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'09 5.3 on the dyno again

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Old 09-28-2009, 08:35 AM
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Originally Posted by blackvmax07
bad *** numbers, thats with the 6l80 right?
nope, its through a built 4l60 and stock convertor..
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Old 09-28-2009, 09:01 AM
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Originally Posted by broke1
Wonder how much of the gains are to do with the intake?Besides the dod,thats really the only difference between the older 5.3's and the newer ones...
The New 5.3s have 243 heads, alot bigger than the previous 862s....

Originally Posted by norris_83
still the stock 5.3 intake!
The new trucks have the 87mm TB and alot bigger intake....
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Old 09-28-2009, 10:50 AM
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Nice numbers!!! What is this in?
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Old 09-28-2009, 04:32 PM
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Originally Posted by BlackGMC
The New 5.3s have 243 heads, alot bigger than the previous 862s....



The new trucks have the 87mm TB and alot bigger intake....
nice to know

how about p&p those heads and if i milled them 0.025 cm??

what should i expect
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Old 10-01-2009, 10:04 PM
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Originally Posted by slo-rod
Nice numbers!!! What is this in?
on an '09 Silverado Single Cab
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Old 10-02-2009, 12:02 AM
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my 07 5.3 put down 414 with some prc heads. yup they make power
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Old 10-02-2009, 12:14 PM
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nice!! you got the dyno? I'd like to see the curve.. what cam as well do u have?
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Old 10-12-2009, 11:37 PM
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dam good numbers
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Old 10-12-2009, 11:46 PM
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so much potential on these LY5 motor's.. . . prob see 400+ with some head work/ why don't you P&P ur 243 all the way and get a VAlve job/..
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Old 10-14-2009, 04:29 PM
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to add to blackgmc. they new 5.3's have flat top pistons also, yielding higher compression. plus the rods are beefy coompared to the older ones.
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