I bet my battery is smaller than yours...

[BP_Festy]

Do you see it? Look close.

Yep, now I can put on the Protege intake tube. That also means I can put an air filter on too! ha ha ha

The battery is out of a jump pack. I made a tray out of aluminum and TIG'd it together. Turned out pretty good. The bad part is it's negative 5 right now and my car is running on E85 so it takes awhile to start. It will be fine when it's warmer out.

 

[mazdamn02]

Is that a motorcycle battery? LOL, its tiny!

I'd be interested to hear some more about your experience with E85, apparently its 110 octane or something crazy? I know there are some people out there getting some insane HP numbers with it.

 

[JustROLLIN]

Is that a motorcycle battery? LOL, its tiny!

I'd be interested to hear some more about your experience with E85, apparently its 110 octane or something crazy? I know there are some people out there getting some insane HP numbers with it.

Not to get off topic, but be careful calling it 110 octane. The fuel is a much higher octane rating, but you need much greater amounts of the fuel. So, higher flow pump, higher flow injectors, sometimes even a higher flow fuel rail.

As for the battery, good work. You see a lot of drag guys go to something like that for weight reduction. Just make sure you have enough CCA (Cold Cranking Amps) if you are gonna use it through winter/cold weather.

 

[dmention7]

Not to get off topic, but be careful calling it 110 octane. The fuel is a much higher octane rating, but you need much greater amounts of the fuel. So, higher flow pump, higher flow injectors, sometimes even a higher flow fuel rail.

Just to expand a bit...

Practically and technically speaking, octane rating is just describing the ability of the fuel to resist knock in a test engine.

But, ethanol has something like 2/3 of the energy content per volume that gasoline does. So, ethanol may have anti-knock properties equivalent to 110 gasoline, but you'd need the capability to flow (and ignite) about 50% more fuel than if you were actually running 110 gasoline.



On topic: That's a tiny-ass battery! Are those jump-packs rated for the kind of charge/discharge loads a normal car battery would see? Wonder how long it'll last under that kind of duty.

Also, I'm, just curious what made you opt for using a teeny battery as opposed to, say, relocating to the trunk or something. Weight, I'm guessing?

 

[JustROLLIN]

I would imagine cost is also a factor. Those small batteries, in addition to the size and weight savings, can be had for about 1/2-2/3 the price of a regular Interstate or Die Hard batter.

 

[mazdamn02]

Not to get off topic, but be careful calling it 110 octane. The fuel is a much higher octane rating, but you need much greater amounts of the fuel. So, higher flow pump, higher flow injectors, sometimes even a higher flow fuel rail.

Good info to know!

 

[mndsm]

Out of curiosity, what did you do to the engine to cope with e85? That stuff has always intrigued me.

Also, that is one wicked tiny battery. I love homebrew mods like that.

 

[upgtx]

He has much larger than stock injectors (220 vs. 160's I think) on it... That is all.

 

[mndsm]

Huh. Interesting stuff. Looks like it's going to be massive amounts of fun when it's together. Hope to see it some time.

 

[BP_Festy]

He has much larger than stock injectors (220 vs. 160's I think) on it... That is all.

250cc vs 180cc

If I really CONVERTED it I SHOULD upgrade the pump, which I'll be doing for the next motor, and replace the lines. In all honesty an optimized fuel map wouldn't be bad either.

 

[mndsm]

But at least in theory it runs.... good stuff.

 

[BP_Festy]

Yep. It runs well. As well as it did on gas that's for sure. I haven't been able to keep my foot off the throttle to get any gas mileage figures.

 

[Jesse MS3GT]

My civics battery is about the same size... I dont think its that small though