Grease and some plexglass too block the runners and fill it with some water from the beaker, well a few beakers anyway. I bet the difference in volume between the two is significant.

Andy, what LSA is the cam?
I have my old 264/264 HXL cam on 112 LSA sitting on the shelf if you want to try it?

Thanks Andy!! Mission complete.

Cab was kind enough to loan me a tunnel ram. Not sure when I'll get back on the dyno but when I do I'll give this setup a whirl. These are a pair of 1000 cfm carbs so probably overkill for this little pump gas motor but we'll try it anyway.

I did measure the volume of the intakes. (measured the weight of the water and converted to volume) The stock M1 was 192 cubic inches while the ported version is 213 cubic inches. So an 11% increase in volume due to the porting.

Glad that worked out for you Andy. I'm looking forward to the results. That being said you really to top it off with a pair of CarterBrocks.

thanks Andy ,
I remember filling and measuring my Modman - it was right around 5 litres so just over 300ci . Even after fabbing a filler it was 4 litres . No wonder it was soft down low on the strip with only a 440ci . I will try it on my 505 at some point .

Tex

Thanks, for the follow up.

Anyone running 7/16 pushrods yet with the Trick Flow heads? I mocked it up the other night and it looks like they will clear if the rocker arm is positioned just so.

Hi Guys- as some of you know I'm just about done with this 470 low deck with Trickflows (very similar to AndyF's engine) except with a Comp solid cam from Dwayne P. on a 1.6 rocker. This will be a bracket engine going in my '65 Plymouth.

My question to those who already have these heads running- what rocker arms/ratio are you running? Talking with Andy, there are not alot of available choices. I've mocked up my 1.6 "Harland" copies from Mancini Racing (which are supposed to be identical), but IMO are a tad too long of a sweep pattern starting right on center and running 1/8" on the stem where it starts to round again. Now, according to trickflow, these are the recommended ones- but maybe only in a 1.5 ratio??

I'm thinking the Hughes 1.6 might work (or maybe it's the same length??) If by chance there are a set of old Crane golds in 1.6 floating around- those might work as well (same length too??) Anyone try the PRW stainless 1.6's ??

Once we get this figured out- it's off to the Dyno shop. This set-up should be good for 650 HP/ 625 Ft.Lb.

Ok, here's the deal on the Trick Flows, as far as rockers are concerned.

The Harland Sharp rockers recommended by TF, are way too long, as they are on most heads, and are even worse on the TFs, because they raised the rocker stands .100" from stock. That is a step in the right direction for better rocker geometry, but they didn't offset the stand when they raised it, which reduced the shaft-to-valve centerline by .025". That is why the shorter rockers seem to fit better, but if the shaft is relocated to properly set rocker geometry, any rocker will work.

Since you mentioned the PRW stainless rockers, I am doing a build right now with them, and just like any other roller rocker, I will have to move the shafts to the right location for that combination. You will need to do the same, regardless of the rocker chosen, if you want it to be right.

BTW, assuming a net valve lift of roughly .650", you should have less than .040" sweep across the valve when it is right. If I'm understanding you correctly, you're looking at .125"? No Bueno, Amigo!

The specific HS part number recommended by TF for these heads("E" at the end of part number)are shorter than the std HS rockers and should fit just fine.
The std HS rockers, along with the Mancini version, are too long.

IMO, this was a mistake made by TF when these things were on the drawing table.
They should have had the shafts located so that the std HS rockers fit properly.

They might fit just fine, but a shorter fulcrum sweeps more, so it will actually sweep slightly more. Still no good.

Hughes 1.60 rocker arms

Harland rocker arms (long ones, not the E)

Crane 1.60 rocker arm. Short style, discontinued.

Andy, retry that with the 700lbs open pressure to show the "loaded" ratio.

Is that on a .450 lobe?

....i used mikes relocation kit with my HS 1.5s that i already had
seemed to be the best and most economical solution?

0.445 to be exact and zero lash. I'll recheck once I get the new springs installed. I was using a checking spring so I could verify VP with the new ratios. I'm good to go to 1.70 rocker arms with this cam. I just need to find someone who sells a high quality 1.70 rocker arm that fits the Trick Flow head.

I would say a head might have to make it's way to T&D for that.

The pic of the scrub pattern with the RAS rockers on page 10 of this thread looks pretty good to me.