ported gm ls7 numbers
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From: Morton IL
ported gm ls7 numbers
http://www.ls1tech.com/forums/showthread.php?t=497381
very happy with the results...hopefully it runs.
very happy with the results...hopefully it runs.
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Joined: Mar 2002
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St. Jude Donor '09
Originally Posted by wango tango
http://www.ls1tech.com/forums/showthread.php?t=497381
very happy with the results...hopefully it runs.
very happy with the results...hopefully it runs.
From Greg's link:
I had Jay @ Jay Riddle Racing (www.jayriddleracing.com) hand finish my GM LS7 heads. Based on what so many people have said, I was hesitant to have anyone touch the superb GM factory casting, with regards to porting and such. After consulting with Jay, and based on his years of experience with high performance heads, he was confident he could really wake these up. Needless to say, I was very surprised and pleased with the results. Cant wait to hit the rollers and the track. This is on a resleeved 5.3 L alum block, 4.100 x 4.00 422". We also went through the whole motor, and hand crafted the pistons to accomodate the 12* heads, and offset guide spacing.
4.100 bore flowed at true 28" vacuum.
intake
lift ported stock ported w ported intake
.100 77 69 n/a
.200 162 166 n/a
.300 259 245 259
.400 314 299 307
.500 352 340 326
.600 376 362 347
.650 386 360 356
.670 388 n/a 363
.700 392 360 367
exhaust (flowed reverse through kooks 1 7/8 header)
lift ported
.100 58
.200 121
.300 167
.400 208
.500 243
.600 252
.650 256
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