bigd98ss

I have been researching the flow charts of many aftermarket heads and i was wondering how the stock heads flow?

Thank you

Bill Bowling

iTrader: (6)

I would like to know this also.. Anyone know.

Bill

Gunnar@Patriot

iTrader: (20)

We flowed a 241 head on our bench the other day with a stock valve, stock valve job, using a clay radius on a 3.905 bore and it flowed 231 / 179 @.600".

Bo White

iTrader: (59)

Could ya post the flow #s at all lifts too, Gunnar?

Gunnar@Patriot

iTrader: (20)

Only because you asked Bo. LOL

.100 61 / 51
.200 120 / 97
.300 174 / 130
.400 212 / 153
.500 220 / 168
.550 225 / 174
.600 231 / 179

Bo White

iTrader: (59)

Thanx man

Camaro99SS

iTrader: (4)

This is from Chevy High Performance's online cylinder head flow database.

Production LS1 Aluminum Head





GM won’t be left out of category 3 with these heads. This head has great 0.400-inch lift numbers as well as a good E/I ratio. They also feature a more flat valve angle (15 degrees) in order to promote a better combustion chamber that’s shaped like a kidney to help direct combustion and reduce possible detonation. Remember that this head will not interchange with pre-‘93 small-block heads.

Jason

Bo White

iTrader: (59)

I have seeen these #s and it doesnt say but I believe this is on a 4.030 fixture.

radkon

iTrader: (2)

Here's what I've found