14B Question?

[OverBoostinGST]

Can my 450s cover the maximum efficent boost on a 14b with a 190LPH fuel pump? What boost level does the turbo stop being efficent? Im trying to shoot for 300WHP. My mods are in my profile and I plan on getting my evo3 manifold and o2 elimnator downpipe thats going to have a side exit exhaust with no cat. Any comment would help greatly. Thanks

 

[DSM4me44]

Im not 100% sure but i thought it was 21psi max. You can run up to 17psi with a 190 pump and then i think you have to have a pump and injectors to run 17 to 21 psi.

 

[CanadianTSi]

No they won't.

A 14b can run up into the mid 20's as far as boost goes.

 

[OverBoostinGST]

No they won't.

A 14b can run up into the mid 20's as far as boost goes.

So I just need a 190lph without any bigger injectors to run more than 17+ PSI?

 

[tranceman]

So I just need a 190lph without any bigger injectors to run more than 17+ PSI?

On my 14B setup I am running 17lbs of boost and my stockers are completely maxed out. If you plan on staying with the 14B get yourself a set of 550s and either a Chipped ECU or an SAFC to control your fuel and you should be fine.

 

[OverBoostinGST]

On my 14B setup I am running 17lbs of boost and my stockers are completely maxed out. If you plan on staying with the 14B get yourself a set of 550s and either a Chipped ECU or an SAFC to control your fuel and you should be fine.

Thanks for the info!

 

[CanadianTSi]

Sorry I meant no as in the injectors won't be able to handle that much boost.

 

[OverBoostinGST]

Sorry I meant no as in the injectors won't be able to handle that much boost.

Damn, would 550's and all that mentioned above be enough for what im shooting for? Im also planning on getting it tuned with an safc2.

 

[tranceman]

Damn, would 550's and all that mentioned above be enough for what im shooting for? Im also planning on getting it tuned with an safc2.

He was talking about the turbo being capable of running mid 20s in terms of boost. 550s are plenty for a 14B maxed out.

 

[fourreGsixty3]

He was saying that the 14B can do mid 20s for boosting levels, but the stock injectors can't handle it, I would say 550s, S-AFC or a chipped ECU from Jeff, and that 190 should handle 19psi, but really I would get a logger, and go as high as you can until your see knock, then turn it down 1-2psi so the knock level is below 2 counts. Try looking into meth injection, it will allow you to up the boost, and get lower intake temps, with no knock.

Dustin

 

[Lindeberg]

Im running 20psi on my ported 14b on 450cc injectors. They're currently running at 87% and thats tuned with DSMlink.

 

[Caithness]

They should be able to handle a maxxed out 14b, on pump and on race, if you don't run it too far on the rich side. If you want extra head room find a non-turbo 1g fpr which raises the base pressure to 47.6 psi and ups the flow from around 415cc/min to 475cc/min. We ran my friend's Evo 3 16g at 21 psi on stock injectors like that, around 11.2:1 afr and around 90 percent duty cycle. I think if you up the pressure, run more towards 11.5:1 afr, and don't mind low 90 percent duty cycles (95 percent is as far as I personally will take them) you could push over 300whp on the stock injectors on pump gas. No 14b will reach that number on straight pump.

 

[nightspeed87]

They should be able to handle a maxxed out 14b, on pump and on race, if you don't run it too far on the rich side. If you want extra head room find a non-turbo 1g fpr which raises the base pressure to 47.6 psi and ups the flow from around 415cc/min to 475cc/min. We ran my friend's Evo 3 16g at 21 psi on stock injectors like that, around 11.2:1 afr and around 90 percent duty cycle. I think if you up the pressure, run more towards 11.5:1 afr, and don't mind low 90 percent duty cycles (95 percent is as far as I personally will take them) you could push over 300whp on the stock injectors on pump gas. No 14b will reach that number on straight pump.

This is true...

Damn, would 550's and all that mentioned above be enough for what im shooting for? Im also planning on getting it tuned with an safc2.

I think a 190 can handle what a 14b has to offer ( supposing you dont take it past the 21lbs efficiency point ) but why stop at 550s.. Id say get your ecu chipped and get some 720s or bigger because the chip will compensate. Besides you never know your goals in the future so you might as well do it right once huh.

 

[RedTurboEclipse]

Im running 20psi on my ported 14b on 450cc injectors. They're currently running at 87% and thats tuned with DSMlink.

Is this stock fuel pump as well? Also what is the AFR reading on dsmlink, or if you have a wideband reading that would be better.

So some say I could get away with stock fuel pump and injectors? Someone mentioned the 1g fpr to increase fuel pressure. This is similar to getting the B&M FPR mod right? It only increases FP. I did this with my old big16g setup on my other GSX, stock injectors with walboro 190.

I'm not planning to go crazy or aim for fast times with this car, just something a bit more fun to drive as this is my daily. I have my 50 trim gsx for the other stuff. So it would be ok to run stock 450s, stock fp, on a 14b at 15 psi?

 

[fourreGsixty3]

Someone mentioned the 1g fpr to increase fuel pressure. This is similar to getting the B&M FPR mod right? It only increases FP

The 1G FPR off a n/t is what they were refering to, it has a stock FP of 47.6psi, yes they are essentially the same, by only increasing FP, and they can both be over run, and not provide a 1:1 ratio rise.

Dustin

 

[Caithness]

I don't think I'd try pushing the stock fuel pump on a 1g. I don't know much about 2gs- if their stock fuel pump is better, maybe I'd try it. I'd rather just buy a 255hp or Supra pump and not worry about it. When you're running 20 pounds of boost AND bumping the base pressure to almost 50 psi you're putting any pump into a range where it flows less volume, and the stocker just can't flow enough.

I had problems with overrun with my stock FPR and the rewired 255hp. Those problems went away with the NT FPR. I haven't cut one apart to check, but it is my assumption that the return hole is the same size as the return hole in the turbo FPR. I did some reading and most people who had overrun on the turbo FPR had overrun to pressures no higher than 46-48 psi max, most in the low 40 psi range. It is my theory and observation that the NT FPR pushes the base pressure high enough that the flow limitation of the return hole is overcome and it can keep a stabile base pressure with steady 1:1 rise from there in boost.

 

[Lindeberg]

Is this stock fuel pump as well? Also what is the AFR reading on dsmlink, or if you have a wideband reading that would be better.

The fuel pump is a Walbro 255hp and my reading with dsmlink is 11.8:1. I ran a 13.6 at 107 with a passenger, subs and 18inch chromes...