14B on 2G fuel system

[Splitpi]

So I am looking to install a 14B turbo on my 2G. Currently I have the stock fuel setup (450 cc injectors, Stock pump and wiring, stock regulator) with DSMLink to control.

What is needed to ensure I don't have fuel cutout at ~14 psi?

1) Just rewire the fuel pump?
2) Just rewire the fuel pump and replace with a 190 lph?
3) Just rewire the fuel pump and replace with a 255 lph and a new regulator?
4) Just install new 550 cc injectors with the stock fuel pump and wiring?
5) Just install new 550 cc injectors with option 1 aswell?
6) Just install new 550 cc injectors with option 2 aswell?
7) Just install new 550 cc injectors with option 3 aswell?

I what basically to go as cheap as possible with as little work as possible. I am not looking for huge gains, just extra zip in the car. I am leaning towards either option 1 or 5. What is the bare minimum required to run a 14b turbo on a 2G @ ~14 psi?

 

[dave99gst]

Fuel cut will come from flowing to much Air , not from not having enough fuel-

 

[Splitpi]

Dave, I miss typed... I meant overrunning my injectors or not having a fuel system that can provide enough fuel @ ~14 psi.

I am asking because I do not know if the 2G stock setup can provide enough for a 14B @ ~14 psi or if it does provide enough and no further changes are required.

 

[faracon]

I have a 14b on a stock 2g fuel system running 13psi now, with dsmlink. I plan on turning up the boost tonight so I can let you know if I hit 14psi smoothly.

 

[Splitpi]

Let me know faracon. Also what is the duty cycle of the stock injectors at 13 psi? ~80% or higher?

 

[faracon]

I don't have my laptop on me. I'll post up before and after duty cycles for ya.

 

[Smokin80]

if you have a wideband lean your fuel curves out to 10.5 or so and see if it knocks at the boost you are at. If not try turning up the boost untill it does. Once it starts to knock pull timing just before the knock started(1 degree at a time) and see if it goes away. Keep upping the boost in this way untill you cant get more than about 14 or 15 degrees of timing in the top end. (THESE ARE JUST SUGGESTIONS. I TUNE THIS WAY AND IT WORKS WELL FOR ME BUT PLAY AROUND AND SEE WHAT WORKS FOR YOU) If you rewire your stock pump you should be able to push the 14b to the upper limits of its capabilities with 450's. I ran a small 16g with 450's and rewired pump to 17psi with no knock at 10.6:1 afr. A friend of mine got his 1g (2800lbs) well into the 12's on 450's and a 14b. (not easy to do and i havent seen a whole lot of people do it but it just shows that 450's are capable with that turbo)

hope this points you in the right direction
smokin80

 

[CanadianTSi]

Get a 190 for now and then later when you have the other supporting mods to turn up the boost get some bigger injectors.

 

[faracon]

I'm not going to be able to do pulls tonight, just got in from a long day. I looked at some old logs though and I was at 80% duty cycle at 13 psi with my base timing advanced several degrees. I haven't logged a full pull since I fixed it though.

I'll post up here when if I get a chance to do some pulls tomorrow night.

 

[GVR4592]

I would rewire the pump and just go for it. You have a good datalogger, start upping the boost and tuning. I tuned my brothers 1g fwd beater car to 17 psi on the stock fuel system. The only mods were Dsmlink, fp rewire, and a crushed bov.

 

[Smokin80]

I would rewire the pump and just go for it. You have a good datalogger, start upping the boost and tuning. I tuned my brothers 1g fwd beater car to 17 psi on the stock fuel system. The only mods were Dsmlink, fp rewire, and a crushed bov.

I 2nd that one. That is all i had to start with. and i made around 225awhp. not bad for 600 bucks in mods considering the stock car makes 210 at the flywheel

 

[faracon]

I agree with both of the posts above.

BTW, sorry no pulls tonight because it's pouring down rain here.

 

[paul s]

I'm at 89%(stock 450s) duty cycle on t25(wifes car) at 18psi dropping to 13 at redline in 4th with a rewired pump hard pipes and greddy BOV. dsmlink shows 10.7afr, I just did 98mph(1/4mlie) on that set up. I found that is I lean it out too much with the stock SMIC it will knock. here is the log.
http://www.dsmlink.com/forums/attachment.php?attachmentid=7467

 

[RedTurboEclipse]

For 2g owners with stock fuel system and a 14b. If you have a logger and are experimenting, please post up you results on what is safe to run. I plan on doing this. Stock everything else except a filter and bov.

 

[Splitpi]

Thanks for the input everyone. My concern is obviously with 450cc injectors you can only dump so much fuel into the engine irregardless of the fuel pump. But with just a rewire, I believe the fuel pump can fully satisfy the 450 cc injectors max flow. If I am wrong... please correct me. And I think that will put me at a decent state for ~14-15 psi on a 14B turbo.

 

[GVR4592]

At this point you just need to start experimenting. You have everything you need. You know what knock looks like on Dsmlink correct? Just start increasing the boost in small increments until you get to a reasonable number. Then, if there's no knock, start leaning it out in small increments. Do that until you get a small amount of knock, then richen it back up a couple % for a safety margin.