Fuel System Set Up Help

[xrobbx03]

I am looking to upgrade my fuel system in my 97gst. My main goal is in the 300whp.

Right now I have some minor mods which are intake, UICP, Supra Intercooler, Apex N1 exhaust and downpipe, ported exhaust manifold, upgraded plugs and wires.

I am planning on upgrading my turbo in the future but i want to do my fuel system first. The turbo I am going to go with is a Big 16G. I also was going to go with a front mount intercooler.

Would this setup work for the 16G.
Walbro 190lph with no AFPR
550cc injectors

Then I was going to run a SAFC to control the system. Could I accomplish my goal with all of this? Would I be fine running no AFPR and the 190lp or should i do the 250 with a AFPR.

 

[magnet8289]

What you are looking at getting is the most basic set up for the 16g. Your 300whp goal is easily accomplished in these cars with the right supporting mods and the right tuning. The 190lph fuel pump will not overrun the 550cc fuel injectors so you don't need an AFPR. The SAFC would be a great controller choice for this set up as they are recommended for 550cc injectors. Extremepsi.com has a great fuel management kit on sale right now that includes a Walbro fuel pump, fuel injectors, and an Apexi AFC Neo. I'm not trying to advertise for them but it is a pretty good deal. You'll also want to invest in a boost controller.

 

[delta448]

My main goal is in the 300whp.
...
Walbro 190lph with no AFPR
550cc injectors

Then I was going to run a SAFC to control the system. Could I accomplish my goal with all of this? Would I be fine running no AFPR and the 150lp or should i do the 250 with a AFPR.

You should be fine with that setup for your goal of 300.

The 190lph fuel pump will not overrun the 550cc fuel injectors so you don't need an AFPR.

Technically, the problem is with the stock FPR, not the injectors. The Stock FPR is usually able to divert enough fuel back to the tank to handle the flow of a 190lph, but you should not assume anything when it comes to fuel. The 190 pump is said to be enough for up to 400whp according to FP.

You'll also want to invest in a boost controller.

Agreed, and a good MBC will be sufficient.

 

[magnet8289]

Technically, the problem is with the stock FPR, not the injectors. The Stock FPR is usually able to divert enough fuel back to the tank to handle the flow of a 190lph, but you should not assume anything when it comes to fuel. The 190 pump is said to be enough for up to 400whp according to FP.

Sorry about that, I switched around what I wanted to say.

 

[xrobbx03]

i dont know if i like the sound of "usually". Would it be better to get the walbro 255lph and a AFPR.

If I do go with the 255 what would i run for fuel pressure with the 550cc injectors.

 

[turbosax2]

While the 190 is sufficient for your current hp goals, the 255 will be able to supply enough fuel for just about anything you throw at it (plus they both cost about the same). Upgrade once and do it right the first time. Having an aftermarket afpr is definitely going to be safer and more reliable than the stock fpr.

 

[gob4sho89]

Since I wanted to have a very reliable 300-320hp system that I can beat on and get more out of later, I decided to go with;
walbro 255lph
aeromotive fpr
AEM fuel rail(stock was cracked)
ss braided feed and return lines.
FIC 650cc injectors
I think it is better to not run things at their max. That is why I went overkill on my fuel system. Also leaves room for growth in the future.
You should be good to go with your setup as long as you dont expect more than 300ish out of it in the futrue.

 

[magnet8289]

Here is a good article from Road Race Engineering about fuel questions. ===
http://www.roadraceengineering.com/eclfuel.htm

 

[xrobbx03]

Its an everyday driver so I wouldnt go crazy with it. I want to have fun on the street while still being able to bring it to the track every once and awhile.

 

[delta448]

I suggest setting fuel pressure at 43psi, that is the standard used for most injectors when flow testing and also the stock 2G pressure. Having a AFPR has other benefits too, such as tunability when using a keydiver chip, and stretching the output a little further on injectors that are nearly maxed out.

 

[xrobbx03]

If i go with the 255lph pump will the 550s be ok our should I step it up to the 650s

 

[magnet8289]

The 650's would give you more room to play with and also easier upgrading ability if you chose to do so later down the road, but you could use the 550's if you wanted.

