HKS Twin Power Dyno Comparison
 

I do not know if this has been posted before, I know I have not posted any dyno comparison sheets on this subject. There have been many posts referencing high RPM ignition issues and the fix is to install an HKS Twin Power. I am not sure people know just how dramatic the addition actually is. Today I was dyno tuning a car in this oppressive 90F heat. Not only does it cure the ignition breakup, but is also adds torque and HP across the entire RPM range.

The car I was tuning had just basic mods; 93 R1 with intake, exhaust on stock twins and injectors with our Banzai Racing rebuilt engine with stock porting. Stock coils, stock wires all 9 NGKs

https://cimg8.ibsrv.net/gimg/www.rx7...9b3bc2dcfc.jpg

Below is a sheet showing back to back runs on our dyno, the boost is not raised yet the car picked up 15hp & 14 ft lb tq. There was no fuel corrections done between runs.

https://cimg0.ibsrv.net/gimg/www.rx7...6a6233d810.jpg

Its nice to know there are real countable gains with a hks twin power,
Thank you for sharing

It's way more than just a box with a blinky light!

My twin power was actually masking a weak leading coil... with twin power plugged in I could feel a slight hesitation as it misfired, without the twin power it fell right on its face above 5,000rpm. Had to totally unplug my trailing coils to isolate the bad leading coil.

After installing the HKS Twin Power and eliminating the high RPM issues, I was able to complete the tuning and got the car to 338rwhp/269tq @ 14.7psi. At this point the stock injectors were maxed out and the car really needs an IC upgrade.

https://cimg6.ibsrv.net/gimg/www.rx7...911c40c151.jpg

This is great info and nice to see a noticeable difference. Too bad you weren't able to compare stock vs twin power vs aem ign-a to see how much ign-a differs from the twin power on this setup.

Somebody else needs to show a side by side comparison to the AEM coils.

I couldnt really boost more than 16psi with my setup due to ignition break ups.. im currently close to 30 with the TP.

We have customers making well over 500rwhp with stock coils and the Twin Power, even on my 20B I have the 6 channel TP and 6 stock trailing coils

Banzai , you happen to notice the A/F differences between the runs? I'm sure the hotter spark changed the ratios some but curious how much?

One thing to also keep in mind, most people compare stock coils or stock coils + twin power to brand new ign-a coils. I am not sure how accurate this is of a test.

It would be interesting to compare new stock coils + twin power against new ign-a coils.

I had 96K miles on my old ignition coils and replaced them with new stock coils since they were old. I think I gained power across the rpm band just going with new stock coils. I run the twin power as well. I run water meth injection with stock NGK 9's all around.

Awesome info

Is a tune required if I install a HKS Twin power, with everything else being the same?

Any changes to fuel, air or ignition should at least have the AFR's verified, if a substantial change is noted then a tune is required. The car above was already at the shop for tuning, the first run the AFR's were stable but the ignition was not, installed the TP for the next run and the AFR's were still within acceptable range. Then proceeded with tuning the car.

Good thread, did not expect to see such a difference

Mine's on a similar milage. I'll be replacing my coils when I go single, but would like to see a back to back on my current setup with new coils vs old.

Guys do you know anyone that sells a used twin spark? i have ignition break up at high rpms lately and am looking for a used one. thanks

They show up on YJA all the time.

HKS ?????? TwinPower FD3S RX-7 ????? - ????!

thank you but i have never bought anything from yahoo auctions.
i do buy often from ebay though but there arent any used HKS there.

i thought maybe a member of these forums has one for sale. :nod:

The banner ad at the top of the page allows you to purchase the items. This company purchases the goods for you, ships them to their warehouse in Japan then forwards them to you.

I've used them numerous times. If you can live with the fees it's no big deal to order from YJA.

oh i didnt know that . let me check

Hmm, the ads different

this is the company

?Buyee? "Buyee" Japan Shopping Service | Buy from Yahoo! Buy from Japan!

There is also

rinky.com

both do the same thing

i just bought one through Buyee !! thanks.

????! - ??? - ?fd3s??????

Check out the amazing amount of stuff on there, then resist spending more money lol

Used electronics are a high risk gamble, there are countless stories of people buying fried PFCs on this forum alone.

Been running a used Twin Power for 2 years bought from YJA. Yous pays your money yous takes your chances.

I always buy everything on my credit card and pay with paypal. Buyer protections FTW.

To each their own, I do not buy used parts, period. Been burned too many times, does not matter if you use Paypal and a CC, the frustration of not having a part delivered for weeks or months, then filing all the claims is not worth the hassle.

For every anecdotal story of success, there is one of someone getting screwed over.

When it comes to electronics I agree but I thought the FD3s twin power was discontinued?

Never been discontinued, there was a period maybe 4-5 years ago that they were on backorder for a year. We have them in stock.

I just saw that you have them in stock. Originally I was looking under "electronics" and missed them. You'll be seeing an order from me in the very near future.

Thanks!

Agreed, buying used electronics is a gamble, plus, lets support the vendors who are supporting and giving so much back to the community.

Yo, cool thread. Im following your other thread as well, the one where youre adding on parts. Performance wise, whats the difference between the Twin Power and the MSD 6al, besides the fact that you can connect to all coils with the Twin Power?

We just don't bother to install the MSD, it is too big and you need 3 of them. Can't tell you how they compare performance-wise. The HKS twin power is a 15 minute plug and play install and has a very small footprint and amplifies all the coils.

We even install them in FC's, 5 wires and all three coils are amplified.

Yeah i understand about the size and ease of installation. Those dont matter to me, and the amplification of the trailing coil shouldnt have too big of an affect, i think. What matters to me is price, and if they both do the same thing, but one is half the price... Just wondering, not trying to shit on your thread or anything.

It's okay. We used to install the 6A on the leading coil of the FC, but there is a lot more available space. Sounds like you have already talked yourself into it. I say try it and let everyone know how it works out for you.

I can't tell you how many poorly installed Crane HI-6 amplifiers I have removed from FD's.

Yep. Thanks for your input.

I am curious what exactly the twin power does, since the description says it is a combination of inductive and CDI.

would anybody be willing to let me blorrow a twin power to test?

I can do some back to back tests with an o'scope like i did in this thread:


https://www.rx7club.com/naturally-as...hread-1035364/

i have a msd 6a i can compare it to as well

+1 on this.

found this thread:

http://www.mr2oc.com/61-3sgte-turbo/...t-results.html

so.. you guys still have them in stock ?

HKS discontinued all twin powers

So, could one have a weak coil and not knowing it because of running the Twin Power? Is that an issue, or is it ok since the TP "cures" the problem?

Wow!

Good thing I got one when I did.

Are they coming out with a new product that's superior to the Twin Power or
no?

Not that I am aware of at this time.