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Supercharged /6
#1298893
09/07/12 06:27 AM
09/07/12 06:27 AM
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Joined: Sep 2012
Posts: 2
qtippingbrain
OP
member
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OP
member
Joined: Sep 2012
Posts: 2
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I have a '74 Dart Swinger with a slant six, 3 speed auto, and I'm looking at adding a supercharger. I want to keep the /6 because I'm really not interested in trying to keep a gas guzzler driving down the street, but I want to get some more power out of it. I'm not really interested in a turbo (I want to be pushed into my seat, not squealing tires everywhere). A few questions: 1) What kind of super would be ideal, 2) how difficult would it be to convert to fuel injection, 3) is it possible to add the supercharger with the stock 1bbl carb, or would I have to switch to 2bbl carb and intake? Cheers, and thanks! 
'74 Dart Swinger, 3.7L 225 slant six, 3 speed auto
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Re: Supercharged /6
[Re: Mr.Yuck]
#1298897
09/07/12 10:31 AM
09/07/12 10:31 AM
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Joined: Jan 2003
Posts: 20,226
Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,226
Park Forest, IL
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How good are you at fabrication and tuning? A blower project is not a plug and play proposition.
"Everybody funny, now you funny too."
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Re: Supercharged /6
[Re: 1980volare]
#1298899
09/07/12 01:26 PM
09/07/12 01:26 PM
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Joined: Jan 2003
Posts: 3,920
n.e. pa.
65rbdodge
master
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master
Joined: Jan 2003
Posts: 3,920
n.e. pa.
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Quote:
A properly setup small block will get better/same gas mileage then a bent 6. trust me i know from experience. 
i would have to agree. also you can spend a lot of money building a /6 just to get it to the stock HP level of a 318. i do like the /6, its just not practical to build as a performance motor. i know people do build them and run pretty fast, but the $ per HP gained is high vs. a v8. it is cool to see a built one under the hood of a car though!
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Re: Supercharged /6
[Re: 65rbdodge]
#1298900
09/07/12 08:03 PM
09/07/12 08:03 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Quote:
A properly setup small block will get better/same gas mileage then a bent 6. trust me i know from experience.
i would have to agree. also you can spend a lot of money building a /6 just to get it to the stock HP level of a 318. i do like the /6, its just not practical to build as a performance motor. i know people do build them and run pretty fast, but the $ per HP gained is high vs. a v8. it is cool to see a built one under the hood of a car though!
 Been there, done that, I also had a 74 dart. A 318 will get same or better mileage as the slant. The 318 will also give you a much better platform to build and more HP potential. For what you want, IMO you would be MUCH better off by finding yourself a 90's 5.2 magnum. You can put headers, decent exhaust system and have the nice V8 sound and same or better MPG for less $, less headache, less hassles, less fabbing. Find yourself a computer and engine harness from a 92-95 5.2 ram, dakota, grand cherokee and the factory EFI system can be adapted fairly easily. I grabbed myself an engine harness off of a 95 grand cherokee 5.2 and put it on a 5.2 out of a 99 dakota. Swapped on the sensors and injectors off the jeep but other than that it dropped on after going through the wiring.
Or if you want, you can go carbed or aftermarket EFI controller, put on a better intake and cam and make some decent power. Or throw on a blower like a 6-71 and make more power than you know what to do with!
But if you're dead set on the slant. Yeah it can be done, it has been done, check out the slant forum linked. I can guarantee you that you will spend more time, money and headache trying to cobble together that slant than biting the bullet and doing an engine swap.
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Re: Supercharged /6
[Re: DaytonaTurbo]
#1298901
09/07/12 10:42 PM
09/07/12 10:42 PM
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Joined: Sep 2012
Posts: 2
qtippingbrain
OP
member
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OP
member
Joined: Sep 2012
Posts: 2
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I'm not so much trying to get a ton of hp out of the motor as i'm trying to get a few more hp out of what I have. I don't really want a car that can do a 10 second quarter mile, just something that's fun to drive and yet still practical to use on a daily or weekly basis. I'm considering just swapping out the stock 1bbl carb for EFI just to see what that can do for me, but i'm not really interested in doing an engine/tranny swap. I'll check out what the folks on the slant six forums have to say tip. Thanks for the advice, though, i'm not really sure where I should be starting with all of this since I only recently came into a position to start fixing the car to my liking.  you guys are great.
