96-97 lq1 head flow data here

[dohcfiend]

it was flowed in 28 inches of water and i think a superflow 600 flowbench.

note: bottom of retainer hit top of seal @.400 on intake and .450 on exhaust

lift intake exhaust ratio


.050 48 32 66.6
.100 104 88 84.6
.150 149 127 85.2
.200 176 153 86.9
.250 200 166.5 83.2
.300 225 176.5 78.4
.350 244 185 75.8
.400 261 193 73.9
.450 - 198 -

enjoy.

[OldSkoolGP]

Nice. I'm assuming this is a stock head since it doesn't say. Mine ported were I think 288 and 20x at .400 lift, according to Ben's flowbench. I wonder what those will flow with a little work. Will you be finding out for us?

[dohcfiend]

yes they are stock. also in the near future i want to test the effects of different exhaust valves in them as well.

i have heard conflicting statements that the older valves in the newer heads will help at all so i intend to find out sometime. most say nay some say yay. we shall see.

[SappySE107]

Older valves in newer head give you more compression.

Guess I just have to flow a stock 97 head and compare sometime Do you know what size cylinder was used?

[dohcfiend]

i am guessing it the spot marked "test fixture bore dia" on the sheet. it says 3.750.

sorry for the omission.

[SappySE107]

No problem, thats exactly what I wanted. I use 3.70