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2.4L SUV engine (LE5)
K04 turbo with bullet compressor wheel
FlowForce 960 injectors
On wastegate only here
First run is in red, blue is after some tuning
Tons of room to build power with boost higher up, but I'm happy with the torque, and it feels awesome to drive
2.4L SUV engine (LE5)
K04 turbo with bullet compressor wheel
FlowForce 960 injectors
On wastegate only here
First run is in red, blue is after some tuning
Tons of room to build power with boost higher up, but I'm happy with the torque, and it feels awesome to drive
That is a little torque monster youve got there. How much boost is wastegate on those engines? How much flow is the K04 good for? 300ish whp?
The peak torque there is 12psi. I'd like to see a bit more flow in the wastegate to take the edge off that spike, but I'm sure I'll be well over 12psi soon enough. After the spike, it drops quickly to 9psi, then down to 8psi from 5000 to redline (7000).
My next step is to get EBC dialed in and get it dialed in at 11-12 psi all the way up.
According to the literature, with the bullet compressor wheel, this turbo should be good for 400hp. The engine and drivetrain should support 350, but we'll see how far I get in that direction.
Based on experience tuning LNF's from my Cobalt SS days, the Twinscroll K04 offered on the 2.0L would make ~300whp and ~350wtq on 21-22psi on 93 octane with nothing more than just a tune. It was enough to push my otherwise stock cobalt to a 13.4 @ 111 1/4 mile time with a horrible 60' time vs 14.0 @ 102 from factory spec. More daring guys were edging as high as 330whp / 380 wtq on 24-25psi and E47 fuel, but you really are pushing the turbo hard to get there from a long term reliability standpoint. You may end up making a bit less due to some extra drivetrain losses in RWD layout, but should still be close once you get it dialed in. Those numbers were also ramping in boost pretty hard, which isn't necessarily preferred for road course application.
The long story short of it, a 2.4 Le5 k04 powerplant would be a blast in a Miata. Torque for days. Numbers look good given the circumstances. Anxious to see how to dyno charts look once you get the EBC working.
I got it up to 10 psi at the redline with EBC at 100% duty. However, in a continuation of the story of me not knowing what I'm doing, turns out this turbo has a built in bypass valve. I didn't have anything connected to it, so it's certainly letting a bunch of air past under boost. I'm thinking I could just tee it in to the manifold reference that I have my BOV set up on, so they both release when I lift off. Then at some point I'll decide whether to stick with a BOV or run that bypass valve instead. Blockoffs for that valve exist. To be continued!
The turbo I have has a billet compressor wheel that's supposed to be good for an extra 30-50wph at the top end. I remain hopeful that I can hit 350/350 on E85
Yes, it's with me right now, have it sorted out and street tuned up to 16psi flex-fuel currently on e70 it's an absolute animal. Hoping to dyno it this week or next. updates on Instagram, @vladituned
My only concern is this motor is an 08'. I'm not shooting for the moon but bet your *** I'll put it through the ringer at 300 wheel. I reckon a proper tune is the recipe to a lasting boosted motor. Following on the IG can't wait to see the results.
My only concern is this motor is an 08'. I'm not shooting for the moon but bet your *** I'll put it through the ringer at 300 wheel. I reckon a proper tune is the recipe to a lasting boosted motor. Following on the IG can't wait to see the results.
I'm to understand that a small number of early '08s had forged rods, but the majority aren't. 300whp is aggressive for the powder rod version. To be safe you'd be better to stick to 275 or so, which will still be insanely fun because of the massive amounts of torque.
04-26-2019, 01:23 AM
2.4 ecotec turbo
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