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Re: slant 6, fuel mileage. what should i get? [Re: elmor] #54935
03/30/09 11:59 PM
03/30/09 11:59 PM
Joined: Apr 2007
Posts: 1,261
ILL
mark7171 Offline
pro stock
mark7171  Offline
pro stock

Joined: Apr 2007
Posts: 1,261
ILL
Quote:

There is a local guy that runs a 225 in 65 Valiant wagon. He's running with the big blocks at the local strip. Knocks down mid to low 12's consistently. They will run hard with some TLC!




that is almost impossible.

9+ to 1 compression I6. 4.88 gear. mechanical cam MP4286681. race everything. Abody stripped to less than 2750 lbs. 4 speed. no rear brake contact. no front bearing drag. suspension set for drag only.

You get....high 14's

....and no mileage worth typing. Save your money.

Re: slant 6, fuel mileage. what should i get? [Re: mark7171] #54936
03/31/09 01:27 AM
03/31/09 01:27 AM
Joined: Jan 2009
Posts: 189
Plano, Texas
D
Dallasdart Offline
member
Dallasdart  Offline
member
D

Joined: Jan 2009
Posts: 189
Plano, Texas
it's been a while since I have been in the slant forum but I know there are several A body guys running 12's. It's possible, just very $$. I had a 66 dart with a slant and a 3 on the tree. Loved that car and after I rebuilt the tired motor it was a strong car.


72 Dart Swinger 360 Project
Re: slant 6, fuel mileage. what should i get? [Re: mark7171] #54937
03/31/09 08:57 AM
03/31/09 08:57 AM
Joined: Oct 2003
Posts: 411
Texas
vynn3 Offline
mopar
vynn3  Offline
mopar

Joined: Oct 2003
Posts: 411
Texas
Quote:

Quote:

There is a local guy that runs a 225 in 65 Valiant wagon. He's running with the big blocks at the local strip. Knocks down mid to low 12's consistently. They will run hard with some TLC!




that is almost impossible.






You REALLY don't know what you're talking about.

There are SEVERAL slant cars that can do 12's (and faster) in the 1/4. But yes, they're race cars. Poster didn't SAY the wagon got great mileage, too. He was just pointing out what they're capable of. FYI:

http://www.slantsix.org/forum/viewtopic.php?t=5579&postdays=0&postorder=asc&start=45


Quote:

9+ to 1 compression I6. 4.88 gear. mechanical cam MP4286681. race everything. Abody stripped to less than 2750 lbs. 4 speed. no rear brake contact. no front bearing drag. suspension set for drag only.

You get....high 14's




You quoting that stupid Mopar Perfomance formula? That info is VERY dated. Modern slanters do better than that with different combo's. You're obviously not "up" on slants, which is cool. But your sources of info are faulty.

Just like 99% of other engines out there, 12 second slants and "mileage" don't mix.

vm

Last edited by vynn3; 03/31/09 05:10 PM.
Re: slant 6, fuel mileage. what should i get? [Re: dulcich] #54938
03/31/09 09:21 AM
03/31/09 09:21 AM
Joined: Jan 2008
Posts: 2,195
ILLINOIS
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volaredon Offline
top fuel
volaredon  Offline
top fuel
V

Joined: Jan 2008
Posts: 2,195
ILLINOIS
Quote:

Stock slant gets about 18 mpg average if everything is right. Very inefficient motor.
-dulcich





go tell the rest of the guys how "inefficient" the /6 is over on the /6.org board and be ready for a flame war! I've had efficient ones and inefficient ones just like I have with V8s. My Dad had an 82 Gran Fury in which I had PLENTY of seat time in that got 28 MPG over the road (NO I am NOT dreaming) /6. Ive seen lotsa "modern" V-6s with all their computer BS and injection that can't do that!!!

Re: slant 6, fuel mileage. what should i get? [Re: B5 Bee] #54939
03/31/09 10:31 PM
03/31/09 10:31 PM
Joined: Jan 2003
Posts: 5,788
Hamilton, Ontario Canada
Magnum Offline
master
Magnum  Offline
master

Joined: Jan 2003
Posts: 5,788
Hamilton, Ontario Canada
Quote:

My '68 V200 gets 25mpg at 65mph. 225, 904, 2.94peg, 185x13 tire





What is a V200?


Quote:

I have a 225 in a 74 Duster automatic with 2.7 gears and it gets 20-25 which is about the same as my 94 Chysler New Yorker with the 3.5.

