hand ported 243's, how do these look?
05-20-2008, 07:59 AM
#21
Im not sure what specifically youre referring to... The swirl ramp? If so, every major porter has been taking them down without any problems with insufficient fuel mixing at low rpm. You usually see some of the ramp left in because the water jacket is pretty close and you don't want to break through.
05-20-2008, 11:46 AM
#23
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they should the heads look good...
05-20-2008, 06:06 PM
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I'm pretty sure that the heads in the first pictures are 317 or 035 heads. These heads have essentially the same exhaust and intake ports and a 72 cc combustion chamber that is very similar to a 241 head. The 317/035 head was used on the LQ4/LQ9 engine from 2001 and after.
Steve
Steve
05-20-2008, 09:27 PM
#28
Im not sure what specifically youre referring to... The swirl ramp? If so, every major porter has been taking them down without any problems with insufficient fuel mixing at low rpm. You usually see some of the ramp left in because the water jacket is pretty close and you don't want to break through.
05-20-2008, 09:55 PM
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im sure they will work great, but if he had some flow #'s he would get more buisness if they are over 300cfm @600 lift thats good. So people can see if its worth sending him your heads ya know 
05-27-2008, 03:10 PM
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The heads certainly worked, gained 32rwhp.
https://ls1tech.com/forums/dynamometer-results-comparisons/927656-gained-32rwhp-after-ported-head-swap.html
https://ls1tech.com/forums/dynamometer-results-comparisons/927656-gained-32rwhp-after-ported-head-swap.html
06-04-2008, 10:07 PM
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06-12-2008, 02:15 PM
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Here's the flow numbers and info I got today.
Intake .100=74
.200=160
.300=195
.400=273
.500=296
.600=315
Exhaust .200=110
.300=158
.400=198
.500=220
.600=232
Exhaust was measured without a pipe. Take these for what they are worth, as my flowbench is nothing fancy, nor do I think it really backs up to other benches very well. Not only that, it is dry flow, not wet flow.Sorry for the delay.-Scott
Intake .100=74
.200=160
.300=195
.400=273
.500=296
.600=315
Exhaust .200=110
.300=158
.400=198
.500=220
.600=232
Exhaust was measured without a pipe. Take these for what they are worth, as my flowbench is nothing fancy, nor do I think it really backs up to other benches very well. Not only that, it is dry flow, not wet flow.Sorry for the delay.-Scott
