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What will it run? A-body with 5.9 magnum & slicks
#803725
09/17/10 02:17 PM
09/17/10 02:17 PM
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Oakdale CT
gdonovan
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Car- 1974 Duster
Engine- Fresh '94 5.9 magnum with Enginequest heads from Hughes with 1.92/1.62 valves, Crane Compucam 2020 roller cam with 1.7 roller rockers (460/480 lift) windage tray, Performer RPM intake with 625 cfm AFB. 318 exhaust manifolds with original head pipes that open to a 2.5" system with H pipe.
Trans- 904 reworked with extra clutches and valve body, stock 318 converter.
Rear- 8.25 with 3.55's and a locker, 26" x 10" M&H Racemaster slicks, Mancin Racing XHD springs.
I'm predicting well into the 13's with the 318 exhaust manifolds being the weak point in the package, 340 manifolds with 2.5" headpipes this winter.
I ran 13.80's with a 318 (stock 318 heads and 455 lift cam) and a stick a long time ago, with the bigger engine and better heads 13's should be a no brainer but the 318 had headers..
If I get a good hard launch I'm thinking it will dip into the 12's, what say you?
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: gdonovan]
#803726
09/17/10 04:41 PM
09/17/10 04:41 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
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Quote:
Car- 1974 Duster
Engine- Fresh '94 5.9 magnum with Enginequest heads from Hughes with 1.92/1.62 valves, Crane Compucam 2020 roller cam with 1.7 roller rockers (460/480 lift) windage tray, Performer RPM intake with 625 cfm AFB. 318 exhaust manifolds with original head pipes that open to a 2.5" system with H pipe.
Trans- 904 reworked with extra clutches and valve body, stock 318 converter.
Rear- 8.25 with 3.55's and a locker, 26" x 10" M&H Racemaster slicks, Mancin Racing XHD springs.
I'm predicting well into the 13's with the 318 exhaust manifolds being the weak point in the package, 340 manifolds with 2.5" headpipes this winter.
I ran 13.80's with a 318 (stock 318 heads and 455 lift cam) and a stick a long time ago, with the bigger engine and better heads 13's should be a no brainer but the 318 had headers..
If I get a good hard launch I'm thinking it will dip into the 12's, what say you?
I run 12.5/12.6s with mine, i run headers & 3.73s with 27" MT Radials, adversage 60ft. is 1.81, best of a 1.79 so far. Its hard to say with those corked up manifolds, they will be the limiting factory, you really need headers, so i'll say right around 13.0s @ 100, could see 12.9s, most likely low 13s., also depends how much the car weighs with you in it.
BTW, your engine is fresh, so did you use FTs or factory style dished, i'm running on a junkyard short block & RHS heads.
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: joedust451]
#803727
09/17/10 05:12 PM
09/17/10 05:12 PM
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Oakdale CT
gdonovan
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Quote:
I run 12.5/12.6s with mine, i run headers & 3.73s with 27" MT Radials, adversage 60ft. is 1.81, best of a 1.79 so far.
Impressive!
I have a set of 24.5 x 8.5 slicks I'm mounting up as well to give me a bit more gear ratio if required. They were good enough for my 10 second Reliant I don't think my Duster will overtax them!
I'm going to try both sets of slicks at the track along with some carb swapping and other fiddling.
Are you running a 904 or 727? I stuck with the 904 to give me a slight reduction in ET.
Quote:
Its hard to say with those corked up manifolds.
I thought so too but have been eyeballing this article-
http://www.moparmusclemagazine.com/techa...aust/index.html
The dyno results state a 8 hp & 20 ft/lbs difference between 318 manifolds and cheap headers with a 300hp crate engine.
Headers would be nice but doesn't fit into my vision of stock looking under the hood.
Quote:
BTW, your engine is fresh, so did you use FTs or factory style dished, i'm running on a junkyard short block & RHS heads.
Factory slugs.
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: gdonovan]
#803728
09/17/10 05:27 PM
09/17/10 05:27 PM
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Joined: Feb 2004
Posts: 4,501
Gainesville,FL
goldmember
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The stock converter is your real handicap.IMO We ran a stock from the boneyard 360 magnum with The china RPM knockoff,650dp,3.73 gears,9.5" converter,727 trans,shorty headers single exhaust. Went 13.50's.I also ran this truck in various configurations including a well built 500 OD trans,factory EFI,etc. Little bigger cam and a set of bowl blended R/T heads runs 12.50's @107mph. I'd think you'll see 13.30's as it sit's. A decent converter and 12.90's should be no problem.
Last edited by goldmember; 09/17/10 05:43 PM.
