Best 273 and 318 builds (NO 360's please)

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stroked 340 said:
LOL...maybe someday..lol...........
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:)
Is this in doubt? I have done it several times at the track. Even a few very mildly built 340s have gone down before (and yes, they were stock compression and with mild cams like mine). I haven't had too much trouble with stock big block b bodies (383s and 440s, 4bbl). Its not just motor power, its how the car is set up, suspension wise. I have worked a lot on my rear setup for the track.

I have owned 11 second cars before myself and yes they were quick, but it is not to say that a 273 or 318 powered car cannot win races. When built to the same level as other small blocks of the era that are similar in size, it is very possible.

I can't understand why certain folks in this thread are bashing guys here who are trying to take interest in something that is very legitimate.
 
MOPARJ said:
:)
Is this in doubt? I have done it several times at the track. Even a few very mildly built 340s have gone down before (and yes, they were stock compression and with mild cams like mine). I haven't had too much trouble with stock big block b bodies (383s and 440s, 4bbl). Its not just motor power, its how the car is set up, suspension wise. I have worked a lot on my rear setup for the track.

I have owned 11 second cars before myself and yes they were quick, but it is not to say that a 273 or 318 powered car cannot win races. When built to the same level as other small blocks of the era that are similar in size, it is very possible.

I can't understand why certain folks in this thread are bashing guys here who are trying to take interest in something that is very legitimate.
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I'm not bashing anybody and yes it is very doubtful a 318 will hold a candle to a 340 or 360 UNLESS theres a lot more in the 318.i've owned several 340's and never got beat by a 318 thats for sure..
 
Heres my 318 build if I had a 318..

318 block
360 crank
magnum heads ported by self
whatever rod and piston combo works the best for the least money,lol.
alum intake
hydraulic cam


Nothing fancy but I would have the engine built as a zero deck engine.It's the only way to build a stroker imho.Pistons might be hard to get.
 
Bu tthen it's not a 318 or 273. No additional stroke. If all you care about is the "318" on the block then we can add that to a 340 block, make a 42? out of it, and have fun. It's either 3.91x3.31 or its not a 318. Gotta abide by the rules!!!!:D
 
And just to add to what Moper said,the original poster is talking 318 that means using 318 heads with those dinky ports...not 340 or 360 heads...
 
stroked 340 said:
And just to add to what Moper said,the original poster is talking 318 that means using 318 heads with those dinky ports...not 340 or 360 heads...
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As for the 360 crank I thought somone mentioned a 390 stroker on the other page and nobody got on him. The magnum heads come stock on 5.2 magnums so they would be allowed. As would a roller block 318 from the 80's or a magnum block for that matter. In fact let me change the formula to include a hydraulic roller cam seeing as there are plenty of factory roller cam blocks to be had...

In fact the starter of the thread mentioned using the same parts I did so dont get on me for it. Instead read the post,lol.
 
moper said:
Bu tthen it's not a 318 or 273. No additional stroke. If all you care about is the "318" on the block then we can add that to a 340 block, make a 42? out of it, and have fun. It's either 3.91x3.31 or its not a 318. Gotta abide by the rules!!!!:D
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stroked 340 said:
And just to add to what Moper said,the original poster is talking 318 that means using 318 heads with those dinky ports...not 340 or 360 heads...
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In the beginning.........of the thread........my 2nd reply to the OE poster.

rumblefish360 said:
OK, 318 stroker builds are OK then? Seems to kick the words that said, Why is someone allways stating, get a 340/360 out the window then.
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Strokers were OK'd from what I understood. I myself would like to keep the thread a 318 /273 thread only. But it's not my thread.
 
My 318 build for my 97 dak ended up with 247 rwhp, 265 rwtq and a useless first gear!:)
That works out to around 340~ hp at the crank.


Mag heads ported
1.7 roller rockers
R/T cam 204/208 @.050" 114 centreline
M1 intake for magnum FI
ported TB
edelbrock shorty headers
flowmaster catback
Compression is around 9.1

I use the hypertech power programmer which I believe is limiting the engine a bit on the top end, but a fun drive nonetheless.
 
