Im at work so I cant do a search

When I start my car in the morning. it is VERY quick to get to 100 degrees. Wich took a while longer on my LSJ. I usually let it warm up to 100 degrees before i moved the car at all.

Whats a safe degree to let the car wam up?

and do these cars run pretty warm?

I was cruising on the freeway and my temp was 186-196?


is this normal?

 

Both of what you mentioned are normal for me too. I usually wait until it's above 100 and starts bringing fuel pressure down (as seen on the RPD). Some people wait for the cold idle to come down from 1000+ RPM as their indicator.

Even on cold mornings, it'll get up to 100-115 pretty quick and then will warm up to around 190 and then it'll stick around 190-200.

I think it may be a characteristic of DI too. The engine can warm to operating temp quicker while also using the fuel to help cool itself later too.

I just saw you've got an RPD, so you can watch it do it's warm up. You'll notice that the fuel pressure will first be high and the intake/exhaust cams both phased. The car will get up past 100 degrees somewhere and then the fuel pressure will drop to around 500-ish psi, the exhaust phasing will then start reducing to 0, and then once the exhaust is 0 phasing the intake phasing starts decreasing to zero, and you'll notice that it starts getting its normal idle sound. Just an FYI in case you were interested in the inner workings since you can see that happening on the RPD.

 

I DONT HAVE THE rpd just yet/

im having it installed this weekend.

 

Cool. I think you'll like it. It makes driving more interesting seeing what the car's doing.

Yeah, for those without RPD or anything, just let it get over 100-115 at least and/or just wait until the idler starts dropping towards the 800 norm. Be easy on it though until it's up to operating temp of around 190.

 

When the LNF cold starts it goes into cat warmup mode. It injects fuel on both the intake and compression stroke which is why the motor loads up and the turbo almost spools up. I just wait until the boost guage goes down to the 20lbs of vac mark and the idle comes down to under 1K which takes a min. or two.

 

ok thanks guys!

 

Can you get the RPD on the 4dr ss/tc?

 

if it is an 09 then yes i believe so.

maybe. lol

 

Your welcome. I think the car sounds crazy when it starts up. I still am not used to the way it sounds.

 

I usually wait for RPMs to drop AND for temp to be over 100*F. Once both of these conditions are met, I start to move the car. I keep it under 2500 until I hit 150*F. Then, I keep it under 3000 until I hit operating temps (190ish). Remember, it takes oil a lot longer to warm up than it does coolant.

 

I usually start my car and leave within 15 seconds in the winter (-20F at the coldest). I use all synthetic lubricants and don't beat on the car until the temp needle goes up.

215F-225F is the normal operating temp for MOST gasoline engines. You want the engine to run hotter than 212F to burn off any residual moisture in the engine oil.

 

The car runs like crap if you do that. It bucks and jumps under light throttle and the response is kinda crappy until the car comes out of cat warm up mode ( A/F is really rich) but it is your car do what you want to it.

 

That's a negative.

 

hmmmmmmmm idk. because since my car isnt wired for the RPD. they will have to do it at the dealer. they included the RPD in the price for the car.

but you wouldhave to go to your dealer and ask.

ill get the product number for you soon

 

The RPD and High-Rise options weren't/aren't available factory on the sedan. I liked the RPD when I was looking around originally and would have considered the sedan more if it was available on it, but that combo isn't available... probably because of the likely buyers of each. I wasn't firm on the high-rise vs low-rise option so if there was an RPD sedan, I may have considered it. There are some old posts around here somewhere too about the RPD option disappearing when you chose a sedan when "building a car" on Chevy's website.

Maybe it's wired as such that you can do it after the fact though. So don't give up hope. I would also consider other alternatives that may be even better/cheaper/more informative though. I've even thought about putting up some separate guages on the A-pillar in addition to the RPD, since you can't make the RPD show certain combos of things (say coolant temp, outside temp, and engine inlet temp at once), only preset left/right pages of things.

Maybe somebody can come up with a new firmware flash that enables something like that. It'd be great to see your boost guage in addition to another guage at once, or vacuum on the boost guage like a normal boost guage too.

 

well true true

Ill find out by tomorrow on this

asking my buddy at the GM dealer.

 

Yes, mine reaches 100* very quickly. (I'm talking when it's COLD outside!)
Mine runs with the temps 196-199. I discovered at a drivethru my fan kicks on about 207*.

 

I don't drag race or auto-x my car in the morning, so I just take it easy and let it warm up along the way. The bucking and sluggish throttle response is from the retarded timing to heat up your cats faster. Sitting there idling for 15-20 minutes is just a waste of gasoline. Since your engine oil is synthetic 5W-30 and the F35/MU3 uses synthetic 75W-85, you are not hurting anything by leaving within 15-30 seconds of start up as long as you're not thrashing the snot out of the engine and turbocharger. The Europeans actually go as far as backing into their parking spot so they can leave using only the forward gear to save on fuel consumption.

 

The timing (Cam and ignition) is retarded but the fueling is also very different. Injectors inject fuel on both the intake and compression stroke. Which is the main reason the turbo spools up some and that is waht really warms the cats fast all that extra NOx and other pollutants the cats break down. BTW. You burn more fuel if you dont let your car warm up properly than you do letting it warm up some. True excessive idleing will hurt your fuel economy but running the car, even being easy on it, before it warms up does burn more fuel unless you are keeping the revs below 1400 constantly.

 

I tell people that I usually drive in 5th gear around town - they give me the weirdest look. As per my Ford owner's manual for the Mustang GT, they recommend shifting at just under 2000 RPM - hence how I can cruise in 5th gear at under 50 MPH. I never shift higher than 2000 RPM unless I am trying to get somewhere fast.

Like I said before, I usually take it easy on the car until the temp needle goes up - idling your car in the winter wastes far more fuel than just driving off. I did the test on my cars in the past. If I idled the car until it got to a higher coolant temp, I would average 4-5 MPG lower than just leaving after 15-30 seconds of idling.

 

speed shifting is terrible for the motor. especially for gas milage. makes the motor work harder to catch up the rpms for the next gear.

 

If I am above 45 mph I am in 5th too. I get up to 50 mpg instant at those speeds. My results in testing whether it is better to warm the car up first then drive or just drive away came up with different results than yours though. I averaged approx 2-3 mpg better if I let the car warm up for a few minutes before driving off. I attribute this to the fact that I live right on a main hwy and the speed limit is 55-60 so if dont let it warm up the car is sluggish so it takes a lot longer to get up to speed, and once i set my cruise for the first 5 min or so of my drive the car averages only 27-29 mpg at 55-60 mph. If I let it warm up as soon as I get up to crusing speed I average 34-37 mpg at that same speed and within two minutes about 40 mpg. Results may differ depending upon driving conditions city vs hwy and so on. Just my findings.

 

Its not going to hurt anything. If driving right after you started a car actually hurt something you would see a lot more cars on the side of the road.

 

I can see why you get different results. I can cruise around for about 5-10 minutes leaving my subdivision at around 25-30 MPH max.

 

909-390-2900

call this number. its to the service department for a GM dealer. you can ask personally if they can install the RPD on the Sedan