Re: 1989 b250 318 tbi need more power
[Re: sshemi]
#2126499
08/06/16 12:42 PM
08/06/16 12:42 PM
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Joined: Jan 2003
Posts: 28,096 Irving, TX
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Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,096
Irving, TX
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You're not going to get there with TBI.
That engine needs compression and a cam to get you where you want to be. The computer won't know how to inject more fuel to make the power necessary. Essentially, a 5.2/5.9 magnum swap is a better idea.
My bro-in-law had an 89 D150 with the tbi 318 and it didn't have the nuts to pull a sprint car up a long hill. He would be down to 30-35 mph with it floored trying to make that slope.
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: 1989 b250 318 tbi need more power
[Re: sshemi]
#2126588
08/06/16 04:03 PM
08/06/16 04:03 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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How about the 360 ecu and tbi?
You're just going to over fuel and throw more money away. The TBI 318 has crap compression, crap heads, crap cam, crap everything. Even a 90's magnum 318, which improved on much of this, is still going to be a dog in a 2500 van with a trailer and car.
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Re: 1989 b250 318 tbi need more power
[Re: sshemi]
#2126917
08/07/16 02:00 AM
08/07/16 02:00 AM
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Joined: May 2003
Posts: 1,751 Graham, WA
Polarapete
top fuel
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top fuel
Joined: May 2003
Posts: 1,751
Graham, WA
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The best thing you can do to make this pull your load is to change the gearing in the axle.
I have a 1987 D100 with a 318 and I plan to use it to pull my Ramcharger on a car trailer. The truck has 245/75R16 tires on it with a 8.25" rear with a tall gear. I built a Dana 60-2 for it that has 4.10 gears and will probably swap it in the fall. I also have a 1990 360 roller cam motor that will go in sometime later after I build it.
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer
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Re: 1989 b250 318 tbi need more power
[Re: sshemi]
#2127033
08/07/16 11:37 AM
08/07/16 11:37 AM
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Joined: Jan 2003
Posts: 28,096 Irving, TX
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Senior Management
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Senior Management
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Posts: 28,096
Irving, TX
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Good point on the gears. Stuffing something like a 4.10 under the van would bump the pulling power significantly assuming yours has the 3.21 or 2.93 rear.
The TBI computer will be your limiting factor. Toss all the related stuff in the recycle bin, build a decent motor, and put the A500 on pressure and vacuum switches to control OD.
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: 1989 b250 318 tbi need more power
[Re: sshemi]
#2127769
08/08/16 12:02 PM
08/08/16 12:02 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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Ok. So how about shaving the heads to get more compression, doing some fancy valve job, and shangi g the cam to a comp cams no computer mod cam? You may get a little more power out of it, but once you put that load on the van, it's still going to be a dog.
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Re: 1989 b250 318 tbi need more power
[Re: sshemi]
#2128557
08/09/16 11:32 AM
08/09/16 11:32 AM
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Joined: Jan 2003
Posts: 28,096 Irving, TX
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Senior Management
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Senior Management
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Irving, TX
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If you ditch the TBI you will have a whole world of options open to you. Instead of digging up a 360 you can always stroke the 318 and build some torque with it. http://www.manciniracing.com/smallblock318.htmlThis, of course, means trashing the TBI but you will have the power you need to haul your car.
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: 1989 b250 318 tbi need more power
[Re: sshemi]
#2128905
08/09/16 08:10 PM
08/09/16 08:10 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,219
New York
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Water injection (homemade is fine) + 5 degrees more lead, and 10 degrees more vacuum spark may add 3 mpg.
Boffin Emeritus
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Re: 1989 b250 318 tbi need more power
[Re: sshemi]
#2129377
08/10/16 12:25 PM
08/10/16 12:25 PM
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Joined: Jan 2003
Posts: 28,096 Irving, TX
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Senior Management
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Senior Management
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Posts: 28,096
Irving, TX
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Doing that work will help but it won't make it into a good tow vehicle. It will still be greatly underpowered.
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: 1989 b250 318 tbi need more power
[Re: sshemi]
#2129453
08/10/16 01:48 PM
08/10/16 01:48 PM
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Joined: Jan 2003
Posts: 9,826 las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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Did the same on a 88 D250 318...removed the tbi and all the smog equipment...got headers with dual exhaust, eddy performer intake...eddy performer carb, and hei distributor...runs a ton better....
completely removed computer and rewired engine compartment.
Tony
70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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