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. 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

 

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