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429 vs. 460

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  #16  
Old 04-29-2007, 09:30 PM
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exactly what i was sayin some of that crazy off the wall stuff thats a bunch of $$.it realy dont matter what a guy builds after all we all have seen 9 second clevlands back in the day allso bbf's that run just as good dependin on the cash flow and talent of the builder. if my ride went say 11.0's (it dont just hypathetical)and i had around 3500-4000 into it.and i wanted to run in the 9's for the cost of 10grand it could be done shure but is it justafiable to spend that much more for such lil gain? monster you got one heck of a truck and im shure ya need every thing you can get out of cuzz your into a heads up type racin like i do with my promod chev so that would be justafiable but to the average street guy or bracket racer a high budget stroker isnt nessery
 
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Old 04-29-2007, 10:24 PM
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strokers arent even that high budget anymore... youre in around 400 for the crank and 400 for decent hbeam rods, about a hundred bucks for bearings, and around 500 dollars for pistons, then balancing. you can get the shortblock all done for about 1800-1900 dollars- the 521 and 545 stroker assemblies cost the same. ill have probably about that if not a little more into my 347 stroker assembly for my 302
 

Last edited by darrin1999; 04-29-2007 at 10:29 PM.
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Old 04-29-2007, 11:35 PM
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429cj/460

I think I saw you using "tj" or "cj" for the 70 429 heads. If it is a CJ head (or SCJ) head for 70, then it has small chambers and huge intake ports. The compression was 11 to 1. I had one of those motors and made a 460 by getting some new 460 pistons (dished) and a 10/10 crank for a 460. The 429 CJ/SCJ had flattop pistons w/reliefs. The std 429 heads that year were small chambers, but small ports also. If memory serves me (sometimes dimly ) the std 429 was 10 to 1.

I agree, that you could swap the 429 heads to the 460 and gain some compression, but if they are CJ heads, the ports are way too big for what you say you will use it for. If you are planning a truck motor that will do at least some hauling, the slight RPM advantage of a shorter stroke is not important. Also, if you put the CJ heads (2.25 I & 1.72 E) on a 460 block w/the std dished pistons (all 460's came with dished pistons OEM) you will have to slightly trim the corner of the dish where the intake valve would be too close or hit the piston. Been there, done that

My .02 is that even if you put small port, small chamber DOVE heads on a 460 block, the 10 to 1 compression may be too much trouble to fool with. Maybe a cam would help some, but could wind up a crapshoot trying to make work on most gasoline. I havnt run the numbers for compressions with different heads in a long time, so I dont know how a tall block (10.3 DH) would figure out. I think the 72 blocks were all at the higher DH. LOL anyway!!
 
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Old 04-30-2007, 01:46 AM
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Originally Posted by wizzard351
its all about the money.if ya want cheap stock or mild build or spend the big bucks on a wild stroker hmm $900 for a crank $1400 for a set of cheap aftermarket heads and so on.i dont have $1400 in my 429 PI with pistons,cam,intake,carb,200hp shot of nos, everything.im not shure what my hp is but i dont care. it was enuff to blow out a 9inch friday.what did we all do 15 years ago when stroker kits wernt around or just to high priced ya couldnt touch one
Horsepower doesn't blow rearends, torque does.
 
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Old 04-30-2007, 08:19 AM
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and most 429 or 460s don't have enough to break a 9" anyway unless it's not setup properly, I run a 9" and over 900hp 800ft/lbs and I don't break it, I did manage to break both front axles but never hurt the 9". Versions of the 9" have held 2500+hp blown alky motors without major issues. So if you broke a 9" it was not setup properly or it was just plain worn out.

Originally Posted by darrin1999
strokers arent even that high budget anymore... youre in around 400 for the crank and 400 for decent hbeam rods, about a hundred bucks for bearings, and around 500 dollars for pistons, then balancing. you can get the shortblock all done for about 1800-1900 dollars- the 521 and 545 stroker assemblies cost the same.
Don't forget thats not above what it would cost to rebuild it stock either cause your still gonna need to buy the pistons at about the same price, then your going to have over $100 into the crank for turning it, and another $140 (local price around here) to refurb the rods, plus the cost of new rod bolts, you still need to buy the rings, and bearings etc and my opinion is you should always balance an engine, if you replace the pistons you have just changed the factory balance which really wasn't that accurate anyway, so all said and done a stroker MIGHT cost you an extra 4-500 over a good stock rebuild
 

Last edited by monsterbaby; 04-30-2007 at 08:22 AM.
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