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Discussion Starter #1
have a low hour 1999 460 ford industrial. Cylinder pressure all came in between 180-185 psi

Hoping that it has the SCJ cam, and straight up efi double roller timing set When i get back moving on this i will verify

Downside...it has e6te heads with small 1.508" exhaust valves??. Intake valves are normal 2.088"
Thermactor bumps with no holes in them. I am following scott's instruction porting the heads.
Probably going to keep the D0OE intake, would there be a benefit to switching to a performer if i found a used one cheap?
Definitely going to put on 1-3/4" longtubes and 2.5" duals
Will curve the dizzy, i hear the propane motors have an aggressive curve and i may have to dial it back. WE will see

After much deliberation I am going to just port the heads and leave everything else stock in the spirit of a true budget build for an old beater ford truck i have.
This will be replacing a tired 400 so the improvement will be huge even stock.

Any guesses on hp and torque for the above with decent port job and 750 carb? without the SCJ cam?

Any tips to tweak some more power out for cheap? I priced just having the block 0 decked, but i dont think it makes sense given everything else
 

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Discussion Starter #3
Propane injection or the common vapor system? They have very different power densities.

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This one had an impco 225 on it, i assume it was natural gas or propane?

Im going with regular gas carb, I built a 12.2:1 edel rpm headed 472 that ran on propane back in 2007. Im going a little cheaper this time ...hah
 

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Is the 225 going to provide you with enough fuel to mix? It is listed as 329 cfm in their chart (attached a screen capture).

Not sure what a stock 460 industrial manifold flow rate would be; I am guessing 400-500 cfm?

I did find one industrial spec sheet (picture attached), says stock 161-189 @ 2800.

460 x 2800 rpm = 1,288,000 / 1728 = 745.37 / 2 = 372.69 cfm
372.69 cfm x .85= 438.45 cfm

Or 543.05 cfm at 4800 rpm.

That is the airflow requirement from the same page as the chart.


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Discussion Starter #5
Sorry for misunderstanding
I meant im going with a regular gasoline carb
No propane
A 225 is barely enough for a 22re
I cant believe they put them on these 460s

Awesome data there
Makes for a nice read
 

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Discussion Starter #7 (Edited)
more good info here

http://www.pittauto.com/customer/piauel/pdf/ford/194-208 LSG875.pdf

page 183 tells me my small exhaust valves are correct , arghhh

What do you think the chances that the seats are just "bushed down" Can seats be taken out any other way that with a mill at machine shop?
It would be nice if I could simply change the seats from 1.5 to 1.65" and upsize the exhaust valves. The seats in my heads do appear to overhang into the bowl.. specs say counter-bore diameter is 1.626-1.627" and seat diameter is 1.629-1.6295 on the industrial heads.
 
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