ECS Speed Density Cold Running Update
Thread Starter
Team Owner
Joined: Jul 2004
Posts: 24,652
Likes: 298
From: NJ
St. Jude Donor '05-'08
ECS Speed Density Cold Running Update
After ECS did my S/D tune in the spring, I had many people asked how the car would run during the cold weather and although the Northeast has been pretty nice I had a chance this weekend to test it out.
The car is usually in a garage so cold starts are never an issue, but Friday night it sat outside in my parents driveway. My parents live in upstate NY and in the morning when I woke up the pond behind the house has a thin coat of ice on it so I know it was cold.
I go out to the car to see frost on it and wonder what is going to happen at start up with the S/D tune. I turned everything on and saw the oil temp was 17 degrees (it was at this point I was happy that I just changed over to Mobil 0-40). The outside temp was 27 degrees.
The car started right up and went right to the correct idle. I actually think it was a smoother startup then on a warm day. The car warmed up for 10 mins and then off I went. No problems with the car at all. It ran and idled fine. I was happy to see this since people had me thinking that there might be a problem in the winter.
It seems to have passed the first test now I am just waiting for Jan/Feb to see what it will do when it is cold the entire day.
The car is usually in a garage so cold starts are never an issue, but Friday night it sat outside in my parents driveway. My parents live in upstate NY and in the morning when I woke up the pond behind the house has a thin coat of ice on it so I know it was cold.
I go out to the car to see frost on it and wonder what is going to happen at start up with the S/D tune. I turned everything on and saw the oil temp was 17 degrees (it was at this point I was happy that I just changed over to Mobil 0-40). The outside temp was 27 degrees.
The car started right up and went right to the correct idle. I actually think it was a smoother startup then on a warm day. The car warmed up for 10 mins and then off I went. No problems with the car at all. It ran and idled fine. I was happy to see this since people had me thinking that there might be a problem in the winter.
It seems to have passed the first test now I am just waiting for Jan/Feb to see what it will do when it is cold the entire day.
Thread Starter
Team Owner
Joined: Jul 2004
Posts: 24,652
Likes: 298
From: NJ
St. Jude Donor '05-'08
Originally Posted by vettenuts
Its funny, my C4 (90) had a SD setup. Everyone told me a MAF setup was better (later years). Now we have MAF's and are going the other way.
I think MAF is better from the factory. Probably hell of a lot easier to tune MAF for all cars across the nation, but from what I see from other people with the G5X3 on MAF is that my car runs a ton better and smoother.....
Former Vendor
Joined: Jun 2002
Posts: 2,045
Likes: 3
From: Bridgewater Ma
SD can run perfect in every weather condition.The only variable is that the A/F at WOT can change if the temp table is not right.The main benefit of SD is for part throttle tuning on big Cams that have low vacuum.Smaller Cams will gain nothing hp wise when a MAF is used.
Le Mans Master
Joined: Oct 2001
Posts: 5,577
Likes: 3
From: Southern Maryland Maryland
Originally Posted by phils C5 vette
on your S/D tune, does your MAF stay turned off, or is it S/D tuned then turned back on ?
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Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
Originally Posted by Phil97SVT
Maf gets turned off, SES for 0103 gets turned off and no ce light. The O2s get turned back on to correct.
Phil,
correct me if Im wrong, but I thought you told me on your S/D tuned cars, you turned off the MAF for tuning, then turn on the MAF to allow for flucation in temperture and elevation.
I believe mine is on.
Premium Supporting Vendor
Joined: Oct 2004
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
Glad to hear it's running well Bob.
We have found better idle quality out of large cam cars with this process. It takes longer to tune it this way, but as Bob said, it is easy to tell how much smoother they run when done that way.
We also do this same type of process on cars that are still using the maf to dail in VE tables.
We have found better idle quality out of large cam cars with this process. It takes longer to tune it this way, but as Bob said, it is easy to tell how much smoother they run when done that way.