'74 Dart Swinger, 3.7L 225 slant six, 3 speed auto
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Re: Supercharged /6
[Re: Evil Spirit]
#1298903
09/08/12 12:28 AM
09/08/12 12:28 AM
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Joined: Jan 2003
Posts: 3,472
Lubbock, TX
Erics5th
UsedtobeSatellite6
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UsedtobeSatellite6
Joined: Jan 2003
Posts: 3,472
Lubbock, TX
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There used to be a guy on ss.org who had a '61 or so Dart with a 225 slant that was supercharged/fuel injected. He got the supercharger and stuff from a 3.8L V6 Thunderbird Super Coupe.
Eric
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Re: Supercharged /6
[Re: Erics5th]
#1298904
09/08/12 01:40 AM
09/08/12 01:40 AM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
There used to be a guy on ss.org who had a '61 or so Dart with a 225 slant that was supercharged/fuel injected. He got the supercharger and stuff from a 3.8L V6 Thunderbird Super Coupe.
Yup, and there have been several turbo builds as well. But I know how these projects go, and I still say that you will be much happier in the long run if you just bite the bullet and do the engine swap I suggested. Do a lot of reading on here, ask questions, prepare everything before you start. You'll find it's really not all that hard.
IMO dumping money into what you have is useless. Either swap it out(you won't regret it later) or enjoy the 225 for what it is, a smogger era, low compression slant that delivers little hp and mpg that's mediocre at best.
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Re: Supercharged /6
[Re: quickd100]
#1298906
09/08/12 10:14 AM
09/08/12 10:14 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I for one hope he does the 225. There are millions of smallblocks around that have been hotrodded. I've always wanted to build a blown or turboed /6. There are a few guys over on /6.org that are running 10's with a turbo and 2.76 gears. Dave
seen a few turbos at the track. 4 out of 5 don't run right and the guys are having issues w/ the tune. I'd think a S/C unit would be a much easier way to go. I say do it....but don't dump a ton of money into it. Like I said before you can go on e-bay and get a used or re-fabbed SBC/SBF set up for about $1000-1200. Add a set of headers and a 4bbl intake and let it eat. And if you do blow it up you can use the set-up on a SB
here ya go... at tad more than you need and a little more than 1200 but something like this would work fine. http://www.ebay.com/itm/Paxton-NOVI-2000...685&vxp=mtr
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Re: Supercharged /6
[Re: qtippingbrain]
#1298908
09/08/12 10:50 AM
09/08/12 10:50 AM
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Joined: Jan 2003
Posts: 28,078
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,078
Irving, TX
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I say skip the blower. This would be fun on a slant! http://www.ebay.com/itm/GT35-T3-FLANGE-8...2fb&vxp=mtrThe turbine housing is a decent size and should spool up easily. It'll flow plenty of air for the boost to make life fun.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Supercharged /6
[Re: slantzilla]
#1298911
09/09/12 02:00 AM
09/09/12 02:00 AM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Yes you can build a slant, and you can make it run. Nobody in here is denying that. But why would you want to when you can build a v8 for cheaper and easier? If he swaps in a 90's magnum v8 with the fuel injection system, he can do it for cheaper, easier, better mpg, MUCH less time invested and more power than that slant. Just because you can do something, doesn't mean you should. I had an inline 6 in my jeep, after doing some searching I found I could build that 6 banger up a bit but compared to what a v8 swap would cost I could only conclude that investing in to the 6 was not a good bang for my buck. I have the tools and I have the skills, but I never have enough time or money so I try to maximize my bang for my buck.
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Re: Supercharged /6
[Re: DaytonaTurbo]
#1298912
09/09/12 10:54 AM
09/09/12 10:54 AM
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Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
Rug_Trucker
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
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Modding a slant has become more common. New parts coming out now. There is a new intake from OZ with a mount for a blower.
Even a 2bbl with a good tune will liven up a slant. Look at the parts in the engine parts for sale here on Moparts.
"The only thing to do for triumph of evil is for good men to do nothing"
"NUNQUAM NON PARATUS!"
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Re: Supercharged /6
[Re: slantzilla]
#1298916
09/09/12 11:47 AM
09/09/12 11:47 AM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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Quote:
As for tuning, I've seen just as many dead dog big blocks and Hemis as I have Slants. Just because you swap in a V-8 doesn't mean you can make it run.
Your statement begs the question- Looking at the original post, what makes you think the OP will be able to obtain the results he desires from a slant six?
I can make a turbo four that destroys most V8 but can point out hundreds if not thousands of people who can't set the cam timing right on a 2.2
Setting up a small V8 would be less complex than setting up for a forced inducted slant six that there are no "bolt in" kits for.
My 5.9 in the Duster with 44RH overdrive & lockup gets better MPG than a stock slant six with torqueflight, the OP is under the misconception that a V8 can't get good MPG.
