I'm a bit of a novice with regard to how engines work, but I thought turbochargers generally only worked at higher speeds/RPMs after they got a chance to spin up. How will the turbo/engine get 140ish lb-ft of torque under 2k RPM? Everything I've heard about turbos indicates a torque/power delay until mid-range.
Maybe Ill just wait for this! Fiesta ST
- Thread starter Memphis
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Stic5
New member
I'm not familiar with the exact torque curve of the 1.4 turbo, but basically it all depends on the size of the turbo you're working with. Big turbos are slow to spool up and have major "lag", but provide the most boost at higher rpms. Smaller turbos (like the one the 1.4 turbo has) spool quickly and provide mostly torque gains at lower rpms, but are far less noticeable near redline. Basically, if you want maximum HP, you use a big turbo and deal with lots of lag. If you just want your small 4 cylander to feel more like a V6, you use a small turbo that spools quick.
Boost
Banned
The Cruze "Stage 0" by Vtuner (170 hp) has been clocked at 6.8 seconds to 60 mph, and it's automatic. Low rpm torque is increased, so at light throttle it should get at least the factory mpg rating. He gets 30+ mpg dogging the car up a mountain. The Trifecta tune may even be a tad faster. Both require premium octane fuel, as any stock 1.4t hoping for best performance and efficiency.
Boost
Banned
The 1.4t develops 148 torque from 1850 rpm to 4000+ rpm. Due to a tiny turbo, precise tuning and everything designed to make this tiny efficient engine feel more than adequate at low rpm, very important. Truly impressive technology, REPLACEMENT FOR DISPLACEMENT
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The 1.4t develops 148 torque from 1850 rpm to 4000+ rpm. Due to a tiny turbo, DIRECT INJECTION, precise tuning and everything designed to make this tiny efficient engine feel more than adequate at low rpm, very important. Truly impressive technology, REPLACEMENT FOR DISPLACEMENT
The 1.4t is not DI.
Boost
Banned
I would actually be happy with 160hp stock and 26/35 like the 1.8 lol
Hurf, I think a Trifecta tune could get you reasonably close to that, no? As I understand they are the onl ones at this time offering T76 TCM and E83 ECM tuning, with a reputation for good results.
I'm confused. I thought the fuel delivery options were either Direct Injection, or Carburetion? How can it not have DI? I thought DI was required for an ECU to be available. If it has a carburetor, does that mean we are going to have to tune it for correct fuel flow and retune any time we move to a different elevation? I had enough of that kind of thing when I had my EX250 motorcycle.
Edit: Ok, I looked it up. It seems I was thinking of Fuel Injection and Direct Injection is an improved version. As long as the Sonic doesn't have a carburetor.
Also, Boost mentioned above: is it confirmed the Sonic 1.4T engine will require 93 octace (premium) fuel and not midgrade or normal (87)? Or was that just for that suped-up Cruze?
Edit: Ok, I looked it up. It seems I was thinking of Fuel Injection and Direct Injection is an improved version. As long as the Sonic doesn't have a carburetor.
Also, Boost mentioned above: is it confirmed the Sonic 1.4T engine will require 93 octace (premium) fuel and not midgrade or normal (87)? Or was that just for that suped-up Cruze?
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RichieRocket
New member
Neato, see the owner's manual that LorbeerTLC posted a while back, it's in a sticky thread in General Discussion.
The Sonic 1.4T runs on 87 octane fuel.
IF you add a tune, you will then need to upgrade to 91
Had to be cost. Those high-pressure pumps and injectors ain't cheap. I bet in a couple years they'll add it though, and MPGs will jump a good bit.
Boost
Banned
"As for why GM didn't opt to install direct injection in the U.S. version of the 1.4T, it was a conscious decision to hold down cost and complexity for the Cruze, a vehicle for which price will be very important. "In General Motors, we have a wide variety of fuel-saving technologies," elaborated Katerberg. "We do use direct injection on a number of other engines but for what we were trying to accomplish with the Cruze, port fuel [injection] is the right choice."
well i wouldn't want Di anyways bc of all the carbon build up on the valves that comes with DI instead of MPFI which cleans up all that carbon with fuel cleaners on the valves.
Memphis
New member
Actually carbon buildup on these newer engines are relatively non existent.
There was testing done where I believe hyundai or ford (cant remember which) took a DI engine with newer tech and ran it for over 100,000 miles and then disassembled it and there was barely any buildup whatsoever.
Im too lazy to look it up but there is a reason that DI engines are being used now. Technology has advanced far enough to the point where there isnt really any negatives for DI.
laborsmith
New member
I think the problem has been solved for the V6 and V8 engines, but persists for the L4 engines. Why it has been solved for some but not all I do not know.
Laborsmith
Laborsmith
