Can I squeeze any more power out of it?

[BlueChariot]

Monday, or within a week I'm going to pick up an '84 Mazda B2000 from my generous uncle. It's a great truck, but I looked up the engine specs and it could use a little more power.

The engine is the F/MA I4 with a 2bbl, stock power listed as 103hp and 123torque.

For the life of me I can't think of anything to do to it besides redoing the exhaust (which would include shelling out for custom fabbed header), a port/polish, and somehow ducting air into the carb to get cold/ram air. For the life of me I can't think of anything else to do and two of the ideas can be a bit pricey. I can't find a single performance oriented part for this engine, which is understandable.

Help?

 

[bilzy7]

great truck, different engine?

 

[bilzy7]

its only my opinion, i just dont believe in modding a 4 cyl... even Some v6's

 

[alwaysFlOoReD]

I know nothing about these motors. What about turbo?

Richard

 

[BlueChariot]

Turbo is too pricey for the near future. My goal for the near future is just to add some more pep to it.

And I believe every engine should have it's full potential brought out, bilzy.

 

[Rogue_Wulff]

Weber 2 bbl carb, and freer flowing exhaust does a decent job of making a 4cyl run it's best, without doing internal mods.

 

[BlueChariot]

About how much does that carb cost?

I wouldn't mind doing internal mods except no one makes anything aftermarket for this thing, at least not that I could find.

 

[Rogue_Wulff]

I don't know for sure what a weber runs these days. Last I knew they were in the $200 range new, but it's been several years since I messed with them.
They are quite popular for racing, so places like summet, jegs and others that cater to racers should have info on them.

 

[BlueChariot]

How much more power you reckon it'd net me? $200 bucks is alot to me these days lol.

 

[Rogue_Wulff]

The weber carb will really wake it up. Stock carbs are quite restrictive and undersized, for a reason.
The difference between most stock 4cyl carbs, and the weber, is like comparing an older small block chevy 2bbl with a 4bbl. There really *is* no comparison, the weber is in a leaque of it's own. Prolly why it's so popular with racing classes that use 4cyl engines.

 

[BlueChariot]

Ah. That's good to know, I'm really struglling to find ant real aftermakret parts I could upgrade that truck with so that's a big leap. How might it affect fuel economy?

I'm not familiar with buying carbs, or working on them. Would there be a specific model I'd get?

 

[Rogue_Wulff]

MPG will certainly suffer, if you drive it hard.

The weber carb is kinda like a holley. It comes with a standard baseplate, and some applications will require an adapter to fit the stock intake.
Back in about '82, I installed a weber on my 80 ford courier (mazda B2000 with ford badges) and it really perked it up big time. I also ran a custom dual exhaust using the factory twin outlet manifold. Between the 2, it was like a whole new truck. Then, much like now, there wasn't any other aftermarket products for that 2.0L Mazda engine, so the carb and exhaust was about all I could do to it, but I was well pleased with the results.

 

[BlueChariot]

It's good to hear from someone with first hand results.

I know how I drive it matters greatly, but if I drove the same way with the stock 2bbl as I would with the Weber, about what sort of drop could I see from the higher performance?

 

[Rogue_Wulff]

Driven in a reasonable manner, the MPG should be about the same, assuming the carb is properly tuned. I suffered a big hit in MPG for the first few weeks the carb was installed, cause I had a hard time keeping my (teenage) foot out of it.........
Once I learned to use moderation in the application of the skinny pedal, MPG returned to about the same as it had always been. Kinda hard to learn moderation when you're 19, like I was back then. I sold the truck 3 years after the speedo quit, and it quit at 138K. I bet the truck had well over 175K on it by the time I sold it. Gas was MUCH cheaper back then.......

 

[BlueChariot]

The better fuel economy is one thing I'm looking forward to. I think I'm just gonna run an appropriate single exhaust tho, to keep it simple and reduce cost.

Because I'm really wondering, what type of options did it have as standard? Were there any power steering/brakes, tilt wheel, anything like those types of features?