6.0 help
11-18-2003, 02:22 PM
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6.0 help Has anyone around this board built a 6.0 motor. I am looking for a little help as far as what I should be looking for. Crank wise did you stay stock or go to an aftermarket crank. What heads did you use? etc.
11-18-2003, 04:52 PM
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I had a 427 iron motor with 4.060 bore and 4.125 Callies (piece of junk crank)! The stroke was too much for that bore on the 6 liter motor and geometry of motor was way off causing MAJOR PROBLEMS! Words of wisdom=stick with a LUNATI 4.00 crank and no bigger and go with 4.030 overbore for 409 classic Chevy cubes and lots of strength and room for rebuilds in the cylinder walls.
Would be a solid stout performer matched with aggressvice cam and ported stage III LS6 heads and all necessary bolt ons would give you a 10 sec. something street car. Throw on the gas or other F/I and you have yourself a 9 sec. something potential street/drag machine.
GOOD LUCK!
Would be a solid stout performer matched with aggressvice cam and ported stage III LS6 heads and all necessary bolt ons would give you a 10 sec. something street car. Throw on the gas or other F/I and you have yourself a 9 sec. something potential street/drag machine.
GOOD LUCK!
Last edited by MTI 427 C5 Roadster; 11-18-2003 at 07:48 PM.
11-18-2003, 08:00 PM
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Levi,
I am certainly no mechanic and i know many LS1 people are runnnig around with this big crank in resleeved alum. LS1 motors and in my opinion, all stroker motors seem to be using too much oil and i wonder if the big crank is part of the reason.
I was also told by a top tuner that the overbored iron motors do have a different configuration/geomerty vs. an alum. engine. Also, many tuners over the last year or two told me they would never go with more than a 4.00 stroke in a LS1 motor although many do and seem to be happy so far.
Hope that helps a little.
I am certainly no mechanic and i know many LS1 people are runnnig around with this big crank in resleeved alum. LS1 motors and in my opinion, all stroker motors seem to be using too much oil and i wonder if the big crank is part of the reason.
I was also told by a top tuner that the overbored iron motors do have a different configuration/geomerty vs. an alum. engine. Also, many tuners over the last year or two told me they would never go with more than a 4.00 stroke in a LS1 motor although many do and seem to be happy so far.
Hope that helps a little.
11-18-2003, 11:26 PM
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I have a 4.075 offset ground lunati crank. Can't be happier with it. No excessive oil burning, and good oil pressure. All the tolerances are to spec, and 0 balanced the rotating assembly. The motor kicks some serious ***. I am using a set of stage 2.5 5.3L. I would look into some ls6 or 6.0L heads if you are going with a bigger cube motor.
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11-19-2003, 01:20 AM
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Great that is exactly what I was looking for. BTW I know you can't tell me exactly but what do you think a 409 with the SLP head and cam package, LS6 manifold, and long tubes would push HP and Torque wise. I am looking to throw this motor in a 1969 Camaro and I need it to be streetable. You think it will be reliable or need a rebuild every 70,000 miles. Granted this wont be an everyday car but that doesn't mean I want to be fixing something all the time. Thanks again for all the great info.
11-19-2003, 02:02 AM
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Originally Posted by Big_Steve
I am looking to throw this motor in a 1969 Camaro and I need it to be streetable. You think it will be reliable or need a rebuild every 70,000 miles. Granted this wont be an everyday car but that doesn't mean I want to be fixing something all the time.
With regard to these large stroke LS1's, anytime you go over the 4" stroke, the rod angle is getting out-of-hand. For instance, with a 4.125 stroke, you're going to get a 19+ rod angle with any rod 6" over over. This ain't gonna work for a motor expected to lead a long life.
So, stay with a 4" or less stroke and you should be in good shape, assuming rational treatment of the motor...