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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

GM847 with Magnaflow idle video

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Old 08-07-2009, 07:47 PM
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Default GM847 with Magnaflow idle video
Cold start.

Had Flowmaster on this thing for years and just wanted to change it up. I think it sounds better!

http://www.youtube.com/watch?v=gCzPJxtjrZw
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Old 08-07-2009, 07:54 PM
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Magnaflow F.T.W.

Why is the idle set at 1000rpm???? Reset that thing down to 800.
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Old 08-08-2009, 01:29 AM
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yes agreed, magnaflow is the best quiet enough but loud as a **** when opened up
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Old 08-08-2009, 01:48 AM
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awesome,,cant wait to fire mine up
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Old 08-08-2009, 01:53 AM
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Originally Posted by ss.slp.ls1
Magnaflow F.T.W.

Why is the idle set at 1000rpm???? Reset that thing down to 800.
I don't really like it that low.
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Old 08-08-2009, 02:29 AM
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Sounds great! The idle does seem a bit high though!
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Old 08-08-2009, 08:53 AM
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Sounds like a friggin beast! Gotta love the way that cam sounds. I've had both Flowmaster and Magnaflow and I must say Flowmaster is garbage, good call on the switch.
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Old 08-08-2009, 10:34 AM
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Thanks. Definitely not as loud on the inside now!
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Old 08-08-2009, 11:31 AM
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sounds great!

I have my idle around 1050 and like it

http://s120.photobucket.com/albums/o...Picture044.flv
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Old 08-08-2009, 02:20 PM
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^^^^damn!
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Old 08-08-2009, 03:19 PM
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Originally Posted by robsquikz28
yes agreed, magnaflow is the best quiet enough but loud as a **** when opened up
Perfect def of Magnaflow! I wouldnt change mine for anything..
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Old 08-08-2009, 03:38 PM
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Nice! I wish I knew you were in the market for the Magnaflow because I'm selling mine to go TD's
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Old 08-08-2009, 05:42 PM
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Originally Posted by Elliott's94Z
Nice! I wish I knew you were in the market for the Magnaflow because I'm selling mine to go TD's
Smart man. I just sold my Magnaflow to somebody local, I had to get that single 3" stuff outta my sight haha.
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Old 08-08-2009, 10:07 PM
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Sounds good. I've considered swapping to a GMMG catback instead of my LMII if I do decide to stay NA. LMII will be very raspy if I do NA with LT's and no cat. I like loud cars in case ya'll didn't know
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Old 08-08-2009, 10:30 PM
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Damn that sounds awesome. Making me want to get 847 for my car
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Old 08-09-2009, 07:39 PM
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Here is my True duals with Magnaflow with a little smaller cam. Does not have the popping and rasp that you get with the y-pipe.

Sound clips:
Idle, no cats, cutouts closed


Idle with dual cutouts wide open
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Old 08-09-2009, 07:56 PM
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Originally Posted by wrd1972
Here is my True duals with Magnaflow with a little smaller cam. Does not have the popping and rasp that you get with the y-pipe.
i seen your thread on the fabrication of that setup it came out awesome and sounds awesome too.
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Old 08-09-2009, 08:11 PM
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Originally Posted by C_Rules
i seen your thread on the fabrication of that setup it came out awesome and sounds awesome too.
I have been polishing the pipes that exit the muffler plus fine tuning the fitment where I had to "thread the needle". Hoping to get some new final pics of the whole thing installed soon.

I now have the pics in my sig.
Last edited by wrd1972; 08-09-2009 at 08:54 PM.
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Old 08-09-2009, 09:08 PM
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Originally Posted by marshall93z
I like the little bit of rasp. Yours is probably the most "rumbly" true duals I have heard.

lol
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Old 08-09-2009, 09:27 PM
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Originally Posted by LS1 SPEED
sounds great!

I have my idle around 1050 and like it

http://s120.photobucket.com/albums/o...Picture044.flv
LOL, when you have a "man cam" it NEEDS to be that high.
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