The Ford Barn

gary678* · 07-13-2017, 03:26 PM

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

lindy williams · 07-13-2017, 04:24 PM

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.

hardtimes · 07-13-2017, 04:27 PM

Quote:

Originally Posted by gary678*

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

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 · 07-13-2017, 04:43 PM

How does this increased compression and torque affect the Babbitt bearings

hardtimes · 07-13-2017, 05:46 PM

Quote:

Originally Posted by FrankWest

How does this increased compression and torque affect the Babbitt bearings

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.

gary678* · 07-13-2017, 08:12 PM

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Hi, Thanks for the reply; engine is good (rebuilt). Gary

Synchro909 · 07-13-2017, 08:28 PM

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".

redmodelt · 07-13-2017, 08:34 PM

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.

Chuck Sea/Tac · 07-13-2017, 08:41 PM

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.

duke36 · 07-13-2017, 09:57 PM

Is the FS Zipper ignition and 5.5 head a good combo, re: automatic advance vs. manual spark control?

Seabees · 07-13-2017, 10:34 PM

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.

Seabees · 07-13-2017, 10:36 PM

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!

Chris Haynes · 07-13-2017, 11:18 PM

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?

Karl · 07-13-2017, 11:29 PM

Quote:

Originally Posted by Seabees

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.

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

Wick · 07-14-2017, 05:27 AM

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!

CarlG · 07-14-2017, 12:18 PM

Quote:

Originally Posted by duke36

Is the FS Zipper ignition and 5.5 head a good combo, re: automatic advance vs. manual spark control?

That's what I have and it's working great.

gary678* · 07-14-2017, 12:59 PM

Thank you all !! Very helpful !! Gary

07-13-2017, 03:26 PM	#1
gary678* Senior Member Join Date: Dec 2016 Location: Middletown, NY Posts: 165	Snyder's High Compression Heads 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

07-13-2017, 04:24 PM	#2
lindy williams Senior Member Join Date: May 2010 Posts: 335	Re: Snyder's High Compression Heads 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.

07-13-2017, 04:43 PM	#4
FrankWest Senior Member Join Date: Sep 2013 Posts: 3,005	Re: Snyder's High Compression Heads How does this increased compression and torque affect the Babbitt bearings

07-13-2017, 08:12 PM	#6
gary678* Senior Member Join Date: Dec 2016 Location: Middletown, NY Posts: 165	Re: Snyder's High Compression Heads Sponsored Links (Register now to hide all advertisements) Hi, Thanks for the reply; engine is good (rebuilt). Gary

07-13-2017, 08:28 PM	#7
Synchro909 Senior Member Join Date: Jun 2014 Location: Melbourne, Australia Posts: 7,496	Re: Snyder's High Compression Heads 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". __________________ I'm part of the only ever generation with an analogue childhood and a digital adulthood.

07-13-2017, 08:34 PM	#8
redmodelt Senior Member Join Date: May 2010 Location: Portland OR Posts: 6,341	Re: Snyder's High Compression Heads 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. __________________ I know the voices aren't real but damn they have some good ideas!

07-13-2017, 08:41 PM	#9
Chuck Sea/Tac Senior Member Join Date: May 2010 Location: Between Seattle & Tacoma Posts: 2,354	Re: Snyder's High Compression Heads 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.

07-13-2017, 09:57 PM	#10
duke36 Senior Member Join Date: Jun 2015 Posts: 1,414	Re: Snyder's High Compression Heads Is the FS Zipper ignition and 5.5 head a good combo, re: automatic advance vs. manual spark control?

07-13-2017, 10:34 PM	#11
Seabees Senior Member Join Date: Jul 2017 Location: Eastern Oregon Posts: 205	Re: Snyder's High Compression Heads 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.

07-13-2017, 10:36 PM	#12
Seabees Senior Member Join Date: Jul 2017 Location: Eastern Oregon Posts: 205	Re: Snyder's High Compression Heads 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!

07-13-2017, 11:18 PM	#13
Chris Haynes Senior Member Join Date: May 2010 Location: Camarillo, CA and Pine Grove, CA Posts: 2,832	Re: Snyder's High Compression Heads 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? __________________ 1921 Runabout 1930 Tudor Early 1930 AA Speed costs money. How fast do you want to go?

07-14-2017, 05:27 AM	#15
Wick Senior Member Join Date: May 2010 Location: Gwynn's Island Va Posts: 1,389	Re: Snyder's High Compression Heads 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!

07-14-2017, 12:59 PM	#17
gary678* Senior Member Join Date: Dec 2016 Location: Middletown, NY Posts: 165	Re: Snyder's High Compression Heads Thank you all !! Very helpful !! Gary