has anyone tried to manufacture a 460 with a high horsepower load that exceeds,-say-550 horsepower without the use of a supercharger or a turbocharger?i'm working on a guy's dragster in the making and want to try to make a solid engine for good use on a track.i'm in the process of ordering the internal components and could use some additional information that i probably wouldn't think of or something i've never tried on this type of engine.the reason for the use of the 460 is that there is a shop with 4 surplus motors that was bought by this guy for 2k apiece.anyways i aught to give you motor heads some data on these things.they are 4 valve motors.have a 4 barrel intake standard.is mid 90's made and still in the crates,not been used,so there should be any defects to worry about.any help would be apperciated in making some monster motors for the drag strip.

 

thread moved to " 385 Series-370, 429, 460" Forum.

 

I've got 550 horse with my 460 and all I did was swap heads and put a cam in. These engines are capable of 700 horse relatively easy and if you want to spend some bucks can do 800+ horse with the stock block naturally aspirated as monsterbaby's is. They need head work, good exhaust and a proper cam. What's the budget lookin' like?

 

There are no 4 valve per cylinder 460 engines and the light truck and car motors were all 4 barrel..

 

the budget is around $5,000 per engine.the first engine is already being worked on.the valve blocks are being made and delivered from a small custom manufacturing company in florida and have been placed on the work table already.looking at a 4" exhaust,maybe a twin 4 barrel on top or maybe a 6 pack.the cams are up in the air as to what ratio to use.anyways i wil keep you guys posted and do appreciate any pointers you can toss out there.

 

With a $5k budget, I'd seriously consider a 521 stroker (4.30 crank and a 0.030 overbore) with aftermarket heads. Figure $2000 for the block and rotating assembly, prepped and balanced. Another $2500 for heads, prepped and ready to bolt on. Another $700-1000 for misc other parts, presuming you have the patience to wait until they become available at less than full retail price (i.e. ebay or swap meet).

With some careful parts selection and tuning, 550 HP and 600 lb-ft torque are reasonable goals.

Brad

 

what are valve blocks? cheers, garsten

 

the valve spring blocks arrived last night.the cylinder heads are still being decided on.am ordering a moroso ignition system.just found someone who will manufacture some 105 octane/alcohol mix fuel for this rig.should be interesting to fire thing up at night on a 1/4 strip.

 

By valve spring blocks I'm assuming you mean stud girdles?

What's your compression? You must be WAY up there to need 105 octane fuel. Sounds like a crazy build.

 

I will bet 100LL AV Gas is cheaper and will do the job just fine.

 

well why would you pay for a custom mixed fuel to get 105 octane which BTW if you run alum heads will be good enough for about 12:1 compression. You can either buy 100LL (not sure on the current price) or buy sonoco 110 for around $4/gal which is what I am running at 13.4:1 compression although I am going to switch to C12 (112 octane racing fuel) which is a little over $5/gal
Also if you are needing 105 octane why so low of expectations to only get 550hp? A engine at that power level should be a pump gas engine.

 

Hmmm...Something doesn't sound right to me, either. The one piece of advice I can give you is this: Odds and ends will run you a LOT more than $1000 even with swap meets and E-bay. My tunnel ram and two carbs cost me that much by themselves and I got a pretty good deal!

 

i've been busy for a while.anyways the question of the comp load was raised.anyways the first engine is complete and is being tested.so far i'm seeing this thing running around a 14.5:1 ratio and 970 hp,with about 1,050 lb. of torque.engine has butterfly grooves on the cylinder heads and high end cams.i think the guy that i'm working for is purchasing the frame early next week.within the next 3 weeks this vehicle should be on a track for testing.hoping for a safe trip.

 

arao(i think) makes four-valve heads for the 460.

 

ummm would you clarify something for me? You are saying that this engine is making more torque than HP so your saying that it is peaking at or actually below 5252rpm which would be required to have more torque than HP. If thats the case you must be running a diesel and you don't need to worry about high octane gas cause it doesn't use gas. and if thats were teh engine is peaking I really want to meet your head porter cause to get that kinda of hp figures at that low of an rpm he must be a god. And lastly if the hp is peaking that low it ain't gonna be worth a crp for a race engine cause your gonna need a lot more rpm than that.