 

[JayRolla]

550's would be fine for your goal and easier to tune with the safc.

 

[xrobbx03]

For the controller I was thinking of running the Apexi AFC Neo now instead of the SAFC. Are the 550s still easier to tune with that controller?

 

[Eastwood95]

Yeah, its the same controller, just newer with a color screen.......

Make sure you get a datalogger and/or a wideband setup to go with the AFC.

 

[xrobbx03]

Yeah, its the same controller, just newer with a color screen.......

Make sure you get a datalogger and/or a wideband setup to go with the AFC.

Upgrading my fuel system is gonna make me broke. What do you suggest for a good affordable datalogger, I know widebands can get pricey.

 

[srtkiller]

I am currently using the Apexi AFC NEO with 550cc injectors with the walbro 255 pump and I have had no issues with the set up and I am very happy with it. I would also recomend purchasing a windband or some sort of data logger to help with the tuning.

 

[xrobbx03]

I am currently using the Apexi AFC NEO with 550cc injectors with the walbro 255 pump and I have had no issues with the set up and I am very happy with it. I would also recomend purchasing a windband or some sort of data logger to help with the tuning.

Yeah I think that is what I have decided to do. I think will also run an AFPR.

What would be the best brands for 550cc injectors?

 

[90laserRSfwd]

I'm not so sure if they're is a "best" injector when only stepping up to 550's. Most use FIC's I would say. Personally I buy RC injectors that are garrentied to be matched sets. Just my 2 cents though. Keep us updated with your progress

 

[Eastwood95]

FIC (Fuel Injector Clinic) 550's are good. You can also try to get EVO 8 560cc injectors and/or EVO 8 fuel pump(same as 190lph) Usually much cheaper, just gotta find someone selling them. IE ebay/evotuners.net

I know you said you want to be extra safe with your setup, but that's going to cost some extra money.

Many people have made 300hp safely on the 190lph/550cc/B16g setup with no AFPR. If you just did that, and found EVO inj's/pump it would cut the cost down quite a bit. You would easily be able to run 16-18psi on that setup safely. Just do a little bit of research and think about it.

As far as dataloggers go, I got mine from OBDLoggers. It was $150 and came with everything you need and works like a charm.

http://www.obdloggers.com/mitsubishi.htm
It looks like they are out of stock on the regular 2G loggers, or they quit selling them. They do offer the DUAL LOGGER in it's place, check it out for $140....


This site has some ok deals on fuel setup's
www.extremepsi.com


AFC NEO overstock sale........
http://www.extremepsi.com/store/customer/product.php?productid=19029&cat=946&page=1

The AEM UEGO Wideband setup is only $285........
http://www.extremepsi.com/store/customer/product.php?productid=17967&cat=746&page=1

 

[xrobbx03]

I have decided to go with Extremepsi.com Fuel Management Kit with:
Precision 550cc Injectors
Walbro 255lph
Apexi AFC Neo

I also am going to go with an Aeromotive FPR


I havent decided on which wideband yet and I am also going to pick up an EGT gauge

 

[cooldude919]

Hi,
Quick newbie question. Cant DSMLINK do everything that the afc neo can, along with logging and whatever else? If the neo is around $300 why not spend $200 more for dsmlink since it can do so much more? Or am i missing something here.

 

[delta448]

DSMLink requires an eprom ecu, which being a 97 he does not have. That makes the cost more than double the SAFC, especially if you can find a used SAFC 2 for cheap. The SAFC Neo is not any better for DSMs than the SAFC2.

If you are only shooting for about 300whp, you don't really need the end-all be-all features list of DSMLink and can get away with spending less money, especially if you can find a logger for cheap. However DSMLink is much better overall, and would be a better route if you have an eprom ecu or don't mind the extra costs. It almost always boils down to how tight your budget is.

 

[cooldude919]

Thanks for the info, i didnt think about the added cost of a eprom ecu(pretty sure i should have one since i have a 95, havent double checked though). Going to be doing a 14b swap, with fuel mods a bit down the road. Trying to decide if i should just buy dsm link, or get a safc/logger/ect.