Flow Bench Test of kd4crs/Power Hungry/Gotts Mod

[incogmeo]

From another website .... "The 2004s and early 2005s were known to come from the factory in a near lean condition. Any increase at all was enough to lean them out further. Troyer did some dynoing a long time ago and posted the results. Any additional air on these should be done with care and preferrably with custom tunes."

So my questions are:

1. Is this true ?

2. Is it safe to do the air intake mod to a stock 04 5.4 with a K&N drop in filter and no tuner ?

Thanks.

[Jackpine]

Originally Posted by incogmeo

From another website .... "The 2004s and early 2005s were known to come from the factory in a near lean condition. Any increase at all was enough to lean them out further. Troyer did some dynoing a long time ago and posted the results. Any additional air on these should be done with care and preferrably with custom tunes."

So my questions are:

1. Is this true ?

2. Is it safe to do the air intake mod to a stock 04 5.4 with a K&N drop in filter and no tuner ?

Thanks.

It IS true, but Bill addressed this issue several times. As long as you don't change the environment around the MAF sensor (It's a little thing that sticks out of the driver's side of the intake ducting above and behind the air filter box - there's electrical wires running to it) you won't get a lean condition. The K&N filter is just a filter - it doesn't change the airflow pattern. The homemade CAI is a change way up at the snorkel - it doesn't change the MAF sensor environment either.

So, Bill feels it is safe. I do too.

If you look at the commercial CAI's you'll see they completely replace the ducting all the way to the throttle body. This is a major change to the flow around the sensor and, according to Bill, it really can't see the additional airflow, so, the engine runs lean.

Hope this makes sense.

- Jack

[incogmeo]

Thanks !

[OneTomcat]

I believe I read in a post from Bill a while back that the tow tune runs a little richer than a regular tune. If that is the case, would it be a good idea for those with a commercial CAI and concerned about a lean condition to use the canned tow tune while waiting for their custom tunes?

[Jackpine]

Originally Posted by Groovy Chick

TomCat,

YES! Recently, I've even started putting that information on customer's invoices. By its nature, the tow tune runs richer, so it should help with the lean condition until you get your custom tunes. Just try not to keep your foot on the floor... If you could keep it ½ throttle and above, it would be even better. Of course, that's not always possible... just as a general rule.

Corey, did you possibly mean "or below"? I'd hate to drive around everywhere at full throttle - might get a few tickets.

- Jack

[88Racing]

Originally Posted by JackandJanet

Corey, did you possibly mean "or below"? I'd hate to drive around everywhere at full throttle - might get a few tickets.

- Jack

You could do it Jack, just going to spend more money on brakes

Lars

[Jackpine]

Originally Posted by 88Racing

You could do it Jack, just going to spend more money on brakes

Lars

Funny Lars! Kinda reminds me of a time in San Antonio back in the 70s when we had a rare snowstorm and I was driving to work. The streets were, of course nice and icy, but I grew up in the mountains so I sort of know how to deal with it. However, there was this one guy, who clearly drives with one foot on the gas pedal and the other on the brake. The brake lights were on, the front wheels were locked up and the rears were turning. He had a kind of "panicked" look on his face, because his car was wandering all over the road. I got around him as quickly as I could.

- Jack

[88Racing]

Funny Jack! Real funny!
I have to drive around those types also.

Lars