I recall one board member seeing 29 MPG on a V8 Barracuda he was playing with.
I can understand if the OP wants to continue with the current setup because it is there, but forced induction more often than not is going to wipe out any fuel savings he might be getting by running a slant six.
I'd slap a header on it, better intake and small 4-bbl and call it good. Should be able to get a few more mpg out of it and a boost in power when the pedal is depressed.
Swapping to a lockup trans is a no brainer too and should be easy to find.
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Re: Supercharged /6
[Re: gdonovan]
#1298917
09/09/12 12:25 PM
09/09/12 12:25 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
As for tuning, I've seen just as many dead dog big blocks and Hemis as I have Slants. Just because you swap in a V-8 doesn't mean you can make it run.
Your statement begs the question- Looking at the original post, what makes you think the OP will be able to obtain the results he desires from a slant six?
I can make a turbo four that destroys most V8 but can point out hundreds if not thousands of people who can't set the cam timing right on a 2.2
Setting up a small V8 would be less complex than setting up for a forced inducted slant six that there are no "bolt in" kits for.
My 5.9 in the Duster with 44RH overdrive & lockup gets better MPG than a stock slant six with torqueflight, the OP is under the misconception that a V8 can't get good MPG.
I recall one board member seeing 29 MPG on a V8 Barracuda he was playing with.
I can understand if the OP wants to continue with the current setup because it is there, but forced induction more often than not is going to wipe out any fuel savings he might be getting by running a slant six.
I'd slap a header on it, better intake and small 4-bbl and call it good. Should be able to get a few more mpg out of it and a boost in power when the pedal is depressed.
Swapping to a lockup trans is a no brainer too and should be easy to find.
I am a slant 6 enthusiast, but honestly, you'd be better off following hotrodave's "super duper gas mileage 318" thread in the best of....
if you want to make things more fun, find an A/F body A833OD setup. my duster has an A833OD with a 3.21 rear, and it's peppy (it ain't fast) but it's fun to drive, and I consistantly get 24-26mpg in mixed driving. I bet with a mild magnum headed, hydraulic roller 318 with a t-quad, mileage would probably be as good or better mileage, but with 2 1/2 times the HP (my '76 duster was rated at 101 net HP)
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: Supercharged /6
[Re: Pacnorthcuda]
#1298921
09/09/12 02:01 PM
09/09/12 02:01 PM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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Quote:
Jeez... A guy has an idea to do something different, something pretty unique, and most of the advice offered is go with a 318
YAWN! 
As I pointed out, look at the posters first post- He has a misconception that just because he has a slant six he will continue to get "good gas mileage" with a supercharger installed. No offense but a slant six with a non-lockup isn't going to get the best fuel mileage numbers which seems to be a major consideration.
A belt driven supercharger will just make things worse, a turbo would be better if a touch more complex for the average novice.
More power and mpg would be had if a lockup trans (cheap upgrade) was installed along with a header and small four barrel.
If you want to turbocharge or supercharge a slant six, then do so but don't expect to get great mpg fuel numbers when the baseline of the vehicle isn't super great as it is. Minor upgrades will really pull the numbers up and still make the vehicle fun to drive.
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Re: Supercharged /6
[Re: feets]
#1298922
09/10/12 01:38 PM
09/10/12 01:38 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
I don't think you were around when I first built the TT440. I got more bashing and "can't do it" than you'd care to believe.
It took me a long time to iron things out but I did what I could with my very limited budget. Some of those anti's turned around and joined my side. Others still bash me.
I really don't care. I built it for me.
If he wants to boost a six, let him do it. It's his car.
I still say turbo is the way to go. 
IF i were to hop up a slanty, I'd go turbo, as you should be able to cobble together something pretty reasonably, without the parasitic drag of the belt driven supercharger. also, Port EFI is a must--unless you have a hyper pack intake, fuel distribution sucks on a carbed slanty, with the center two cyls running way rich, and the outers way lean due to the differences in runner length
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: Supercharged /6
[Re: feets]
#1298923
09/11/12 12:02 AM
09/11/12 12:02 AM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
I don't think you were around when I first built the TT440. I got more bashing and "can't do it" than you'd care to believe.
Nobody in here is saying it can't be done. It can be done, and it has been done. Our point is, in terms of the OP's hp and mpg goals for the slant, for the amount of fab work and cost invested into it, when you boil it down to the basics he will have more time and money invested into rodding the slant than following a proven and well documented v8 swap. I think most of us have been there, done that at one point in time where we ended up doing something that turned out to be more time/money than it was worth. Just trying to save the OP this experience and point him on a realistic and relatively easy to follow path.
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