413 questions

[Lowhound]

My neighbor is in the process of moving(not his choice either). He has a 413 from a 71 motor home. It has 42000 original miles. I dont know anything about 413s but I can get it cheap.About a year ago he purchased a new 650 carb & Hooker headers for it. Like I said I can get it CHEAP. Are there many performance parts available for these or would it make a better boat anchor?

 

[Cazbah362]

If you want to rebuild it, finding pistons is tough and they are expensive. However, if you want to you use the short block as is for a low budget build, not a bad motor. They are low compression, and everything else from B/RB's works on them (other than B manifold and distributor, since the 413 is an RB). But, it should have a forged internally balanced system withg decent rods.

I used the shortblock from one and put in my Belvedere, no issues and decent power.

Good luck - BTW, seems to be a pretty common topic, use the search function with 413 and should find a lot of past post's.

 

[Meep-Meep]

You are limited in piston selection but that's about it. Nothing wrong with a 413, especially a cheap one. If it runs, or can be made to run well without a rebuild, then use it. Is this the industrial engine? If so then you will need to change the top end to pass car stuff but that's no big deal. Performance parts like intakes, cams, distributors, etc... are the same as a 440.

 

[PettyBlue72]

One question. If the 413 block is an RB block why could you not just bore it out to 426, 440 etc and use the more common pistons?

Joe

 

[Mr4Speed]

i believe that it can't be bored to 440.
I have a 413, from 1963, castingno. 852029-3, dated11-1-63 and i will have it bored to 426 c.i. Muscle Motors offers pistons for an engine like that.They can also get you a strokerkit if you like ( same as for a 440, but with different pistons ) They are very helpfull and you can always call them with any questions you have.
I would get the engine, and maybe, with 42000 miles on it..the shortblock is in a perfect condition. Get yourself some decent heads, cam, intake and carb and have fun with it!

good luck,
Marcel
the Netherlands

 

[detmatt1]

Go with a pair of 915 casting heads for some easy compression out of it. I would jump on it if the price is that good. That low mileage might meen just ad some new oi seals, drop it in something and go!

 

[72 Charger SE]

One question. If the 413 block is an RB block why could you not just bore it out to 426, 440 etc and use the more common pistons?

Joe

This would depend on whether there is enough cylinder wall material to bore the block that far without making the cylinder walls too thin. The block would need to be sonic checked.

 

[Meep-Meep]

Boring a 413 to 426 is usually no big deal but you still have the same problem with piston availability.

 

[Garys1969RR]

I used to run a 413 in a 1965 Plymouth Belvedere. Used 915 ported heads, Ran low 12s at 5200 feet! But I was running about 13 to 1 C/R. Auto trans, and Holley 4 barrel. In the 70s, High Comp pistons were more available for this motor. The 413 is an RB with a cyl bore of 4.19". The 426 bore is 4.25". So you would have a .060" over size. You can also come up with a 426 wedge by putting a 413/440 3.75' STROKE CRANKSHAFT in a 383 block. As the 383 is also a 4.25" bore. So definitely grab this motor. Run it awhile, or just use the crank and rods to build a stroker motor. It has a strong bottom end. Good luck.

 

[340Arrow]

413

You can bore the 413 .060 over. The factory bored these motors over and then overstamped the 41 number on the pad with 42. The only pistons I have found are cast. Forged are custom ($800 or so). With closed chamber heads, a .020" head gasket, and some minor head and block surfacing, you can get to about 9.5 to 1 compression.

 

[Ltlgto]

I used to run a 413 in a 1965 Plymouth Belvedere. Used 915 ported heads, Ran low 12s at 5200 feet! But I was running about 13 to 1 C/R. Auto trans, and Holley 4 barrel. In the 70s, High Comp pistons were more available for this motor. The 413 is an RB with a cyl bore of 4.19". The 426 bore is 4.25". So you would have a .060" over size. You can also come up with a 426 wedge by putting a 413/440 3.75' STROKE CRANKSHAFT in a 383 block. As the 383 is also a 4.25" bore. So definitely grab this motor. Run it awhile, or just use the crank and rods to build a stroker motor. It has a strong bottom end. Good luck.

Would this hold true for a '65 New Yorker 413 too? It's stock right now with about 75k on the clock. Thanks!

 

[fourforty6pac]

I thought the motor home motors were stronger. Was it the 413 that had extra webbing in the lower block? I dont in what year motors, but I read that they had bigger water passages in the heads and used sodium filled exhaust valves.

 

[66 coronet]

Motor home blocks were cast from the same alloy as the max wedge blocks. the motor home/truck heads have a diffierent bolt pattern on the exhaust flanges, the carb has water heating instead of exhaust and the water pump sets high and bolts to the front of the heads so the entire top end must be replaced to use this in a car. The pistons on these engines are dished to give it around 7.5 compression so short of replacing the pistons you can use 915 or 516 casting closed chamber heads to get some compression back. You also need to pull the front cover and check the timing setup as some of these engines used gear drive on the cam and will have a reverse distributor

 

[godfatherofchry]

My neighbor is in the process of moving(not his choice either). He has a 413 from a 71 motor home. It has 42000 original miles. I dont know anything about 413s but I can get it cheap.About a year ago he purchased a new 650 carb & Hooker headers for it. Like I said I can get it CHEAP. Are there many performance parts available for these or would it make a better boat anchor?

If it only has 42000 miles on it why does it need bored just change the cam and run it.I put one in a super bee and runs very good.it will take a good 440 to run away from it......Artie

 

[Garys1969RR]

In reply to Ltlgto, The passenger car 413 engines were quite strong. Thats far as durable strong, and strong running. A friend had one in a 1963 Chrysler 300 K, and that 4000 pound tank would keep up with my 3600 lb. 68 Roadrunner 413. I was amazed. I've always had good luck with the 413. The one I raced had unbelievable torque and power! Too bad no one makes the pistons unless you go custom built. I'm almost done building a 451, and will let you know how it runs. Am using the same type dome pistons as the 413 had, 906 heads on the 451 as opposed to 915 s on the 413. Almost identical cam, 509 lift and 292 duration. This combo worked well back in the 70s, and hope it still does today. C Ya

 

[Kern Dog]

Are there many performance parts available for these or would it make a better boat anchor?[/FONT]

#1: Some
#2: No

You have 411 questions left.

 

[Garys1969RR]

Ha ha thats funny! Kinda like 96 Tears

 

[PurpleBeeper]

I had a '65 413 and a 440 side-by-side years ago and compared the blocks. The cylinders are smaller, so you can't just bore it to a 440 size, so I believe the pistons are the only issue as the guys above mentioned. It also has the smaller (non HP) cam and the smaller exhaust valve (closed chamber) heads.

You could replace gaskets and check the bearing and just run it as is. A stock HP 383/440 cam would be a good minor upgrade. For a little more money you could enlarge the exhaust seats and put the larger exhaust valves in too. All of these options are pretty cheap and a 413 is onlly 27 cubes short of a 440.

 

[Garys1969RR]

There is a guy in Aurora, Co sells master engine re build kits ( with pistons) for the 413 and many other engine sizes. You can find his ad on C List Denver. He is at 2525 Geneva.

 

[HT413]

Pistons are too low compression to make any power for street application, so they gotta go. As stated above, the pistons are not redily available and cost $$. No reason u cant bore to 440 or even 440+0.030 or 440+0.060 But u need to have it sonic checked first. Also, remember, as with mine, the harmonic balancer on some of these has an extra 1" spacer that kills clearance for a cooling fan. Sounds insignificant but u cant drive it if u cant cool it.