I didn't have much I could do with the T/A for different numbers, so I decided to run it w/o the air filter. My T/A is 100% stock, with a Lid. No tune-up, or anything. 4L60E

The air filter was a new Fram

Dyno w/ filter = 283.82 RWHP/308.45 RWTQ

Dyno w/o filter = 288.70 RWHP/308.23 RWTQ


Hmmm, just thought this would be good info if anyone has ever wondered.

 

nice...

i'm sure there are a few guys on here who will argue it...

 

Good info

 

I got dyno sheets to prove it

 

So which is it? :P

Were the runs made back to back or was the car sitting for a while between pulls?

 

Yeah, stock with a lid, is kinda not stock I guess.

They were within 3 minutes of each other.

 

"I got dyno sheets to prove it"

well that doesn't mean much neccesairly..


isn't it Psychocabbage that has dyno sheets to prove that he lost hp going from stock paper to a K&N filter??

which is basically the same thing...less restrictive filter.

 

I have actually read quite a few places that paper filters flow just as well, if not better, than K&Ns. I don't have any dyno references, but Psycho's claim would support that.

 

There is no way you could out dyno my LT1. How dare you?!?

 

It's very rare to have two back to back dyno runs where the second run isn't higher than the first. So you really haven't proved anything.

 

In this instance, we ran it three time with the filter, had steady HP at 283. And on the fourth run, I decided to pull the air filter for the heck of it. And pulled the 288.

BTW, these are CORECTED SAE numbers. Best uncorrected raw RWHP/RWTQ was w/o filter run 299/318

The dyno sheet comment was sarcasm, but if anyone doubts me, then fine. There were about 25 other people there to testify, I wouldn't just make this up.

Also, my A/F on the 3 runs WITH filter was about 13 WOT, W/O the filter, it ran about 13.2.

Take the info for what it is worth.

 

It makes sense that he would gain power without the filter, doesn't it? I mean yeah, an air lid is less restrictive than the stock air box, but an air lid without a filter in it(am I correct?) would be even less restrictive than one with a filter in it. Going from a filter there to no filter there= less restriction=more power IMO. Kinda like going from stock manifolds to long tube headers because the stock manifolds are more restrictive. Just my $0.02.

 

http://www.supahrich.com/dyno.JPG

As you can see, the 1st and 2nd runs were within a minute of each other. I lost power on the 2nd pull. For those two runs the hood was down... 3rd run was after letting the car sit for 7 minutes and the hood was up. Guess I'm one of the few

I still don't see how a K&N filter would actually slow you up... maybe with the LS1's it isn't as much of a power adder as on other motor's but it wouldn't make sense for it to cause you to lose power over a paper filter.

Guess it's one of those mysteries that'll never be explained Some people have better luck with paper filters, others don't. I'm sure there are so many factors that could cause the phenom to occur.

 

Sorry about the negative comment. I read your first post and assumed you had only made the two dyno pulls. I guess this is what happens when somebody assumes something.

 

Could very well have to do with the shape of the filter. LS1 is a big flat panel vs others with round or conical filters.