Ok. I really would like to not get a magnum. Do they even work with the np435 transmissions or no. And just for a good baseline do you know how much hp a stock 360la with tbi makes
1991 360la
- Thread starter 91dowdge
- Start date
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TT5.9mag
Two atmospheres are better than one
Don’t think of it as a swap. Think of it as only a few more bolts.
What were you planning to do, put a stroker kit in the existing engine while it’s still in the vehicle?
TT5.9mag
Two atmospheres are better than one
Yes they will all the bolt patterns are the same. You just need a magnum balanced flywheel. A 360tbi probably made about 160hp.
No i already have the engine out. Id just have to tear an engine out at the junkyard. Id get a hell of a deal but its in the woods and it would suck. But if the 360 tbis really see that bad of power I will definitely consider a swap. I thought they were making 200-240hp
TT5.9mag
Two atmospheres are better than one
Look on marketplace. Around here I can find em all day long already out of the truck. A couple hundred more dollars isn’t bad if someone else pulls it. The 1990 360 was rated at 193hp and 283lb/ft if I remember right. Seriously the magnum is a big step up in power.
TT5.9mag
Two atmospheres are better than one
How difficult would it be to shove a 24v cummins in there
TT5.9mag
Two atmospheres are better than one
Not terrible with a complete doner truck but much more involved than swapping a small block for a small block. The magnum is the easy button here I promise.
Are the cummins compatible with the np435 transmission or do I need to get a different one. If it is compatible is it smart or would a cummins be too torquey for it
TT5.9mag
Two atmospheres are better than one
Sorry don’t know the Cummins world that well. The bellhousing is different and I’m pretty sure the nv4500 and nv5600 manual trans’ they used were quite a bit beefier than any of the gas variants.
Im planning on going to the junkyard Friday so I'll let you know what I figure out there
I just read through most of the posts. Post #3 is the starter and the Cummins comment lights the candles. I'm out.
TT5.9mag
Two atmospheres are better than one
He’s in high school and interested in learning. You should participate.
"Read till your eyes bleed" is what I was told in another forum not related to cars.
Would a carb swap be beneficial for horsepower gain? Or is it too much hassle for what its worth
Post #3 was a silly mistake I dont know why youre making such a big deal about it
Cuda416
Well-Known Member
A dished piston does't result in more displacement, it results in lower compression because you're squeezing the same displacement (360 cid) into a larger effective chamber. Flat or pop ups will result in a smaller effective compression space and will raise the compression.
Displacement is what your increasing with the longer stroke due to increased piston travel.
You could take a look at some CID/Compression calculators and play with them to understand better what I'm trying to describe.
Cuda416
Well-Known Member
Swapping a magnum in place of a 360 is 1000 times easier than a cummins. It's the same motor externally.
Are there any good YouTube videos explaining this?
Cuda416
Well-Known Member
You'd have to get a different "everything" pretty much. Gas and Diesle engines are not even close to having the same requirements. You're going to change the fuel system, exhaust system, etc. Just get magnum, cam it, maybe shave .030 off the heads and slap a Chinese airgap with a decent carb and you're pretty much done. Oh, headers....
Cuda416
Well-Known Member
A crap ton. I'd find a couple work system won't allow it.
My biggest problem at the moment is getting my parents to let me buy another engine. Its a challenge already trying to get them to let me build it even though its my money.
Cuda416
Well-Known Member
If the engine already ran, you can just to a refresh and spend money on the important things. Show them you can do a "basic" build and go from there.
You're not building a race engine first time out so keep it simple.
Have someone check the block and see if a rebuild is possible with just a cylinder hone. If so, that's huge since you'll need less machine work if any.
Keep things CLEAN when building and take things one step at a time. Don't get ahead of yourself and you'll be good.
There is an excellent series here on rebiding engines you should look at.
Engine, Transmission & Drivetrain
Always ask questions here. The people are friggin awesome.
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