I've got some popcorn and Pepsi here!

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

just out of curiousity, why plumb it into the intake rather in line with the hose to the BOV ? I do have to admit thats pretty slick though lol !!

-Mike

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I am the Guardian, I hate helos, everything leaks.......

or at the front of the compressor for a more accurate reding of boost ?

-Mike

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I am the Guardian, I hate helos, everything leaks.......

There are pressure differences above and below the throttle blades. The engine sees what the intake sees. (if that makes sense) The fuel pressure regulator is plumbed above the throttle blades in the carb hat because of this pressure differential. This is so the fuel pump can overcome the pressure and keep the fuel bowls full rather than the fuel being pushed back into the line.

wouldn't a boost referenced FPR do the same thing ?

-Mike

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I am the Guardian, I hate helos, everything leaks.......

Mike, I don't understand your question. A boost referenced FPR is utilized in this application. It receives its signal from the carb hat.

my bad had a brain fart about what you said. Hows the build coming ?

-Mike

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I am the Guardian, I hate helos, everything leaks.......

Picked up my block last week, dropped my intake off at the powder coaters, dropped off my header and down pipe to have it nickle & chrome plated. I'm still finishing up the tailpipe.

Still deciding if I want to run the old engine with the new turbo and header.

Whats Up? Anything new? Did you decide on the old motor or wait for the new? Later

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10.74 @ 127.47 mph 1320 ft
6.65 @ 107.80 mph 660 ft

http://www.youtube.com/c/turbo66valiant
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I got the header back from the platers on Monday. I started to shim the valve springs and install 340 springs on the old motor to see if i can get one more pass with it. It will have the new exhaust and new turbo to see how it performs with those change.
Last year, my problem was the stock springs being to weak.

New motor still needs the crank cut (and balancing) but everything else is ready to go.

Shaker why do you have to shim the valve springs ? Have you taken pics of the plated header ?

-Mike

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I am the Guardian, I hate helos, everything leaks.......

No pic yet...there is a pressure ratio that is about 3 to 1 on inefficient turbo engines...meaning if you are putting in 20psi on the intake you will see about 60 psi of back pressure on the exhaust side. I was getting a backfire with the stock /6 springs because they could not close...they have maybe 50-60psi on the seat. I'm shimming the 340 springs to have around 120psi on the seat.

I cant wait to see how this all turns out!!

Be sure to post some vids!


Greg

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http://www.youtube.com/hyperpack

shaker couldn't you get stiffer springs ? are any even available ? By shimming them, will you diminish how much the valve will open and or will it bind at all by being shimmed ?

-Mike

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I am the Guardian, I hate helos, everything leaks.......

340 springs will handle it (and they are cheap)...The stock cam does not have much lift either so coil bind is not an issue.