BigJim

So i have the 450R fuel kit from A-Spec. It was the Secondary Rail, the primary injectors and 2 stainless steel braid fuel lines with -6 AN fittings.

I decided i want to go parallel instead of series so i bought some AN fittings and some hose and went to town.

Notes:

I need to change out the fittings in the primary rail to the 45 degree fittings, i have clearance issues with the straight ones.

I am running the awkward crossover of feed lines, instead of feeding both from the firewall side and leaving the front, because i am using some of the hoses from the Aspec kit.

Now let me know what you think and if you see any issues.

BigJim

forgot pics

XLR8

iTrader: (52)

Looks good...

Wondering why you didn't go from the rear of the secondary rail to the FPR? Either way would work, & it does depend where you are mounting your FPR.

Wish I would have went with all black & silver fittings & a black FPR..... The red & blue of my fittings & Aeromotive FPR clashes with my otherwise black & polished bay...

HardHitter

iTrader: (4)

Is there any benefits running parallel compared to series?

I am currently running series. I have my FEED line going into my secondary rail, then the secondary to the primary rail, and then primary rail into the FPR and then the bottom of the FPR to my RETURN line but currently having trouble getting fuel pressure above 30psi when trying to prime the car to start on a new engine.

BigJim

Parallel helps keep the pressure up for both rails. In series when the primaries kick in, the pressure for the secondaries, which are after the primaries usually, except in your case, drops because the primaries are taking the fuel. In Parallel the fuel consumption from the primaries has little to no effect on the fuel pressure of the secondaries

XLR8

iTrader: (52)

If you have an adequate fuel pump setup for your power goals, I see no benefit in parallel. I find that overbuilding your fuel system with key components is a good thing with rotaries.

If you are worried about dropping pressure based on how you have your lines setup, maybe it's time to upgrade your pump or pumps

BigJim

I have the Nippondenso Supra TT fuel pump. I think that should support what i have.

GT3574 Turbo
Large Streetport Motor
1600 cc secondaries, 550 cc primaries
Apexi PowerFX
High Flow Cat/Catback
M2 CAI

I am shooting for the 450 to 500 rwhp mark.

ALPSTA

iTrader: (3)

I will be buying an A-spec 450R kit however I am not sure what brand the FPR in A-spec kit is. All I know is this kit is similar to RX7store extreme fuel system:

http://www.rx7store.net/product_p/extremefuelfd.htm

Does the brand of the FPR make much difference? What brand FPR does A-spec 450R system come with?

I will be running a similar set-up to BigJim minus the streetport. 450R (non parrallel) will be sufficient right?

My set-up:
GT3574R
450R + Supra fuel pump
Power FC
Greddy SMIC
3" turbo-back (catless)

Also maybe I should get in touch with Sean about the colour of the fittings and FPR, I didn't know we had the option.......

BigJim

The FPR is from "Big End" products and does allow the removal of the Fuel Pulsation Dampener.

As for color of the fittings, i dont know if Sean gives you options. Mine came in black. I made all the other lines myself with pieces i purchased from the local Race shop.

ALPSTA

iTrader: (3)

RX7store's Aeromotive FPR comes with a FPR gauge, does A-spec kit come with one? Does Aeromotive allow the removal of fuel pulsation dampener also?

BigJim

Yes the A-Spec kit comes with a fuel pressure gauge. And from what i understand the Aeromotive has a built in FPD so you can remove it with that one as well.

ALPSTA

iTrader: (3)

Thanks BigJim. Let us know the end result once you finish installing and tuning the kit. Mine is still months away

RXtacy

iTrader: (7)

If you are talking about the Greddy SMIC thats roughly the same size as the stock one you might want to consider upgrading before going single. If not then keep an eye on your IAT and make sure they stay ok.

ALPSTA

iTrader: (3)

Greddy SMIC is thicker then stock. A friend was selling it so I got it and it's been sitting in my garage ever since. I know it's on the smaller side for a single turbo intercooler, but I'm considering methanol injection further down the track.

One thing I'm not sure about is that if Greddy SMIC will be a restriction or increase response, decrease lag and provide sufficient cooling.

Coming from a MR2, I know if you do it right a small intercooler will be fine.

Thanks for the warning though, I will be keeping an eye on IAT and have the car tuned by a pro.

BigJim, sorry for the threadjack.

XLR8

iTrader: (52)

Close to 500whp I would look into a dual pump setup, as well as AI.

HardHitter

iTrader: (4)

Would you also suggest larger injectors? From what I've heard, 850/1600 setups are at around 85-90% duty at 425-450ish.

I rather have overkill on the fuel setup, then to have that one time where it's not enough.

ALPSTA

iTrader: (3)

Similar to OPs set-up, I'm getting an A-spec GT3574R kit and I was recommended a 450R fuel kit, as you know it's a 550/1600 set-up and turbo delivers 400-450whp depending on supporting mods. So if 850/1600 is at 90% duty, what % 550/1600 be at I highly doubt Sean would sell a kit that'd be on the limit with no safety margin.

KKMpunkrock2011

iTrader: (5)

850/1600s should be nowhere near 90% IDC at 450 if everything is setup right and FP is 40-43.5 unless you're on e85, in which case you should bump fuel pressure a bit.
http://www.maxcooper.com/rx7/how-to/...tem/calcs.html