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Downpipes
- Thread starter blkst
- Start date
Yes, tuning wise I'm seeing good gains with downpipes. The st seems to be picking up 3-4 lbm/ min of air flow, which is consistent with 20-30hp. Of course you'll only see the gains of you are pushing the limits of the turbos. Even if you are not pushing them to the max it will still help efficiency and heat. You'll be able to make a little more power on a same boost level.
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Ok so after 2 days of driving with the Downpipes installed (with Borla S-Type exhaust)... when cruising at 55-75mph anywhere between 6th and 10th gear and just barely stepping on the gas to maintain speed or uphill acceleration (below 2500 RPM's) sounds like the whole exhaust system is going to rattle off! And also sounds like a squeaky cricket noise coming from the flex pipe at low RPM
Anyone else experiencing this??? It was already doing it slightly with just the exhaust (no downpipes)...but now it's substantial with the High Flow Cats on there. (*Also happens on a cold start)
If you give it enough throttle in 6th or enough to downshift to 5th and get above 2500 RPM...it goes away and sounds sweet AF...But this can't be right.
Has to be something you can do to dampen that low RPM vibration to the entire exhaust system.
Any feedback is appreciated...
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Anyone else experiencing this??? It was already doing it slightly with just the exhaust (no downpipes)...but now it's substantial with the High Flow Cats on there. (*Also happens on a cold start)
If you give it enough throttle in 6th or enough to downshift to 5th and get above 2500 RPM...it goes away and sounds sweet AF...But this can't be right.
Has to be something you can do to dampen that low RPM vibration to the entire exhaust system.
Any feedback is appreciated...
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Sounds like it’s time to go through the exhaust end to end looking for loose connections, things that are touching and make sure the bellows in the expansion joints aren’t split anywhere. Also look for things that are close to touching since the exhaust will grow in length as it heats up.
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PSA FOR EXHAUST RATTLE For anyone experiencing exhaust rattle - NHTSA TSB # 10179152.
Ford service (should) take care of it OR for the DIY Guy... A 90mm 3.5" Worm Gear Clamp tightened to 2.7 NM on each Flex Pipe.
(After Market Exhaust & SPD Downpipes exacerbate the rattle and make it completely unbearable)
** Footnote for all Borla Exhaust owners (and potential owners) there are 2 points of contact above each muffler; a bolt and screw that can be baffled by measuring and then (drilling and mitering to cover) an inexpensive exhaust bushing and using a silicone adhesive to mount over the screw and bolt.
(Example)
https://shop.namelessperformance.com/exhaust-hanger-bushings/?sku=NPBU
*Or another fix is to dent the top of the muffler with a hammer so it doesn't hit/rub against the bolts... but whatever you're comfortable with.
Sent from my SM-N986U using Tapatalk
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1
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PSA FOR EXHAUST RATTLE For anyone experiencing exhaust rattle - NHTSA TSB # 10179152.
Ford service (should) take care of it OR for the DIY Guy... A 90mm 3.5" Worm Gear Clamp tightened to 2.7 NM on each Flex Pipe.
(After Market Exhaust & SPD Downpipes exacerbate the rattle and make it completely unbearable)
** Footnote for all Borla Exhaust owners (and potential owners) there are 2 points of contact above each muffler; a bolt and screw that can be baffled by measuring and then (drilling and mitering to cover) an inexpensive exhaust bushing and using a silicone adhesive to mount over the screw and bolt.
(Example)
https://shop.namelessperformance.com/exhaust-hanger-bushings/?sku=NPBU
*Or another fix is to dent the top of the muffler with a hammer so it doesn't hit/rub against the bolts... but whatever you're comfortable with.
Sent from my SM-N986U using Tapatalk
Sent from my iPhone using Tapatalk
PSA FOR EXHAUST RATTLE For anyone experiencing exhaust rattle - NHTSA TSB # 10179152.
Ford service (should) take care of it OR for the DIY Guy... A 90mm 3.5" Worm Gear Clamp tightened to 2.7 NM on each Flex Pipe.
(After Market Exhaust & SPD Downpipes exacerbate the rattle and make it completely unbearable)
** Footnote for all Borla Exhaust owners (and potential owners) there are 2 points of contact above each muffler; a bolt and screw that can be baffled by measuring and then (drilling and mitering to cover) an inexpensive exhaust bushing and using a silicone adhesive to mount over the screw and bolt.
(Example)
https://shop.namelessperformance.com/exhaust-hanger-bushings/?sku=NPBU
*Or another fix is to dent the top of the muffler with a hammer so it doesn't hit/rub against the bolts... but whatever you're comfortable with.
Sent from my SM-N986U using Tapatalk
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