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

[Paul Workman]

Could be my eyes, but it doesn't appear that all runners are equal diameter. No?

For comparison, one* of the FBI 500+ IHs:



Same motor's heads:

Thanks for sharing!!

*Note: Porting/experimentation - at least in my house - is an iterative process - especially when there are no sponsors to pick up the tab if something goes wrong. So, techniques vary motor to motor over time and experience learned through serendipity, e.g., Marc's 500 package is now a 510 package - one example

[XfireZ51]

I'd be interested in knowing whether those runners are "funneled" or stovepiped at 36+mm.I have a set of GVD headsalso. They start at the top @36+mm or so but taper to 34 or 33+.

[Scrrem]

Well, it's coming together, heads on next. The new girl isn't going to see Carlisle this year
Rich

[5ABI VT]

awesome keep the pics coming !!!=D>

[rkreigh]

Originally Posted by Scrrem

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

very good numbers

and you had me at "got some"

I can't wait to see this beast clear it's throat

you know we need a friendly "stroker dig" with Yun, Phil, you me, and anyone else we can attract!

maybe later in the fall once she's broken in, say, Oct for a "blow the leafs off" cruise to MIR

[Scrrem]

Sounds like a plan Ron. I may not get it buttoned up and ready to go in before mid-Oct...we'll see. Got to see what the Dr's schedule looks like.
Rich

[Scrrem]

Made good progress last weekend. Got oil pump, primary /secondary chains and guides installed. Also got lifters and cams in and started the cam timing.
Rich

[secondchance]

Originally Posted by Scrrem

Made good progress last weekend. Got oil pump, primary /secondary chains and guides installed. Also got lifters and cams in and started the cam timing.
Rich

Another cute puppy in the works!

[USAZR1]

Originally Posted by secondchance

Another cute puppy in the works!

Or another serious bullet. lol!