rob20rx7

iTrader: (1)

I actually picked up one of these on ebay a couple months back and finally got around to instaling it in my FD. One wierd thing was when i unpluged the wires were the harness pluged in the car still started whith it disconected. WTF is that. if this has something to control with the ignition, wouldnt the ignition not work when that plug is completely disconected? anyways i went ahead and left it all installed but was unable to really get on the car at all because of local rain showers on the way home. i will post tomorow if i did feel any diff.

rotorbrain

most everybody that has that ignition box has had a very nice success report to go along with it. it seems to work very well. . . just a tad bit pricey if you ask me.

paul

cruiser

Its next on my list of upgrades. And yes, its a bit pricey. But so is everything else for an FD.

David Hayes

iTrader: (6)

Search for numerous discussions on this product. For me, the unit actually lost 10 WHP. This was dyno tested by Pettit Racing about a year ago when my car was in the shop.

FlameThrowingRotary

my car ran better with it. especially up past 6 grand.

fd3virgin

i installed mine and i still have the high rpm breakup.....maybe it's too rich

saxyman990

HKS just recently announced a significant price reduction on this. RX7Store is selling it for $395 (which is a heck of a lot more reasonable than before), but you may be able to find it for cheaper if you search around.

matty

I CANT BELEIVE YOU LOST 10 RWHP. But u are one of the only guys to ever test the thing on a dyno. i am gonn have kd do the same come spring time.

jeremyb

That is true and I highly agree with it being alot more reasonable. With it's reputation, some people say they gained a smoother high rpm flow, some say they don't notice anything, some say they notice an improvement on accelertion, some say that they dyno tested and it shop up some HP gain numbers and some like David Hayes, notice a loss in power. I guess the mods in accordance to this install vary on its performance but IMHO I think that for the price it has now, this ignition upgrade is worth it.

Jeremy

RotorJoe

I don't have dyno numbers, but my car is tuned pretty rich. I see 10.5-11.0:1 fuel ratios under boost. The HKS cleared up my high end break up without me pulling fuel out. I figured I could have saved $500 bones (this was before they dropped there price and right before the AEM units started to fail) but I didn't want to pull fuel out. I figured it was safer richer. I also wanted to make sure my ignition setup was A OK. I have an FC coil and the Jacobs amp was just removed and handed to me as I bought my car. So I had a pretty good idea that I needed an amp. With the HKS amp installed it pulls hard and good all the way to redline. Although I don't have anything to compare it to.

cruiser

Ouch. This is what I didnt want to hear. High RPM breakup is the only thing I would get the HKS TP for. And throwing out $400 is a lot of money for something that doesnt help. Heck... for that I could sell my M2 ECU + that $400 and get a used PFC with commander. Problem would be tuning it though. Not a single person in the country can do it

jeremyb

My condolences....

Jeremy

DaiOni

can someone elaborate on "high rpm breakup"?

Tim Benton

iTrader: (1)

David'd not the only one to dyno it. I did and mine picked up 8 rwhp peak, and it basically shifted the rwhp up across the rpm range. Same with torque obviously.
At the time, Brian at M2 surmised that it must have helped burn the extra fuel he puts into the maps on his stage 3 ecu (that I had at the time).

I think it was hosted on another thread somewhere about the hks unit.

Tim

potatochobit

iTrader: (1)

high rpm breakup occurs at about 6k RPM

most people have felt it.

when you boost your car in say, 2nd or 3rd gear, u get a slight stutter for a second at 6k, u can feel the igntion break up, its not smooth as the usual rev.

jpandes

Cruiser,


Back when I was running the M2 ECU(that I sold you), I had started seeing high rpm break up and hesitation right after I installed a Supra Fuel pump. I guessed that the car was running too rich due to the stronger Fuel Pump(that was the only thing I changed). I ended up regrounding my car and installed an HKS Twin Power and the High Rpm break-up was solved. My car was more responsive in the lower rpms as well. I highly recommend it.


John

RotorJoe

My break up was much worse. The car had a wideband at the time and I would see AFRs go south of 10.5:1 and boom, car falls flat on its face around 5500 and up. It felt like and ignition cut and I could see/smell fuel out the exhaust. The car would run great at 10psi WOT, but 14 psi WOT would cause break up. If I stayed just out of WOT at 14 psi I could some times red line, but it had real slight break up. Also noticed that the AFRs changed from WOT to just above its acceleration curve (like in another thread, “Is stomping on the gas worth it”). The WOT AFRs were lower by about 0.5:1.

matty

good to hear. i will test too come april.

drc

I've had them both. On the dyno with the old Jacobs box It's not that I saw much of an increase but my curve was much smoother as could be felt when driving the car.

My Jacobs box stopped working along time ago after ahhmmm Pettit did a bunch work to my car:-) The car sat around along time in my garage after I blew it up, so maybe it died of old and age and abuse, anways Cam has always been anti any ignition box and I've never seen one on any of his cars. I guess in a perfect world where all cars are tuned perfect and the coils,plugs,wires are perfect there may not be a need for them.

My expereince with the twin pack has been similar to that of the Jacobs no breakup in ignition since I've installed it where before I'd get the occational breakup at the high rpms and boost. The car runs super smooth, at idle and under boost. Maybe I'm just masking another problem but whatever the end result is worth it as far as my concerned. My O2 #'s stay around high 11's. Also it gives you a little more head room to run normal gapped plugs and run larger gaps for whatever thats worth.