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: goldmember]
#803729
09/17/10 05:32 PM
09/17/10 05:32 PM
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Oakdale CT
gdonovan
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Quote:
The stock converter is your real handicap.
Could be, could be. The Duster is a little lighter than a Dak with less frontal area and the Enginequest heads flow a lot better then stock.
While not a race converter it is a 904 converter for a 318 application and I can blaze the tires for a block if I load the 5.9 against it for a millisecond.
I'll have to hook up a tach and see what it flashes too.
This winter the car is slated to get an overdrive trans, either a 44RH or a A-518 (904 or 727 with overdrive) and was going to purchase a good converter then.
Don't have to worry about slippage much on the highway with lockup and overdrive 
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: gdonovan]
#803730
09/17/10 05:42 PM
09/17/10 05:42 PM
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Gainesville,FL
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Quote:
Quote:
The stock converter is your real handicap.
Could be, could be. The Duster is a little lighter than a Dak with less frontal area and the Enginequest heads flow a lot better then stock.
While not a race converter it is a 904 converter for a 318 application and I can blaze the tires for a block if I load the 5.9 against it for a millisecond.
I'll have to hook up a tach and see what it flashes too.
This winter the car is slated to get an overdrive trans, either a 44RH or a A-518 (904 or 727 with overdrive) and was going to purchase a good converter then.
Don't have to worry about slippage much on the highway with lockup and overdrive
Been there done that and went back to a 904. 
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: goldmember]
#803731
09/17/10 05:46 PM
09/17/10 05:46 PM
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Oakdale CT
gdonovan
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Quote:
Been there done that and went back to a 904.
While I'd love to keep it simple, we do like taking the car on long trips and tooling down the turnpike at 3600 rpm gets really, really, old.
With the OD, it will drop the cruise rpm down to 2000 rpm or less and I'll be able to duke it out on the highway with others without running out of steam ;-)
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: gdonovan]
#803732
09/17/10 05:50 PM
09/17/10 05:50 PM
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Gainesville,FL
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Quote:
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Been there done that and went back to a 904.
While I'd love to keep it simple, we do like taking the car on long trips and tooling down the turnpike at 3600 rpm gets really, really, old.
With the OD, it will drop the cruise rpm down to 2000 rpm or less and I'll be able to duke it out on the highway with others without running out of steam ;-)
I can relate to that as well,when I moved to FL from TN that Dakota was my daily driver and tow vehicle. I towed my Spirit R/T with it.I had 2.76ish rear gears and OD. It cruised 70 plus mph just off idle.
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: goldmember]
#803733
09/17/10 06:11 PM
09/17/10 06:11 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
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I think the ex manifolds are a bigger restriction to power than the stock converter, my 68 318 2bbl would stall the factory converter to 2100 RPM, I bet the 360 mag can make it stall a little higher. Those manifolds have some really tiny passages to force all that exhaust out of.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: goldmember]
#803734
09/17/10 06:16 PM
09/17/10 06:16 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
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I'd think about a lockup 904 out of a TBI truck (so you can defeat OD with a flip of a switch) a loose converter (something that stalls ~2800RPM, flashes to 3200) and 2.76's...might be less work than the tunnel mods for an A500...
or switch to a stick and use an iron case A833OD...
the HP loss with the 318 manifolds will be larger than the article, due to the PUNY nature of the 300HP motor's cam.
personally, I'd ditch that crane cam for a comp XE265HR, and add headers...
and the engine doesn't look stock with magnum VC's...I'm using LA VC's with good LA VC gaskets...
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: HotRodDave]
#803735
09/17/10 06:16 PM
09/17/10 06:16 PM
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Joined: Jan 2005
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Kalispell Mt.
HotRodDave
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A note about that article also... you have a little bigger cam and a way better intake so the differance in HP from 318 manifolds to headers will be even larger because even more fumes will be trying to get through there.
Your duster is not much lighter than the little dakota either, those dakotas weigh about 3400 typically and that duster is gonna be around 3300, this is of course assumeing both are stockish weight. The dusters gained a lot of pork starting in 72 and got heavier every year till at least 74.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: HotRodDave]
#803736
09/17/10 06:18 PM
09/17/10 06:18 PM
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Oakdale CT
gdonovan
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Quote:
I think the ex manifolds are a bigger restriction to power than the stock converter, my 68 318 2bbl would stall the factory converter to 2100 RPM, I bet the 360 mag can make it stall a little higher. Those manifolds have some really tiny passages to force all that exhaust out of.
I agree, but...
http://www.moparmusclemagazine.com/techa...aust/index.html
My gut instinct is the manifolds are the weak link but my combo is very close to the crate engine dyno'd in this article.
One way or another I'll find out on the 25th at The Valley.
