MS3PRO EVO on 4th Gen 3sgte Options

[HardHead93]

I just got my MS3PRO EVO in for my conversion to standalone on my 4th gen 3sgte. I am planning on taking my time with this install to make sure all the wiring is correct and clean looking. To help with the install I grabbed a 5sfe ECU and mounting hardware out of a junkyard car to use as a template for mounting the Megasquirt into the car.









Got relays, distribution blocks, and different color wiring for a clean centralized install.




My goal is to wire the ECU up for as many features as possible and once I get good tune running, start enabling the features. I spent the last few days reading the instruction manual and it has me excited with how much it can do.

This post has been edited by HardHead93: Sep 8, 2017 - 8:15 PM

[HardHead93]

I finally got the car tuned with the MS3PRO EVO. I made 252 horsepower and 251 torque. That is up from 238 horsepower and 233 torque from my dyno session at the beginning of summer on the stock ECU. Not as much as I expected but we were having some problems with the wastegate. When I got it dyno'ed it back in the summer the wastegate was holding 16 psi with a duty cycle of 50% and 30% gain on the boost controller. Now I had to turn the boost controller up to 66% and 100% gain just to get it to 15 psi and it was having trouble holding that boost level. I think the wastegate may be starting to go bad. Also, he was running into some problems with the AFRs. Come to find out TunerStudio was reading differently than the actual values on my boost gauge. At one point the software was reading 10.5 AFR while the boost gauge was reading 11.5 AFR. This was causing some problems with knock until we figured it out. In order to fix the problem, I built a custom inc file and grounded the gauge to the engine block and the battery. This allowed TunerStudio to read AFRs from the gauge's datalog cable the same as actuals.

Any hoo, 252 hp, if you take drive train loss of 15% into account that is 296 hp at the crank. No bad for a engine rated at 256 hp at the crank from the factory. Here is the newest dyno chart:


Strapping the car on the dyno:

[url="https://flic.kr/p/2166cPw"]
[url="https://flic.kr/p/2166dvw"]

Here is the dyno chart from beginning of summer:

[url="https://flic.kr/p/HeGdtF"][url="https://flic.kr/p/HeGdtF"]

You guys are probably wondering, what changed besides the ECU from the earlier dyno session? (Then -> Now)
1. A2A intercooler -> W2A intercooler
2. Engine bay intake -> Cold air intake
3. Stock Denso 550cc injectors -> Bosch 850cc Injectors (ethanol save)
That is it.

The cool thing is I have the engine set up for a flex fuel tune (bigger injectors, bigger fuel pump, and flex fuel sensor) and hopefully I will be able to get some numbers to you guys in a few weeks running e85. Is there anything else I need to change out to make sure the ethanol does not eat it up?

Other cool features/fixes set up with the ECU are the following:
1. Waaaaayyyyy smoother idle
2. AC idle up works now!
3. Car runs smoother and feels peppier even at low speeds/rpms
4. Launch control
5. Intercooler fan turns on based on IAT and coolant temps plus I can adjust settings easily
6. Check engine light for issues (oil temp, oil pressure, water temp, etc.)
7. No more governor (that one might get me in trouble )

Again, like I said, not as much power as I expected. pitcelica hit 270 hp with a MS3 on a gen 4 3sgte but it looks like they ran into some of the same problems with boost dropping off. Bottom line, every motor is different and every tuner is different so I can't expect the exact same results but I am close. The tuner I used has done a lot of 3rd and 4th gen 3sgte's and is know for his reliability which is why I chose him.

Let's see how long this wastegate lasts. ATS Racing sells a CT15 turbo wheel billet upgrade with the option to add on a new wastegate so I may be going that route in the near future.

This post has been edited by HardHead93: Dec 5, 2017 - 1:05 AM