Mitch




Have similar cars. 225 in a 65 Belvedere and a 94 LHS. Nice thing about the 65 is even if you city drive it and drive it hard it's still gets 20 mpg. Mid 20s are average for highway and our best tank is a straight Full to Empty at 70 mph, was 26 mpg. Odometer was confirmed against GPS.

As for comparing it to the LH with a similar size engine. Our mileage is also around the same numbers. I've seen the mileage in the teens when city driving the LHS but have also seen 29 straight highway. The biggest difference is the performance. 65 ran a 19.9, the LHS is 15.8 in the 1/4.


69 Super Bee, 93 Mustang LX, 04 Allure Super
Re: slant 6, fuel mileage. what should i get? [Re: patrick] #54940
03/31/09 10:37 PM
03/31/09 10:37 PM
Joined: Jul 2008
Posts: 30,248
Florida STAYcation
dIc dOc Deity ! Online penguin-006
The village idiot's idiot
dIc dOc Deity !  Online Penguin-006
The village idiot's idiot

Joined: Jul 2008
Posts: 30,248
Florida STAYcation
Quote:



my bone stock '76 with a 225 1bbl, A833OD, 3.21 gears and 25" tall tires knocks down 19-22mpg city, 25-28mpg highway with a best of 32. a lot of people actually report marginally BETTER mileage after retrofitting the super 6 2bbl setup...








Better MPG than 32 ? .... roger that.

Anyone remember a biz called SVI ? ... they did muchO bester !

Re: slant 6, fuel mileage. what should i get? [Re: dIc dOc Deity !] #54941
03/31/09 10:58 PM
03/31/09 10:58 PM
Joined: Nov 2003
Posts: 12,493
Western Colorado High Desert
moparmarks Offline
I Live Here
moparmarks  Offline
I Live Here

Joined: Nov 2003
Posts: 12,493
Western Colorado High Desert
Fact: The 1976 Feather Duster and Dart Sport Light with the 255/883OD were the first US cars to get over 31mpg.
My 75 Dart Sport with an auto got 27-28 highway all day long. My 79 B200 w/ 318 883OD and 355 gears got 25 highway.
If your getting under 20 in an A-body then something is wrong.


72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, .
Moparmarks Parts & Restorations
Desert Mopar Metal
Grand Jct. CO
970-261-7039
http://moparmark.com/
motormangj@gmail.com
Re: slant 6, fuel mileage. what should i get? [Re: moparmarks] #54942
04/01/09 12:00 AM
04/01/09 12:00 AM
Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
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Rug_Trucker Offline
I Live Here
Rug_Trucker  Offline
I Live Here
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Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
The best I ever did was 29.5 with my 72 Duster. 1bbl 198 long rod short stroke with 3:23's and a 3 speed manual. Usually got 25.4 highway. This is running pump 93.

I added a Holley 2bbl from a 318 headers, .090 off the head, lots of porting, really tight lash. It dropped to 22mpg.

I swear the 2:74's or 2:76's lug the slant and suck the gas.

Dad had a 73 Valiant 4 door that got 13. Slush box PS and air.

I was getting about 16 with my 74 auto 2:76 PS 4 door Dart. I reset the lash tighter than stock, tuned it and got 18+ before it sucked a rag into theoil pick up

I have a post with pics running right now.


"The only thing to do for triumph of evil is for good men to do nothing"

"NUNQUAM NON PARATUS!"
Re: slant 6, fuel mileage. what should i get? [Re: volaredon] #54943
04/05/09 08:11 PM
04/05/09 08:11 PM
Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
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DusterKrazy Offline
master
DusterKrazy  Offline
master
D

Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
Quote:

Quote:

Stock slant gets about 18 mpg average if everything is right. Very inefficient motor.
-dulcich





go tell the rest of the guys how "inefficient" the /6 is over on the /6.org board and be ready for a flame war! I've had efficient ones and inefficient ones just like I have with V8s. My Dad had an 82 Gran Fury in which I had PLENTY of seat time in that got 28 MPG over the road (NO I am NOT dreaming) /6. Ive seen lotsa "modern" V-6s with all their computer BS and injection that can't do that!!!




Yes he should go over and say something like that. I am a fan of the slant as it is a very reliable engine.

They can do anything you want them to providing you know what to do and are willing to experiment.

Very ineffecient?? I guess thats why they made them from 1960 to 1987. Thats 27 years. And for anybody wanting to know the gas mileage on a '76 feather duster, my dads was getting almost 32 on the highway.

Once again a prime example of people not knowing what they are talking about.


Last edited by DusterKrazy; 04/05/09 08:13 PM.
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