Doing some work on the mill!

[BOSSMAN]

I don't typically take video when I work but today I figured some "Bang Shift guys" might be interested.
These are some Ford 3V heads that will be used with a BIG turbo. I did some chambers modifications on these and this is the first step of my process. Nothing crazy being done here, just a simple setup and knocking the cuts down. Enjoy.

http://youtu.be/OKbqgiyPIVY

[cantvalve16]

So, what kind of gains do you see with mods to the heads like that? Since you angle cut the heads, does the compression come out about the same?

[BOSSMAN]

Since this is for a boosted application I'm not really concerned about the compression (I'm sure the flow gains would more than make up the difference anyways). I haven't cc'd the chambers yet to see the difference but there is still a bit of work to do yet. I will say it made a substantial difference on the flow bench but that number will vary depending on port work and valve job profile. If you look at the chamber the valve is shrouded about 2/3 of its diameter and after much less.

[Barry Donovan]

that bit of grinding..looks like an after thought of engineers to get a number.

it would have been easier just to leave that out, obviously increases a smoother path.

it is cool to be abe to do that as an option.

[BOSSMAN]

One common area overlooked is the chamber, sometimes its tricky to find the gains. This one just happened to be obvious to me and its paid off pretty well on my bench so far. This Mod motor only sees .450 lift so its critical to find what you can in the general range.

[Beagle]

cool video. I am entertained by videos like that, Thanks. I'm guessing - but I suspect they will get hand blended in and the remainder of the chamber gets the crap polished out of it? I get mixed responses on if it's worth it or not (the polish). We had a discussion quite a while back about home made flow benches to kinda quantify if the work done by average monkey with grinder (me) had done a good thing or hurt flow with various mods.

Some day I'd like to see a flow-bench and a dyno line up side by side... haha. I don't live for flow numbers but I get the idea of a relationship between flow and power.

I'm not sure I've even looked at a 3v chamber or really the head at all. Interesting. It looks like you've clayed the port roof, or is it epoxy? If that is the final shape, do you leave the epoxy in there? Do they ever "unbond" ? That may be the port wall on this one but I'm pretty sure I've seen some of your stuff with epoxy? If I'm asking too much, sorry. I get that some things don't get said ...

[BOSSMAN]

I'll certainly share some more pics when I get done with these. There isn't clay or epoxy in them I just didn't get done with roughing in the ports when I decided to stick them on the mill. I use Splashzone epoxy which if you do the proper prep work it won't go anywhere. Our EMC Hemi manifold is full of Splashzone!

[BOSSMAN]

Finally almost done with these just thought I would post some follow up pics.

[Beagle]

Never picked up on that - eerrrrr... 5 chambers! COOL!

[Jimbo17]

Thanks for posting that information.

Getting more flow and horsepower out of heads is an art!

The machine work and knowing what to cut is tricky without making the heads worst then when you started.

A friend of mine showed me four brand new manifolds in a box and said see if you can see any difference in the runners which I did.

Long story short they all looked exactly the same as far as runner finish but one on the dyno produced 40 HP more then the others.

Cost back then was around $1,800 dollars but it passed tech every time.

Jimbo

[BOSSMAN]

A few more pics.