Great pics Rob, thanks for sharing them.

 

Any before/after flow number?

How does one adjust the lash on the rocker arms?

 

The M112 uses hydraulic lifters.

 

How about fixing my parts I have been waiting for 4 months for instead of doing something else!!!!!!!!!

 

riot, pm sent

 

these were dropped off to the head shop that does all our porting for us. they have been on/off the flow bench about a dozen times and are awaiting one more step before they are ready to be installed. we are very happy with the flow number so far but think we can get a little more out of them yet. secrets to be devulged after the next step is completed.

 

How after before (i.e. stock) numbers??

 

There was a whole episode of Super Cars Exposed on last night about AMG and the cars they build. Showed the engine shop and a complete engine build. Pretty impressive stuff!

 

Rob, any reason they didn't knock down the Guides? What kinda valve job? 5 angle or possibly a serdi? Did they step it up a few mm on the valves?

 

so far...
full port and polish (equavilant to a stage 3 port/polish)
fully reconditioned
fully polished chambers
backcut valves
deck milled with a CBN cutter for proper RA surface finish
4 angle valve job on a serdi machine with less then 0.001 runout
valve tips have been corrected
new valve stem seals

 

That's the Money right there. I'll bet that alone counts for over 1/2 the gains the Headwork sees.

 

What's that mean in English?

 

Means that's one bad-a** set of heads right there!

It's the most accurate method of guaranteeing that your heads are as perfect as possible. There's no better way to machine out valve seats and guides.

I'm more and more convinced 10's or better are this summer!

 

it's basically a full radious valve job.

 

But what cams are you going to install? Heads and cams group buy?

Les

 

Hey Rob,

Based on the new numbers off these heads how much horsepower do you feel we have left in these engines, be it supercharged or turboed?

 

I know it's NASCAR, but they are using basically an infinite number of "angles". Their cutter doesn't have discrete flat sections where there is a fixed angle. Instead, they blend continuously in an arc (except for the seat, of course, it has to be flat for a bit). So what you get is what looks like a continually curving bell-mouth (with the flat seat). Same for the valve face. Supposedly it's worth a few hp; air doesn't have to flow over as many sharp edges.

 

I would'n't get too convinced yet, this mod "MAY" pick up 15hp or so, it has been done before by me and a few c32's. These heads are already near perfect stock, not a lot left in them. And 10's or better without an extra power adder, 100% no chance regardless of engine work. Too much computer involvement in the rest of the powertrain.

 

Pretty sure a bigger blower, small adjustment in the stroke, slicks, a good driver and a diet would do the trick...


lol just saying 100% no chance is defenetly 100% wrong

 

once i went to a mechanic that worked at a tune shop and asked how much more HP can he get out of my engine and he told me (just as i have herd from so many others) ... how much $$$$ do i have.