I always have some off-the-wall question.... a Mazda pickup this time.

[JollySipper]

Here goes my question...... I've found what could be a cool little project pickup on Craigslist. The guy only wants $300 for it. It would need an engine, but is otherwise in good shape! So that has me wondering, has anyone ever swapped a Miata engine into anything? The little truck is a Mazda, and short of an RX7 engine, I believe the Miata would be a peppy little transplant. Here's a pic from the ad............

I can just picture it with fender flares and a sticky wheel and tire combo to aid in enjoying the little engine! A bit of a corner carver...........

So, what say my mechanic friends? Would a Miata engine be a good idea?

Edited 5 hours ago by JollySipper

[rattle can man]

The question is what engine is the truck. If you google Mazda B series engines you might be surprised how many vehicles used this engine family. The same engine block used in the Miata was used throughout the Mazda line-up and in some Fords, Mercurys, and Kias (through 2000ish) from the mid 80's into the 90's. The 1.3L in Ford Festiva and Aspire was externally identical to the 1.6L (1.6L was just a bored out 1.3), so a swap of these two is simply a bolt in swap.  But you may need to swap the computers or switch to aftermarket engine management. Find a Turbo 1.6L from a Mercury Capri or Mada 323 for some scoot. 

Clearance issues need to be checked for. Twin cam 1.6L heads are wider than single cam heads. Miata accessories mounted in different locations on than the front-wheel drives. Front wheel drive engines and rear wheel drive engines have the distributor at opposite ends of the block. And the B8 (1.8L) variant had a longer block to accommodate the larger bore.

How do I know this? I've read up on engine swaps for Ford Festivas.

[stavanzer]

I've driven a B2000 pickup back in the day. I really liked it. It was a Shop Truck but I used it to deliver parts a couple of times. It took the Grapevine (Hwy 99/I5-5) to Los Angeles with ease.

Sounds like fun project!

[JollySipper]

1 hour ago, rattle can man said:

Miata accessories mounted in different locations on than the front-wheel drives. Front wheel drive engines and rear wheel drive engines have the distributor at opposite ends of the block.

This is kinda the reason I was thinking the Miata would be a good donor, it being RWD........ and there's a bunch of them around here! 

I'm sure the engines are nothing alike, but I had a Mazda hatchback for a while as a work car. It held up until 250K miles! The clutch finally went out...... That little car got me to a bunch of jobs!

[stitchdup]

if you look for a second generation 1.8 miata you can get an improved engine and a turbo depending on the model. some of the first gens had a bit of a habit of blowing the head gasket if it has been sitting while the later ones seem to handle being left for longer. also that truck looks to be in pretty good shape but give the rails from the seats to rear axle a very good inspection. if its been overloaded too often they can crack from the top down unlike landrover that crack from the bottom. You might even find the front suspension and rear gears will fit the truck. The miata is getting popular for morris minors now in europe so there should be engine mounts and stuff available if the truck ones dont work

[Zoom Zoom]

I bought a new 1986.5 B2200 SE-5, great little truck. 

The example shown is a B2600 extended cab, that's a Mitsubishi engine. 3100 lb. truck w/122 HP from the factory. If you want to do an engine swap, consider that this is a vehicle that weighs 800 lbs. more than an early Miata. 

As an example, my Mazda-obsessed buddy got a B2600 extended cab and did a 13B rotary conversion for a more modern '80's take on the Mazda REPU from the 70's that was based on the Ford Courier. In theory an interesting conversion for overall horsepower, but reality is it felt like a dog because rotaries make all their HP above 5,000 RPM. It was totally gutless in normal traffic. Probably needed a different transmission with shorter gears. He ended up selling it to someone else. It was a quality conversion by a master Mazda mechanic, but the results were underwhelming. 

Trucks need some torque. You aren't going to get a bit of torque out of an early Miata engine w/o a turbo or supercharger. 

3rd generation (06-'15) Miatas ran a 2.0 MZR. A popular swap for them is getting a 2.5 out of something like a Ford Fusion which revs a bit slower but makes more HP and torque.

If you're going to go to the effort of a motor swap, you need to do a lot of research. That truck doesn't need a ton of HP, it needs torque. In theory a Miata motor might be a fun idea, but reality is it'll be a lot of work for a very underpowered truck. I'm sure if you dig around you can find some information on what other people have put into the old Mazda PU's for more HP at minimal cost for a decent junkyard engine swap.

Edited 9 hours ago by Zoom Zoom

[slusher]

I drove one of those trucks and was impressed how good it drove almost new new in the mid 80’s.. I have not seen one on the road in a long time…

[Rob Hall]

I remember seeing those in the late 80s..my late older brother was a salesman at the local VW-Mazda dealer in the late 80s-early 90s and he liked them a lot, though he drove an '84 Chevy S-10. 

Edited 9 hours ago by Rob Hall

[Mike 1017]

TJ,

Get some info from a Miata Car Club or a Miata Forum

[rattle can man]

If it is a different engine series in the truck, it will mean a little more work. But you can do anything as long as you have the time and resources.

[Ace-Garageguy]

Zoom Zoom got it right. 

The additional weight of the truck over an early Miata is the major consideration.

Edited 8 hours ago by Ace-Garageguy

[NOBLNG]

See if you can find a Mazda forum that has a truck section. You could likely get some experienced advice there. Here’s a couple.

https://www.mazdaworld.org/forums/b-series-truck.109/

https://www.mazdaforum.com/forum/mazda-bt-50-pickup-trucks-18/b2600-47009/

 

 

Edited 6 hours ago by NOBLNG

[iamsuperdan]

Would be very cool for sure. Heck, that truck left bone stock would be very cool!

 

However, a Miata swap would be relatively straight forward. But as others have said, the truck is heaqvier, so would the extra power a stock Miata engine has be worth the effort in the heavier platform?

Now...the Miata aftermarket is plentiful, so a miata engine, with some new parts and maybe a turbo? ow you've got something awesome, and not insanely expensive.

 

Body looks super clean on the truck. For $300, I'd probably buy it anyway.

 

[JollySipper]

Thanks for the replies, fellas! Here's a link to the ad for the truck, so you can have a better idea of it's condition......

https://raleigh.craigslist.org/pts/d/raleigh-1989-mazda-b2600i-5spd-manual/7862640615.html

I wouldn't be against swapping in another stock truck engine, but the one in it has a bunch of miles on it, so it may not be worth a rebuild.........

 

[LDO]

https://theoegarage.shop/products/mazda-b-series-ls-swap-kit?srsltid=AfmBOor-mnCqfKIpkk3UNmeBBOpvOmDRDnzh6AHYJcFE0Vb8t7wbrbKy