Haha I assure you it is not in my head, This is not my 1st rodeo either and I feel I am quite in tune to my daily driver and notice even the slightest change in her behavior however I suppose a few other people would have to try it and report results to confirm or put my car on the rollers.

Almost everybody in this thread has not even tried this so their opinions are baseless so for the love of god someone please bring facts to the table and not loosley based opinions or wacked out theroys .

 

Yeah pretty much the only way to prove it is if someone else does this. I have a spare intake so i might do this for giggles.

 

I have always wanted to do something like this but I have always read against it. Now I have second thoughts.

 

I presented facts, you brought the "loosley based opinions or wacked out theroys" . I'm glad other people are chiming in though it's good to discuss this sort of thing, if you agree or not that it's a good idea.

Your analogy of people who haven't tried it are not some how allowed to form an opinion makes no sense to me either. I can read about someone who decided to pour a can of beer in their oil and claimed a 5 HP gain, doesn't mean I can't see that's a bad idea without trying it.

 

Ok so the people who have not tried this are strictly against it because they THINK they know what's best?

What facts have you presented other than the chamber is for acoustic tuning and is for sound control?

One thing is for sure I will most likely never share any info with this community again, I wondered what happened to the old school guys who used to post all kinds of good info back in the day and now I see why they all vanished and went to other forums.

 

Okay now while I think this bickering needs to stop, I do have a couple things to point out. Yes Lexus has some of the best minds in the biz..but what are their minds focused on? Power? Or reliability and softness? If this Helmholtz (sp? I'm on a blackberry) resonator is so revolutionary, why aren't aftermarket intakes utilizing them? While I'm doubting 5 hp increases, it seems feasible to me that this could have some kind of positive effect on engine response. But seeing as how OP has a cone filter which probably worked against him, I'm interested to see someone do this on their bfi sc3/4.

 

Curious why you would say the cone filter worked against me?

 

Well the after-market intakes are known to lose power and are generally just generic style tube/filters that are mass produced. Not much technology there. The helmholtz resonator is however used in numerous after-market Nissan Z exhausts recently which is pretty cool. They are using it mostly for cancelling certain sound frequencies though.

 

Just having a conical filter attached to your stock intake is gonna pull in the dry air from the engine bay. Cooler air is more stable and denser meaning more power. Its been proven that the stock intake box in bfi form is more benificial and pulls in cooler air as opposed to just a cone filter.

 

So in your professional opinion I lost hp by doing this? This is getting more out of control by the minute!
This is worse than a Honda forum.

I disagree on the hp part as this for sure made more hp than when it was bfi'd there is simply more volume and less turbulent air flow here vs the bfi.

Explain why it makes more hp then because it for SURE does no doubt about it.

Maybe if one of you guys tried this then you could report back some real world results as well.

Although the car is turd slow it became much more lively and responsive once I did this and remember I was not really looking for any hp in the 1st place .

This will be my last post on this subject as enough info has been posted to let people judge for their selves.

Anything below this post is most likely an attempt to create an arguement and knock down what happened in the 1st thread which everything is explained in the topic and 1st post.

I have put my money where my mouth is what more do you guys feel you need than that?

May the bickering/hating continue.................................

 

First of all im not hating or putting anything you did down.

I only commented on the fact that people will ussualy ask questions and be skeptical when hearing about things that they havent done b4.

One thing, you say the sc400 is 'turd' slow and this 5hp gain made it much more lively and responsive?

5hp will barely be noticable IMO and will definitely not cause your car to be 'much more livelier and responsive'.

20 -30 hp sure, 5 hp no i dont think so.

Thanks for sharing

 

Not to mention he said a big factor being that before the "mod" he could barely spin the tires and after he was spinning half way through 1st gear. That to me sounds like a gain in torque not HP which also made me question the claim.

 

ok here is the deal i tested this on my 92 remember I have KV afm so if there was going to be drivability issues from the air turbulance after removing the resonator I would notice it.

I tested this with my BFI and a home made rigged cone filter


mirin my set up?

this is what I found with the cone set up my acceleration from a stop to around 35 felt faster then with the bfi and resonator attached how ever acceleration after 40+ seemed slower

did the same tests with my BFI no noticable accleration difference until I was up to speed where the BFI actually works it's best.

Edit: for the above statement so there is no confusion, there was no acceleraration difference between the cone and BFI in off the line to around 35mph with the resonator removed

There seemed to be a slight hesitation in throttle responce with both cone and BFI with resonator delete while cruising then going WOT along with just reving the motor from idle to WOT so it seems that it also acts as a reserve air chamber as has been stated.

side note the removing the honeycomb part at the front of the AFM housing made the car run like ish, I only removed that part to see if air turbulance would affect how the KV AFM would measure air, you can however remove the piece that holds the honeycomb part in place for a very slight increase in piping diameter with no issues.

These are just my findings take them as you will

 

You seriously need to take the stick outta your ***. Dyno your car. Prove me wrong. 95 percent in your head. From what I've seen read and heard on these cars, bfi > cone filter. Besides you're sucking in hot air. Good luck making more power with hot air :/

 

More then likely, or the under hood temp was not up to it's normal temp during the first few pulls (something I didn't factor in the tests)

I agree on the BFI set up thats why I'm running it, I just wanted to share what I found with my testing and I'm aware that with out dyno numbers my findings are worth nothing and of no value what so ever.