Re: Drag racing Stock 318 upgrade and times?
[Re: JAMESDART]
#2435492
01/16/18 10:07 AM
01/16/18 10:07 AM
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Joined: Aug 2005
Posts: 637 Sao Paulo, Brazil
dart_73_br
mopar
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mopar
Joined: Aug 2005
Posts: 637
Sao Paulo, Brazil
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My Dart.. running on a 318 + ported J-heads. 12:1 CR on E100. 4.88 gears. Manual tranny. Best so far NA 9.2 1/8 1.90 60". Should be ~14.3 in the 1/4.
1973 Brasilian Dart E100, boosted 390"
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Re: Drag racing Stock 318 upgrade and times?
[Re: Dodger73]
#2435549
01/16/18 12:20 PM
01/16/18 12:20 PM
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Joined: Mar 2006
Posts: 9,824 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,824
MI, usa
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Regrind the stock cam, valve springs, timing chain and a Performer RPM. 4.10 will work. We ran a old 318 with stock 360 smog castings, stock short block, 484 purple cam (too big so no tire spin with street tires), stock conveter, stock 360, T quad. 14.0-14.1@100 Doug
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Re: Drag racing Stock 318 upgrade and times?
[Re: Dodger73]
#2435571
01/16/18 12:50 PM
01/16/18 12:50 PM
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Joined: Aug 2006
Posts: 2,497 God's Country Maryland
GODSCOUNTRY340
top fuel
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top fuel
Joined: Aug 2006
Posts: 2,497
God's Country Maryland
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DO NOT put 340 or 360 heads on your engine, the compression drop will kill power. Get an LD4B intake, 750 Holley vacuum secondary carb, small tube headers and most important get at least a 3500 stall convertor and 4.56 or 4.88 gears. You'll need the convertor and gears to get the car to jump off the line.
I love the smell of Deer guts in the morning, it smells like... VICTORY!
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Re: Drag racing Stock 318 upgrade and times?
[Re: GODSCOUNTRY340]
#2435670
01/16/18 03:04 PM
01/16/18 03:04 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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No it doesn't have "that lean burn stuff" on it. It's worse. It has a feedback carburetor and the car is partly run by computer.
The first thing to do has nothing to do with engine. The car may be equipped with a 7 1/4 rear end with as numerically low gears as 2.27, something like that. While the 318 is not a high revving screamer as installed, it would benefit from gears in the 3.23 to 3.55 range. There is a possibility that it's equipped with a more desirable rear such as 8 1/4 or even 9 1/4.
The second thing is to find a mid '70s 360 intake manifold. It will be spreadbore and may or may not contain EGR. No worries. The EGR is easily blocked off with an EGR valve, not hooked up to vacuum. If you are a carb guy, a Thermoquad will work, as will a Quadrajet. If you are bucks-up, a 625 Street Demon will bolt on. This intake is a true high rise and surprisingly good. If the port mismatch bothers you the heads can be opened up to match on three sides, IMHO the inner side of the runner curve doesn't matter as much. If you don't care to use a die grinder the intake will work as is. It's a heck of a lot better than the stock 2-barrel.
Don't let talk of heads cracking bother you. Mine weren't cracked. The cracked ones don't leak and came out of running engines. "Richen up" the carb? How on a feedback carb? Ditch the carb entirely. See above.
The stock cam isn't horrible, 0.390 lift, 191 degrees at 50, 110LSA. I replaced mine with the camshaft from a TBI 360. You can have your stock cam reground by Bullet for used to be $120. The 259/316 Bullet hydraulic roller grind is what has been suggested as the largest and this one is flirting with disaster IMHO as there isn't much valvespring installed height to work with. I ended up cutting down my valve guides (easy job) and using springs like the Comp 901s. If you don't want to go that route I'd suggest keeping lift below 0.430. There may be another stock cam that the cam gurus know about that will work better. They'll have to tell you that. I'd keep the hydraulic rollers.
Dual exhaust is a must, use an H or X pipe if you can. It isn't the converter that's the plug, it's the whole exhaust system. The stock manifolds aren't bad and you have them and they fit.
Transmission is an A-998 and it's a 3-speed with a 2.74 First gear. Nothing to do at this point.
Ignition will be adequate with a stock type electronic distributor, recurved, with stock type coil and ignition box. Seems from my online reference that your engine may indeed have a real distributor with advance and everything. I was surprised at that.
Good Luck with your efforts!
R.
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Re: Drag racing Stock 318 upgrade and times?
