6.04 thats really impresive i have friends that have run that in the 1/8 and have gone on to the 1/4 to run 9.63!!!! thats one monster build you have!

Try an AR-32 Autolite plug They are very cold do not have a projected tip and come side gapped

... Bent push rods seem to be common problem with turbocharged Ys .: We have plenty of those too! But so far, we have had no problems with pre ignition. Luckily, last weekend went without problems with engine... 6.04 at 1/8 mile.

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

Hey everyone,

I have been busy haven't had a lot of time to tune on the ford but have done some and have some updates.  I dodged a bullet.  I am experimenting with some 18mm to 14mm adapters and was running a champion (not sure exactly on the part # but it was a 10 heat range plug) spark plug.  I was having some preignition problems and some weird problems when I would run under boost or 0 vacuum for a while it would start to ignite the fuel as the intake valve was opening so I would back out of the throttle to let it go away.  While I was trying to tune this problem out it preignited on me and them I had a dead cylinder.  I removed my spark plugs and found #3 spark plug was wet.  I decided to check the compression and there was none.  Removed the valve cover and this is what I found.

Them I did a cylinder leakage test and exhaust valve wasn't sealing.  I removed the head and exhaust valve must have been held opern during the preignition and hit the piston, fortunately the cylinder and piston are fine.  John hooked me up with some new parts and have it back together now with some BR7EF NGK spark plugs.  I have it tuned to 435 hp at the wheels and 515 lb/ft of torque on 12lbs of boost @5200 rpm, should make power up to 6000 rpm but I ran out of time today on the dyno.  My new fuel system is much more efficient now.  My injector duty cycle is only at 45%.  Plenty of room for more boost.  These new spark plugs seem to be working well.  The champion plugs had about a 1/4 in of plug that stuck in to the cylinder with no threads.  There was no place to transfer heat to so I am assuming that it would turn into a glow plug once it got hot enough and would ignite the fuel.  Any comments would be great.  More boost to come!!!!

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.

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

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

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. 

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 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!"