Well I figured out my issue with my engine.  I had valves sticking in the guides.  No big deal just pulled the heads off and had the guides reemed a little and now it is running top notch.  We just headed to my hometown with the dyno this weekend and pulled it there with the old ford.  Pulled the trailer and dyno like a champ.  The turbo charged y-block was a big hit.  It drew a lot of attention.  everyone was suprised at the power it is putting down.  We had a twin turbo chevelle on the dyno that put down 831 wheel horse power.  Naturally that just provoked me now.  He is a friend of mine from back home and I will not be out done.  I might not beat that but I will try my best.  There is some video of the dyno in action on youtube if you search Robi's Repair.  I had really never seen a rail car before and I got to drive two of them on the dyno.  What a rush!!!

There is probably a lesson here for the guys running turbos and anyone doing the machine work including myself. The guides in Robi's heads were not set-up on the tight side, at all. It appears that the additional heat made by the turbo is causing the valve stems to grow more that expected. This results in sticking valves and bent pushrods.

It appears that guide clearance needs to be in the .0025" range to be safe.

http://ford-y-block.com 

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

Intake and exhaust?


Lawrenceville, GA

John's comment may well be the issue. We have new k-liners in our heads and Ferrea stainless steel valves on both sides, And as said, we lost couple of push rods at the starting about an half hour after previous run. But, last weekend went without problems on the engine side . Chevy parts keep breaking...

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

Have you count the pushrods for sure?


Hyvinkää, FI

What diameter are these push rods? - mechanical column strength is based on the tube OD, so aren't the Isky pushrods out at 3/8 diameter.....?

 
 Steve Metzger       Tucson, Arizona

That's a good point.  I will have to ask what they machined for clearance in the valve guides.  I just pulled the trailer 300 miles and about half of that was under boost and everything worked great.  That engine pulls hard and definately flows better with John's heads on there.  I am thinking I can squeeze at least 18-20 psi out of my fuel management system soon.  If a chevy small block can handle 21 psi my Y can too!!

I will have some nice video to come soon. We built an engine in a 01 subaru wrx and he wants to race the old ford. Naturally I thought this was a great idea. Will have some video of as soon as it takes place. I know it's not a y-block but i would love to show you guys my dad's 68 Torino GT. Go to youtube and search robi's repair there is a nice video of it on the dyno with a NOS run hope you like it. http://m.youtube.com/#/watch?v=3lOSrmla2Zs

Y-Guys......speaking of the WRX, Reed and I went to our local track 2 weeks ago to "tune" my junk

         to get ready for Columbus(Can't go now...Issac got in the way). Reed had added a 2-step

         to help with launches and pulled up to the line to try it out....Well, a New WRX pulled in the lane

         next to him...Reed bogged a little(2500rpm launch)... the WRX beat us to the line...He went 8.64

         my Junk went an 8.48 @ 87mph....A big improvement for us @ 10lbs boost.

                  Can't wait for the results from Columbus...hope "Issac" doesn't get 'em.

                                                            Bill

Bill

Pelham,Al

Bill.  You and Reed were missed at Columbus.  The races for Sunday were cancelled Saturday which was a good call.  All the Saturday races took place with some delays for sprinkles.  Most of the Y-Blockers ran both the Y class and also another class.  Many of the bracket classes were also represented by Y’s.  Greg Dietrich and Harry Hutton in the final for the Y-Block class with Greg taking a close win.  My altered is stuck in the 8.90's at 144mph but no breakage issues so all is well on that front.  I had a trailer hub go bad on the way home so I'm addressing that now so I can get back to the track with some suspension changes.

Lorena, Texas (South of Waco)