5.3 motor ?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
It is an LS type engine with all the potential of the other Gen III engines. It seems to me that one of the car magazines installed some bolt ons on one, and it responded just as you would expect a Gen III to. Very well.
RACE ON!!!
RACE ON!!!
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Originally Posted by CFI-EFI
It is an LS type engine with all the potential of the other Gen III engines. It seems to me that one of the car magazines installed some bolt ons on one, and it responded just as you would expect a Gen III to. Very well.
RACE ON!!!
RACE ON!!!
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
I wish I had one in my '84 to hotrod. That's about the only engine I'd consider to replace my Crossfire.
The Crossfire is great but I could be persuaded by a nice pretty LS1.
Got one in my Z28 that hauls mule butt. That thing is a super 'happy' engine.
Mine has 78,000 on the clock and runs just like brand new..including the lifter or piston slap noise it made on the day it was brandy new.
Goes away after running about 2 minutes.
BTW,
Horsepower TV pulled theirs out of their SS Camaro this past weekend...
spun rod bearing... can you say 'used and abused'?
The Crossfire is great but I could be persuaded by a nice pretty LS1.
Got one in my Z28 that hauls mule butt. That thing is a super 'happy' engine.
Mine has 78,000 on the clock and runs just like brand new..including the lifter or piston slap noise it made on the day it was brandy new.
Goes away after running about 2 minutes.
BTW,
Horsepower TV pulled theirs out of their SS Camaro this past weekend...
spun rod bearing... can you say 'used and abused'?
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Have that motor in my 02 truck. At 56k miles I cant complain-Like yours, tons of slapping and lifter noise just like it was when I bought it new. No problems. Cool thing is they will handle an overbore sufficient enough to toss an LS1 piston in.
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Originally Posted by cuisinartvette
Have that motor in my 02 truck. At 56k miles I cant complain-Like yours, tons of slapping and lifter noise just like it was when I bought it new. No problems. Cool thing is they will handle an overbore sufficient enough to toss an LS1 piston in.
Last edited by comp; Jan 25, 2005 at 07:10 PM.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Originally Posted by comp
is it the roller noise ????
Le Mans Master
Joined: Apr 2000
Posts: 7,562
Likes: 9
From: B'Ville NY
Cruise-In III Veteran
St. Jude Donor '05
I have the 5.3 in my Silverado that could one day be a rebuild for my vette 
I too have the cold start piston slap, I don't like to drive it for at least a minute in my climate because it just sounds harsh 
I too have the cold start piston slap, I don't like to drive it for at least a minute in my climate because it just sounds harsh
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Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Originally Posted by SmokedTires
I have the 5.3 in my Silverado that could one day be a rebuild for my vette I too have the cold start piston slap, I don't like to drive it for at least a minute in my climate because it just sounds harsh
I too have the cold start piston slap, I don't like to drive it for at least a minute in my climate because it just sounds harsh 
Tempting, isn't it?
POSSE ZR-1 Driver
Joined: Feb 2002
Posts: 3,980
Likes: 138
From: Groton CT
I had an 87 Suburban with a TBI 350, a 96 Suburban with a MPI 350 and now I have an 03 Suburban with the 5.3. The 5.3 flat out is the best out of the three. The power really comes on about 2800 rpm & up. Almost scary the first time I got on it. Now that I'm used to it, I feel the need for "More power". Saving my pennies for this upgrade: http://www.magnacharger.com/gmtruckradix.htm
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
I had originally planned on modding mine when I bought it with a Comp 212/218 cam and some headwork, exhaust, Trailblazer(2600)converter. A buddy of mine has a similar setup in his and I was shocked at the power from that little motor!! For a heavy truck these move well.