Do you always let your 8 warm up before driving?
12-22-2006, 12:53 AM
#26
Originally Posted by ken-x8
Most carbureted cars were OK to drive when cold. If the automatic choke was clean and worked, they weren't much different than today's cars. Manual choke, as long as you worked it right, were also OK. Maybe there were people who'd let their cars warm until the choke could be turned off.
However...some cars did need a warmup. My first car was a 1958 Alfa Romeo Guiletta Spider. That car really needed to warm up. Unless I sat there letting it warm under idle before driving off, there was just no power. Don't know just what the deal was, but it was common to all Alfas of that series.
Ken
However...some cars did need a warmup. My first car was a 1958 Alfa Romeo Guiletta Spider. That car really needed to warm up. Unless I sat there letting it warm under idle before driving off, there was just no power. Don't know just what the deal was, but it was common to all Alfas of that series.
Ken
A lot of people struggled with it though . My aunty used pull the choke out to hang her handbag on it
12-22-2006, 08:46 AM
#27
Skeet skeet skeet
Join Date: Jun 2006
Location: making my way to the ATL
Posts: 393
Likes: 0
Received 0 Likes
on
0 Posts
I'm glad other people are using 1500 RPMs as some sort of benchmark. I, too, usually wait until the engine is idling at 1500 and take off slowly.
Since it has gotten colder, my engine sputters when I start it up, sort of what I imagine detonation to sound like, but I have been using 91 octane for my last 5 or 6 tanks. I'm not too mechanically inclined, so I hope someone can listen to it at the next meet and tell me its normal.
Since it has gotten colder, my engine sputters when I start it up, sort of what I imagine detonation to sound like, but I have been using 91 octane for my last 5 or 6 tanks. I'm not too mechanically inclined, so I hope someone can listen to it at the next meet and tell me its normal.
12-27-2006, 09:08 PM
#29
II SOCIETY
Join Date: Nov 2006
Location: The Bay Area
Posts: 1,077
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by cesaralaniz
I usually just keep the RPM's low until it's warm, but I like your idea.
Maybe you can start an ad campaign for Phillip/Morse about how smoking cigarettes is good for the rotary.
I mean, they used cartoons to target kids, maybe they can use this to target rotorheads.
No, but seriously, I like the idea of doing some last minute things in the morning while waiting for the car to warm up.
Maybe you can start an ad campaign for Phillip/Morse about how smoking cigarettes is good for the rotary.
I mean, they used cartoons to target kids, maybe they can use this to target rotorheads.
No, but seriously, I like the idea of doing some last minute things in the morning while waiting for the car to warm up.
Plus, I don't like to smoke in my car. I still don't drive "hard" right away. I usually start getting on it mid-way on the freeway (about 15 min.).
12-28-2006, 09:36 AM
#34
Guns, God, and Country
A buddy of mine had remote start on his hatch and he had let someone drive and did not know they had left it in gear so when he started it and it rolled out onto the access road to I-35 without getting hit. Man was he lucky. I never park my car in gear so I am thinking of installing it on my car.
12-28-2006, 09:41 AM
#35
Registered User
Join Date: May 2005
Posts: 685
Likes: 0
Received 0 Likes
on
0 Posts
It depends...when I was learning on my car and stalled a lot...i'd always let it warm up completely before driving. Now, I just drive it (never going above 4krpms) until the engine is warmed up.
12-28-2006, 09:48 AM
#36
Banned
Join Date: Dec 2006
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by redcivic
A buddy of mine had remote start on his hatch and he had let someone drive and did not know they had left it in gear so when he started it and it rolled out onto the access road to I-35 without getting hit. Man was he lucky. I never park my car in gear so I am thinking of installing it on my car.
12-28-2006, 09:59 AM
#37
Registered
Join Date: Jun 2005
Posts: 52
Likes: 0
Received 0 Likes
on
0 Posts
My reasoning is why waste gas while idling to warm up. On cold days here, it would rev automatically between 2 and 2.5K. So why not just drive the first couple kilometers keeping the revs around that range until its warmed up a bit.
Even on -20C days, I'm gone within 20secs.
Even on -20C days, I'm gone within 20secs.
12-28-2006, 11:25 AM
#38
Registered
Originally Posted by redcivic
A buddy of mine had remote start on his hatch and he had let someone drive and did not know they had left it in gear so when he started it and it rolled out onto the access road to I-35 without getting hit. Man was he lucky. I never park my car in gear so I am thinking of installing it on my car.
I see you've got one already.
Ken
12-29-2006, 12:33 PM
#39
Would like to hear rotarygod's thoughts on this one too.
I let my car warm up for 2 to 3 minutes in the morning or if its been sitting for many hours/days and its cold outside. If the temp. gauge shows the engine being warm, than I just drive off. During the day or after you have driven it, the temp. gauge will usually move quickly from cold to center (warm).
I let my car warm up for 2 to 3 minutes in the morning or if its been sitting for many hours/days and its cold outside. If the temp. gauge shows the engine being warm, than I just drive off. During the day or after you have driven it, the temp. gauge will usually move quickly from cold to center (warm).
