52 A puller

[2cylinderfan]

Hey guys I am putting together a puller out of my 52 A, I have a powerblock and a heisler head lined up and I am trying to scrape up enough to get a 9 in crank, my question is how hard is it to make a 9in fit in there? I know you have to grind some of the crankcase but I was wondering if someone could fill me in on everything that needs to be done to make it work nice. and with a motor built as described 20% over rpms will be okay?

 

[mta puller]

I built a 9" 6 1/8" inch A several years ago, one thing I did was I took out the back wall of the tranny case, I had a tin pan made and bolted it in. It made a nice job and saved having the mess of oil running the whole way through, also saved making two small pans. I put rags on the gear shafts and cut it with a small air body saw fitted with a good hacksaw starret greeen stripe blade. this worked really well and kept the major dust down. then did the same on the top of the case up where the top plate goes on , for the left rod only. dont get crazy on compression and it will live a long time, I built mine in 1995 and its still running as far as I know. the rods were welded and never gave any trouble. the parts were all Keith Merfelds and worked flawlessly.

 

[Drew]

9.000" isnt hard to make fit. I would recommend going with a 3.000" crankpin instead of 2.750". The crankshaft will be quite a bit stronger this way. You will have to notch the camshaft for the rods to go by. How much depends on the thickness of the rods opposite the rod cap. You will also have to grind some on the oil filter head for the #2 rod to go by.

 

[2cylinderfan]

I am working with jdbpuller on this one, I think he has a crank to send me, but I'm not sure so I was wondering who to go to, to get it reground if he doesnt have one. One thing I am worried about is reliability, I have never built one before so I am kind of lost, what compression should I shoot for and how do you figure out compression? like when someone says 10 to 1, to show my stupidity I really dont know what that means I was also wondering if you have to do anything to the clutch with that much more power?

 

[Anonymous-0]

I have an A that is 9" stroke,6 1/8" bore,10-1 compression. Makes good power but have had trouble getting the timing right. It didnt have many pulls on it at all and it broke the crank right at the #1 journal.From talking to guys here and there they seem to lean towards the timing being the issue. What do you think? One guy who ran this combo for years said he has had cranks to fail but his was always on the clutch side. I run my RPM around 1227-1300,I dont think that was the problem.

 

[jd b puller]

(quoted from post at 08:16:38 10/09/08) I have an A that is 9" stroke,6 1/8" bore,10-1 compression. Makes good power but have had trouble getting the timing right. It didnt have many pulls on it at all and it broke the crank right at the #1 journal.From talking to guys here and there they seem to lean towards the timing being the issue. What do you think? One guy who ran this combo for years said he has had cranks to fail but his was always on the clutch side. I run my RPM around 1227-1300,I dont think that was the problem.

Rino, without smearing the maker of your crank, did you show it to him? Maybe it wasn't welded correctly, maybe it had a stress fracture before it was welded.

What are you running for timing?
Mag, Dist, MSD, etc?
What about fuel?

 

[BushogPapa]

If your clutch is in good shape, it will handle anything you can throw at it.!!

Service it and replace the friction linings and you should be good to pull...!

 

[Anonymous-0]

JD b puller do.you have an email address where i can contact you? Thanks.

 

[jd b puller]

Should be open now.

 

[Anonymous-0]

uncompressed volume divided by compressed volume usually in CC's....to get an idea, without measuring, i use this calculater.
http://www.robertscarbrepair.com/compress.asp

hope this helpes.
compression ratio

 

[RandyB(MI)]

You are not "stupid" but you ARE unknowlegable about the internal workings and the theory behind the operation of the internal combustion 4 stroke/cycle engine. You need to study up on this so you know what everything is , where it is , what it does and why it does it BEFORE you attempt to alter anything. If you just throw parts at it , even the help you get on here can't save you from building a bomb. If you don't understand compression ratio then you should not even be asking about 9" cranks. If nobody else on here wants to be the "a-hole" to tell you this , then I guess I'm elected. Sorry.