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post #1 of (permalink) Old 03-27-2009, 07:27 AM Thread Starter
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workn on my cummins exhaust

itl be 4" from the downpipe elbow back

im to cheap to buy a 3- 4 inch transition join ive got to weld all the cut then weld in chunk of 3" thats flarred on the end and clamp it to factory 3" down pipe then get to fabing the 4 incch pipe. its just cheap generic 4" straight through muffler ill get it out at the dauly fended with a few 45 bends and maybe do slash cut or turn down slightly
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File Type: jpg transition1.JPG (33.7 KB, 0 views)
File Type: jpg truckmuffler.jpg (33.3 KB, 0 views)

89 ifs-sfa truck tranplanted in a 83 K-5 blazer offroad only rig
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post #2 of (permalink) Old 03-27-2009, 01:39 PM
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Quote:
i'm too cheap..
lol aren't we all???

I look forward to results when you've got that done. Temps(if you've got gauges), mpg, etc.

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post #3 of (permalink) Old 03-28-2009, 08:56 AM Thread Starter
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i dont have gauges those i my do a OBDII power programer deal with gauges and power settings fairly soon. well i dunno .

so far results iwth littler driving. my filter is resonating much more at idle, trucks pufn black smoke now. throttle respnse is much quicker and its much louder kinda of a nascar type rumble.

truck acelerates quicker to. i changed my 3"-4" transition with transition i found in factory exaust.

ill see if can get sound clip up later.
Attached Images
File Type: jpg exhaust.JPG (41.0 KB, 0 views)
File Type: jpg tailipe3.JPG (26.9 KB, 1 views)
File Type: jpg tailpipe.JPG (32.3 KB, 1 views)
File Type: jpg tailpipe2.JPG (30.4 KB, 2 views)
File Type: jpg transition2.JPG (37.1 KB, 0 views)

89 ifs-sfa truck tranplanted in a 83 K-5 blazer offroad only rig
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post #4 of (permalink) Old 03-28-2009, 11:48 AM Thread Starter
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sound

trucksound.flv video by Evan03_photo - Photobucket

maybe that will work. for some reason i cant post a vid like i usualy do

one thing i noticed i drove it for day with the 4" and muffler no tail pipe and it had an agressive sound , just didnt have time to weld the short tail pipe up right away. then day later after getn the tail pipe mounted i was shocked to hear it get noticably louder theres 3-4 foot of pipe past the muffler. i exspected it to soke up alittle noice. but it got louder

i cant wait to either buy 4" down pipe or fabb my own. if i fabb it it will be fabbing intensive there will be 3-4 bends all welded and its very time consuming cutting and fitting all the bends together then getn them all welded up leak free. i spent couple hours with soap and water findin leaks in my welds on just the tail pipe and muffler seams . i canot stand leaks they add raspy cackle exspecialy on gas motor

89 ifs-sfa truck tranplanted in a 83 K-5 blazer offroad only rig

Last edited by The_Kid; 03-29-2009 at 10:09 AM.
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