Hey,

So after a few months of hesitation and research and reading people's posts on these forums, i finally ordered my spacer and installed it tonight. I ended up going for the 1/2" Copper Isothermal Spacer (Pretty cold in New England in the winter). Having only installed my cold air intake and z-tube on this car, i don't have much mechanical experience. So i tossed around having it installed. But, i opted to attempt the install myself. And overall, it went pretty smooth. I took my time, read the directions carefully and i was able to finish it within 2 hours. At the first startup, the engine ran real rough and stalled. Oops, forgot to re-clamp a hose in the back. Re-started it, and it sounds and ran fine. SUCCESS!

So here's my question though, i'd appreciate any advice. I thought i read about this in a previous forum, but i searched and couldn't find it. I notice a slight and faint wistle sound at about 2.5-3 RPM, but then it goes away outside that range. I don't hear it at an idle. I can't differentiate if its the sound of the larger volume of air being sucked in, or if something is loose. Has anyone else heard this noise? Is there something I need to check?

BTW... i WAS able to fit the stock engine cover back on. and my first impressions is that the butt dyno is VERY pleased

 

the sound is normal if you want to call it that.

 

Hey I am curious why you went with just the spacer?

I bought both the spacer and the lower and recently decided to road dyn them seperately and recetly posted to get other owners opinions.

I am hesitant to post my opinion becaue i do not want to bias the responses.

i still have not gotten used to the whistle sound though.

 

I decided with this setup, a). because of the cold (thats why i chose the copper) and b). i just couldn't warrant spending the extra for the lower when the power gains are not substantial over just the spacer.

The whistle sound... i think its getting better. Like i said, i only hear it between 2.5-3 RPM, but its if i am on the gas a little bit. Driving at a constant speed, i don't hear it. I guess i should also wait for everything to setup too. This is really the first time i've really driven since the install. I just went around the block yesterday after the install.

 

yeah the whistling seems to happen in the same range for me too but I a learning to live with it.

Well since no one has responded to my other thread regarding the testing of each part, MD part that is, seperatly I will add my take on this.

I have recently butt dyno'd the parts seperately and they really seem to perform just as well seperately. I would be willing to concede a slight advantage to the spacer.

I really did not notice any loss with the two combined so I think you'll likely be very happy with just the spacer.

 

Nice!!

 

Yeah, i agree, the spacer is enough to keep me happy for a while. It def screams towards the redline a helluva lot quicker now

I guess i'm still a lil' nervous about the whistle. I don't think its a rattle or anything. I'm almost inclined to pull everything apart this weekend and re-install. Has anyone else had this problem/heard this noise besides Foo G and myself??????

 

Rest assured you/we are not alone with this whistle. When I was bone stock I could hear and thought it would go away after I installed my stillen cai.... didn't happen it only got louder.

If you do a search in the intake forum on the word whistle you will find several other hits.

 

i dunno i have a 1/2" copper isothermal and didnt notice any whistling when i installed mine. infact it sounded quieter overall. i always heard whistling from the z-tube since i installed that. just start her up and make sure theres no leaks that might be causing it.

 

I def did that when i was putting everything back together. I don't hear it at a normal idle... only when driving. Sounds like i'm not alone tho....

 

whistling made by your Stillen HFA.
Mike

 

Possibly... but i didn't notice the whistle prior to the spacer installation....

 

Your drawing in more air volume now - your CAI is making the whistle...mine too...normal fake turbo sound ;-)

Rick

 

lmao lord...see u tommorrow..i bet my noise is louder then urs lol..see u at the marine base i the morning

joe

 

My pop charger does the whistle too. Its an awsome sound lol