Nope. Posted earlier or not no changing from the 3.91x3.31 or it doesnt count. So says I anyway....lol. :D
 
You know, I have always built 318's because I was stubborn, and liked 318's.....


Now, I add a 4" crank and tell people it is a 318..... LOL

The quickest 318 I had, ran a tire spinning 11.53. And yes, in the world of cam and manifold camarslow's, a 13 sec 318 IS quick.
 
Me too....I have always built 318s cause they are practically FREE.

My favorite 318 build, was a 1988 318 Roller with the deck cut .010, 302's heads decked .010, with 1.88/1.60 SS Valves, dual springs WITH Dampeners, race valve seals., Comp Cams HYD. Roller split duration 224/230, split lift .530 Intake, .520 Exhaust, 110 Center, RPM Air Gap, Holley 750 DP, Mopar Electronic Igition-Orange Box, Headers, Dual 2.5" exhaust

It would scream!!!!

I never calculated exact compression...but stock untouched was rated at 8.8:1, so I figure maybe 9:1???

Ran awesome in my 69 Dart Swinger...no track times...but lotz of Big Cheesy Grin Burnouts!!
 
moper said:
Nope. Posted earlier or not no changing from the 3.91x3.31 or it doesnt count. So says I anyway....lol. :D
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Not even a 0.010 offset grind? That's a quick and dirty way to pick up ~1 cubic inch and an almost-measurable bump in compression. ;)
 
The build I am planing is:

KB flat tops(forged)
273 Forged crank
Unsure about rods, may reuse if it is cost effective.
XE284 cam, I know it is big.... I'll see how it runs then might step down if it is too much.
302 Heads for starters, I want to at least bump them up to 160 Ex valves. They will have a simple bowl blend as well as some port matching.
As for the intake, I will probably run a smaller port for now with the 302 heads(I have some decent ones), then most likely RPM air gap later down the road when I want more power and have better heads.
I want to run these rocker arms:
http://www.hughesengines.com/Index/...a2VyIEFybXMgJiBBY2Nlc3Nvcmllcw==&partid=22765
I really want to run 1.6 ratio but I am going to have to do for research first because that will be a ton of valve lift especially with an xe284 cam(544 to be exact)
Carb, maybe 670 street avenger, anybody think there would be much loss running the 770?

Transmission is a mild 904, going to get a 3000 stall. I have the lower first gear in it as well.

Rear is 8.75 with 3.55s

Looking for quick mid 13s... lol what do you guys think?
 
I think you'll get the time, but I also think the heads could use a 1.88 annd you'll run quicker. No porting? I'd fully port them. The head, as cast, is restrictive. And yes, for the stock head, I think it alot of cam and not enuff gear.
 
I think that cam is waaaaaaaaaay too much. And xe268 might be more appropriaate.Or even a 272. But the cam you have picked just wont work with the plan you have. You would need some deep breathing 302 heads..
 
Dartboy52 said:
The build I am planing is:

KB flat tops(forged)
273 Forged crank
Unsure about rods, may reuse if it is cost effective.
XE284 cam, I know it is big.... I'll see how it runs then might step down if it is too much.
302 Heads for starters, I want to at least bump them up to 160 Ex valves. They will have a simple bowl blend as well as some port matching.
As for the intake, I will probably run a smaller port for now with the 302 heads(I have some decent ones), then most likely RPM air gap later down the road when I want more power and have better heads.
I want to run these rocker arms:
http://www.hughesengines.com/Index/...a2VyIEFybXMgJiBBY2Nlc3Nvcmllcw==&partid=22765
I really want to run 1.6 ratio but I am going to have to do for research first because that will be a ton of valve lift especially with an xe284 cam(544 to be exact)
Carb, maybe 670 street avenger, anybody think there would be much loss running the 770?

Transmission is a mild 904, going to get a 3000 stall. I have the lower first gear in it as well.

