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Discussion Starter · #1 ·
Yesterday, i went on the track for the 1st time with my Diesel, but it wasnt the 1st time in my life. Some of you know my previous threads about lapping or drag racing. :grin:

This is what i did with my previous RS Cruze with Vermont tuning : 15.89.jpg

Btw when i drag race, i always go to manual mode (autobox) and deactivate electronic assistance. I also torque-brake for better starts.

So i did this with my Diesel : DieselQuart.JPG

Compared to my old Cruze, i did about 5mph faster and almost 0.2s quicker. For a car that weight more then 200lbs heavier, the power difference is quite clear! :eusa_clap:

I also avg 10mpg better with my Diesel. :signs053:

Btw the stock Fuel economy tires that the ECO and Diesel have are garbage for launching a car from a stop, lol. On my 1st run, i torque-braked hard and when i launched, i was spinning in 1st and 2nd gear so much that i missed my shift to 3rd, lol. Im sure that with better tires i could bring it down to 15.4 - 15.5 with the MPH i have.

Heres a calculator for HP/weight for 1/4 mile : https://robrobinette.com/et.htm

If you enter the stats for a 2014 Civic Si, they say it should do 15s flat, witch is possible for a good driver. Its quite acurate and with a Diesel weighting 3500lbs, they say i have around 210hp at the flywheel, witch is in line with the 50hp tune of Fleece.

Diesel POWA! :th_salute:
 
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So you ran a 15.7 with the fleece 50 tune?

What did you run with the stock ecm?
 

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Anyone have their actual 1/4 times for trifecta vs their stock times?
 

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The car stock feels like a 16 second car.

I agree, the stock tires are garbage. Since I am a bracket racer, I thin when I start this year I'll be letting the trans do the work and launching with TC enabled.
 

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Discussion Starter · #7 ·
those are great numbers. & what kind of tune did you have on the V tuner? thanks & keep posting numbers good luck
Its a custom tune, but very close to the standard tune.
 
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Discussion Starter · #8 ·
So you ran a 15.7 with the fleece 50 tune?

What did you run with the stock ecm?
I dont know, but from the feel of it, i would say a stock should do around 16.2.

The Diesel is an heavy car and im heavy too, lol. (250lbs)
 

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Discussion Starter · #10 ·

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I finally lined my ctd up at a stoplight with a Jetta tdi, both cars black On black, I scoot up and switch to manual waiting for green.....look over and it's a girl looking down texting!!! Oh well, I'll keep searching, lol
 

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Discussion Starter · #13 ·

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Discussion Starter · #14 ·
Btw i found another calculator on the net that tells you how much Flywheel HP your car has if your finished at Xmph depending on the weight of the car.

For a 3500lbs car to finish at 92mph a 1/4 mile you need 210hp. Thats aprox, but still in line with what is advertise as a 50hp tune from Fleece.
 

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Wouldn't that depend on gearing as well?
 

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2014 Cruze Diesel, 2007 Cobalt, 1981 Camaro Z28, 2017 Volt
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Wouldn't that depend on gearing as well?
Absolutely.

My Cobalt would be much quicker in the 1/4 mile if it didn't end up in 3rd gear, which is 1:1, for the last ~1/3 of the run.
 
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Why do slushbox drivers think they can shift their cars better than the TCU can? In a straight-line acceleration race (drag race) there is no way switching to manual shifting could ever help.

Unless your tune enables only in manual mode, which I know was a thing for a while. Otherwise, stop being silly and let the car shift.
 

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Discussion Starter · #18 ·
Why do slushbox drivers think they can shift their cars better than the TCU can? In a straight-line acceleration race (drag race) there is no way switching to manual shifting could ever help.

Unless your tune enables only in manual mode, which I know was a thing for a while. Otherwise, stop being silly and let the car shift.
That made me laugh, but i'll be nice and explain :

1. In the manual setting, in any Cruze autobox, the torque converter hydraulic pressure is higher, so the shift are crisper and power transfer better to the tarmac.

2. In the manual setting you can choose at what RPM you will shift and with a Diesel, thats important, since in automatic it shifts 500 rpm over the powerband, 4500, when the power drops at 4000.

I hope you understand now.
 
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That made me laugh, but i'll be nice and explain :

1. In the manual setting, in any Cruze autobox, the torque converter hydraulic pressure is higher, so the shift are crisper and power transfer better to the tarmac.

2. In the manual setting you can choose at what RPM you will shift and with a Diesel, thats important, since in automatic it shifts 500 rpm over the powerband, 4500, when the power drops at 4000.

I hope you understand now.
So you have side-by-side slips of the car in manual shifting and shifting on its own and there is a measurable difference in the ET?
 

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I though the Cruze Diesel would be a great bracket racer... BUT, with the overboost function, it is hard to be consistent from run to run making it guesswork for Bracket Racing. When I was reviewing the car I entered a bracket race at an event I was covering and the ET varied by 0.5-seconds if I remember correctly... I'm not sure if the Fleece tuning allows "overboost" all the time to make the car more consistent, but stock it was not a good bracket racer...

Personally I liked the way the car shifted on its own versus manual mode which seemed more hesitant to respond to me. Also, I highly doubt that the line pressures are altered in the transmission based on manual mode vs drive, but I have no documentation to back up my assumption so I could be wrong!!!
 
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