[Re: Dodger73]
#2436156
01/17/18 04:42 AM
01/17/18 04:42 AM
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Joined: Jan 2018
Posts: 2 Iowa
Dodger73
OP
member
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OP
member
Joined: Jan 2018
Posts: 2
Iowa
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Thanks for replies.. I already on the parts shelf have a cast intake off a 80s ramcharger and a holley 600 I was thinking of putting to use.. i also have a torker 340 but from my reading don't seem like a good choice . I have a set of A body headers that from my reading fit the car also.. my buddy has hoards of mopar parts and has several surgrips with different ratios.. he has 3:91s and even one with 4:56s which I think might be a but much unless I had real tall tires.. what's the shift point of a stock 318? My buddy today told me he had a dead stock 75 duster with 318 2bbl the only thing he did was put in 4:10s and a set of slicks and it ran 14.90s shifting at 5000. . Is that about right? Guys keep telling me 318s like to rev even in stock form?
Last edited by Dodger73; 01/17/18 04:43 AM.
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Re: Drag racing Stock 318 upgrade and times?
[Re: Dodger73]
#2436346
01/17/18 03:16 PM
01/17/18 03:16 PM
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Joined: Jan 2003
Posts: 14,492 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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1975 Fury wagon (b body that year), original 160k long block(heads never removed), factory 904 rebuilt with a shift kit, original high stall converter, 2.76's or 2.94's iirc, stock 2bbl carb and intake. Removed/blocked egr, recurved distributor, remove cat, single turbo muffler, fresh valve seals. 17.80's in the 1/4..... I can't recall the speed exactly..... Seems like it was close to 80. Kick down linkage adjusted so it would shift just before the motor really started feeling flat...... probably about 4800rpm or so. It was way way more responsive to drive than my friends 79 Magnum with its stock 318 2bbl. The "if it were me" answer is, I'd lose the roller cam. Extra weight for the lifters that the wimpy springs have to control. I'd use the smallest Howard's street force cam and new stock type hyd flat lifters. Another good choice would be a Comp 260h, or the smaller Summit cam. Install some stock replacement 340 springs and new stock style seals. Someone would probably give you some stock 318 flat tappet pushrods. New timing set. Then the other stuff that has been mentioned...... Duals, 4bbl, gears, etc. The stock cam isn't horrible, 0.390 lift, 191 degrees at 50, 110LSA I don't have the OE specs, but a Clevite stock replacement roller cam for the 318 2bbl(part number 229-2153) shows the specs as : .390/.390 lift, 270/270 advertised duration, 191/191@.050, 115lsa, installed at 115.5.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Drag racing Stock 318 upgrade and times?
[Re: Dodger73]
#2436445
01/17/18 05:47 PM
01/17/18 05:47 PM
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Joined: Jan 2003
Posts: 14,492 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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More than one way to skin a cat for sure. i think my main reason for the flat tappet cam preference is the low cost and wider selection.
That Summit cam kit is probably under $110.
I'm pretty sure the factory 318 flat tappet cam is a 110lsa.
In 1990-ish I built a low buck 318. Rebuilder cast pistons, mild port work on some open chamber 318 heads(flowed around 180), std performer intake, 600vs Holley, 1-5/8" headers, 340 cam and springs. I don't remember the tq but it was about 275hp on the dyno..... And I seem to recall it peaked solidly over 5000rpm(like 5500-5700).
I'll have to see if I still have the dyno sheets.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Drag racing Stock 318 upgrade and times?
[Re: Dodger73]
#2436579
01/17/18 09:48 PM
01/17/18 09:48 PM
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Joined: Jan 2003
Posts: 20,165 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,165
Park Forest, IL
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Watch E-bag for an old Edelbrock with the 318 sized ports. They pop up frequently for $100 or less.
"Everybody funny, now you funny too."
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Re: Drag racing Stock 318 upgrade and times?
[Re: Dodger73]
#2436634
01/17/18 11:54 PM
01/17/18 11:54 PM
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Joined: Jan 2003
Posts: 14,492 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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Okay, so my memory wasn’t 100%. It was a Carter 625 carb, and I also ran a Holley 650DP on it. My notes say 8:1cr........ and it liked a bunch of timing. It also didn’t peak as high as I remembered.
Best run was with a 1” open spacer under the 650DP and the timing at 42deg.
Back in 1990 the dyno software was giving the results for every 250rpm.
RPM ——TQ/HP 2500——284/135 2750——294/154 3000——299/170 3250——313/194 3500——314/210 3750——325/232 4000——328/250 4250——327/265 4500——326/279 4750——318/288 5000——309/293 5250——290/290 5500——272/285 5750——250/274
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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