We also do this same type of process on cars that are still using the maf to dail in VE tables.
Drifting
Joined: Apr 2004
Posts: 1,530
Likes: 250
From: CT
Originally Posted by DOUG @ ECS
Glad to hear it's running well Bob.
We have found better idle quality out of large cam cars with this process. It takes longer to tune it this way, but as Bob said, it is easy to tell how much smoother they run when done that way.
We also do this same type of process on cars that are still using the maf to dail in VE tables.
We have found better idle quality out of large cam cars with this process. It takes longer to tune it this way, but as Bob said, it is easy to tell how much smoother they run when done that way.
We also do this same type of process on cars that are still using the maf to dail in VE tables.
Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
Originally Posted by WKMCD
Phil97svt did my SD tune last week when we had 70 degree weather here. It's f'ing below freezing out now. I'll see how it runs.
DAMN! I hate winter.
DAMN! I hate winter.
Race Director
Joined: Aug 2004
Posts: 14,639
Likes: 39
From: Winston-Salem North Carolina
St. Jude Donor '08-'09
Originally Posted by WKMCD
My car in SD mode ran the same this morning in 23 degree weather as it did in 70 degree weather...
Good to hear, I've always heard that SD was weather dependent.
Safety Car
Joined: Jan 2001
Posts: 3,879
Likes: 3
From: Hobart, WI
My experience is if weather changes, SD tune changes .
At least with a modified engine you can see the VE needs change from day to day based on temp and barometer. That results in AFR swings in PE. SD tuning gives fabulous results but the MAF is a really smart device when used to stabilize the tune. If you SD tune then dial in the MAF to close the loop, you get the best of both worlds. Just my personal experience, in the ever changing Midwest.
At least with a modified engine you can see the VE needs change from day to day based on temp and barometer. That results in AFR swings in PE. SD tuning gives fabulous results but the MAF is a really smart device when used to stabilize the tune. If you SD tune then dial in the MAF to close the loop, you get the best of both worlds. Just my personal experience, in the ever changing Midwest.
Drifting
Joined: Dec 2002
Posts: 1,361
Likes: 0
From: Forest Hill MD
Originally Posted by Wicked Weasel
After ECS did my S/D tune in the spring, I had many people asked how the car would run during the cold weather and although the Northeast has been pretty nice I had a chance this weekend to test it out.
The car is usually in a garage so cold starts are never an issue, but Friday night it sat outside in my parents driveway. My parents live in upstate NY and in the morning when I woke up the pond behind the house has a thin coat of ice on it so I know it was cold.
I go out to the car to see frost on it and wonder what is going to happen at start up with the S/D tune. I turned everything on and saw the oil temp was 17 degrees (it was at this point I was happy that I just changed over to Mobil 0-40). The outside temp was 27 degrees.
The car started right up and went right to the correct idle. I actually think it was a smoother startup then on a warm day. The car warmed up for 10 mins and then off I went. No problems with the car at all. It ran and idled fine. I was happy to see this since people had me thinking that there might be a problem in the winter.
It seems to have passed the first test now I am just waiting for Jan/Feb to see what it will do when it is cold the entire day.
The car is usually in a garage so cold starts are never an issue, but Friday night it sat outside in my parents driveway. My parents live in upstate NY and in the morning when I woke up the pond behind the house has a thin coat of ice on it so I know it was cold.
I go out to the car to see frost on it and wonder what is going to happen at start up with the S/D tune. I turned everything on and saw the oil temp was 17 degrees (it was at this point I was happy that I just changed over to Mobil 0-40). The outside temp was 27 degrees.
The car started right up and went right to the correct idle. I actually think it was a smoother startup then on a warm day. The car warmed up for 10 mins and then off I went. No problems with the car at all. It ran and idled fine. I was happy to see this since people had me thinking that there might be a problem in the winter.
It seems to have passed the first test now I am just waiting for Jan/Feb to see what it will do when it is cold the entire day.
