HKS twin power vs. Jacobs ignition
 

Okay I am in need of an ignition system for my newly installed single turbo kit. I was initially going to buy an HKS twin power but came across a good deal on a Jacob's igition system. So my question is which of the two will you guys prefer and why? Thanks for any help.

Tony

It's funny you ask, actually.

I'm currently running the older style jacobs rotary pro pack with an fc leading coil. I have a new twin power with harness sitting in the box in case I decide to try that route.

Based on last weekend, when I was driving the car hard at 15 psi, the jacobs is more than up to the task. Running 9s all around with water injection on, as long as my AFRs were above 11.0 on boost the car pulled smoothly. Come to think of it, my peak EGTs never went above 1200ish, which is pretty damn low for that boost level.

The HK$ makes for an easier/cleaner install, but I've been running jacobs boxes for going on 6 years now and I've been pretty happy with them. I know Howard Coleman is a big advocate of them, and you know how much power he's putting down :)

THanks Rich...I think I have found my answer...

Any more suggestions???

I've been running the Twin Power @26lbs on pump and meth and have no breakup problems.

I think Ground Zero ran there 42r car w/ a HKS unit and made well over 600whp. I ran my to 23psi and no break up.

I am going for HKS TP...

The Twin Power was designed to run the stock coils.

Some Jacobs burn up stock coils, and that is why people run the FC coil with the Jacobs in a FD.

I searched and searched, honestly this is the most info I found on the HKS unit. I am wanting to build a HIGH horsepower FD. I am going to build a Half-bridge 45R, yes 45R. Would a twin power support up to 30 lbs with no break-up problems? Thanks guys, any and all input would be greatly apreciated!

Thanks in advance!

Ty

With some cold race plugs, maybe. The Jacobs has been proven to work at boost levels up to 40 psi, the 9 second rx7.com car ran three of them, one per coil :)

anyone running aftermarket coils? Not to get too far off subject but I'm going with two fireball hi-6's and two crane lx-92 coils and would love some feedback on how they work out on rx7s.

+2 HKS Twin Power... solved all my ignition break ups at 20 psi....

question, is the hks twin pack easy to install or is it a job for mechanic and is a retune needed after install?

get the specific harness and it's easy.

what Zac said..^

is retune needed once installed??

I personally would definately go with the HKS TP. After being around all the supras we work on making 700+ to our 1450whp dyno car and all utilizing HKS TP, theres no other choice.

installation of the hks tp was a breeze with the harness. :)

Really... I have been wondering about this.. Did you just splice into the harness and join 2 together? Did you test voltage before and after?

Paying a few extra $ to get the plug in harness by far outweighs splicing. As for a retune it does create a hotter spark which will cause you to run a bit leaner. I would adjust the maps a bit. G

When I datalog ignition breakup I find that the WB AFR readings jump around alot (rich and lean). Given this, I don't see how the map could be properly tuned to a target AFR with ignition breakup, in other words if you tuned it with ignition breakup how do you know if you are tuned to an AFR of 11 or say 11.4 until you fix the ignition and retest the AFR.

Well, i used the plug n play harness. I had got 3 brand new stock FD coils, series 7 issue. i believe the 2000 model.

The dwell times where increased:charge time to 3.88 ms and discharge to .88

Yes i was getting crazy AFRs and flame out of the cycle at RPM. reduced hall sensor clearance to 0.1cm. rpm pulled to red line, Beyond 13 psi i was getting ignition break up. With the TP, i got a clean pull to 9800rpm. boosting up to 20psi.:ylsuper: Now i used water injection, no issues. I did not check the voltage, actually i regret not checking that....

Yes, you cannot tune, and if your break up is as severe as i experienced, your AFRs are out. Solve your break up. oh yes and i found to help my cause where the denso iridiums 31 leading and 27 trailing..... no idea the heat range .. should be 9s.... but don't quote me on that.... European standards crap:o:

My bad.. I have been wondering if one could run 2 twin powers together for even more spark? Thats what I was thinking on the above post... Duh..

Also I have very little knowledge on this subject so it may be a dumb question.. Anyone know the anwser??

If it did work would you burn out the coils?

I'm running the HKS Twin Power with no problems at all.

