KnN drop in filter dyno results

[8400cc]

I've heard that people are saying that this thread is just a diversion. I personally find that Stormy Daniels claim is far more believable than K&N's...and frankly a lot more interesting

BAHAHAHAHAHHAAHAHAHAHA, I love it !!!

[Reaper]

I decided to bite the bullet as well and ordered a drop in K&N for my car after seeing some of the results here. Im not expecting a big seat of the pants gain but it does work and its easy HP

[Jack B]

I decided to bite the bullet as well and ordered a drop in K&N for my car after seeing some of the results here. Im not expecting a big seat of the pants gain but it does work and its easy HP

You are right, there have been way too many posts about a plus ten hp gain. Everyone of those posts cannot be wrong.

[Bruce H.]

You are right, there have been way too many posts about a plus ten hp gain. Everyone of those posts cannot be wrong.

Trackaire may have explained it in post 15 quoted below...

Regarding the potential gains the K&N filter might give....you have to realize that the rear end gear oil will free up horsepower when it gets hot....the hotter, the less drag it creates. Doing 3 dyno runs and letting the car sit for 30 minute really heat soaks the rear end and makes the oil very hot (max pulls but not air flow or cruising to cool the oil down). If you really want to be sure the K&N is giving you 10 hp, then start the dyno test with the K&N, do the 3 runs and let the car cool down for 30 minutes and then dyno the stock element filter element. If you see the hp drop by 10 hp, then the K&N might very well free up some horsepower. But if the horsepower goes up 10 hp then it doesn't matter which filter you use since both provided the exact same results when run both ways.

On the dyno, to really prove something is working when doing back to back same day testing, you have to run the test in both directions to avoid plus or minus accuracy errors when dealing with something like a 1% power gain up or down.

I remember seeing a video with Dick Winkles where he claimed rear end oil temps on a Gen 5 was worth like 9 hp on the dyno....maybe somebody can find it and post it to verify that my numbers are correct.

[Jack B]

Trackaire may have explained it in post 15 quoted below...

Regarding the potential gains the K&N filter might give....you have to realize that the rear end gear oil will free up horsepower when it gets hot....the hotter, the less drag it creates. Doing 3 dyno runs and letting the car sit for 30 minute really heat soaks the rear end and makes the oil very hot (max pulls but not air flow or cruising to cool the oil down). If you really want to be sure the K&N is giving you 10 hp, then start the dyno test with the K&N, do the 3 runs and let the car cool down for 30 minutes and then dyno the stock element filter element. If you see the hp drop by 10 hp, then the K&N might very well free up some horsepower. But if the horsepower goes up 10 hp then it doesn't matter which filter you use since both provided the exact same results when run both ways.

On the dyno, to really prove something is working when doing back to back same day testing, you have to run the test in both directions to avoid plus or minus accuracy errors when dealing with something like a 1% power gain up or down.

I remember seeing a video with Dick Winkles where he claimed rear end oil temps on a Gen 5 was worth like 9 hp on the dyno....maybe somebody can find it and post it to verify that my numbers are correct.

That is conjecture, IMHO, the increased heat sink and higher IAT (in a second set of pulls) will do more to decrease hp than gear oil will increase the power. I am not taking sides, however, since 2013 there have been at least six dyno comparisons, all showing an approximate 10 hp gain, one or two is luck, six is not. Lastly, wouldn't it make sense that a short travel distance to the dyno would bring the diff fluid up to operating temps.

I was originally on your side, but, there is too much evidence pointing in the other direction.

[catwood]

If they only made a Vipair for a Gen 5.

[Cobra723]

That is conjecture, IMHO, the increased heat sink and higher IAT (in a second set of pulls) will do more to decrease hp than gear oil will increase the power. I am not taking sides, however, since 2013 there have been at least six dyno comparisons, all showing an approximate 10 hp gain, one or two is luck, six is not. Lastly, wouldn't it make sense that a short travel distance to the dyno would bring the diff fluid up to operating temps.

I was originally on your side, but, there is too much evidence pointing in the other direction.

It was a 45 min trip to the dyno for me, gear oil heating up freeing up horsepower argument definitely wouldn’t apply here. It was very long trip for Paul, he drove over an hour to the dyno.

[Jack B]

It was a 45 min trip to the dyno for me, gear oil heating up freeing up horsepower argument definitely wouldn’t apply here. It was very long trip for Paul, he drove over an hour to the dyno.

You are wrong a lot of us have dyno's in our garage, joke of course.