I've talked to a few people about this. If my fd is completely stock would installing this system make it more efficient in any way? spark maybe? smoother idle?

 

I'm sure that if you put your car on the dyno you would see a difference on how the power was delivered.

I am also sure that with a completely stock FD your Butt dyno would not notice one bit.

Conclusion,
Money is spent better elsewhere.

 

^I've got to agree, sure you might notice small gains on power delivery and response....but it's not worth it.

 

WHat about lightly modded FD's with Downpipe and catback?

Would this be a good bridge mod when building up to a PFC and upping boost to 12 psi on the stock twins?

 

The stock ignition is very ample for stock power. If you are having ignition problems (i.e. high rpm breakup) at stock levels, HKS is not the solution.

 

The cheapest bang for the buck for the ignition system is Taylor sparkplug cables.

 

Sorry for straying off topic a little, but I was wondering how much of an improvement is this on a moderately modded FD (350ish rwhp)? Thanks in advance.

 

 

big difference when running 15psi. i gained 24 rwhp and 2mph in the traps by installing a twin power. Not to mention that my car was tuned again when i installed my twinpower...kan tuned to a lower afr that dave at kd did originally.

 

^Thanks that's really helpful to know. I'm only running 12 psi and will not be tuning it until I do my complete single setup, but hopefully it will give me some noticeable improvement.

 

it wont make much of a difference at 12psi. basically the twin power fixes high rpm break up that occurs when u run 15psi. it gives u back the ponies u are missign due to this breakup.

 

Are you sure? The twin power is gonna allow for a hotter spark which in turn is going to burn more fuel. Burning the extra fuel will automatically lean out the extremely rich stock A/F ratios (not sure how much) and give more power that you should be able to feel.

 

The stock setup is so restrictive that I seriously doubt any noticeable differences. Ignition breakup is the reason to get the twin power and at the stock levels there it should be non existent. Check dyno charts of stock set ups versus modded set ups and you will see what I mean.

 

I see..

 

I was running 13 psi without the twin power, and was getting massive ignition breakup. Once installed the breakup cleared up. When my car was on the dyno, the curve was shooting towards around 300+ whp, but once I hit 6500 rpm, it fell flat on its face and plateau'ed at 280 whp because of the high rpm missing. Once installed my power was better up top, but unfortunately, I was not at the dyno when I installed it. I'm certain that the twin power would have given me around 20 whp, by igniting all that unburnt fuel. I am not saying that the twin power will give you 20 hp, but in my case looking at the dynosheet, a 20hp gain looks coorect. People have seen anywhere from 5-10 increase using the TP. BTW, The shop was full of my rich black exhaust after the 3 runs..

As a rule of thumb, once stock boost levels are exceeded, the ignition should be upgraded.

 

BTW Montego, How are your lights coming?

 

i would get it if you plan on upgrading later, which we all eventually do.

 

Unless you plan on modding later on the TP isnt worth it on a stock FD. I have just about all the bolt-ons and put on my TP and felt it. It was alot smoother and could feel a lil more hp.

 

Whats a TP?

 

"twin power"

 

I have twin power on my near stock FD, all I have is catback exhaust and intake. and I noticed quite a bit difference in power. My once the second turbo kicked in after I got it installed, it was like "WOAH" wtf was that! Great investment even for a stock car imo!

 

my last fd, smic,m2 ecu,dp,hiflo cat,intake,cb,the tp made a good difference in power and i got 1 more mpg too.buy a used one and save a couple dollars.

 

Ive got the twin power on mine and it made a big difference on gas mileage. With what I saved on gas, it paid for itself in less than a year. It provide more power and smooth continuous power through the entire rpm range. Took care of ignition breakup as well.
chuck

 

What are your mods?

 

Just finished installing and took a test drive. The first thing I noticed is how much smoother it ran, then as I was backing out of my driveway. I noticed that the idle was better and when I left it was more responsive. On the street in boost it feels stronger, so BUY ONE! I have a link below of someone that's selling them CHEAPER then buying them used. I pretty much have all the bolt ons with the stock turbos- down pipe, ASP SMIC, 1300 secondary, Supra fuel pum, air pump removed, Power FC, High flow cat, PF cat back, and a mild port on the engine.

https://www.rx7club.com/showthread.php?t=558895