Posted By: big3fan
new to mopar - 11/08/14 05:09 PM
new to mopar and moparts , recently purchased d250 , 360 tbi , smokey needs engine maybe just heads , found 2000 mpi engine , like to know if it can replace the tbi motor by using the long block and all my accessories , intake tbi unit , exhaust manifolds , transmission , basically are the block and heads the same , would appreciate any help , thanks in advance.
Posted By: RapidRobert
Re: new to mopar - 11/08/14 05:20 PM
Welcome aboard
. I do not have exp in that area but others here do. Hang loose & you'll get some expert guidance
Posted By: buildanother
Re: new to mopar - 11/08/14 05:26 PM
Don't know if there is a manifold that will adapt your throttle body to magnum cyl heads. I had a few of those tbi 318-360's over the years, and found them very reliable but not as powerful as the magnum series. Roller cams and roller chain-gear sets were on many of them too.
Posted By: Supercuda
Re: new to mopar - 11/08/14 05:53 PM
You'll have to redrill the intake bolt holes in the heads on the Magnum. The Magnum angle is pretty much vertical, where as the LA is more like 45 degrees.
The ends of the Magnum heads are a bit different than the LA's so you will have to mock up and rework the accessory brackets to fit. Doing this on the engine stand is the easiest way.
Magnums use a different external balance weight, you will have too address that as well.
The Magnum does not use air injection so you will have to seal those ports in the manifolds if you reuse the LA manifolds.
Posted By: feets
Re: new to mopar - 11/08/14 07:43 PM
Welcome aboard!
I'd be tempted to drop the entire magnum in the truck and drop a carburetor on it. The necessary intake can be had for about $300. You can probably use your factory fuel pump with a regulator and a return line.
The tbi was a great running engine but was sadly lacking in performance. It'll get you around town forever but don't expect much enthusiasm.
The 5.9 Magnum has a lot more power and performance.
Posted By: big3fan
Re: new to mopar - 11/09/14 12:00 AM
thanks guys for all the great info , looks like rebuilding the original tbi motor or a least the heads ,would be the most simplistic way for me to go .
Posted By: feets
Re: new to mopar - 11/09/14 12:14 AM
If you're going to rebuild try for a bit more compression. Other than that, there isn't much you can do to get more power without upsetting the tbi.
There's always the carburetor approach or aftermarket EFI. With either of those the sky is the limit.
Posted By: DaytonaTurbo
Re: new to mopar - 11/09/14 07:05 AM
You can do the swap however like said the intake manifold isn't a drag and drop as the angle of the intakr manifold bolt holes is different. The easiest way to do this would be for you to get an aftermarket intake manifold. They make carbed intake manifolds for the magnums. You could fairly easily mate the tbi to the carb intake.
Do not try to put the tbi on top of the magnum intake. Those are designed for dry flow only.
Posted By: RapidRobert
Re: new to mopar - 11/09/14 07:38 AM
An option would be a "crosswind" intake (carb flange/mag bolt pattern for several hundred $$$, a garden variety LA timing cover/fuel pump and hughes cam extension (for the eccentric to power the mech fuel pump) If going carbed. I think the LA water pump is required also. Not sure what dists yours would have but if needed a common LA 70's electronic dist would drop in
Posted By: RapidRobert
Re: new to mopar - 11/09/14 07:40 PM
Yes Feets plan would be even better (& easier). I did not know Eddy had a mag intake. I'd think it's quality would be better than the crosswind tho I hear they have taken care of alot of the casting issues the early production ones had
Posted By: DaytonaTurbo
Re: new to mopar - 11/09/14 10:52 PM
If the op wants to keep the tbi, his best option would be to put the crosswind magnum carb intake on and put the tbi on top of that. Everything else would basically drop on.
Posted By: Supercuda
Re: new to mopar - 11/10/14 12:24 AM
Guess we ought to ask why he wants to keep the TBI, if it's for smog then the only aftermarket intake I know of with EGR provisions is the Performer and it's not any more Magnum compatible than the stock TBI intake and he may as well keep that by redrilling the heads.
Posted By: DaytonaTurbo
Re: new to mopar - 11/10/14 01:31 AM
Sounds like he likes how the engine runs, just his is smokey and tired. A used magnum engine would be in way better shape and offer some hp improvement even if the tbi is retained. If it wasmmine and an everyday driver and peak ho is not the goal, i would keep the tbi.
Posted By: Supercuda
Re: new to mopar - 11/10/14 02:31 AM
Having played with one of those TBI systems in it's stock form, I'd ditch it myself or convert to megasquirt controlled.