Power loss after header install
#1
Power loss after header install
Hi guys, here is my problem :
I installed a pacesetter header(few weeks ago) with a catless dp 3" that narrows to 2.5" at the end. I have a defouler kit too, because I'm not tuned.
Between 3.2k and 3.7k rpm, I have a huge loss of power. But, after 4k rpm, I have a big power gain over stock manifold/dp.
How could I solve the power loss(if it's solvable) :
Put a cat on it(more restriction)?
Get a 2.5" dp?
Get a tune?
Only other mod is a CAI. I have stock catback(and it sounds like crap).
Thank!
I installed a pacesetter header(few weeks ago) with a catless dp 3" that narrows to 2.5" at the end. I have a defouler kit too, because I'm not tuned.
Between 3.2k and 3.7k rpm, I have a huge loss of power. But, after 4k rpm, I have a big power gain over stock manifold/dp.
How could I solve the power loss(if it's solvable) :
Put a cat on it(more restriction)?
Get a 2.5" dp?
Get a tune?
Only other mod is a CAI. I have stock catback(and it sounds like crap).
Thank!
#4
what size primaries? If you got 1.75 you can't really tune this out because the exhaust velocity just can't get that high anymore with such big primaries. High exhaust velocity= mid range torque.
#11
Well I got this header almost free, I had to try it.
But, I went drag racing yesterday and now my exhaust is louder and sounds like marbles are in it when I shift. I may have a exhaust leak or my muffler died from the extra flow/heat. I'll check that next weekend, maybe going back to stock.
But, I went drag racing yesterday and now my exhaust is louder and sounds like marbles are in it when I shift. I may have a exhaust leak or my muffler died from the extra flow/heat. I'll check that next weekend, maybe going back to stock.
#12
well i got this header almost free, i had to try it.
But, i went drag racing yesterday and now my exhaust is louder and sounds like marbles are in it when i shift. I may have a exhaust leak or my muffler died from the extra flow/heat. I'll check that next weekend, maybe going back to stock.
But, i went drag racing yesterday and now my exhaust is louder and sounds like marbles are in it when i shift. I may have a exhaust leak or my muffler died from the extra flow/heat. I'll check that next weekend, maybe going back to stock.
#13
what defouler kit do you have? i get a cel with my zzp 2.5 catted dp and i tried the vibrant one and well it got rid of the cel but then caused a different cel "rich to lean lean to rich" weird.
#15
After checking the install to make sure all your stuff is installed properly get a tune. I installed my vibrant headers on my old 2.4l and noticed modest gains, great improvement in the depth of exhaust sounds, but then after a tune... holy ****. Tune + headers = win. I also got lightweight pulleys and an engine mount, which made it put power to the ground alot faster.
#17
Oh thats not good i need something to completely rid of cel the vibrant defouler dont work. I have inspections here. Getting sick of swapping to stock dp lol. I dont wanna tune tho and i read someone say i still wont pass inspection with it tuned off
#19
It did for me the car would lean out at idle and run a little strange. Got more afr flutter on my wideband than normal and that caused my cel for lean to rich ruch to lean not sure of code numbers. This is with using tje vibrant defouler. I completely removed the rear o2 sensor and the car ran much much better lmaoo but i put it back in and ditched defouler and deal with 420 code which isnt a problem the inspection is and i haveto swap to stock dp its a pain in the ass.
#20
So honestly I will probably be going with the zzp longtube and 1.75 primaries but thats also so I have some room to grow in the future.
To the OP: Get a tune.
#22
I didn't lose that much lowend is my point. I'm an auto and I was still able to spin 235/40/18 summer tires for 3-5 feet just flooring it from a stoplight. It maybe an na 4cyl but its a decent size 4 with fairly high compression. Its not as bad as many people think. It doesn't suddenly turn us into b series hondas.
#24
I may have some of the same issue. i went to the tack this past Sunday. last time i went i had a K&N SRi adn a Megan cat back. ran a 14.9. went back with a ZZP Midlegth/catted DP, GMPP Cat back, LSJ TB and K&N Intake. best i could do was 15.1. i was having traction issues, but i feel i desperately need a tune! car should still trap faster than before and its not