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If you were to build up a GenIII truck motor from scratch with these goals in mind...

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Old Feb 12, 2002 | 09:26 PM
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Default If you were to build up a GenIII truck motor from scratch with these goals in mind...

What would you do?

Let's say you have a 5.3L , 5.7Lor a 6.0L block...

If you were to start from scratch, and try to build up as well-rounded of truck engine for every day use, what would you do?

Would it be possible using the 5.3L or 6.0L block as a base to do the following:

1.) Have a very flat torque curve, but produce at least 300lbs@3000rpm... say have it peak at about 400lbs@4000 or so.

2.) be reliable enough for every day use

3.) Not cost you an arm and a leg to bu ild

What could you do to give you a motor like this? What are the major choices you would have to make to acheive the goals, and what are the trade-offs? What would you think a motor like this would cost?
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Old Feb 13, 2002 | 08:28 AM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

I would use a 2001+ 6.0 engine and basically copy what Nineball did to his LS1, to produce a ~382 cubic inch all-bore 6.0 iron block.

http://users.ev1.net/~ynot_dv8/components.htm

It could probably be done for under $5-6K.
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Old Feb 13, 2002 | 01:26 PM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

I vote for what 99Redhawk said. I'm kinda in the same boat wanting to know this info. I have a 4.8/5.3 long block (4.8 as built) that I am going to break down soon and rebuild. I'm also looking for sugestions, I want to do it with what I have. But, I also may go for a 5.7 block and reuse my heads and intake with a little head work of course.
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Old Feb 13, 2002 | 04:22 PM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

99redhawk where can i get the 4and1/8 or the 4and1/4 crank from the largest ive seen for sale is 4"crank thanx for ant help
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Old Feb 13, 2002 | 07:04 PM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

Lunati makes all the custom cranks..They make both of these sizes all the time..the 6 litre block is sooooooo ripe for a crank..
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Old Feb 13, 2002 | 07:06 PM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

found this on the net, thought it was pretty cool <img src="gr_stretch.gif" border="0">

http://members.fbody.com/phil99ta/LS1SIZE.xls

<img src="graemlins/gr_hail.gif" border="0" alt="[hail]" /> c5r bored .3 over w/ a 4.25 crank, heh... THATS some power. how come nobody has done that yet?

[ February 13, 2002: Message edited by: really slow truck ]</p>
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Old Feb 13, 2002 | 07:29 PM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

can't get that link to work for me.
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Old Feb 13, 2002 | 08:00 PM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

you have excel right (its an excel workbook)? it worked on me and also on a friend of mine <img src="images/icons/confused.gif" border="0">
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Old Feb 13, 2002 | 08:20 PM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

what does it mean when it says "Stock Crank Offset ground"??

just out of curiousity how much could u stroke our 5.3L before it would need to be rebalanced and what not, or do u have to do that no matter what?
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Old Feb 13, 2002 | 09:19 PM
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Default Re: If you were to build up a GenIII truck motor from scratch with these goals in mind...

Offset ground means that the stock crank journals are ground smaller. only one side of the crank is ground into, effectively making the stock crank into a smaller diametered stroker crank. This also requires new rods.

I think anytime you add / replace anything with a different wieght or size, you need to have the assembly balanced.
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