What do as cast ls6 heads flow?

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Jan 10, 2006 | 05:42 PM

NoGamesLS1

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What do as cast ls6 heads flow?

What will the ls6 head flow, as cast? Would use the search but its been draggin ***

Jan 10, 2006 | 05:55 PM

Gunnar@Patriot

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Quote:

Originally Posted by NoGamesLS1

What will the ls6 head flow, as cast? Would use the search but its been draggin ***

Not at the shop right now, but if memory serves the ones we have flowed were in the 250's @ .600". In the morning, we will get some numbers all the way from .100"-.600" posted up.

Jan 11, 2006 | 08:47 AM

Gunnar@Patriot

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Here are the numbers on a stock 243 head with stock valves and valve job. These were flowed on a 3.905" bore using a clay radius.

.100 63 / 59
.200 124 / 105
.300 179 / 140
.400 220 / 159
.500 242 / 170
.550 250 / 175
.600 252 / 178

Jan 11, 2006 | 11:55 AM

Bo White

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From: Vance, Alabama

Thanx Gunnar

Jan 11, 2006 | 12:34 PM

Gunnar@Patriot

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No problem Bo.

Jan 11, 2006 | 01:23 PM

radkon

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From: Cleveland, Oh

Posted in LS1 head thread:
https://ls1tech.com/forums/showpost....11&postcount=9

Jan 11, 2006 | 04:15 PM

NoGamesLS1

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thanks

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Jan 12, 2006 | 06:25 PM

Gunnar@Patriot

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Quote:

Originally Posted by Quickin

250cfm....you gotta be kidding me. Man I gotta get new heads, mine are still just LS1 friggin heads on a damn 436 stroker. Talk about the weak link.

We have 243 CNC ported castings available with OEM valves and LS6 springs for only $865.00 per pair assembled. Check out this thread for all the options we currently have available.

https://ls1tech.com/forums/generation-iii-internal-engine/435820-cnc-ported-243-budget-heads-865-00-per-pair-assembled.html

Jan 12, 2006 | 11:22 PM

#10

Full-Force

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From: Upstate of SC

Quote:

Originally Posted by Gunnar@Patriot

do you have any info on what those heads you just mentioned flow at .600?

i know with the bigger valves you are getting 305ish but how about with stock valves?

also, im assuming there has been no multi angle job done on the stock valves is that right?

thanks

Jan 13, 2006 | 09:12 AM

#11

Gunnar@Patriot

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Here are some flow numbers on a set of our ported 243 castings with 2.00"/1.55" valves. Heads were flowed on our Superflow 1020, 3.905" Bore, using a clay radius, and pipe:

.100" 75 / 62
.200" 154 / 121
.300" 215 / 165
.400" 254 / 200
.500" 285 / 217
.550" 292 / 221
.600" 301 / 226

We do our 5 angle valve job on these.