j par
Well-hung Member
Not bad for Chinese junk...
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My home inspection of Speedmaster heads
- Thread starter 318willrun
- Start date
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aren't they assembled here in the states?Not bad for Chinese junk...
j par
Well-hung Member
Yes as far as I know they are I was just being sarcastic..
This just keeps building my confidence..
Snap gauges aren't my favorite tools, especially in places with compound curves, but I've been able to get repeat numbers that confirm the section missed by the CNC is because the casting was already big enough.
I'm seeing a .010-.020 difference, but that's within the margin of error with the tools I'm using, in the area I'm using them.
Snap gauges confirm my 1.013 finding, +- .005 across all the ports.
Just keep in mind if you are happy with the flow numbers you can always pour a port and make a mold of it. It may pay dividends down the road. Kinda nice seeing every part of the port in 3D.
Second head.
One guide that has a .... Tight spot. It won't cleanly pass .342, it's probably a few .0001 tight. All the rest were exactly as the first head.
Valves, found one exhaust valve with .001 taper, all the rest were tenths like the first head.
Intake:
0.3406
0.3408
0.3407
0.3407
Exhaust:
0.3404
0.3406
0.3408 - Taper down to 0.3398
0.3403
One guide that has a .... Tight spot. It won't cleanly pass .342, it's probably a few .0001 tight. All the rest were exactly as the first head.
Valves, found one exhaust valve with .001 taper, all the rest were tenths like the first head.
Intake:
0.3406
0.3408
0.3407
0.3407
Exhaust:
0.3404
0.3406
0.3408 - Taper down to 0.3398
0.3403
You guys got this handled well. Great job. Now I can just give mine a quick check over and throw them on my shelf.
Oh no. I seem to remember something about flow numbers, maybe even some porting.
there are so many good posts in this thread, it should be a sticky. I know Joey isn't a fan of sticky's, but what's in this thread can be applied to edelbrocks, etc...
Using the large flat rate board game box you can ship 65 lbs for $19.99.
I use flat rate as much as possible, but the heads are too large for that box, it's only 3" tall. It was $39 to ship both of them in one box to VT, plus insurance using FedEX.
That's not a bad price.
I've been checking out the flat rate deal. If you can get it in the box and close it, without altering the size of the box, they will ship it. Flat rate is the shipping cost not the box shape.
The USPS box is bigger than the fedex flat rate box at 23 11/16 x 11 3/4 x 3 1/4. It will hold a m1 dual plane intake.
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Just the xmas present I wanted, flow numbers.
Without getting too far off topic, that's a fancy case. Do you run a glide because of the sfi case or...?
I’ve been running glides since around 1990 or so. I switched to aftermarket cases three years ago after I cracked a stock case behind the reverse low gear clutch pack oiling the track. I hate being “that guy”.
j par
Well-hung Member
Automatics...
famous bob
mopar misfit
I actually laughed at oiling the track once , and didn`t even pull over to the side. Of course I told them all what I thot about the quadzillion times a camaro dumped gas all over the starting line in front of me , and another guy blowing up a rat about every two week ends , along with all the other chevies and fords that that blew up..
I only did it twice , one a trans explosion on the starting line , the aforementioned one when the driveshaft came out on the big end, which got pretty hairy with 45 pounds in the front tires and one 14" slick with 7 pounds in it , the right rear slick was cut by the driveshaft explosion, biggest piece that we could find was about 10" long.
''I aint sure what this has got to do w/ speedmaster heads tho !----LOL
j par
Well-hung Member
And your women were pretty too...
..
j par
Well-hung Member
Latest question seems to be what is the date code on them and are they the same?..
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