12-29-2006, 03:20 PM
#40
Laid back in the pocket
Join Date: Mar 2006
Location: Blacksburg, VA
Posts: 522
Likes: 0
Received 0 Likes
on
0 Posts
I've actually heard you burn more gas by running the car cold, before its warmed up, than if you let it idle for a couple of mins. to warm up.
I know my car likes to be warmed in idle until the temp. needle has moved some. It seems to run rougher if I just get in and go. I also seem to have fewer "marbles in a blender" sounds if I let the car warm to about 1/2 way to norm. temp. (in idle). I also stay below 4k until I've reached norm. temp, and below 5k until I've been at norm. temp. for about 5 mins.
Isn't the only reason idling is bad for an engine is if it idles so excessively that engine temps. soar? Why else would idling be bad? How long is too long to let it idle (cold or norm. temp.)?
I know my car likes to be warmed in idle until the temp. needle has moved some. It seems to run rougher if I just get in and go. I also seem to have fewer "marbles in a blender" sounds if I let the car warm to about 1/2 way to norm. temp. (in idle). I also stay below 4k until I've reached norm. temp, and below 5k until I've been at norm. temp. for about 5 mins.
Isn't the only reason idling is bad for an engine is if it idles so excessively that engine temps. soar? Why else would idling be bad? How long is too long to let it idle (cold or norm. temp.)?
Last edited by Rhythmic; 12-29-2006 at 03:27 PM.
12-29-2006, 03:39 PM
#41
Originally Posted by Rhythmic
I've actually heard you burn more gas by running the car cold, before its warmed up, than if you let it idle for a couple of mins. to warm up.
How long is too long to let it idle (cold or norm. temp.)?
How long is too long to let it idle (cold or norm. temp.)?
How can you burn more gas ?
idle = 0MPG & this car does not run excessively rich when cold .
If you had a scan guage you would be surprised how quickly the temp comes up at idle . It goes from about 90 deg C normal running to 98 deg C (at which point the fans kick in) in less than 5 mins.
I have done tests which show this car becomes considerably less powerfull as the temp increases within the factory "acceptable" range.
12-29-2006, 03:42 PM
#42
Registered User
Join Date: Aug 2006
Location: El Paso Texas
Posts: 111
Likes: 0
Received 0 Likes
on
0 Posts
I ALWAYS warm the car up at idle for 2-3 minutes then drive it like a baby until operating temps have been reached. I premix and in cold weather I see this as another advantage in premixing. I know that from the getgo there is always lubrication present. The main reason for warming gradually is the different expansion coeficient between the aluminum rotor housings and the cast iron side housings. They expand at different rates Back in the 70's people who start their car and rapidly drove it suffered warpage of the rotor housings and leakage of coolant into the combustion chamber. I have seen this first hand and it's not pretty. Warm up your car, drive it easy until it's temps are stablized and put a little premix in the gas. The engine will last a long long time. BTW I also let it idlle at the end of a trip for a minute or so before shutting it off, and I NEVER start it run it for only a for seconds then shut down. I don't start it unless I'm gonna give it time to warm up.
12-29-2006, 04:11 PM
#43
Laid back in the pocket
Join Date: Mar 2006
Location: Blacksburg, VA
Posts: 522
Likes: 0
Received 0 Likes
on
0 Posts
So...if the cooling fans are working correctly, would idling the engine for more than a few mins. damage anything?
I ask this b/c, often I will let my car idle for up to 5-7 mins. while I run into the store to avoid extra starts (which I thought were harder on the engine).
I ask this b/c, often I will let my car idle for up to 5-7 mins. while I run into the store to avoid extra starts (which I thought were harder on the engine).
12-30-2006, 11:32 AM
#45
Laid back in the pocket
Join Date: Mar 2006
Location: Blacksburg, VA
Posts: 522
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Brettus
can't see that it would damage anything - just make it a bit sluggish when you first get going again
Would sluggish response or apparent power loss after a period of idle mean compression loss/carbon buildup (recall issue)?
My earlier comment about warm up did assume a rich mixture until warm.
Last edited by Rhythmic; 12-30-2006 at 11:37 AM.
12-30-2006, 01:50 PM
#46
Originally Posted by Rhythmic
Increased heat=power loss...? Is that you logic? That makes sense, but I've not experienced it.
Would sluggish response or apparent power loss after a period of idle mean compression loss/carbon buildup (recall issue)?
.
Would sluggish response or apparent power loss after a period of idle mean compression loss/carbon buildup (recall issue)?
.
The power loss may not be that noticeable but it is certainly there & it affects perfectly healthy engines.
Here are the tests I did .
https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/cool-vs-hot-acceleration-test-results-101595/
12-30-2006, 02:23 PM
#49
Originally Posted by ken-x8
Are those differences more than what could be attributed to density differences in the intake air?
Ken
Ken
It is a significant horsepower difference -I got less impressive results from tuning (which showed 15whp peak gain on the dyno)
