Factory Ignition? Hks Twin Power
 

so i have a street ported, single turbo 35r, 850 primaries, 1600 secondaries, and 18psi of boost. My question is.... How much will i benefit with the hks twin power ignition? is it really necessary or can i get away with my stock coils/ignition?.....


Thanks

I would go with the Twin Power.... it lets you get MUCH more out of the stock system... better safe than sorry, especially when safe means a better, more controlled, spark.

If you decide to get the HKS Twin Power (which I would suggest) you will save yourself a bunch of hassle by going ahead and getting the extra wiring harness too.

Interesting point Gordon; KDR told me that just about all the ignition set-ups (Jacobs/ HKS) were just band-aids.

I dont cut corners on my car , and have alot of faith in Daves advice . No issues for three years with my single w/ stock coils.

twin power is a no brainer in my opinion.

I was pleasantly surprised when I recently installed my twin power and junked my Jacobs amp. I wish I would have made the change a long time ago.

Gordon, you've got me thinking about picking up some MSD coils now......

On my last FD, I ran 10's on the stock reman, stock fuel lines, and the ignition was also stock with the exception of a turboII coil pack. Car ran fine up to 24lbs of boost. Just keep fresh plugs in the car and don't tune it pig rich. This is a band aid for tuners that dont know enough about tuning, to do it right! If your running some sort of AI, other than straight water, that will also foul your plugs a bit faster so keep that in mind too.

^^I dunno Ernie, I really noticed a lot of positives when I installed the HKS.

Idle quality was smoother, I had more torque all through the rev range, throttle response seemed better. Car just revved more cleanly, and was definitely more powerful. I feel it was money well spent at this level of mods.

I wasn't knocking the HKS unit. In fact they had a demo of it at Sema one year and it was quite amazing. 3 times more powerful as the stock unit. I was just from the school, if it ain't broke, don't fix it, lol..

But isn't that all subjective?

Has anybody got any dyno plots showing any kind of HP or torque gains back to back with a stock ignition?

And it's my understanding that the HKS is not a true amplifier or CDI but just a re-striker.
Is that correct?

Lots of good and bad memories there....:wallbash:

i actually made 20 more rwhp.....goodfellas was there. i am pretty sure that it was due to twin power as on my previous tune i made 340 with 11.2 afr then installed twinpower and had a new tune done which was 10.8ish that yielded 360rwhp.

and i think the subjective part is ok and a big factor. i noticed much better response and over all feel when i installed the twin power. its worth it on that alone.

The HKS IS a true CDI.

Whenever i was at Fugita Racing in japan, they had a twin power demo box setup that you could play with. You could see the spark plugs spark on a stock coil and then you could turn on the twin power. The difference is rediculous. Like Ernie said, it was literally 3 times the spark. I would definately just spend the money on a twin power.

But see, you did a retune before the second dyno test. That alone could be where all the gain came from. An extra 20 rwhp from just an ignition system would be a bit of a feat. IMHO.

And while I intend to get a Twin Power in the near future, it just gets frustating trying to tell fact from fiction with some of these systems. What with no hard data to back up their claims.

Another question, is it worth going to say, MSD Blaster coils with the Twin Power?

what coils are you running with the HKS?


are there any gains/safety to be gained from just changing the coils on the FD or are those only realized through the use of a CDI?

Also, i've heard some people mention running LS1 coils, but couldn't find anything on a search. Were they running them with CDI's? What's the advantage there?

+1. a lot of noticeable difference. no more exaust popping, and everything listed above..

Ls1 coils are supposed to be stronger and not overheat as quickly as stock fd coils. If anyones interested my friend has a dyno maybe I can set up a couple runs. Only problem is im running fc1000 on fc coils and dont know anyone with a hks. if you people are interested in dyno numbers lets set something up. no more debating lets get numbers.

I'm probably the only RX7 guy that did not see a gain from the HKS, but an actual loss in WHP. Prior to my 3 rotor conversionfest (new word for me:)), I had Pettit dyno my car before and after installing the Twin AMP. No other changes were made. The car made 10 HP LESS with the HKS. On the day we did this test, Pettit had several rotorhead engineers in the shop watching and they were pretty suprised by the results. Had stock coils on at the time. Promptly removed the unti and we had the 10 HP back. Sold the Twin Amp the next day (for more than I paid for it I might add) and never looked back.

I know many other factors could come into play here (bad electricals, coils, etc.) but this is the closest I've ever seen to doing a true test.

Maybe someone else has a before/after dyno testing the Twin Amp?

I dont think just by adding the twin power youll get more power I think that the capability with the twin power to ampliy ignition allows you to tune a little more aggresivly in order to make more power. So you may have had it tuned a specific way and by adding the twin power and not tuning it with it I could see how the twin power might hurt you previous tune by burning more fuel maybe causing a lean condition.

Chris

Yeah, I remember those threads. So at what point are you running zero split? Anything over idle?
Only under pressure?

i agree with you. the test wasnt ideal. however thats why in included my afr. as u can see my second tune was less agressive and still yielded more power.

believe me i wanted to do the test in a more efficient way but it was a group dyno day and noone wanted to play along.

anyways the hks twin power is def one of the fav mods on this forum. tests or no tests. so basically what i am saying is get the f;ing thing.

Hey Gordon! I didn't make myself very clear. The testing and dyno runs were done on my 13B setup, which was pretty stock at the time. Had a downpipe, ,midpipe and exhaust. Also had the Pettit Stage II ECU and a boost controller, but that's about it. The ignition system was completely stock.

Maybe the Pettit chip had something to do with the results. Bost was about stock (maybe 11 PSI) during the testing.