360-???
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360-???
Ok, Here goes, I haven't said much of anything here, ever. But I have a question for you all.
I got a 360 that my buddy had laying around. I got it for 25 bucks, came out of some truck. I was wondering what the ebst way to build it to make some hi torque numbers, I am not so much a HP guy, I like torque.
So with that said, I need a good build to make my 360 into a 390/410/428 whatever, just so it makes some hi torque numbers.
Please help.
Oh, and I am not so worried about money options, because I won't be building it for a while, but I am hoping to keep the total engine and tranny combo under the 8k mark. Including every like the tinworks and pumps that are needed.
Thanks!!!
Cameron
I got a 360 that my buddy had laying around. I got it for 25 bucks, came out of some truck. I was wondering what the ebst way to build it to make some hi torque numbers, I am not so much a HP guy, I like torque.
So with that said, I need a good build to make my 360 into a 390/410/428 whatever, just so it makes some hi torque numbers.
Please help.
Oh, and I am not so worried about money options, because I won't be building it for a while, but I am hoping to keep the total engine and tranny combo under the 8k mark. Including every like the tinworks and pumps that are needed.
Thanks!!!
Cameron
Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
Welcome to FTE! 
That's cool. Not a lot of people make engines for torque, most go for big hp.
I say build a 410 out of it. Get the 1.66" 390 truck pistons, 390 rods and a 428 crank. Use the heads you have now. Figuring 10cc dished pistons, you should end up with about 9.8:1 compression. Normally for torque I go for the Crane 343901 cam, but the compression ratio is too high for that. Go with the Crane 343941. Of course put headers and dual exhaust on it. Get the Edelbrock Performer intake, not the RPM. The ports on the RPM dont match the ports on your heads. Put a Holley 600cfm vacuum secondary carb on it.
According to my DD2k program, this should get you 443 ft-lbs @ 2500rpm, and 336hp @ 4500rpm.
That's cool. Not a lot of people make engines for torque, most go for big hp.
I say build a 410 out of it. Get the 1.66" 390 truck pistons, 390 rods and a 428 crank. Use the heads you have now. Figuring 10cc dished pistons, you should end up with about 9.8:1 compression. Normally for torque I go for the Crane 343901 cam, but the compression ratio is too high for that. Go with the Crane 343941. Of course put headers and dual exhaust on it. Get the Edelbrock Performer intake, not the RPM. The ports on the RPM dont match the ports on your heads. Put a Holley 600cfm vacuum secondary carb on it.
According to my DD2k program, this should get you 443 ft-lbs @ 2500rpm, and 336hp @ 4500rpm.
Post Fiend
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From: Montana Territory
We have a 390 with the Crane 343901, Edelbrock aluminum heads, and performer intake, with a Demon 750 dumping gas into it. Its also got TRW custom forged pistons, and a set of 427 LeMans rods in it.
Posting Guru
Joined: Aug 2001
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From: Evanston, WY
If money isn't a big deal, a 4.25 crank, stock heads, with a stock or performer manifold, standard headers, 750ish Holley carb, 9ish compression, and a low rpm cam should be a serious stump puller.
-Scouder
-Scouder
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
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From: Smith Mountain Lake, VA
Ya, I like spending other people's money! If ya like torque, aint nothing like a stroker motor, Make it a 410, a little bit of port clean up on the exhaust side with stock heads... Edelbrock Performer, 9 to 1 CR. Headmen hedders, Pertronix Pointless distributor change over kit(get rid of the points) and a 750 Holley Vac. Secondaries,and a electric choke... and the Crane 901 cam!! Run a set of duals out of your headers with a cross over tube!! and Go like hell...
Russ
Russ
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
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From: Smith Mountain Lake, VA
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Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
Ok. I figured up the compression for a 410 with a set of 1.66" compression height pistons with a 10cc dish, with 70cc combustion chambers, and .041" thick head gaskets. I got 9.82:1. To get 9.0:1, you need pistons with a 20cc dish. Where are you going to get those???
You cant just say 9:1 compression, because there are limitations on the available components. You have to look at what's available and go from there. I suppose if you wanted custom pistons you could get just about anything you want, but who wants to spend that kind of money? Of course, if someone comes up with some off the shelf 20cc dished pistons, then great. My luck they probably will.
You cant just say 9:1 compression, because there are limitations on the available components. You have to look at what's available and go from there. I suppose if you wanted custom pistons you could get just about anything you want, but who wants to spend that kind of money? Of course, if someone comes up with some off the shelf 20cc dished pistons, then great. My luck they probably will.
