Snyder's High Compression Heads

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gary678*

Senior Member
Hi, I have a 1932 C Head in my A. Advantages/Disadvantages of converting to a 5.5 or 6.1 ? I have a T5 transmission with a 3.78 rear end. Thank you for any input ! Gary
 
The Model B compression ratio was 4.6 : 1. The Snyders Heads will give a noticeable increase in torque but you will have to switch to the Model A water pump and less spark advance should be used to avoid detonation.
 
gary678* said:
Hi, I have a 1932 C Head in my A. Advantages/Disadvantages of converting to a 5.5 or 6.1 ? I have a T5 transmission with a 3.78 rear end. Thank you for any input ! Gary
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Hey gary678,
What shape is your engine in ? The two Snyder cr that you mention , IMO, will give you something to smile about , performance wise. That is unless you have a worn out / rattle engine, then might make it more rattle.

At this time, I'm running a Snyder 6:1 and my B engine likes it !
However, my B is built to handle most any head and I just took off one of Tod's cast iron crow foot flatheads...at 8:1.

Can't help myself. Have to continually experiment, kind of what you are doing :) !
 
FrankWest said:
How does this increased compression and torque affect the Babbitt bearings
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As said, depends :).
How good condition is the engine ? Iffy engine/wornout, I wouldn't do it. If good engine internals, 6:1 isn't going to do anything but spice it up a little.
 
Just don't make the engine work too hard at low revs.If you hear detonation, your're doing it damage. Other than that, I say "Go for it".
 
By the way the "C" is just a parts number designation, not a Model. Also it does not mean the crank is counter balanced, it might be but then again there is a better chance that it's not.
 
Frank: I've been told that 7 or a little above is about the top end compression wise for a stock A in good shape. The key is not to advance the timing to far.
 
Howdy boys, I haven't posted on here since it was new, back in 2010ish. So, here goes. I have a 5.5 on my pickup, that I shaved .075 off of. Really made a difference. I have a counter balanced crank, lightened flywheel, and FS Zipper ignition installed in the engine, along with a BW OD, and 3.78's. (The engine outran the 4.11's I had in it, so I installed the 3.78's) 65 MPH is easily obtained, but I don't go there, other than to show off. Great combo in my opinion.
 
One more thing, just be careful not to shave off too much of the head surface! Do some measuring on your block and piston rise, so you don't end up with an expensive mistake! Questions? Thanks!
 
I have an old cast iron 5.5 head on my car. I haven't done anything to reduce the spark advance and I haven't noticed and pinging. Is this something I should be worried about?
 
Seabees said:
Howdy boys, I haven't posted on here since it was new, back in 2010ish. So, here goes. I have a 5.5 on my pickup, that I shaved .075 off of. Really made a difference. I have a counter balanced crank, lightened flywheel, and FS Zipper ignition installed in the engine, along with a BW OD, and 3.78's. (The engine outran the 4.11's I had in it, so I installed the 3.78's) 65 MPH is easily obtained, but I don't go there, other than to show off. Great combo in my opinion.
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I have a 5.5 unshaved on my Phaeton . Standard bore, Flywheel standard, Rear end standard, No overdrive and standard ignition and crank . Also runs 65mph with ease -Makes you think doesn't it -They did advertise 55 to 65 mph when new. I guess I just have a good one although I expect your one might get to 65mph quicker than mine- Karl
 
I'm running the 6.0 head and a lightweight flywheel on my 30 pickup. You don't need much timing and she scoots right along. I'll be picking up another 6.0 at Hershey!
 
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