Rear is 8.75 with 3.55s

Looking for quick mid 13s... lol what do you guys think?
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Mid to low 13s should be doable. I agree with the notion of bumping up to 1.88/1.60 valves. With the higher RPM power that the motor would be making, a 770 SA carb would be ok, if setup and jetted nicely. If I were to be picking the cam, I would prolly back down one level to an XE268 or XE274. It would still have good top end power and and a bit more bottom end grunt, which would be a help with 3.55 gears off the line on launch.
 
Use a smaller cam. Something like the XS268S solid but run 1.6 arms on it. I'd go with 1.88/1.65 valves and blend the bowls after the 5 angle job. For a carb I'd use the 570SA and I' use it on the Performer 318/360(small port) that should be gasket matched with the heads. Comparing apples to apples the 770 street avenger is equal to a 920ish cfm 4150. Way too large, especially with that 3.55 gearing.
 
My favorite 273 is a 4-14-64 block bored +.040 with the mains torqued to 85 ft lb and honed with FEL PRO blue head gaskets under the torque plates, head bolts torqued to 100 ft lb. TRW forged 10.5's with the domes milled flat, Total seal rings and TREND light weight piston pins on 340 floating rods with SPS bolts and resized big ends, 273 std forged crank, all ballanced. Buttoned up with a HV HP oil pump, a 340 windage tray and a stock 273 oil pan. "72" 340 J heads, milled .040 block side and .038 on the intake side. cc'd to NHRA minimum + or - .2 cc. Port matched and blended bowls. Hardened exhaust seats, 1.88 intakes and 1.60 exhaust. The cam is a used "72" 340 and springs with a cloyes true roller timing chain. It has the thrust plate bolt with the hole through it. "72" 340 rockers and shafts shimmed for about .03 preload. Buttoned up with a "71" 340 intake and TQ carb and a carter electric fuel pump. Gears are 8 3/4 and range from 3.91 to 2.76 depending on intended usage.
 
Why the overtorqued head bolts? All that does is stretch them and distort the block.

The 268S cam is a great choice, but small port heads perform better with single plane intakes. Think stock 273 4bbl, marine manifolds, Holley street dominators, Edelbrock streetmasters, or a real find, the torker 318.

IMO at least, I just have gone dual plane to single plane so many times, and said WOW!
 
dodgetkboy78 said:
Why the overtorqued head bolts? All that does is stretch them and distort the block.

The 268S cam is a great choice, but small port heads perform better with single plane intakes. Think stock 273 4bbl, marine manifolds, Holley street dominators, Edelbrock streetmasters, or a real find, the torker 318.

IMO at least, I just have gone dual plane to single plane so many times, and said WOW!
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Thanks for the suggestions, Head bolt torque was gleaned from some well respected racer in my forgotten past. Been working trouble free for 30 years. These are not small port heads. All the above intakes are a power loss to a stock 340 intake. Power on this engine in a 4 speed 64 Barracuda is breathtaking. It took an old 11" scalloped Borg and Beck clutch to hold it. I'm not changing anything on this motor. It morphed to this incarnation over 10 years from a stock 2 barrel and everything in between. I'm just letting people know what has worked for me. There is not "one and only" perfect combination.

The 66 is now a ballanced and blueprinted Commando with a E-4 Isky cam. The next 273 for the 66 Formula S is likely to be a ballanced and blueprinted +030 273 with TRW forged 2 barrel pistons, 340 rods and 273 forged crank. I'm thinking a small Racer Brown Mechanical cam and Schubeck lifters. I have a set of 302 heads, milled block and intake sides, Port matched, blended bowls, and cc' chambers. Topped off with a Holley Street dominator single plane and 72 Thermoquad Carb. That should be interesting...
 
seems like a couple of guys were being kind of childish about things.

lets just say this is a 273 and 318 In GENERAL thread.........different build variations that start from a 273/318 platform.

we all know you can make power from 340's and 360's and big blocks and so on.......but everyone is entitled to like what they want and to do what they want so just keep the thread based on 273's and 318's.....if you want to talk about a 340 or a 360 or whatever than go start a 340/360 thread HAHAHA
 
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