OK guys, simple question. I am building an engine for my Sunfire. 2005, 2.2 Ecotec, 5 speed. Bottoom line is, I have a goal of 400 horsepower at the wheels. I want it no matter the cost. My engine is built and will take it.
My question is, what all will I need tune-wise for 400 horsepower?. I know the J-body computers are kinda lame compared to most others, but is that goal achievable with HPTuners on a J???
I have so far - Accell adjustable FPR
- Hallman Evolution RX MBC
- 80 LB/HR injectors
- AEM wideband AFR
- 3 inch exhaust
-
I will have - HRC Super 20G turbo
Do I need a 2 or 3 bar MAP sensor for proper tuning, or a higher volume fuel pump or anything else??? Any advice is greatly appreciated. Thanks!!!!
Currently #4 in Ecotec Forced Induction horsepower ratings. 505.8 WHP 414WTQ!!!
Currently 3rd quickest Ecotec on the .org - 10.949 @ 131.50 MPH!!!
setup megasquirt to control the fuel only.
HPT will only work with an FMU but isn't worth the headaches of dealing with our ECM
You can more than get 400 whp with HPT.
FU Tuning
HPT can technically tune for that power alone, but it is tricky and have to be pretty fluent with HPT especially since our ECMs are so simply setup; so I agree go get a megasquirt to control fuel. You will need to upgrade to a minimum of a 2bar MAP sensor but get the 3bar if you can. With those kind of hp expectations you will need something above stock (MAP) to read boost that high. I believe the stocker is only good for around 8psi, but I could be wrong. As far as a fuel pump, Walbro 255lph pump and you'll be fine. Get one for a Mustang and with some very slight modification to the clips it'll fit like a glove. For the most part everything else sounds like it should fall into place if your motor is built.
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
You can definitely get there. The trick will be part throttle/part boost tuning. We do not have boost referenced fueling, nor will changing/adding a different map sensor give us boost referenced fueling. This means that you will have to get as close as you can with a boost referenced FMU and VE tuning, and deal with being a little rich when you are at mid loads in the boost threshold.
For example, in first gear you may get 15 psi at 3500 rpm when you floor it (just and example), but you get 15 psi at 2800 rpm in 5 gear because the engine can load up. Our ECU doesn't care what boost you're at, just what TPS, so you're going to end up being rich in lower gears when the engine flies through the rpm before it can load up...
