The difference is night and day
04-01-2009, 05:03 PM
#1
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The difference is night and day And it really is. When im driving during the day, my car's power feels alright, but then at night, it feels like it picks up 30-50hp. There is a big difference. I know cooler air makes more power, but I didnt think it would make that much of a difference. Temps are usually 85-95*F during the day and 65-75*F at night.
Could it be that I need bigger injectors or tb? I need to reconnect my o2 sensors also.
Any ideas??
Could it be that I need bigger injectors or tb? I need to reconnect my o2 sensors also.
Any ideas??
04-01-2009, 05:18 PM
#2
Why are you driving around with your O2s disconnected? 
The other thing - probably psychological. Gauging the fact that something is wrong with your car on the basis that it feels different at night isn't a good excuse to actually think something's wrong.
The other thing - probably psychological. Gauging the fact that something is wrong with your car on the basis that it feels different at night isn't a good excuse to actually think something's wrong.
04-01-2009, 05:42 PM
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Saying it's psychological is a fairly ignorant claim, IMO. While our computer controlled vehicles can account for the atmospheric changes, it may be a big enough one during the day that at night it does perform better. There's heat, humidity, barometric pressure and I'm sure more if I was a meteorologist 
More than likely it is picking up some power during the night when the air is a bit more dense, since he has his O2s disconnected and running in open loop has the car running richer than it should be.
Could just very well be a noticeable throttle response change, which off the line will make it seem like it's picked up power. Like after I installed my 24# injectors before I got my tune in, there was a clear difference in performance, but everyone here said that it just isn't possible I think it was Capricemgr who said that it was most likely the increased throttle response that was throwing me off.
More than likely it is picking up some power during the night when the air is a bit more dense, since he has his O2s disconnected and running in open loop has the car running richer than it should be. Could just very well be a noticeable throttle response change, which off the line will make it seem like it's picked up power. Like after I installed my 24# injectors before I got my tune in, there was a clear difference in performance, but everyone here said that it just isn't possible
I think it was Capricemgr who said that it was most likely the increased throttle response that was throwing me off. Trending Topics
04-01-2009, 05:54 PM
#8
Saying it's psychological is a fairly ignorant claim, IMO. While our computer controlled vehicles can account for the atmospheric changes, it may be a big enough one during the day that at night it does perform better. There's heat, humidity, barometric pressure and I'm sure more if I was a meteorologist More than likely it is picking up some power during the night when the air is a bit more dense, since he has his O2s disconnected and running in open loop has the car running richer than it should be.
Could just very well be a noticeable throttle response change, which off the line will make it seem like it's picked up power. Like after I installed my 24# injectors before I got my tune in, there was a clear difference in performance, but everyone here said that it just isn't possible I think it was Capricemgr who said that it was most likely the increased throttle response that was throwing me off.
More than likely it is picking up some power during the night when the air is a bit more dense, since he has his O2s disconnected and running in open loop has the car running richer than it should be. Could just very well be a noticeable throttle response change, which off the line will make it seem like it's picked up power. Like after I installed my 24# injectors before I got my tune in, there was a clear difference in performance, but everyone here said that it just isn't possible
I think it was Capricemgr who said that it was most likely the increased throttle response that was throwing me off.Also he said "feels like"... That's why it's probably a psychological thing.
04-01-2009, 06:01 PM
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I figured he said that in jest, in a "the fish I caught was THIS big!" sort of way. If he did mean literally, and there is that big of a difference, something is seriously messed up with the car........ or his dyno 
04-01-2009, 06:01 PM
#12
You must have some kind of studder/sluggish acceleration then it picks up right into your power ban.
I rember when my opti was having problems it would feel as if I had turbo lag, then the miss would go away as im hitting my sweet spot in the power ban and pull very hard.
The problem is my car wasnt getting any faster at all, it was just stall and then Id feel the power come on like it should.
Driving around with no sensors is retarded......
