Borla Header Lawn Mower

[crazyfrenchbiker]

Originally Posted by FT-86 SpeedFactory

Our car does the same thing. The high idle when starting the car produces some extra noise, and once the car idles down it is fine. There is no leak. We have tested this with the car in the air searching for leaks on start up.

Most likely the thin walls of the header passing the noise along. The stock system has thicker walls plus shielding to keep things quiet. The cat also helps with noise.

I think I will need to put it in the air as well and check for leaks.

[crazyfrenchbiker]

Originally Posted by FT-86 SpeedFactory

Our car does the same thing. The high idle when starting the car produces some extra noise, and once the car idles down it is fine. There is no leak. We have tested this with the car in the air searching for leaks on start up.

Most likely the thin walls of the header passing the noise along. The stock system has thicker walls plus shielding to keep things quiet. The cat also helps with noise.

The interesting thing is, I'll start the car, when the car is idling, it's loud, if I move, then press the gas to get it the same RPM, the noise is significantly different and lower.

[shu5892001]

Originally Posted by crazyfrenchbiker

The interesting thing is, I'll start the car, when the car is idling, it's loud, if I move, then press the gas to get it the same RPM, the noise is significantly different and lower.

Because when you first start the car, the car is programmed to warm up the car asap. high retarded ignition and open throttle.

So when you first start the car and it idles close to 2k will be much louder than 2k when you are moving the traffic

[ATL BRZ]

Originally Posted by crazyfrenchbiker

The interesting thing is, I'll start the car, when the car is idling, it's loud, if I move, then press the gas to get it the same RPM, the noise is significantly different and lower.

That's probably because the gas/sound is quickly moving past the gaskets and flanges versus slowly pulsing at idle and pushing out via the leaks. If you think about it in a fluid mechanics way it makes sense.

[ftc~brz]

I thought I had a leak...we checked and found nothing, may have to double check. Either way thanks for the info. I thought I was crazy, and felt bad when we found nothing. I'm gonna feel like a total asshat if we take them off and they aren't warped.

[Huehuecoyotl]

just the way uncatted uel sounds...

[NoFear99]

A month ago, when we heard that Borla had delayed their UEL release date for another month or so because they had found something, I'm sure the warp was the problem they had found.

They shipped their pre production model like that to make economy and avoid big waste.

If only 40% of their customer ship it back to them for a replacement they will save 60% in their pocket !!!

[LavosTRD]

I agree 100% with the opinions that your flanges are probably warped. Borla sent me a warranty replacement and they were warped more than the first one. Same exact noise as the OP. Visual evidence of blow by on the gaskets (stock & grimm speed MLS). Hopefully third time is the charm...

BTW Speedfactory has been an AMAZING help dealing with this. Best customer service I have had in a very very long time. Definitely will have more of my business in the future!!

[ATL BRZ]

Originally Posted by NoFear99

A month ago, when we heard that Borla had delayed their UEL release date for another month or so because they had found something, I'm sure the warp was the problem they had found.

They shipped their pre production model like that to make economy and avoid big waste.

If only 40% of their customer ship it back to them for a replacement they will save 60% in their pocket !!!

Yup, I can believe that.

Originally Posted by LavosTRD

I agree 100% with the opinions that your flanges are probably warped. Borla sent me a warranty replacement and they were warped more than the first one. Same exact noise as the OP. Visual evidence of blow by on the gaskets (stock & grimm speed MLS). Hopefully third time is the charm...

BTW Speedfactory has been an AMAZING help dealing with this. Best customer service I have had in a very very long time. Definitely will have more of my business in the future!!

Shit, my replacement gets here tomorrow. If the flanges are still warped I'm gonna be PISSED!

[GremlinGSP]

I had the same issue with just the nameless axle back and catted OP/down pipe. Its only at idle when first starting up. I put it in gear and back out the garage and its gone.

[2SeeKU]

Originally Posted by ftc~brz

^what speed factory said. Took my car back to @Pure Automotive just to make sure there was no leak and everything checked out fine. Even with stock exhaust car was louder when cold start until it drops down below 1k. I just don't move it until it's warmed up. catless=more stinky anyway! FTW

Any chance you could throw up a video on youtube of your exhaust? I'm wanting to get a similar setup (Borla UEL + stock exhaust). Thanks!

[norsamerican]

yeah a stock exhaust + Borla UEL video would be awesome!

[ftc~brz]

Originally Posted by 2SeeKU

Any chance you could throw up a video on youtube of your exhaust? I'm wanting to get a similar setup (Borla UEL + stock exhaust). Thanks!

already done
http://www.ft86club.com/forums/showthread.php?t=31761

I ordered a special mic for the go pro to get the best sound I can. for now thats what I got

[crazyfrenchbiker]

I took a video of the noise... It's not nearly as noticeable with a camera phone. I'll have to get the real camera out and give it a shot. I also took a few pictures of what looked to me like could be a bent flange.

[ame="http://www.youtube.com/watch?v=ymUb6OOZeo4"]Borla UEL Lawn mower - YouTube[/ame]

In the picture it seems to flare out in these two spots. I have the bolts torqued down rather tight, but it still seems bent to me. Thoughts?

[IMG][/IMG]