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Old 11-24-2009, 03:42 PM   #1
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Default 4 pound lower 2.93 upper

Would a 4 pound lower pulley and a 2.93 upper be to much boost for a stock 2003 cobra motor 21000 miles. About how boost ,hp ,tq
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Old 11-24-2009, 05:04 PM   #2
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Would a 4 pound lower pulley and a 2.93 upper be to much boost for a stock 2003 cobra motor 21000 miles. About how boost ,hp ,tq
More boost=less timing. It's all in the tune/supporting mods.
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Old 11-24-2009, 10:35 PM   #3
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Enough to go into the 9's with a Posi Race Port if I remember correctly
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Old 11-25-2009, 09:59 AM   #4
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Enough to go into the 9's with a Posi Race Port if I remember correctly
And spray.
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Old 11-25-2009, 07:33 PM   #5
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And spray.
no there is a guy that did it without spray. WIth a ported blower, c4, solid, weigth reduciton and some other stuff
His name is badass03 or something like that over on modularfords.com
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Old 11-25-2009, 07:47 PM   #6
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I have a steggy stage 4 port and a 2.76 upper with 4lb lower and its a great combination. I made over 500hp/TQ with this combo.. Kurgan tuned with a JLT ram air intake.. Also recommend 60lb injectors. That is one thingI wish I would have done before the tune was the injectors..
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Old 11-26-2009, 02:04 PM   #7
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Originally Posted by ron View Post
Would a 4 pound lower pulley and a 2.93 upper be to much boost for a stock 2003 cobra motor 21000 miles. About how boost ,hp ,tq
Not at all. Boost is a number, it's all in your tune. These motors are mad to take 900 hp and proven they can take it. Get a street tune and a race tune and your set.
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Old 01-07-2010, 01:32 AM   #8
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Quote:
Originally Posted by Slow99x View Post
Enough to go into the 9's with a Posi Race Port if I remember correctly
I need to keep this quote for my other forums!


OP....Ive found the 2.93/4# to be the ideal setup for my eaton. Ive tried more boost and the car runs exactly the same. seems the boost IS up but the heat and belt slip is also.
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