Another 380 Build in WAZOO Land!!

[Scrrem]

Originally Posted by LGAFF

Who did the port work? or is that top secret...any measurements???

top secret??????? No TS here Lee, Greg Van Deventer did the porting. I haven't measured them yet, but here is what he sent me for flow #'s, some of it I understand, some mine as well be in Chinese....

saw 320.6 cfm on cylinders. 3 intake. @4.5" lift.
and 248 cfm on exh. @.450" lift. all @ 28" h2o.

Data Sheet for Standard Test
Test Description: LT5 cylinder head LH # 3546 Richard M.

Manufacturer: GM/ LOTUS/ Mercruiser
Part Number(s):
Port Type (int/Exh):
Modifications:

Test Pressure (20,25,28,30,35 or 40) 28

Test Operator: Greg Van Deventer

Fixture Bore Dia.: Cylinder Bore Dia.: 4.060"

After porting work Cylinder head w/ clay radius.

Intake Valve Port #3

Flow Scale Valve Lift (inches) 0.1 0.2 0.3 0.4 4.5 4.8

Percent Flow 64 61 88 69.8 72.8 75 Flow Scale Value (card) 148.9 293 293 440.4 440.4 440.4 0 0

Flow (CFM) 95.3 178.7 257.8 307.4 320.6 330.3

Gross Flow (CFM) 91.1 180.2 213.7 237.6 248.7

Rich