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: patrick]
#803737
09/17/10 06:25 PM
09/17/10 06:25 PM
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Oakdale CT
gdonovan
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or switch to a stick and use an iron case A833OD...
Car is staying an automatic, a manual isn't an option.
Quote:
the HP loss with the 318 manifolds will be larger than the article, due to the PUNY nature of the 300HP motor's cam.
The cam I have is no great shakes either-
http://www.cranecams.com/index.php?show=...lvl=2&prt=5
I'm running 1.7 rockers which give me more lift and duration, you would be hard pressed to tell it isn't a stock cam while listening to it idle though.
Quote:
personally, I'd ditch that crane cam for a comp XE265HR, and add headers...
Headers and cam changes are not options, the engine package is locked in for what it is. I have another project in the works and I'm starting to shift focus to it.
Quote:
and the engine doesn't look stock with magnum VC's...I'm using LA VC's with good LA VC gaskets...
On the list of things to do, just not there yet. So far at car shows only one person noted it was a magnum motor!
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: HotRodDave]
#803738
09/17/10 06:28 PM
09/17/10 06:28 PM
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Gainesville,FL
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Quote:
I think the ex manifolds are a bigger restriction to power than the stock converter, my 68 318 2bbl would stall the factory converter to 2100 RPM, I bet the 360 mag can make it stall a little higher. Those manifolds have some really tiny passages to force all that exhaust out of.
It's true,the manifolds will hurt HP more than a torque converter. The converter will hurt more in the ET slip. I ran the loose 3.9 converter behind a 360 magnum,it didn't become something it's not,still a low stall junker. Swapped converters and picked up .3. It's not hard to do,you just have to make lot's of laps down the track in different configurations to see.The Dakota weights 3500 with the new owner.
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: Paul_Fancsali]
#803741
09/17/10 07:03 PM
09/17/10 07:03 PM
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Oakdale CT
gdonovan
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Not sure but with that carb and manifold and exhaust 14.0-14.3 around 98-99 mph Need better exhaust and the AFB got to go With a little tuning you could well see 12s
I ran 12.9's on street tires with the same AFB at 112 mph with my 340.
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: gdonovan]
#803742
09/17/10 11:28 PM
09/17/10 11:28 PM
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Kalispell Mt.
HotRodDave
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I see your point and I agree there are better converters out there (me and you both know there is more to it than just stall speed)but they cost a lot more than a 1/2 decent pair of headers.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: gdonovan]
#803743
09/18/10 12:24 AM
09/18/10 12:24 AM
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Grand Haven, MI
patrick
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Quote:
Quote:
or switch to a stick and use an iron case A833OD...
Car is staying an automatic, a manual isn't an option.
Quote:
the HP loss with the 318 manifolds will be larger than the article, due to the PUNY nature of the 300HP motor's cam.
The cam I have is no great shakes either-
http://www.cranecams.com/index.php?show=...lvl=2&prt=5
I'm running 1.7 rockers which give me more lift and duration, you would be hard pressed to tell it isn't a stock cam while listening to it idle though.
Quote:
personally, I'd ditch that crane cam for a comp XE265HR, and add headers...
Headers and cam changes are not options, the engine package is locked in for what it is. I have another project in the works and I'm starting to shift focus to it.
Quote:
and the engine doesn't look stock with magnum VC's...I'm using LA VC's with good LA VC gaskets...
On the list of things to do, just not there yet. So far at car shows only one person noted it was a magnum motor!
that cam seems like a pointless waste of time...IIRC the stock 360 cam is about 10-15 degrees smaller "advertised", and about 4 degrees smaller at .050.
I'd pull the cam and get it reground. I really like my reground roller in my magnum headed 318. www.bulletcams.com did it, I had them use their HR259/316 lobe for both intake and exhaust...it's 12 degrees smaller than yours advertised duration (.006" lift) but 14 degrees bigger, and .072" more lift...
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: What will it run? A-body with 5.9 magnum & slicks
[Re: patrick]
#803744
09/18/10 07:51 AM
09/18/10 07:51 AM
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Oakdale CT
gdonovan
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Quote:
that cam seems like a pointless waste of time...IIRC the stock 360 cam is about 10-15 degrees smaller "advertised", and about 4 degrees smaller at .050.
This cam has considerably more lift than stock, more so since this motor has 1.7 not 1.6 stock rockers.
Stock 5.9 camshaft is - 410/410 lift
Out of the box crane - 434/458
With HS 1.7 Rockers - 460/482
Which is neither here nor there since the subject at hand is "what will it run" not "what cam would I run if it was my car"
The package is what it is and what I had to work with.
The cars primary purpose is to go to cruises and not scare the ol' lady from driving it, you have to ease them into these things ;-)
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