Exchaust Cut-Out... Gain Power?
#2
Re: Exchaust Cut-Out... Gain Power?
I would say its pretty decent gain... I think i remember some people saying a 10Hp gain over their aftermarket muffler... so, probably 15hp... You lose low end power and torque, but you can tell the top end power is alot better
#3
Re: Exchaust Cut-Out... Gain Power?
I will have to agree with the above. I just had mine installed a few days ago, and I can notice a difference when it closed and when it is open. I think it is a worth while mod.
Cameron
Cameron
#7
Re: Exchaust Cut-Out... Gain Power?
I did some testing with my cutout. Same night, same conditions.
1st run, cutout closed, 2.1 60', 9.108 @ 78
2nd run, cutout open, 2.1 60', 9.108 @ 78
I am not lying, and if anything the conditions were better for the second run as the night was progressing. I figured that after that first 9.108 I would at least get a 9.0X later in thte night, but nope, I even left it open through the night and never got better.
So, if there is a difference, the 1/8th mile doesnt show it. I think alot of it must be the driver hearing new sounds
-James
1st run, cutout closed, 2.1 60', 9.108 @ 78
2nd run, cutout open, 2.1 60', 9.108 @ 78
I am not lying, and if anything the conditions were better for the second run as the night was progressing. I figured that after that first 9.108 I would at least get a 9.0X later in thte night, but nope, I even left it open through the night and never got better.
So, if there is a difference, the 1/8th mile doesnt show it. I think alot of it must be the driver hearing new sounds
-James
#8
Re: Exchaust Cut-Out... Gain Power?
I think it helps more if you have a more restricted exhaust. My cat back is a custom 2.5" after the y-pipe(no cat), going through a flowmaster big block muffler. On the dyno with it closed it put down 339rwhp/380rwtq. Open, it put down 351rwhp/364.9rwtq.
At the track with it closed, it ran a 13.305@105.4. Open it ran 13.03@107.6. Same conditions, lane, and launch technique.
At the track with it closed, it ran a 13.305@105.4. Open it ran 13.03@107.6. Same conditions, lane, and launch technique.
#9
Re: Exchaust Cut-Out... Gain Power?
I gained 7 RWHP with my cutout open on the dyno, and this is with the bad fuel pump causing the LEAN condition listed in my sig. I don't doubt the 10 HP gain if my car was running right.
#12
Re: Exchaust Cut-Out... Gain Power?
Originally Posted by ScreamnChicken
On the dyno with it closed it put down 339rwhp/380rwtq. Open, it put down 351rwhp/364.9rwtq.
-brandon
#13
Re: Exchaust Cut-Out... Gain Power?
Originally Posted by bdc95ta
so you gained 12 rwhp and lossed 15rwtq???
-brandon
-brandon