All Small Six Back in the Saddle

[cr_bobcat]

5-10 minutes with the mini belt sander and she slides right in. I cut away from the cylinder and water passage and just rotate the lifter once she is down in there.

However, there is some casting flash in the way, preventing me from linking up. I have to go coach baseball for a bunch of 8 year old. Will tackle it with a long reach carbide later tonight.

She does drop all the way in and fully seat. I'm just holding it in place with my finger for the pic.

 

[63 Sprint]

This is great news for SB six owners. Great work and hoping for the best!

 

[cr_bobcat]

Well, I got them in there and connected! I haven't tried the other end but it looks like it will be pretty much the same adventure. Just took a minute with the die grinder on the casting flash. Need to remove more for actually running the engine but it's good enough for a fit check!

 

[cr_bobcat]

Now I'm just waiting to figure out what it is I am not understanding. This was too easy so I must be missing something...

 

[pmuller9]

Now I'm just waiting to figure out what it is I am not understanding. This was too easy so I must be missing something...

missing something... Maybe but I hope not. Next step is to try installing a camshaft with the lifters in place and see if the tie bar has enough vertical clearance.
Any camshaft will do.

 

[DON]

This is looking hopeful!!
Watching closely

 

[drag-200stang]

One thing to watch for is, does the indented oil band around the lifter stay in the block lifter bore during travel. If not oil will be lost and so will oil pressure.

 

[pmuller9]

One thing to watch for is, does the indented oil band around the lifter stay in the block lifter bore during travel. If not oil will be lost and so will oil pressure.

You could do a preliminary check by putting the roller lifter side to side with a stock lifter

 

[cr_bobcat]

You could do a preliminary check by putting the roller lifter side to side with a stock lifter

Done. I used a straight'ish edge to line them up. Looks promising. I'll throw a cam in later today.

 

[comet6]

Not to jump ahead too far, but if we are considering new roller cam , should really address the cam gear drive pin. Configure it like sbf timing set or whatever is adaptable.

 

[cr_bobcat]

Well, I put in a random cam from the garage. There seems to be plenty of link engagement and lots of room before the oil channel would rise out of the lifter bore. So yes, this is possible. I guess the next 5 year challenge is to find someone who will make a cam. But at least step 1 is done for the 250 block! LoL

 

[DON]

Did I miss something?? That lifter in the last photo looks pretty scored up?

 

[drag-200stang]

Do not forget to check the cam side of lifter when on the heal/base circle of cam.
P.S. you are doing a great job.

 

[cr_bobcat]

Did I miss something?? That lifter in the last photo looks pretty scored up?

It's just dirty from me using it to test with.

 

[pmuller9]

Great work!
If you would please see how well the lifter roller is centered on the cam lobes.
On the big block six, the roller centers were .095" off center from the cam lobe centers and the rollers were riding on the edge of the cam lobes.

When we had roller cams made, I had the drawings changed to move the cam lobes back .095".

On a flat tappet camshaft, the lobes are off center to spin the lifters.

 

[cr_bobcat]

I'll have to take a look. I did call Straub Tech and a roller cam is feasible. Production cost doesn't seem like it would be as bad as I had anticipated if batches of at least 25 are run. That said, I am not going to be the investor on this! I've got 4 kids that are in way too many activities! LoL

I do plan on finishing up with this experiment and then trying to do the same on the 200 block though. If this works for the 200, I think it will open up the door for someone to come along and spend the capital to run a batch. I just don't think this will grow legs if it only works for the 250 and not the 200.