NoGamesLS1

iTrader: (16)

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

Gunnar@Patriot

iTrader: (20)

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.

Gunnar@Patriot

iTrader: (20)

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

Bo White

iTrader: (59)

Thanx Gunnar

Gunnar@Patriot

iTrader: (20)

No problem Bo.

radkon

iTrader: (2)

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

NoGamesLS1

iTrader: (16)

thanks

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.

Gunnar@Patriot

iTrader: (20)

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

Full-Force

iTrader: (11)

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

Gunnar@Patriot

iTrader: (20)

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.

BlackHawk T/A

iTrader: (3)

He would likely be wanting the Stage III since he has a 436.

DONAIMIAN

iTrader: (18)

LS1 heads are not bad at all. Ive seen some impressive numbers out of thoes heads when ported by the right person.

Gunnar@Patriot

iTrader: (20)

Didn't see the 436 part. We can do a set of our stage III custom done for your bore size.