I was wonder about this also. Good info here. thanks guys

signofinfinity.....9800 rpms?

sk8world, the HK$ twinpower acts as a double strike system on all three coils, it doesnt actually amp anything. Chris Ott over at rx7.com verified this with an oscilloscope. Running two wouldnt be of benefit from what I know.

Thanks Rich. Kinda what I thought but was wondering if it added any extra voltage. Sounds like it does not. I am going to keep the HKS unit. I ran it to 26psi this weekend and seemed fine.

hey Rich,

yep :D did the eccentric gear conversion..... high tensile toothed gears.... clearance e shaft and balanced rotating assembly.... it should be good up to 11000.... but i get the squeezy feeling... so i doubt i will rev 10000...

PS, i have seen it done on a stock motor.. 11500...

plus, the to4r is puny at 8800 and above... so its still pointless with my turbo....

gt42R with T6 is ideal..... but $$$$$$$$$$$$$$$$$$$$$$$$$$$hehe... later :D

Best

George

I've seen several HKS units go out due to heat. Although also susceptible, the Jacobs units seem to be a little more reliable.

I'm in the process of researching ignition break up solutions. I dynoed a month or so ago and couldn't build hp above 5500 rpm no matter how I tweaked the maps... Then I realized it's probably the ignition breaking up. Original coils, 10mm Magnacors and 9s all around on 14.5psi, the good news is it was at 389rwhp but the curve went down from 6-6800 (lifted cause there was no point). I have an aggressive KDR port and running a T-78.

This is a break-up problem right?

Is the problem the coils? If so, the HKS TP won't do anything, so do I have to replace coils as well? Thanks for the help.

I run both, i have twin power on the 93 and have no problems at all. I run two jacobs on my methonal motor and have no problems at all either. I would say you have problems of a diffrent nature.

"problems of a different nature." ??? Was that directed at me? Meaning it's not ignition??? I forgot to mention AFR was solid around 11.5 tapering to 11.0, but got wavy around the 5500 mark...

cant imagine it is the stock coils as Myself and others have run this setup with the HKS unit and made 500+on the dyno. However I am trying to figure some issues I started having above 22.5 psi with ignition. May have been my AFR were to rich (low 10s) and back to back pulls. Causing my plugs to fail?? I may just go the MSD route..

Im definitly no expert but timing and fuel are going to determine how well the ignition works. I just wanted to give you an opinion from some one who runs both, hks on 10.8 93 with stock coils, and pro 10 series ign. with ultra coils on methanol engine. If everything is ok they both work well, not a case of this ignnition wont work in this aplication. But when the tune was not right it all run like shit.

This past weekend I switched out my old school Jacobs amp and fc leading coil in favor of an almost new FD coil, new HKS twin power w/rotary harness, and a new oem ignition wiring harness. I also installed all new b10egv plugs.

I didn't get a chance to drive the car much, but I must say I'm impressed. throttle response seems improved, with more midrange power. Boost seems to build more quickly, and I get zero traction after 6k rpms in second gear. Of course, it's gotten colder here lately, which is affecting both the boost and traction issues. The car is definitely much smoother at lower rpms, I'm very happy with the unit thus far :icon_tup:

Im going to bring this one back from the dead. My 3rd gen is idling really rough, but when I pull the fuse to the Jocobs ignition it smooths the idle out does that meen my jacobs is going out?

I ran the twin power with my half bridge and pt76 on 26 psi and had no break up. Once installed the key thing is to make sure you have the unit properly grounded. We had some issue with the unit and found that grounding was so very important to it.

My FD had the TII coils for leading and the stock trailings installed when I bought it. When I got my Twin Power I didnt think about the harness being cut, so my new HKS harness was kinda useless.

Heres my question:

I now technically have 4 coils instead of the stock 3.

Do I just not connect the leading coils (TII) and connect just the two stock trailing coils...

or should I find another stock leading coil to run it with the full harness on the stock setup?

Would the stock coils be adequate with my HKS TP for a 70mm inducer BB turbo with a streetported motor, run by a microtech X4?

the HKS twin power will fire a 10.0 blend at 21psi on alcohol (E85) and 550rwhp.

Used to run the Jacobs unit but it has a rep for failing. And mine did actually fail. After I switched to the Twin Power I saw a 30-50 mile increase for a half tank of gas.

Hi and what about the AEM TWIN FIRE http://www.aempower.com/ViewCategory.aspx?CategoryID=78