[font size="1" color="#FF0000"]LAST EDITED ON 01-Aug-01 AT 02:50 PM (EST)[/font][p]I was just wondering on how high of compression the 460 can run with stock heads with pump gas. I have 10.5-1 now. Will I have to run racing fuel for a while untill I get my aluminum heads? I am putting in the biggest raditor that will fit, high flow water pump, duel remote oil filter, and high volume oil pump trying to keep it cool so it wont ping.

I hope to have it running this weekend. So I would like to know if I need to go get some racing fuel, or just go and get some supreme at the local gas station.

Thanks


78 F150 400m, c6, holley carb and intake, cam, and some other goodies

87 F150 460, c6, 2800 stall converter, eagle hbeam's, eldelbrock intake carb, crane cam sat spec., balanced and blue printed, 10.5-1 compression, heads ported and polished, full msd setup, everything but roller, aluminum heads, and laughing gas(as for now).

55 F100 stock 292 3 speed (as of right now..heh)

97 Exped stock

 

My 460 runs 12-1 compression, 91 octane. Ignition timing is important. C8VE heads.

 

460v10

Tell us your secret.

 

Indeed.... How DO you do it? Especially with those heads, on only 91 octane? Must me a FordGod or something..
Either that or you run your timing wayyyyyyyyyyy back, and lose so much horsepower it opposites the idea of having 12:1...
What ARE the power specs on that engine?

J/.c

1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh

 

I finished this engine in 1981, then spent 3 more years getting the bugs out. It is a 12-1 compression, no tricks up my sleeve, mostly, but not all stock replacement parts, 460. I don't have any power figures on it but from all the 460 engines I've built in the last 25 years, I'm being conservative at guessing 450 horse, 550 lbs. ft. torque. Its in a 77 F150,factory 460 truck, C6, 2.75 gear(!!!!), runs a 195 degree thermostat with the factory big tank radiator, will not overheat in 100 degree temps with the AC on, sounds like a muscle car of years gone by. I have pulled loaded trailers up in the mountains and deserts, will average 13.5 mpg empty at 75, loaded with a 7500# trailer 9 mpg. Mid range torque is awesome, will idle at 600 rpm all day. Like a lot of the Ford mountain motors in IHRA racing, timing is critical. I run a max of 34 degrees, 10 initial. I do believe if this engine was in a lighter vehicle, it might stand more total timing. I also think that with the current cylinder head technology available, it won't be long to see 15-1 compression 460's running the streets and highways on pump gas. And oh that sound!!

 

Color me highly skeptical.

 

me too, bill

 

I'll color you any color you want. But it won't be Ford blue. The first people that don't think this combo will work are the bowtie brigade. The reason for that is that it won't work on a SBC or BBC unless there is access to a large bore cylinder, and a small chamber head, which they don't have, outside the large IHRA engines. A flat top piston is also critical for rapid flame travel. If you know what that is. Unless you have the knowledge to prove otherwise, don't knock someone else's abilities.

 

That's funny, trying to insult me by implying that since I doubt you can run a 12:1 C.R. engine on the garbage they try to pass off as gas these days, I must be a Chevy driver. Sorry man I'm very familiar with quench areas, flat top pistons and flame travel which is exactly why I don't think you can run that engine with cast iron heads (or even aluminum frankly) on pump gas. I know the 460 is a lot less prone to detonation than other Ford motors and I could even see 10.5:1 (11:1 with aluminum heads) but IMNSHO 12:1 is out of the question. Hell NASCAR engines are limited to 12:1 and those are 358 c.i.d. small block (FORDS) with aluminum heads putting out 700+ hp on racing fuel. You're running 12:1 on a 460 and only putting out 450? It's been 20 years since you built that engine, maybe the real numbers just got a little fuzzy...hmm?

 

The key to your last post was "I dont think you can" . Instead, why not say it can't be done. The reason is you're not sure it can't. I never said this was rocket science, just takes some real thinking about how the whole package works. To most people, rebuilding an engine is putting in a new set of rings and bearings. If you realy want to get the power out of that engine, no matter what brand or affiliation, you have to get outside the lines, and not be afraid to try new and different ways to see how it works. Just because you never tried a combination, or don't particularly like another persons idea, does not make them wrong. I would be glad to go into this engine in detail with you. Its a lot easier than you could ever imagine.

 

Oh by the way, never said maximum horsepower was even a goal. Just a torque motor.

 

Good thing cause you ain't even close on either. Hot Rod built a 380+ hp, 450# torque 400 with less than 9.5:1 C.R., a 2V carb and all the smog equipment. A 9:1 4V 460 with a good cam will put out 450 hp and 550# of torque all day long running on 87 octane. Getting my drift here?

 

Save the semantics and psycho babble. There's plenty of people here who'd love to hear how you built a 12:1 460 which runs on pump gas but only puts out 450 hp and 550#s of torque on your "seat of the pants" dyno. Please feel free to expound at length on how you did this. Don't forget to include the calculations you used to figure out the compression ratio.

 

Oh, you mean the zero deck, .042 head gasket and the 72.5 cc chamber? I think the valve relief takes 2.5 cc. What does that come out to, oh wise one? You sound stressed! Bet that the two hundred thousand plus miles will really toss you for a loop.

 

Guys, Lets not turn this into a bickering match.. Honestly.

Bill, You put out some decent skeptical work here.
460V10, you put out some decent thinking work here.

The object of this forum, correct me wrong, is so that fellow Ford men and women can come together and share their fair ideas, troubles, wants, dreams, and otherwise. Im not going to take either side here, because I have seen some seriously wierd Shht in my life.

460, Your 12:1 comp sounds a bit out of the ballpark.. and your horsepower ratings for such an engine are WAYYYY down the toilet.. a 12:1 engine should be putting out close to 600hp, and on a 460 about 1.5 times that in torque. By all means, if you can, explain in depth the specs on that engine... Cam, timing, ignition, headwork, piston/deck/head specs, valvetrain, etc.. EVERYTHING you can.

Bill.. The only thing you are skeptical of is the 12:1. Maybe he has done it. Like I said, I have seen some craaazy gravy in my life, and this wouldnt be out of the ordinary for me.. I believe fully that he may well have put together a 12:1 engine to run on pump gas.. However, you are right in being skeptical if you are thinking of "run of the mill" engine hot-rodding.

Both of you, let's not turn this into a boxing match, shall we? Instead, try and work with each other..
460, open your mind to some skeptics. THey may have more experience than you.
Bill, Open your mind to a proprieteer.. you just may well learn something new.. never close out new opportunities.

That said, I hope to hear more on this 12:1 460...

J/.c

1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh