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1989 b250 318 tbi need more power #2126478
08/06/16 12:17 PM
08/06/16 12:17 PM
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sshemi Offline OP
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Gonna use it as a tow truck for my racecar. But at this point i feel its too weak and will probably make me cry on uphills.
Are there any simple boltons that doesnt cost a fortune?
Want to keep it tbi just because it runs so sweet and because of the a500 electronic controlled tranny.
Not looking for 360 power but some more would probably be enough.
Will probably do headers and good exhaust.
Not sure i wanna pull motor to do a camchange as the cam is more than this van cost me
:-)
Thanks

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2126496
08/06/16 12:38 PM
08/06/16 12:38 PM
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You might want to advance ign timing per standard procedure. (IIRC, it involves disconnecting the 2 wire coolant sensor before setting timing). You only want to advance it a little from where it's at, so you can avoid the pinging. Was able to squeek a couple of mpgs by doing that in some ramchargers I had.

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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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
Re: 1989 b250 318 tbi need more power [Re: sshemi] #2126531
08/06/16 01:44 PM
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Nothing much you can do. Headers and exhaust will do nothing but flush money down the toilet.

Re: 1989 b250 318 tbi need more power [Re: DaytonaTurbo] #2126583
08/06/16 03:52 PM
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sshemi Offline OP
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I did adjust timing to where i cant hear pinging. Made some difference but not much.
How about the 360 ecu and tbi?
Ive heard it works but really no proof of it.

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2126588
08/06/16 04:03 PM
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Originally Posted By sshemi

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.

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2126599
08/06/16 04:17 PM
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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?

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2126917
08/07/16 02:00 AM
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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.

13569043_10205100427430537_2533674631179832869_o.jpg

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
Re: 1989 b250 318 tbi need more power [Re: sshemi] #2127033
08/07/16 11:37 AM
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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
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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Manitoba, Canada
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Originally Posted By sshemi
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.

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2128120
08/08/16 07:57 PM
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Seems like best bet would be to try and find a 360. Starting to get hard to find and somewhat expensive here.

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2128557
08/09/16 11:32 AM
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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.html

This, 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
Re: 1989 b250 318 tbi need more power [Re: sshemi] #2128905
08/09/16 08:10 PM
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Water injection (homemade is fine) + 5 degrees more lead, and 10 degrees more vacuum spark may add 3 mpg.


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Re: 1989 b250 318 tbi need more power [Re: sshemi] #2129062
08/09/16 11:09 PM
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Ditching the emissions crap will make a difference alone,this I know.
More timing will help.
Not positive but I think jet made a chip for that year.

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2129325
08/10/16 11:28 AM
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I had a 88 Ramcharger (2wd) w/ the same engine. I removed ALL of the emission garbage including the converter, smog pump and EGR nonsense. The thing ran MUCH better and I got better gas mileage. I was driving 80 miles a day (1/2 hwy 1/2 town) and I was getting 17.2mpg avg.

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2129377
08/10/16 12:25 PM
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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
Re: 1989 b250 318 tbi need more power [Re: sshemi] #2129453
08/10/16 01:48 PM
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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

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Re: 1989 b250 318 tbi need more power [Re: sshemi] #2129754
08/10/16 07:57 PM
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Don't forget the timing cover, pump, and eccentric

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2129849
08/10/16 10:05 PM
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I used the original in tank pump,just put a return regulator on.

Re: 1989 b250 318 tbi need more power [Re: sshemi] #2130107
08/11/16 07:17 AM
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sshemi Offline OP
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I REALLY want to keep it tbi but if that wont give me the power i need im not sure any more...
Ive heard about using the 360 tb and computer giving more power but got no proof of that.
Might try that first if i can find the stuff.
That with good exhaust and removing all the egr and air pump crap could be enough for what i need.
Gears should be fine when not using od. 3.55s

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