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Late Model Racecraft Gen V LT1 Cylinder head development is underway!

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Old Jul 14, 2013 | 02:43 PM
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Late Model Racecraft is infamous around these parts
Late Model Racecraft Gen V LT1 Cylinder head development is underway!

We have received our LT1 castings from GM and have already flowed/torn down and started grinding on them. Overall we should have numbers very soon.

Our before numbers were as follows:

Was flowed on a 4.060 bore at 28" of water with a Untouched port and valve job.

lift Intake Exhaust
.200 134 120
.300 204 164
.400 258 193
.500 291 204
.600 285 208
.650 291 210

As you can see our bench seems to read lower than others. 1 other well known shop out there besides us posted 318 as there stock numbers. So dont take final Flow numbers to make decision on whos is best. Flow benches are just like dynos. Used for tuning tools, and to see gains.




And now for some pictures





And now the fun part begins!

Roughed in Exhaust port









 
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Old Jul 15, 2013 | 12:29 AM
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You guys do great work.....Can't wait to see what you all come up with on this motor....
 
Old Jul 15, 2013 | 11:41 AM
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Originally Posted by Searcher
You guys do great work.....Can't wait to see what you all come up with on this motor....
Thanks, It is looking good so far!

Here is some Updated flow numbers (still not finished)

Lift Intake/Exhaust
.200 137/116
.300 208/154
.400 270/197
.500 310/228
.600 331/245
.650 335/252
.700 340/257
.800 345/260


Still have quite a bit more development to do, this was first attempt.
 
Old Jul 15, 2013 | 02:30 PM
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Anyone besides SAM doing flat plain cranks for the LSX motors?
 
Old Jul 15, 2013 | 03:42 PM
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Late Model Racecraft is infamous around these parts
Originally Posted by Searcher
Anyone besides SAM doing flat plain cranks for the LSX motors?
SAM never did one, it was lingenfelter. And im sure Bryant or Winberg could make you one if you were looking to do so.
 
Old Jul 22, 2013 | 12:15 AM
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Originally Posted by Late Model Racecraft
Thanks, It is looking good so far!

Here is some Updated flow numbers (still not finished)

Lift Intake/Exhaust
.200 137/116
.300 208/154
.400 270/197
.500 310/228
.600 331/245
.650 335/252
.700 340/257
.800 345/260


Still have quite a bit more development to do, this was first attempt.

Nice numbers!
 
Old Jul 22, 2013 | 07:58 AM
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Late Model Racecraft is infamous around these parts
Originally Posted by GTSR-001
Nice numbers!
Thanks, They are still in development though so those aren't the final numbers yet.
 
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