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Mar 16, 2017 | 05:28 PM

#11

Jetn3

Launching!

Joined: Mar 2012

Posts: 236

Likes: 2

Oh yeah, fuel pump and injectors too

Mar 16, 2017 | 05:29 PM

#12

FFDP

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From: Rogers, MN

I didn't even see the 2006 year listed, those already have the better rods. The weaker rods are from 99-03/04.

If the other motor you get is an older LM7, check the year or see what the rods look like.

Mar 16, 2017 | 06:12 PM

#13

20Silverado06

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Joined: Mar 2017

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Thanks,it'll be daily driven so I'll upgrade to a 4L80E
Once I'm ready I'll keep y'all updated

Mar 16, 2017 | 06:13 PM

#14

20Silverado06

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Thanks

Mar 16, 2017 | 07:14 PM

#15

20Silverado06

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Also do y'all happen to know the cubic inch of an LM7 ??

Mar 16, 2017 | 07:48 PM

#16

FFDP

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From: Rogers, MN

5.3's are 325 cubic inches.

Mar 16, 2017 | 10:31 PM

#17

GMCtrk

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From: Dallas

Quote:

Originally Posted by FFDP

Sloppy mechanics has a 265,000ish mile junkyard 6.0 pullout with a cam swap making over 800whp. It made 992 once or so and he's going for 1000whp on the stock crank with gen 4 connection rods and stock pistons. He's got tons of video's on youtube about it all.

Several on this forum have made 1000 on stock 6 liters.

Synergy made high 800s on a stock 5.3 years ago.

Mar 17, 2017 | 03:48 PM

#18

zero2sixT

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From: Deer park, TX

Quote:

Originally Posted by ezdaar

A bone stock 150k mile 5.3 will eat 10psi and ask for more, 24/7 365.

Yeah, because the piston rings are worn a little bit and allow blow by.

Op,

If you rebuild the 5.3, go with forged pistons. Rods and crank have been proven to handle pretty good power.

Mar 20, 2017 | 04:14 AM

#19

ezdaar

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From: Houston

Sloppy just broke the 1k barrier on stock bottom end and heads.
He finnaly swapped to new head gaskets and arp head studs.

He routinly hit 800+ on 100% oem highly used (250k) pull out engines with rods from random engines, head gaskets used many many times.

Check out his youtube channel, sloppy mechanics. You will be blown away with how much power this guy makes on cobbled together engines.

http://www.yellowbullet.com/forum/sh....php?t=2157841

Last edited by ezdaar; Mar 20, 2017 at 04:52 AM.