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Author Topic: 76 400, 452 heads on a 413??  (Read 1700 times)

Stan Paralikis

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76 400, 452 heads on a 413??
« Reply #30 on: November 13, 2010, 07:19:59 AM »

Sheesh....  flow rates, valve sizes, seat....  Jeeeeeeeeeeeeeeeeeze.

Jason Goldsack

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76 400, 452 heads on a 413??
« Reply #31 on: November 13, 2010, 09:21:02 AM »

The 516's were off mine when I got the car.. the 452's where already on.

My car see 3000 a year.. but the original 516's would have had 97000 miles on the heads and probably 75% percent on unleaded gas.. I would certainly have to have the seats looked at on mine.

What you are assuming is that the heads without hardened seats have good seats to begin with.


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Jason

(Eileen)1965 Chrysler Windsor, 361/727/2.76 16.49 @ 86 mph

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76 400, 452 heads on a 413??
« Reply #32 on: November 13, 2010, 02:10:29 PM »

Stan, did you just wake up or what?
 
I would hope the valves had a decent valve grind on them and they were sealing properly, but don't figure a valve job requires new seats be installed, THAT IS MY MAIN POINT ABOUT THESE HEADS. Stock valves and stock heads are tougher than any other factory heads out there, leaded or non-leaded configuration. 
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Steve

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76 400, 452 heads on a 413??
« Reply #33 on: November 13, 2010, 04:13:40 PM »

Stan is partially right.  I'm not building a NASCAR special.  But I do intend to drive it more than 1000 a year.  This was originally supposed to be my daily driver.  I went 3 years with out it before I built Polaraco.  Will I ever let Polaraco go?  Probably not. . .
 
This whole discussion is about the feasibility of getting good flowing heads, which possible have hardened seats.  I want to short cut my work by shaping the 352's and it looks like I am OK there.  If I do some valve cutting, they will flow as well as the rest.  That's fine. 
 
I still don't know if the 352's have hardened seats, and the other question is what heads were stock on the 413.
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76 400, 452 heads on a 413??
« Reply #34 on: November 13, 2010, 05:20:25 PM »

I would think they are the same heads I have on my 64 361, 915s or 615s. Nice closed chamber with 1.60  exhaust valves, fine for a stock head of any size engine, like the 413. 
All 452s had hardened seats, done when unleaded gas became more mainstream in the early 70s.
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glen cyr

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76 400, 452 heads on a 413??
« Reply #35 on: November 13, 2010, 06:09:32 PM »

 I just brought a set of 340 "J" heads into the machine shop and although i've got 8 stellite seats to put in,i was only going to do that if the valves were sunk too much. Turns out after probably about 30,000 miles on them,it wasn't the unleaded fuel that killed the valve job,but BAD valve guides.I guess my new brass valve guides may outlast the valve job this time.My machinist is a MOPAR guy and he knows all about the high nickel content in these heads. Actually he mentioned that after so many cycles and the valves coming in contact so many times,it actually hardens the seats (kind of like tempering steel). I elected to spend the money elsewere. Being that i supplied the new stainless valves which are already cut,he only charged me half the price of a job as he only has to do the seats.Not too many other places will do that. $22 to bake,magnaflux and shot peen each head,now there's a deal!
Glen
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