No need for return fuel system
 

As far as a return fuel system not needed, unless you want to go for max power with E85.
I have no need for that on my daily, but I do have the return fuel system since I bought it all used as a package deal. Thanks again Aaron. :-)

Or just contact soho and go with a ysi blower and stop wasting your money

If I remember correctly, the GTR of its first MY has already included a RFS, and it's only 480-hp output in engine on pumping gas... (today, any boosted Z can easily go over this number) I usually tell my friends that RFS has merits you barely see, often overlooked. It allows your boosted Z runs more reliably and "consistently" under WOT no matter what fuel your using. For FF, it's definitely a MUST in order to keep the pressure on the fuel rails truly regulated, thereby making each of the injectors outputs equally regardless of their position difference and increased fuel volume. From my experiences, the injector duty drops by almost 20 percentage after the RFS was added (gas). This significaly alleviates the loading of the fuel system. As a result, I see no reason that anyone choosing to go forced induction should not include a RFS for our car IMO. You may save some money for now but you may spend more in the future. Especially you can save lots of labor fee if you have it installed along with your charger kit. Installing all of them at the same time is much cheaper than installing them separately. :)

Considering the a2a kit can make over 500whp without even trying, a RFS is a no brainer.

OP - I was in a very similar situation - a 'minimal' boosted build... i.e. what is the most bang/buck that will also remain relatively reliable for a street-only car.

I ended up going with:
Turbo kit
Small pump upgrade (255lph but if I did it all over again I would do 340lph)
small injector upgrade (600cc but id I did it all over again I'd go bigger!)
Clutch/Flywheel (would only do the clutch if I did it again, flywheel too chatty on the street for me)
Ecutek tune from a KNOWN GOOD TUNER (this is the most important part of any build)

This netted me 520whp and has been reliable for 20k miles. If you do decide to go SC instead, keep in mind the level of 'safe power' (if you can call it that) at the wheels will go down since the SC itself will siphon off several ponies on its own.

Also - unless in Cali, don't buy the Stillen SC - It appears to be designed for CARB certification and definitely not for reliability or power. Topz kit is what the Stillen kit should have been.

If your looking for the best bang for buck kit ... the boosted performance kit is the way to go... 8500 bucks will get you 500+ easy with plenty of room to grow .. easy install easy Maintinance.... I had 2 nismos at the same time .. one supercharged and one turbo charged ...even tho the supercharged Z was a big improvement ...it still felt lacking compared to the turbo Z ... two different animals all together

Thanks for your input. I’ve already decided to go with Aaron’s Topgunz’ SC setup. I’ve read too many scare stories with Stillen’s stock set-up. I realize that most of the problems have been caused due to Stillens canned tune, but I’m not willing to take the chance with my wife behind the wheel. Just not worth it to me.

What I’m weighing out now is if I want to go e85 or stay with pump 93. I have no clue right now which is better for me.

I’m also on the fence with Z1. They did a great job with the simple mods they did for me, but I’m not sure I trust them 100%. Mostly because their labor “estimates” tend to be lowballed compared to actual invoice once done. I don’t feel I was overcharged, per se, but they certainly didn’t come anywhere near what they quoted me over the phone.

Maybe now if i’m a repeat “customer” I’ll get a break?

Anyway, this isn’t a knock on Z1. They did it perfectly, in the time frame they stated, they just charged a “little” ($800) more than our handshake agreement. :)

I gave this a lot of thought too... I’m not a big fan of turbo’s due to lag and the way a turbo is “on or off”. Not to mention overboost and blown motors.

Self install is out of the question. I’m done with that stuff. I’m old and tired and just want to drive ‘em, not wrench ‘em.

I feel the same way about boats. The best boat is your friends boat. :)

I stuck with 93 as the additional flow for E85 is going to add a fuel return to the build, so there is a step up in complexity for it. You will be rewarded with a lot more power though. Good choice in the Topz kit!

Are you handy? If so, maybe just have a go at the install yourself? Seems like a lot of people successfully self-install that kit. You'll save a nice chunk as well.

Stupid question... how the hell does corn oil get you more power than fossil fuel?

As far as being handy, I went to a vocational high school and had four years of auto mechanics. We weren’t called “technicians” back in the 70’s! :)

I worked for a Ford dealership from 1980 to 1983 and HATED every day of my life.

So, while handy, I refuse to change my own oil. :rofl2:

I DO know a couple of guys that like to wrench that I can probably pay off in beer though...

Higher octane, burns cooler. You can add a lot more timing without worrying about knock. Flex fuel ftw.

I had no idea flex fuel had more octane! I’ve never used it and always ***-summed it was 85 octane. Which leads me to stupid question #2...

Any problems with varnish? Do you need to add a stabilizer to the fuel?

I’m sorry for the stupid questions, I really don’t anything about it other than it’s cheap as s*** down here.

I believe e85 is 108 octane. Most pump e85 has a lower ethanol content though. My tuner (Seb) recommends running a tank of (in my case, 91) every once in a while to clean out the system. No additives otherwise.

And Seb is the man for that!
Specialty Z is the place. I did a remote tune and WOW!

Besides what others said about e85 and it being higher octane meaning more timing and/or compression, e85 isn’t actually as power dense as t-rex blood. But you also don’t need as much air for a complete mixture so you can also compensate with the amount of boost you dial. E85 is somewhat of an easy way to get more power. You will lose mpg though and depending on the price of gas vs e85, you will probably pay more and fill up more often.


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