I rember when my opti was having problems it would feel as if I had turbo lag, then the miss would go away as im hitting my sweet spot in the power ban and pull very hard.
The problem is my car wasnt getting any faster at all, it was just stall and then Id feel the power come on like it should.
Driving around with no sensors is retarded......
04-01-2009, 06:03 PM
#13
Lol Im still laughing that he thinks hes got 50hp from a car not running right
04-01-2009, 06:05 PM
#14
And it really is. When im driving during the day, my car's power feels alright, but then at night, it feels like it picks up 30-50hp. There is a big difference. I know cooler air makes more power, but I didnt think it would make that much of a difference. Temps are usually 85-95*F during the day and 65-75*F at night.
Could it be that I need bigger injectors or tb? I need to reconnect my o2 sensors also.
Any ideas??
Could it be that I need bigger injectors or tb? I need to reconnect my o2 sensors also.
Any ideas??
04-01-2009, 06:16 PM
#16
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Ok, maybe not 30-50hp, but it is a real BIG differance. I have the o2's sitting in the back seat of the car, but its hard to find the time to put em on, with working 2-40hr/week jobs.
Slick1851, do you have to be such a dick? And it does have a tune on it. I think you are thinking of a scanner. And yes I have 1, and everything looks normal on it, except the code for the 02's. I'm gonna get em connected tomorrow morning when I get out of work, to see if it makes a difference.
Slick1851, do you have to be such a dick? And it does have a tune on it. I think you are thinking of a scanner. And yes I have 1, and everything looks normal on it, except the code for the 02's. I'm gonna get em connected tomorrow morning when I get out of work, to see if it makes a difference.
04-01-2009, 06:21 PM
#17
Ok, maybe not 30-50hp, but it is a real BIG differance. I have the o2's sitting in the back seat of the car, but its hard to find the time to put em on, with working 2-40hr/week jobs.
Slick1851, do you have to be such a dick? And it does have a tune on it. I think you are thinking of a scanner. And yes I have 1, and everything looks normal on it, except the code for the 02's. I'm gonna get em connected tomorrow morning when I get out of work, to see if it makes a difference.
Slick1851, do you have to be such a dick? And it does have a tune on it. I think you are thinking of a scanner. And yes I have 1, and everything looks normal on it, except the code for the 02's. I'm gonna get em connected tomorrow morning when I get out of work, to see if it makes a difference.
Yeah I only posted information that makes sense, sorry for not making weird sounding claims.
04-01-2009, 06:28 PM
#18
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sorry my *** dyno isn't fine tuned, but it does pick up alot of power. From a dig with no burnout, it will stick and launch during the day. Then it will burn em through 1st gear at night with a small burnout. Like i said earlier, it "FEELS" like. not an exact number. Just trying to get my point across.
Of all your posts on this thread, not 1 of em had any useful information.
Of all your posts on this thread, not 1 of em had any useful information.
04-01-2009, 06:36 PM
#19
Go put O2s in your car and take it to a good tuner
You do understand that some times you need to have a car tuned more than once to get it running right. Maybe your car was running to rich and having your 02s off is making the car run lean. Or it could be the other way around, ive got no idea.
Outside temps and humidity play a role in the air feul ratio!
You do understand that some times you need to have a car tuned more than once to get it running right. Maybe your car was running to rich and having your 02s off is making the car run lean. Or it could be the other way around, ive got no idea.
Outside temps and humidity play a role in the air feul ratio!
04-01-2009, 06:42 PM
#20
sorry my *** dyno isn't fine tuned, but it does pick up alot of power. From a dig with no burnout, it will stick and launch during the day. Then it will burn em through 1st gear at night with a small burnout. Like i said earlier, it "FEELS" like. not an exact number. Just trying to get my point across.
You know the cooler the pavement the less traction you get....When it's cold outside you can forget wot in 1st or 2nd but when its warmer outside ill stick in 2nd