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FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
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From: Smith Mountain Lake, VA
I dont know Kurt, I wasnt thinking of avaliblity? I was just thinking off the top of my head..But with that said, he might have too over bore? and there might be a dish out there? that I dont know for I havent looked at FE pistons inquite awhile....
And then again,you could always take off the shelf piston, and chuck it up in a lathe and Machine you dish in it... Or put them On a Mill and Fly Cut the tops...
Russ
And then again,you could always take off the shelf piston, and chuck it up in a lathe and Machine you dish in it... Or put them On a Mill and Fly Cut the tops...
Russ
Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
You could do that, but unless you own your own machine shop or have a friend who works at one, you're talking more money. Also, in a cast piston you'd probably be reducing the surface to a dangerously thin dimension. In a cast piston, you need it to be thick to control heat buildup.
I'm sure he'd have no problems running 9.8:1 compression with the 941 cam on pump gas. FE's aren't prone to detonation even with the stock 10.5:1 compression ratio. Not only that, the torque curve peaked at 2500rpm, and was as flat as a pancake before and after.
I'm sure he'd have no problems running 9.8:1 compression with the 941 cam on pump gas. FE's aren't prone to detonation even with the stock 10.5:1 compression ratio. Not only that, the torque curve peaked at 2500rpm, and was as flat as a pancake before and after.
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So are my rail type rockers really going to be able to handle 440 ft/lbs of torque and 330 HP? I was thinking about going with Edelbrock heads, a buddy of mine said Dart 2's, but I haven't seen any dart heads for FE blocks, maybe I am just unlucky at searching and they are out there?????
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I have looked in the past for Dart heads for an FE and I never saw any either. It's too bad that someone doesn't make some iron heads that flow well with different combustion chamber sizes for the FE because if they did they would probably sell a lot of them.
Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
Well since it's going to run out of wind at 4500rpm, you're just fine with the shaft mounted rockers. You will want to get the adjustable rockers and their associated pushrods, so you can accurately set lifter preload. You can get those from DSC.
Why are you looking at different heads? Flow only matters at higher rpm, and makes more horsepower. For a low end torque grunt engine the heads you have now on your 360 are perfect.
Why are you looking at different heads? Flow only matters at higher rpm, and makes more horsepower. For a low end torque grunt engine the heads you have now on your 360 are perfect.
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So, after tearing down the top end of the engine yesterday, I found the reason(s) of why I got this engine so cheap.
The intake valve on the 7th cylinder was gone, atleast the head of it. The head on the intake valve of the 4th cylinder was on it's way also.
I found a chunk of the missing valve. It was imbedded into the #1 piston. How it made it to th other bank astonishes me. I have a thought that when the #7 piston went up, it pushed the broken piece into the intake manifold, where it was sucked into the #1 cylinder, then imbedded into the piston.
When this engine was stored, the guy didn't drain all the antifreeze out of it, and it happened to seep into the rocker arm area and make a nice gooey oil/water mess that I had a fun time playing aruond in while I was taking off the heads.
Along with that, some of the water got into the #8 cylinder and rusted the wall, I am hoping it will be possible to bore this out, but if not, I'll just rebuild the heads and sell them and buy a different engine.
Well, any thoughts from you guys? Ideas of what to do with it? Quick wasy to get the rust out of the #8 cylinder to see how deep the rust went and if it is possible to fix it? Well all ideas will be duely noted.
Thanks
Cameron
The intake valve on the 7th cylinder was gone, atleast the head of it. The head on the intake valve of the 4th cylinder was on it's way also.
I found a chunk of the missing valve. It was imbedded into the #1 piston. How it made it to th other bank astonishes me. I have a thought that when the #7 piston went up, it pushed the broken piece into the intake manifold, where it was sucked into the #1 cylinder, then imbedded into the piston.
When this engine was stored, the guy didn't drain all the antifreeze out of it, and it happened to seep into the rocker arm area and make a nice gooey oil/water mess that I had a fun time playing aruond in while I was taking off the heads.
Along with that, some of the water got into the #8 cylinder and rusted the wall, I am hoping it will be possible to bore this out, but if not, I'll just rebuild the heads and sell them and buy a different engine.
Well, any thoughts from you guys? Ideas of what to do with it? Quick wasy to get the rust out of the #8 cylinder to see how deep the rust went and if it is possible to fix it? Well all ideas will be duely noted.
Thanks
Cameron
