- Thread starter core-rider
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I agree with most everything. I started with Pimpxshift and now have a Holley system. I have also tuned with a Tweecer, SCT pro racer, and Quarterhorse. For most part the main stuff is the same. It really only took me a few days of going over the Holley software to get a good idea of what everything does. Now I could see a tuner that does a ton of work with Holley not wanting to work on megasquirt stuff and vice versa. They are heavily vested in that software platform and to switch up will slow them down which costs them money. So if they usually charge say $400 for a tune with Holley and megasquirt takes them 3 times longer because they aren't used to the software then should they charge you $1200? The customer will probably say no thanks... I'm betting they have gone down that road a lot and now they just say they will only deal with the one platform. I will say I prefer the Holley software having used both it and megasquirt. Better interface all around and the inputs/outputs are much easier to set up.
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Tuner Studio definitely has a learning curve, to me it was always "different" usage-wise. I've looked at Holley and I can see the appeal of how it's very straight-forward and a bit more intuitive. I will say the Haltech software is NICE, but it can also be overwhelming with how much it can do, it's kind of a cross between all the things you can do in Tuner Studio (and more), but with a much nice interface
I've tuned a couple of my neighbor's projects on the Holley. The software is slicker, which you'd expect from a big entity like Holley. I'd certainly run their stuff if I needed all of the supporting hardware. My feeling has been that PxS is an excellent solution for up to about 1000 hp, and the nearly-plug-and-play aspect (and cost) is awesome for milder applications. Beyond that, you're starting to need some ignition behavior that the basic MS3 hardware CAN support, but it's all built into the Holley, and works plug and play with the Holley hardware, so it just makes more sense.
That said, because my RPM requirements are low, if I had the bottom end to support it, I feel pretty certain I could sneak the red truck past 1000 crank hp on the PxS, especially once I get the CNP hardware on it.
That said, because my RPM requirements are low, if I had the bottom end to support it, I feel pretty certain I could sneak the red truck past 1000 crank hp on the PxS, especially once I get the CNP hardware on it.
I have no doubt the Xshift can support over 1000 HP. Heck my stock motor had to be close to that at the crank before I pulled it. It really shouldn't have much issues making way more than that as well. However there are no big names out there racing running megasquirt. Not that it means anything at all but there is an implication there that perhaps it may not be suitable for builds at a certain point. If I hadn't run into some freak ignition issue I would still have the Pimpxshift on my truck now.
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New PB tonight with an 8.10 @ 87.50! I sprinkled in 1psi more of boost hoping to see a 7, but it didn’t quite get there. Bonehead move and went to the track with a full fuel tank… probably could have gotten it with 1/2 tank.
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You're easily there with a launch. 1.7 60' is still pretty soft and you'd be way into the 7s.
For certain! Still just foot breaking to 1500rpm. Really need to get the 2-step functioning so it’s easier to launch and maybe be closer to building boost off the line.
Did fix my 1-2 shift issue of having a really lean spot during the shift though. Just dropped the shift point down 100rpm. Seems like I was just tickling the 5300rpm limiter setting.
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Did fix my 1-2 shift issue of having a really lean spot during the shift though. Just dropped the shift point down 100rpm. Seems like I was just tickling the 5300rpm limiter setting.
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I meant to tell you that I was seeing the same kind of lean spot from spark blow out.
Local shop had a dyno day today… I was expecting 280-300hp… was very surprised to see 378hp 506tq at 9psi (which was probably 8psi average). Not too bad for a 157,xxx mile 31 year old stock engine and small turbo!
[mention]FMOS Racing [/mention]PxS manual mode worked perfectly. Surprised me that it locked the converter, but that only made the pull better I think.
https://imgur.com/a/CDEHzb8
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[mention]FMOS Racing [/mention]PxS manual mode worked perfectly. Surprised me that it locked the converter, but that only made the pull better I think.
https://imgur.com/a/CDEHzb8
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I was very curious to see what you made since our combos are pretty similar. Your turbo setup is superior to mine, I have a bit more cam than you. What was the difference between the two runs?
And yes, locking the converter on a turbo vehicle makes it happier - turbos love the load. I can feel the surge forward in both of mine when it locks and 100% of the torque is headed to the rear wheels.
And yes, locking the converter on a turbo vehicle makes it happier - turbos love the load. I can feel the surge forward in both of mine when it locks and 100% of the torque is headed to the rear wheels.
About 1psi difference and carried out the second run to 5300 instead of 5000.
1st run was at my normal driving around setting of about 7-8psi... 2nd was 8-9psi setting I've used at the track just to see how it reacts to more boost. I need to install an electronic boost controller as this manual one just doesn't seem to do well with maintaining a tight boost signal. You can see in the logs it dips about 2psi before slowly coming back before the end of the run.
Run 1
Run 2
1st run was at my normal driving around setting of about 7-8psi... 2nd was 8-9psi setting I've used at the track just to see how it reacts to more boost. I need to install an electronic boost controller as this manual one just doesn't seem to do well with maintaining a tight boost signal. You can see in the logs it dips about 2psi before slowly coming back before the end of the run.
Run 1
Run 2
PxS is all the controller you need. Just order the solenoid and pigtail from Stinger. Wire it up and enable boost control. There's a little bit of tuning required to get the initial target openings at various rpms set, but it's not hard.
BTW that erratic vss is likely caused by the RABS module. I tried a lot to get it sorted out in the white truck then gave up and left RABS disconnected.
BTW that erratic vss is likely caused by the RABS module. I tried a lot to get it sorted out in the white truck then gave up and left RABS disconnected.
Yeah, just need to add it to the list along with wiring a button for 2-step/launch control.
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Unplug the dumb RABS +1
I’ll try unplugging it… II only ever see that behavior above about 90mph. Would be nice to get rid of it!
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I didn't have any luck getting a button for the launch control working. I just use the brake pedal (it comes setup for that) and a low mph shut-off. It works fine for doing a burnout (light brake pedal, once there's some wheel spin it shuts off), then launching (hard brake pedal).
The pushbutton circuit is actually shared with the PRNDL position signal, so when you mess with it, the transmission won't shift. You'll have to send the PxS back to Stinger for them to modify it internally for it to work (something has to be clipped). I decided "Nah."
Dang I never knew that. When I had the pxshift I just had my 2 step on a button. Worked perfectly.
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