straight pipes
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Originally Posted by redford
Not much - your best bet for an increase is to replace your Y-pipe, if you have an older 5.4 or 6.8 engine.
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From: Stephensville WI
Originally Posted by L-N-OR
Yeah...but I have not found a good source for a nice aftermarket 5.4L Y-pipe...? What's out there?
http://cgi.ebay.com/ebaymotors/00-04...spagenameZWDVW
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you need decent back pressure to get torque less back pressure will bring up your HP but torque is a result of backpressure if you want the best bang for your buck do a cat back exhause with a hi-flow cat and i would say that 2.5 inch single pipe would give you good backpressue. truth be told a cat back even with a hi flow cat will only improve sound and maintain power if you want to gain power do a full exhaust with long tube headers and a high flow cat with cat back exhaust.
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Pipes and or Muffler will help
The fact is that if you change one or both, it will drop your stall in your converter. This will help you with gas milage, if you get a stall converter that is just over stock to compensate for the loss of stall, You will see the out-put that you are seeking.
We have been building and matching Torque converters for over 37 years
Home of the Original BOSS HOG torque converters.
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We have been building and matching Torque converters for over 37 years
Home of the Original BOSS HOG torque converters.
ACC Performance
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I've noticed that my Borla catback did nothing for sound. I am inclined to think the stock cat does a lot of mufflling.
I thought about replacing the cat with striaght pipe (redneck, I know), to help with the "sound", but the reason I haven't, is I don't want to lose the scavangeing effect by opening up my exhaust too much...and ultimatley lose low end torque. It's not a race car, but would it be effected the same way?
Same deal with the eBay "Y", (pictured below), sounds great and I could use MPG help, but won't I lose low end torque? Really like to do both...
Really fishing here, but has anyone done the eBay "Y", cat delete (straight pipe), all with a nice catback? What were the effects?
I thought about replacing the cat with striaght pipe (redneck, I know), to help with the "sound", but the reason I haven't, is I don't want to lose the scavangeing effect by opening up my exhaust too much...and ultimatley lose low end torque. It's not a race car, but would it be effected the same way?
Same deal with the eBay "Y", (pictured below), sounds great and I could use MPG help, but won't I lose low end torque? Really like to do both...
Really fishing here, but has anyone done the eBay "Y", cat delete (straight pipe), all with a nice catback? What were the effects?
Last edited by L-N-OR; Nov 6, 2007 at 01:52 PM.
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