Does a TA 413 cam require notched pistons?

Does a TA 413 Hydraulic cam in a 455 require notched pistons for a 455? I hurt the engine in my car last weekend. It appears number 4 rod broke and ripped the oil pan open after 17 years of racing it. I plan to build a new engine next year but in the mean time I still want to drive the car. I have a running stock 73 455 that I just want to replace the rings, bearings and gaskets and put the 413 cam in. The block and heads have never been cut. I plan to use the stock rockers too. This is not a race engine, just something to drive while I figure out what I want to do to the next engine.

Ken

 

Lift would be 500 with 1.5 rockers it will be close.

 

It will fit,..I've pulled a couple stock long blocks apart to find a 413 in it,..but if never hurts to check

 

Well if its going to be in pieces on an engine stand, install one piston, degree cam and check the piston/valve clearance before the rest of the pistons are installed. If its good, install the rest of the pistons, if not you only have one piston to remove to have it and the rest of them notched.

Or if you're good at fabricating you can make the clearancing tools to do the job yourself with a couple of used vales abd a couple of lathe tool bits that you weld to the valves.

After the tools are made, install one piston at a time with some painters tape wrapped around the piston without rings installed so the piston fits snug in the bore but is still able to move. Install one tool/valve at a time into a bare head and bolt snug with a couple bolts. Now subtract the welded tool bit thickness from the valve lift;

Say you use a .250" thick tool bit and your valve lift is .500, so that = .250" now add the clearance you want say .100" that gives you .350" that you will slowly lower the valve tool with the pistons on TDC while spinning it with a drill motor to depth, done. Make sure to vacuum the chips out of the bore before moving to the next bore. Now repeat the process on the other 15 valves and you'll be finished.

 

Thats when I'd call the machine shop

 

...

...or put some thicker head gaskets on it.

 

I am running the 413 cam in my 69 without any issues.

 

Thanks for the info guys. Sounds like it should work. I will check it when I put it together just in case, I just didn't want to waste money on a cam that had no chance of working. Time to make a parts list, I just want to be able to pull the other engine out and drop this one in.

Ken

 

Here is a video of my 69 with the TA413

 

I always loved the sound of a 413!!
Had that cam in a couple cars when I was growing up.

It looked just like yours, engine running as smooth as can be, not even a hint of a wobble but the exhaust note was just bad!!

Blip idy Blap idy blip blip idy Blap!!

 

The total amount of valve lift has very little to do with how much valve-piston clearance there is.
The valve is only at full lift when the piston is down in the bore.... at that point there's LOTS of clearance.
The valve-piston clearance is at it's tightest when between 15* BTDC and 15* ATDC when piston is at the top of it's stroke and the valves are closing/opening.
High duration and tight lobe centerlines are what contribute to valve-piston clearance issues.

 

That 69 sounds and looks great.

 

I also have a set of stock 1970 pistons I might use. Just throwing something together to drive around while I build the other engine up.

 

I have used the TA 413 can in two motors with no problems.

Here is a video clip with stock manifolds and a Gardener exhaust system.

 

That thing sounds great.
Wish I upgraded my cam while my engine was out.
Love that sound.
I have 278 comp extreme in a 73 engine.
Heads milled .015. Block .005. .027 cometics.
Forged speed pros. No notches.

 

Back in the day we would put .490 lift 113 and 118 cams in stock and Speed Pro piston motors. Where it got dicey was when you went to a 107 window rattler (due to long duration)
For larger cams .520 lift and above I used cutting valves to fly cut the edges of the valve reliefs in the Speed Pros and some Jahns pistons. For some reason the reliefs in the pistons were not centered to the valves.

 

I have the 113 cam in my 70 GS conv. , I really like that cam. I've used it in a few cars over the years.