hi flow cats ???
#11
Thanks in advance for indulging my curiosity.
#12
^ thats correct sort of lol
Before the oem cat started to affect ets lets say I was running 15.0 on avg.
As oem cat started plugging my last time at the track it had slowed to 15.15
Fresh h/f cat, ran 14.68 which was .32 faster than the avg prior to plugging or .47 faster than last time out.
Hope that makes sense
Edit, btw, dont expect the same gains with a 5.2 they seldom respond like a 5.9 does but there is still potential gains to be had
FYI, Ive taken my Indy down the 1/4m well over 1000x
Before the oem cat started to affect ets lets say I was running 15.0 on avg.
As oem cat started plugging my last time at the track it had slowed to 15.15
Fresh h/f cat, ran 14.68 which was .32 faster than the avg prior to plugging or .47 faster than last time out.
Hope that makes sense
Edit, btw, dont expect the same gains with a 5.2 they seldom respond like a 5.9 does but there is still potential gains to be had
FYI, Ive taken my Indy down the 1/4m well over 1000x
Last edited by RM_Indy; 08-04-2010 at 07:37 PM.
#13
Before the oem cat started to affect ets lets say I was running 15.0 on avg.
As oem cat started plugging my last time at the track it had slowed to 15.15
Fresh h/f cat, ran 14.68 which was .32 faster than the avg prior to plugging or .47 faster than last time out.
Hope that makes sense
As oem cat started plugging my last time at the track it had slowed to 15.15
Fresh h/f cat, ran 14.68 which was .32 faster than the avg prior to plugging or .47 faster than last time out.
Hope that makes sense
Thanks for clarifying things, RM_Indy!
#14
Do you have to get etested?
If no, straight pipe it for even more gains.
After the h/f swap I found out I had debris in my chambered catback so I yanked it(1.5yrs old ughh)
Magnaflow 3" glasspack added with 3" side exit ahead of the axle. Went with it cause its straight through (combined sound = wicked)
20k miles or so later h/f #1 collapsed.
While driving all of a sudden it sounded like a jet so I let off then nailed it.
Shot the debris right out the side exit(hit car driving beside me).
Upon returning to the track again I gained a further .15 (avg prior to ets slowing again)
Cat deleted altogether I bet I would of seen .6 better et over oem cat before it started to fail.
This is at low race wt so dont expect quite as dramatic a result
BTW, the cat collapsed & shot out the side exit 5days after passing an etest.(wasnt sure if it would pass)
Moral of the story?
Cats suck hp big time & dont drive beside an Indy with loud exhaust lmao
If no, straight pipe it for even more gains.
After the h/f swap I found out I had debris in my chambered catback so I yanked it(1.5yrs old ughh)
Magnaflow 3" glasspack added with 3" side exit ahead of the axle. Went with it cause its straight through (combined sound = wicked)
20k miles or so later h/f #1 collapsed.
While driving all of a sudden it sounded like a jet so I let off then nailed it.
Shot the debris right out the side exit(hit car driving beside me).
Upon returning to the track again I gained a further .15 (avg prior to ets slowing again)
Cat deleted altogether I bet I would of seen .6 better et over oem cat before it started to fail.
This is at low race wt so dont expect quite as dramatic a result
BTW, the cat collapsed & shot out the side exit 5days after passing an etest.(wasnt sure if it would pass)
Moral of the story?
Cats suck hp big time & dont drive beside an Indy with loud exhaust lmao
#15
Yep. Otherwise I'd pitch the cat because it's a fire hazard and just something else to go wrong.
Oh heck no. My truck's getting heavier as time goes on rather than lighter. But the only significant weight adder from here on out will be the Buckstop Outback bumper and winch inside it.
The reduced quarter time you report, though, is probably in the neighborhood of 20RWHP or a tad better, wouldn't ya think?
I don't drive beside anything with a loud exhaust except when I absolutely have to. Same for bonehead bass thumpers whose hearing will be worse than mine when they're my age. If I wanted that much noise in the cab I'd have kept the second wife around.
I'm a bit concerned now about the new cat. I really don't want to have to fool around with it for another 100k once it's on.
Oh heck no. My truck's getting heavier as time goes on rather than lighter. But the only significant weight adder from here on out will be the Buckstop Outback bumper and winch inside it.
The reduced quarter time you report, though, is probably in the neighborhood of 20RWHP or a tad better, wouldn't ya think?
I'm a bit concerned now about the new cat. I really don't want to have to fool around with it for another 100k once it's on.
#16
#17
URU
59k miles fried 3 cats(2h/f), 1/2 way through the 4th when I yanked my exh.
As hp goes up, cat lifespan goes down.
Running 1/4m passes with cold motor, pushing 5400rpm shifts (5.9-6k rpm now))
As well as driving back roads doing testing n practise I drop cats 10x faster than normal so no worries
Yes, probably close to 20rwhp gained
CPT, with 3 cats Im thinking youve taken a HUGE hp/trq hit.
Dropping all those cats plus the fact you have some decent mods, think it would be a win/win senario.
59k miles fried 3 cats(2h/f), 1/2 way through the 4th when I yanked my exh.
As hp goes up, cat lifespan goes down.
Running 1/4m passes with cold motor, pushing 5400rpm shifts (5.9-6k rpm now))
As well as driving back roads doing testing n practise I drop cats 10x faster than normal so no worries
Yes, probably close to 20rwhp gained
CPT, with 3 cats Im thinking youve taken a HUGE hp/trq hit.
Dropping all those cats plus the fact you have some decent mods, think it would be a win/win senario.
Last edited by RM_Indy; 08-04-2010 at 09:25 PM.
#18
A little OT,
Anyone besides pacesetter make a Y pipe to replace the factory Y in a 2001 fed emmissions?
I had heard the pacesetter Y pipe isn't very good. My cat is a magnaflow 3" si/so.
Wondering myself how much I might be losing to that stock Y with my current configuration.
Anyone besides pacesetter make a Y pipe to replace the factory Y in a 2001 fed emmissions?
I had heard the pacesetter Y pipe isn't very good. My cat is a magnaflow 3" si/so.
Wondering myself how much I might be losing to that stock Y with my current configuration.
Last edited by aim4squirrels; 08-04-2010 at 09:51 PM.
#19