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Veteran
Posts: 152
 
| Hi there,
New to the world of obsolete V8 motors, so please bear with me...
I have a 1960 300 with a 413. It hasn't run in decades, and needs to be gone through. From what I understand, pistons for these are an issue. What are my options?
Also hear valves may be an issue.....is that true?
Thanks!
Dave |
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Expert
Posts: 1485
Location: NorCal |
Egge Machine has pistons, their P/N is L2095-8
http://www.egge.com
They also have complete rebuild kits but all of the other parts like bearings, gaskets, etc. are the same as pre-'74 440's.
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Veteran
Posts: 174
Location: Hebron, IN | I know my 413 is using sealed power pistons, = from the machine shop invoice: sealed power pistons Part no. 238 P 30
413 pistons .030 over. |
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Expert
Posts: 4053
Location: cornpatch county, Southwest IOA | Destr0 - 2012-06-22 4:20 PM
I know my 413 is using sealed power pistons, = from the machine shop invoice: sealed power pistons Part no. 238 P 30
413 pistons .030 over. The posts above are about all that is available unless you have pistons custom made ( which is fairly common. Another option is to bore the block 70 thousandths and use 426 pistons..................MO |
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Expert
Posts: 2250
Location: Netherlands | Aftermarket pistons for 413's usually have ridiculously low compression ratio's because the makers have 'truck-use' in mind.
Don't know about the Egge pistons, but if you want a decent CR back in the engine, I would opt for a set of custom slugs, depending on the car's use.
As for valves, that won't be much of a problem.
In any case, you can put any '60s bigblock heads on this motor. The only difference being later heads having 6 bolts per valvecover, while your '60 has only 4.
Only important if you're going for correctness.
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Veteran
Posts: 152
| I'm looking at keeping the motor stock looking and correct as possible. Planing more for highway than the strip. The 426 piston option sounds interesting... |
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Veteran
Posts: 176
Location: Oregon | IMHO, you will be better served by spending a couple extra dollars on forged pistons WITH A MINIMUM OVERBORE than hogging out the holes to the 426 bore.
As noted, the current crop of aftermarket cast pistons are likely to be low-comp and some don't even make the compression they advertise...
Forged pistons are perfectly compatible with everyday driving. |
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Veteran
Posts: 152
| Whose forged pistons would you recommend? I hear flat, domed, and dished top....opinions? |
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Expert
Posts: 2328
Location: Chestertown, NY ( near Lake George) | The 3 pistons you mention are related to compression ratios, forged pistons in the engine you propose is an overkill and they can be hard on the cylinder walls, There really were no low compression passenger car 413's, the piston mfg's for regular cast or hypereutectic pistons can tell you the final compression in the engine with stock heads. So you should not have an issue getting " stuck" with low compression pistons. I would call Egge to start with and tell them what you are doing, plus .030 over raises the compression about .2 of a point anyway. Egge is l2095, Silvolite may be another one or even TRW thru NAPA. To add, .070 over on a 413 can be risky, I cracked 2 426 MP blocks at .030 over in my race car. Plus you would need a rebalance with the 426 pistons.
Edited by Shep 2012-06-23 3:35 PM
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Expert
Posts: 1485
Location: NorCal |
I can't quote an exact number but I've seen the Egge pistons in a block and they're not that far down in the hole. Considering that the early heads have closed combustion chambers and the fact that modern pump gas won't work well with high CR's I think the lower-cost Egge's are the way to go for a driver. |
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Expert
Posts: 4053
Location: cornpatch county, Southwest IOA | Dished pistons are definatly low compression for trucks and motor homes. Less than 8 to 1 Flat top pistons depend on top of piston to center of pin height. I am sure the sealed power pistons are for a stock passenger car 413 with stock compression( not sure what that is. But remember too that that is with factory steel shim head gaskets. Those are a little hard to find, but are available. , Also note that stock early 413 have closed chamber heads and open chamber heads will lower compression significantly.
Also if Napa or anywhere else has 413 TRW pistons That would be news to me!.......................MO |
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Expert
Posts: 2250
Location: Netherlands | The difference between a closed and open combustion chamber is just about half a point in compression I recall.
I also agree that boring your block .070 over just so you can use some readily available pistons is pretty shaky logic.
Think how much the machinist will charge you extra for all that boring and compare that to the cost of a set of custom made forged pistons, which can be made with any CR you wish.
Also not mentioning you have effectively ruined your engine block for further/future rebuilds, AND the fact you're driving around with very thin cylinderwalls which could fail anytime the engine might ping a little.
With thin cylinderwalls there is also more heat transfered faster into the coolingwater, which in turn could cause a hot running engine with cooling problems in return.
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Expert 5K+
Posts: 6204
Location: Big pimpin' | Just swap out the 413 Block for a 440 block and piston's are readily available, engine makes more power, can run larger valve heads due to bigger bores, it's a win/win all around.....413 = Boat anchor for this very reason. NOT a very desirable engine when a 440 looks IDENTICAL to one in outward appearance and weight. |
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Veteran
Posts: 152
| I need to check the numbers to see if this is the original block. If it is, it sounds like the 426 pistons are not the way to go. |
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Regular
Posts: 50
Location: Piedmont, Oklahoma | dukeboy - 2012-06-26 6:13 AM
Just swap out the 413 Block for a 440 block and piston's are readily available, engine makes more power, can run larger valve heads due to bigger bores, it's a win/win all around.....413 = Boat anchor for this very reason. NOT a very desirable engine when a 440 looks IDENTICAL to one in outward appearance and weight.
My 413 is also a 1960 model and the crank is longer coming out of the back for a cast iron tranny from back in the day. So if you were to use a 440 I think you would need to swap cranks from the 413. It's an direct swap as the 413 and 440 share the same stroke just different bore size. Just fyi. Good luck. |
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413 engine parts
