Has anyone here done a before/after 1/4 mile run with ROW airboxes?

Not interested in Dyno numbers or 1/4 mile ET as much as there are too many variables there that can alter time........

Without going forced induction, is there an extra 1-2mph available to the this car post headers, catless mids, xpipe, air filters, and tune?

 

A tune is worth it on a non perf c63. You gain 4mph. Other than that your gains are marginal.

 

This is a confusing question.

Are you asking if theres any difference in 1/4 times with a ROW airbox? And if theres any difference in 1/4 times with headers/cat delete/air filters/tune?

 

Sorry, spread it out hoping it would be clear.

First question was-is there MPH trap speed proof via a before and after that adding ROWs to a car added any MPH to 1/4 mile trap speeds.

After that, I was curious if anyone had any trap speed proven additions besides those I listed that helped them pick up 1-2mph, not including forced induction.

 

Cams and head work will net you some , nitrous quite a lot...

 

No Row boxes dont gain et or trap.
renntech boxes gains
groupM and JLmotoring front ram air portion gains .
Weight reduction will get u et and trap depention how much u take out.

 

Row boxes do make hp gains minor but gains around 5 or so paired with high flow filters 5 to 10 prob will not see a change in 1/4 mile with just row boxes. Tune and headers will def net you big gains in hp and higher trap speeds

 

No, they do not. My car made exactly 0 more horsepower with the row boxes.

 

Why are there dyno charts on other cars with gains then? And why does Weistec make them a required part for their supercharger kits if they are the same airflow as us spec?

 

Think it has more to do with air sampling coming into the mafs than performance.

 

The more I analyze what is going on with others time slips on this site, I believe it may be as "simple" as a C63 trapping at 119-120mph requires better grip and better launch techniques to take it beyond the 11.8/11.9 ET barrier. I also think that extra 1-1.5mph may come from traction happening a bit quicker and not as much wasted momentum time from lack of grip.