Vince buys a Cruze LTZ
11-30-2010, 12:23 AM
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Nice I wonder how it would do with upgraded intake and exhaust now... I thought it would have a bit more Hp after the tune, but did not expect that much Tq at all. Makes me think about what the turbo off of the Cobalt would add too.
11-30-2010, 10:49 AM
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It has a super quiet intake system - you can't hear the turbo at all. Even with the boost raised up, all you hear is a wooshing sound at full spool, and even then it is really quiet.
11-30-2010, 10:51 AM
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The Cruze has two cats, one resonator and one muffler. The front cat is right at the turbine outlet and uses a v-band clamp to attach. There's a flex joint between the front cat and the rear cat.
It has a super quiet intake system - you can't hear the turbo at all. Even with the boost raised up, all you hear is a wooshing sound at full spool, and even then it is really quiet.
It has a super quiet intake system - you can't hear the turbo at all. Even with the boost raised up, all you hear is a wooshing sound at full spool, and even then it is really quiet.
11-30-2010, 10:54 AM
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Sorry, I don't. The car was WAY too dirty to show on video. Haha. But, I may be going back soon to test with E85 or water/meth injection, I'll try to get a video of it when I do. And I'll wash it first.
It's an amazingly quiet little engine. You can tell they spent lots of time figuring out how to make things quiet in the car. The guys at the dyno were joking that they couldn't hear it running.
It's an amazingly quiet little engine. You can tell they spent lots of time figuring out how to make things quiet in the car. The guys at the dyno were joking that they couldn't hear it running.
11-30-2010, 06:33 PM
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e85 should gain you an extra 30hp the cruze its basically a vw 1.8t just a little bit smaller engine should do nicely with intake,dp,full exhaust and e85. it would surprise a few people
11-30-2010, 07:10 PM
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i dont see why GM need better Fuel economy on the turbo when i think the SS gets good enough, better than that dam base i had
nice to see an intrest in tuneing the cruze vince, wish i would have just paid the base of and got one of them
nice to see an intrest in tuneing the cruze vince, wish i would have just paid the base of and got one of them
11-30-2010, 11:36 PM
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Update: I ran a 50/50 mix of E85 and Supreme in it today, on the street, and tuned for it - it didn't feel much different, but we were able to squeak a few more degrees of timing into it.
With the 50/50 mix, we're reaching the limits of the stock injectors. However, the nice thing about the Cruze is it has a variable speed fuel pump so we can raise the pressure (and extend the injectors) under high flow conditions. I believe it will be possible to run 100% E85 without an injector swap.
With the 50/50 mix, we're reaching the limits of the stock injectors. However, the nice thing about the Cruze is it has a variable speed fuel pump so we can raise the pressure (and extend the injectors) under high flow conditions. I believe it will be possible to run 100% E85 without an injector swap.
BTW i have the 1.4l turbo LTZ also 
12-01-2010, 11:39 AM
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Yes - the transmission tune from the factory is terrible. In fact, by the time I bought my car, GM had already released an updated transmission tune (including a new operating system).
The Cruze uses a brand new transmission controller (called the T76) which is very similar to the T43 used in the existing 6sp automatics.
The Cruze does NOT come with a SPORT mode from the factory, but I added one to mine through the TCM tune. When the shifter is in D mode, it's one profile, and when I move it to the manual quadrant, it goes into an automatic-shifting "SPORT" mode, and then you can TAP it from there. When we get to select-a-tune working for the Cruze, I will probably tie it to this on the automatic cars.
The Cruze appears to have an LSD from the factory. When I floor it (with our tune on it), both tires spin. LOL.
The Cruze uses the same transmission as the 180HP Buick Regal 2.4L SIDI, so even with our cranked-up tune, we're well within the designed torque specifications.
As for tuning it goes, I've tightened up the shifts in SPORT mode, it made a BIG difference. The factory desired shift times are around .5 seconds. I pulled this down to .1 second and it shifts immediately. I need to work on downshifts yet, but initial results are very encouraging - better than what I was able to achieve with my Buick LaCrosse.
The 6sp automatics have a very sophisticated torque management system. It is possible to greatly exceed the design specs for torque input as long as you don't try to carry the torque through the shift. I've tuned 6sp automatic Corvettes making over 600HP at the input shaft of the transmission that live a long life yet because the TCM is so effective and getting the ECM to remove torque during shifts.
So, in short, with careful tuning, I believe the slushbox will be able to handle lots of power, and we might even be able to turn it into more of a gearbox. Haha!
The Cruze uses a brand new transmission controller (called the T76) which is very similar to the T43 used in the existing 6sp automatics.
The Cruze does NOT come with a SPORT mode from the factory, but I added one to mine through the TCM tune. When the shifter is in D mode, it's one profile, and when I move it to the manual quadrant, it goes into an automatic-shifting "SPORT" mode, and then you can TAP it from there. When we get to select-a-tune working for the Cruze, I will probably tie it to this on the automatic cars.
The Cruze appears to have an LSD from the factory. When I floor it (with our tune on it), both tires spin. LOL.
The Cruze uses the same transmission as the 180HP Buick Regal 2.4L SIDI, so even with our cranked-up tune, we're well within the designed torque specifications.
As for tuning it goes, I've tightened up the shifts in SPORT mode, it made a BIG difference. The factory desired shift times are around .5 seconds. I pulled this down to .1 second and it shifts immediately. I need to work on downshifts yet, but initial results are very encouraging - better than what I was able to achieve with my Buick LaCrosse.
The 6sp automatics have a very sophisticated torque management system. It is possible to greatly exceed the design specs for torque input as long as you don't try to carry the torque through the shift. I've tuned 6sp automatic Corvettes making over 600HP at the input shaft of the transmission that live a long life yet because the TCM is so effective and getting the ECM to remove torque during shifts.
So, in short, with careful tuning, I believe the slushbox will be able to handle lots of power, and we might even be able to turn it into more of a gearbox. Haha!
12-01-2010, 11:47 AM
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While it's no LNF, it makes a big difference. I may be biased though. Haha. But seriously, the first thing I noticed was the lack of performance the car had from the factory.
12-01-2010, 11:49 AM
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