What a waste . Good pop ups milled to nothing!  No, I hope that you get the engine running ok and you will break that 800 hp barrier soon .

 Seppo from Järvenpää, Finland
www.hollowheads.net (just click the hole in the head to proceed)

Robi, it looks like you need to check your deck clearance. That old piston looks like it's been gettin' intimate with the head!

A little thicker head gasket might help it.

-471 Heads should be there very soon.

Should be a beast!

http://ford-y-block.com 

20 miles east of San Diego, 20 miles north of Mexico

That was a piston from a previous misshap about a year ago  John those heads are gonna be nasty they look great.  I have them bolted down and the engine back together already.  Thanks a bunch!  Might be fired up tomorow.  Here is a look at my new turbo.  I might just sleep with it under my pillow tonight it's perty sexy.  This baby is gonna hit hard.  It will be one angry y-block!!!

One to the left is the old one.  New turbo is a S366 Borg Warner which will support up to 800hp.  It breathes!!!

Hey everyone got it fired up. Thanks for the heads John they really move some air.  I can tell from the extra fuel I had to add to my map.  The turbo is also bigger but my compression is under control now.  We are able to tune the engine much easier now at proper air fuel ratios.  Although I found that I am going to have to upgrade my fuel supply system.  At about 4,000 rpm it was going lean and I could not add enough fuel.  Chris watched the fuel pressure gauge and it falls to around 0 at WOT under boost.  I ordered a bigger fuel pump and I am going to tap a new fuel feed from the tank.  I am still using the original fuel line from the tank that is only 5/16 line.  I think I may be starving my pump.  My current Holley in-line fuel pump is rated for 500 hp with forced induction, subtract about 30-40% off of that for E85 and I  may just be at its limit also.  I ordered a Aeromotive A1000 that should support up to 1,200 hp forced induction.  I am also going to enlarge all my fuel lines for more volume.  I was tuning it a 8lb's of boost (same as with the previous heads and turbo) and the engine ramped up to 375 wheel horsepower and 495 lb/ft of torque at 3,750 rpm before it started to run out of fuel and go lean.  I am looking forward to getting up to 6,000 rpm under boost.  Once I get my new fuel system we will turn up the boost to 15 psi right away.  My engine is a lot happier now with lower compression.  Thanks again to John those heads are bad ass!!

I think you would defineately need a bigger fuel line, no point mucking around you may as well go 1/2" and use the old line as a retun line. Im not familiar with with injection systems but I would think it would still need to be boost referenced?.. Seppo?

What compression did you end up with?

Sorry about going on about O ringing, Someone did point out to me that the chamber shape wont allow it.

Keep going!



"Came too close to dying to stop living now!"

Absolutely boost sensing fuel regulator. We have AN8 sized fuel lines and a Mallory regulator which has a fuel return line back to fuel cell. And we have about 43 psi pressure now.

 Seppo from Järvenpää, Finland
www.hollowheads.net (just click the hole in the head to proceed)

I am running a return line right now but the guy at jegs recommended that the return be the same size as the feed line so that way the fuel pump is running at peak efficiency all the time even while it is returning fuel, makes sense, I will just run 1/2 line all the way around that way I won't have to worry about it.  Right now I am tuning it in at 8 lbs of boost.  As soon as I get my fuel system updated we will start right at 15 psi.  The truck runs great driving it only runs out of fuel when we make dyno pulls.  I did use it to pull our 8x24 enclosed trailer to a car show on sunday where we had our dyno set up all day.  Of course the old ford was parked proudly with its hood open and a lot of DROOL all around it   It pulled the trailer like a champ.  If anyone is thinking about a turbo for any project I would highly suggest a Borg Warner S366.  That baby rocks and whistles like a D9 CAT.  My buddy was following beside me on the highway and he said he could hear the turbo the entire time (even over my obnoxiously loud exhaust).  Don't worry my new pump and fuel line will be here soon and we will turning up the boost soon.  I have really high hopes for some monster power I can really tell the difference now with the lower compression.  I am not sure what it is exactly but I would guess between 8-9.5 but I really have no idea.  All I know is when that turbo spools those 33 in mud tires can't seem to find enough pavement!!!!

Heading to Buggies and Blues car show with the trailer and dyno.

Ford made it home after a long day of dynoing cars. 

My new fuel system showed up today!!  I shouldn't run out of fuel now.

Robi, lookin great!

By my calc's your compression now should be 8.1:1

Pour the fuel to it and see what you get.

http://ford-y-block.com 

20 miles east of San Diego, 20 miles north of Mexico

I bought a 20 gal fuel cell that we will mount underneath the truck and pull the fuel from there. It has a fuel sender built in so i will use that we will run a line from bottom of main fuel tank and let it gravity feed the auxiliary tank. The return fuel will go back to the top tank. Cannot wait till it's ready to go back on the dyno.