460 MODS - Best Bang for Buck
I'd like to hear what one can do (after market external bolt ons) to a carbureted 460 for performance that gets the most bang for $$ spent. (Examples: Intake, Exhaust, etc.) ??
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Define "Best bang for the buck" :-huh
Technically I would think the most power for money spent would be a super charger, which is bolt on :-X07 But if your talking about "low" cost. . .I'd say headers/exhuast, then a straight up timing set, then recurved distributor, then grinding the smog bumps out of the exhuast ports, THEN intake/carb :-X22 |
Good Tips - Thanks
I have done 2 of those:
1) No smog pumps (used a set of 83-84 headers without the air holes) 2) Straight up timing gear is in. SO I guess a bigger single and less restrictive muffler or dual exhaust might help it breath a little better, eh. Any recommendations on intakes? I have a 600 cfm holley 4150 on the stock intake. Is there a site anywhere giving porting instructions for the exhaust ports? |
Anything to help it exhale to a point is good. You can over do your exhuast though, I'm no expert so I'm not going to rattle off any diameters for you. Maybe a search can guide you there or a more knowledgeable member will jump in here. Same goes for the carb/intake. I'm still learning as well, and I don't want to over carb your motor :-X21 If your operating in the stock RPM range though, money spent on the intake/carb might be better spent else where. I don't think these motors ever had a problem getting air in until you start messing with cam duration and porting heads.
Wish I coulda been more of a help :-X22 EDIT: Check this site out http://diyporting.com/ |
The best bang for the buck is NO2....sometimes it literally goes bang.
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Here is a link to look at some exhaust recommendations.
http://performanceunlimited.com/docu...austguide.html |
ive got weiand stealth and a 750 holley with a nitruos express 200hp plate on a stock botom end and havent had any trouble out of it yet it on my 71. before i spooled the rearend it would dangnear do an endless one wheel peel.every thing cost me less than a grand to do.if you actualy cared about blowin the engine(i dont have spares) i wouldnt run over a 150hp shot tho
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Like I said...just go for the laughing gas. It is cheap and fun and by far the most "bang" for the buck. Besides that, you can pretend you're a dentist :)
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Bolt ons
->N20 always helps!
->It seems that the consensus around the FTE forum is that headers help alot. Finish off the headers with a nice 4" diesel catback(nice mandrel bends are nice too) or custom 3" true duals with some high flow straight trough mufflers. ->Carb spacer maybe? Its cheap too. ->Under drive pulley? I dont know if anyone even makes one, just shooting from the hip here. ->construct some sort of cold air system to reduce the intake air temperatures, and run a 180* thermostat. ->good ingition and fine tuning can go along ways |
Thanks for all the tips! Maybe the post will help others as well.
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What year engine? What vehicle is it in?
Depending on what you have I would upgrade the intake to an aluminum dual plane manifold. Maybe a Weiand Stealth or Edelbock Performer. Headers would be the #2 upgrade. After these two perhaps some nitrous. Used parts can save you money too, sometimes good stuff shows up in the classified ads in this site. |
you can get an underdrive from ebay... they have them avail every once in a while (v-belt-single or dual sheave). a better distributor can help (HEI), plus higher compression (9-10:1) will make it run alot better. of course, headers and intake will always help. then, spend a little bit of time getting it all tuned in, you'll be surprised. nitrous is a good , affordable alternative, but you have to consider your comp. ratio, timing, spark plug temp, and engine temp (you could could modify these to get impressive results w/o the nitro). but funny gas is a blast.
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yeah it is fun the only thing i dont like about it is the 30 mile ride and the 50bucks it cost to refill the 20lb bottle.be for i installed a spool in the rearend a 1/4 mile one wheel peal was very possible.now with good tire and spool about a block long
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