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#1 |
Member
Join Date: Jun 2010
Location: Ocala, Florida
Posts: 33
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I am looking for some feedback on these heads. The biggest question is how much machine work is needed to install. How is the workmanship? THX. Jay
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#2 |
Senior Member
Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,132
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Web site is here: http://www.millerhi-speedheads.com/index.html
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A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
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#3 |
Senior Member
Join Date: Jun 2010
Location: 34.22 N 118.36 W
Posts: 1,068
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Jay,
It really depends on what you are trying to do, I have one on my coupe, sn 002. I have installed a few over the years and not had any problems. Most folks will try to hot rod something like this, improving exhaust, intake and camshaft. Tell us more about your planned installation, you will get tons of suggestions. John
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As Carroll Smith wrote; All Failures are Human in Origin. |
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#4 |
Member
Join Date: Jun 2010
Location: Ocala, Florida
Posts: 33
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Thanks for the reply. I have a 29 Roadster and am looking to do something different. My motor is a fresh build. It is balanced and blueprinted. It is .30 over with Ross pistons and a touring cam. It has bearings and a scat drilled crank along with bigger Chevy valves. It runs a stock looking milled head. Compression around 6 to 1. Intake for now is a Holly 94 and a sprintcar style header piped to a custom exhaust system. I have plans for two 48's. Rear gears are 3:54's. At 68 years young as I mentioned earlier, just looking for something different. THX.
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#5 |
Senior Member
Join Date: Jun 2010
Location: 34.22 N 118.36 W
Posts: 1,068
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Jay,
It sounds like you have a pretty stout setup. If me, I would just add a better head and call it a day. The stock chamber lacks quite a bit in the performance dept, not just the CR but the amount of turbulence from squish design. Do some research on the Brierley head, it has a chamber similar to the old HD flattrack design. It put up some pretty good HP numbers too. John BTW, I prefer the OHV designs, Miller, Moller, Gemsa and McDowell. Working on a SOHC Gemsa for my coupe.
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As Carroll Smith wrote; All Failures are Human in Origin. |
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#6 |
Senior Member
Join Date: Aug 2010
Location: SF Bay Area
Posts: 216
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Give Steve a call and talk to him. |
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#7 |
Senior Member
Join Date: Jun 2010
Location: 34.22 N 118.36 W
Posts: 1,068
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X2 Dan,
J
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As Carroll Smith wrote; All Failures are Human in Origin. |
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#8 |
Senior Member
Join Date: Jun 2010
Location: Temecula, CA
Posts: 4,115
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When you buy a Miller from Steve, you get a complete package, rocker arms, push rods, etc. No machining is needed. You would probably want to change cams, depending its lift, because an OHV head gets lift from the rocker arms, 1.5:1 in this case, which is likely more than you would want with the new head, plus flathead cams have a different lift-rate, making the action quite fast and can be hard on the rest of the valve train. As John stated, you might want more compression but that not really necessary. No special machining of the block is needed.
My flathead would be much better than what you have, but although I am in production right now, I have a waiting list for them. |
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#9 |
Member
Join Date: Mar 2013
Posts: 79
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This is something different and it pretty much a bolt on improvement. I did modify a weber intake to accept the Stromberg 97 bolt pattern. I used the weber intake because its the lowest one made; I think. This allows everything to fit under the hood. Performance is peppy and with the T5 it is really fun.
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#10 | |
Senior Member
Join Date: Sep 2022
Location: SoCal
Posts: 636
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#11 |
Senior Member
Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,132
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I have a related question. I have the torsional vibration dampener on the front of my crankshaft. It has a bigger diameter pulley. How would that effect the supercharger? Would it make the pressure too much? Could I (should I) run a larger diameter pulley on the supercharger to compensate?
__________________
A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
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#12 | |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,942
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Last edited by Y-Blockhead; 10-09-2023 at 07:46 PM. |
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#13 |
Senior Member
Join Date: May 2017
Location: Denver Area
Posts: 433
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A couple pictures of my set up.
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#14 |
Senior Member
Join Date: May 2010
Location: VA
Posts: 1,450
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#15 |
Senior Member
Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,132
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Another question: What compression ratio are you guys running with the superchargers?
__________________
A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
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#16 |
Member
Join Date: Mar 2013
Posts: 79
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I am going to post under super charger thread, try to keep all super charger related info. together.
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