September 15, 2019, 04:27:57 PM

Author Topic: Boost Capacitor.  (Read 1143 times)

Offline freeskier7791

Boost Capacitor.
« on: February 14, 2018, 04:21:03 PM »
Cool little projects.  I like the CAP starter booster idea.  I need to pull my fuel tank to redo the pick up and am not looking forward to it.

Offline kinger

Re: Boost Capacitor.
« Reply #1 on: February 15, 2018, 10:46:02 AM »
I use the same cap pack on my snowmobile to help start it with a light weight lithium battery that can be a little weak in the cold.  Works great!  Went from a 13lb batt to 3.4 with the lithium and the cap pack. I bought my cap pack from Ebay where a guy mounts them in a 3D printed water proof case and has small capacitors as the balancing circuit.  Works mint. 

https://www.ebay.com/i/112204472039?chn=ps
93 Touring, 6.2L, T56 Magnum, Mamo RPS BC2 clutch, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Online Cobranut

Re: Boost Capacitor.
« Reply #2 on: February 15, 2018, 09:07:00 PM »
I use the same cap pack on my snowmobile to help start it with a light weight lithium battery that can be a little weak in the cold.  Works great!  Went from a 13lb batt to 3.4 with the lithium and the cap pack. I bought my cap pack from Ebay where a guy mounts them in a 3D printed water proof case and has small capacitors as the balancing circuit.  Works mint. 

https://www.ebay.com/i/112204472039?chn=ps

That's pretty cool.
He also makes a 12 cap unit, weighs 2 pounds.  https://www.ebay.com/itm/Boost-cap-module-12X-350-farad-caps-12V-600A-starting-current/112659886209?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D20160908110712%26meid%3Dc426e18263d4487196b2ef090f56f80f%26pid%3D100677%26rk%3D1%26rkt%3D26%26sd%3D112204472039%26itm%3D112659886209&_trksid=p2385738.c100677.m4598
I wonder if it could replace the battery in my race car?
Do you think it would reliably start a 12.5:1 compression 2.3 liter 4-banger, along with powering the ECU, fuel pump, and other electronics that need to run before startup?
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Online Cobranut

Re: Boost Capacitor.
« Reply #3 on: February 15, 2018, 09:07:43 PM »
Holy shit, that's a hell of a link.  LOL
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline kinger

Re: Boost Capacitor.
« Reply #4 on: February 15, 2018, 09:47:10 PM »
Yes they work well for starting engines that need a lot of amps. The down side is they have little reserve so if it doesnít start because of a issue youíll go dead soon. Itís best when paired with a lithium battery use a 1-2lb Shorai or equivalent and never worry about cranking power. Last downside is the UCs can leak a little charge so I put the charger on it like every few weeks to top off the battery. The UC charge in less then a minute. Itís pretty cool tech!


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93 Touring, 6.2L, T56 Magnum, Mamo RPS BC2 clutch, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Offline freeskier7791

Re: Boost Capacitor.
« Reply #5 on: February 16, 2018, 08:05:28 AM »
Those are pretty cool, David I bet you could put some leads on the car some where with an anderson plug so you could have a start box hooked up with the cap setup

Offline rk970

Re: Boost Capacitor.
« Reply #6 on: February 16, 2018, 05:27:43 PM »
Just put one of these in.


Six 350f 2.7v caps in series for 58.3f IIRC.  has the power to crank an engine over but little reserve (if the engine does not fire your screwed) works really really well when combined with a smaller battery.
I am putting this here because I do not want my build thread cluttered with a discussion about boost caps.

Online Cobranut

Re: Boost Capacitor.
« Reply #7 on: February 16, 2018, 06:38:31 PM »
Those are pretty cool, David I bet you could put some leads on the car some where with an anderson plug so you could have a start box hooked up with the cap setup

Good idea.
I have a few of those connectors left over from my communications days, and I was thinking of doing something like that.  I could easily mount one just inside the passenger window, on the rear deck.
I'd keep a battery plugged in in the paddock, and have someone pull the plug after I warm up the car.
That way, the cap pack would only have to handle warm restarts, and I could plug the battery back in to keep the fans running while cooling down back in the paddock.

Thanks,
David
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline rk970

Re: Boost Capacitor.
« Reply #8 on: February 16, 2018, 08:36:19 PM »

Eat my EleCtrons.. U nuts..

Online Cobranut

Re: Boost Capacitor.
« Reply #9 on: February 18, 2018, 10:32:58 AM »
I'm thinking of this for my race car, with an external connector to connect a battery when cold starting the car, and to run fans during cool down.

https://www.ebay.com/itm/Boost-cap-module-12X-350-farad-caps-12V-600A-starting-current/112659886209?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D20160908110712%26meid%3Dc426e18263d4487196b2ef090f56f80f%26pid%3D100677%26rk%3D1%26rkt%3D26%26sd%3D112204472039%26itm%3D112659886209&_trksid=p2385738.c100677.m4598

Do these have circuitry to limit the inrush current when you first connect them to the battery, and to limit the surge on your alternator when the engine first starts?

Also, do you think this would be able to crank a 12.5/1 2.3 liter race motor, that doesn't always start on the first crank?

Thanks,
David
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline freeskier7791

Re: Boost Capacitor.
« Reply #10 on: February 19, 2018, 10:30:33 PM »
I would think the voltage regulator on the alternator would protect it?

Youd wanna see if there is a pwm signal to ramp the voltage, Im thinking no

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Offline rk970

Re: Boost Capacitor.
« Reply #11 on: February 19, 2018, 10:50:26 PM »
idk...
I know the cs130 and 130d have a dozen or more regulators depending on application.. The one I used has a 10sec soft start then puts out 14.8v it will slowly drop to 13.8v as it warms up..   As long as you do not exceed the max voltage on the capacitor bank you cannot charge them to "fast" . I observed  a large current draw charging the caps if they are discharged (40amps the max my meter measures)..As the caps get toward system voltage the current draw goes way down.. (I would not hook them up with 14ga wire as it will smoke them)
It's like the first 90% of the charge is quick/hi amp the last 10% the amp draw really tapers off.
Also some alternator do not have a regulator in the traditional sense. These alternators have the field controlled by the ecm.

Online Cobranut

Re: Boost Capacitor.
« Reply #12 on: February 20, 2018, 09:20:04 PM »
Thanks guys.  I like the idea to use a small battery along with the cap pack.  That would allow the battery to recharge the caps between cranking bursts.
With a flywheel and ring gear that weighs under 2#, this thing is pretty finicky to start.  LOL
It'd really suck to spin, stall the motor and not be able to restart out on course.   :banghead:
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline rk970

Re: Boost Capacitor.
« Reply #13 on: February 21, 2018, 02:56:22 PM »
18A/Hr only weighs 12.8lbs, + 2lbs for the caps.. 
http://www.tempestbatteries.com/html/tr18-12.html.
And then use one of these 55a alternators.  One of the smallest oem alternators and you can spin them to uber rpm levels.
http://www.rockauto.com/en/catalog/suzuki,1987,samurai,1.3l+l4,1271135,electrical,alternator+/+generator,2412