High elevation and s16G

[Rock2610d]

So I have been doing a lot of reading and getting more and more confused. My Talon is basically stock. I do have 9:1 compression to help with elevation issues. My elevation is 6200 to 7500 ft or so. I have both a 14b and a s16G, in addition to my T-25.

Will a s16g work better than a 14b to compensate for altitude? Due to thin air up here, is a fuel pump upgrade really needed to run a s16G?

Typically a 200 hp motor would only have 170 to 180 up here.

 

[ErikTande]

Good question. Do you have a wideband? That will let you know right away if you're running lean or not.

 

[Rock2610d]

Nope no wideband. I need one but will have to sell 2 of the 3 turbos to pay for link and wideband. So I know the T-25 is lacking even at lower elevations, cannot imagine how inefficient it is up here.

I was hoping a 14b would be enough, but the more I read the less confident I am with it at 7000+ ft of elevation.

Since O2 levels up here are much less, can i assume the stock pump will work....it's out put is not affected by altitude?

 

[ErikTande]

I guess it depends on what your goals are. At the end of the day the small 16g will give you the most power, and you can limit the boost with a boost controller so fuel upgrades won't be necessary. Of course if you want to up the boost later, you can always add a bigger fuel pump and larger injectors.

I'd go with the small 16g. But first I'd install a wideband and get DSMLink. That's what I'm doing first as well.

 

[Tyeler18]

Is this cody?

When I was living in Laramie my s16g would max out my 450's around 13psi (100% IDC), now here at 1600FT I can hit about 15psi at 100% IDC.

Yes a Fuel pump upgrade is necessary though. The difference isn't significant enough to not warrant upgrading.

 

[1qkfwd]

7000' up but do you happen to know what the DA is there?

 

[Rock2610d]

I live close to the summit between Cheyenne and larimie. Summit is 8200' I think.

I do not know what DA means let alone what it is, sorry.

Seems odd that less boost up high will max out injectors. But that is why I asked the question. Real world info! I do not want to max out my injectors or pump.

I guess I should put my 14B on instead?

 

[LandSpeed-DSM]

You want more compressor, or at least one that can move more air, more efficiently at higher shaft speeds. To make the same boost in the manifold, a higher PR (greater shaftspeed) is required at altitude.

Long story, short the S16G is what you want. A rewire and 190LPH pump would be adviseable.

If your old pump is on factory wiring, pump flow may be down. This would require more duty cycle to get the same amount in the cylinder.

 

[Rock2610d]

Ok, a 190 fuel pump, and a rewire. I have owned this car for 18 years and never had to put in a fuel pump. Guess its time for a new one.

I hate cutting and hacking my electrical system. Would a 255 lph be ok without rewire, and no aftermarket fpr?

I will get a new OEM fpr too.

 

[LandSpeed-DSM]

It's a hit and miss for some, and I have a theory on that from observation and my own experience.. I'm of the opinion that if you run a 255, wired correctly, it will over-run your OE FPR.

 

[Rock2610d]

Guess I will try to get a EVO9 Fuel pump. It should work with out an aftermarket FPR and be just big enough that I hope not to have to alter original wiring.

 

[LandSpeed-DSM]

You should still rewire, whether you run an evo pump or anything else. 20 year old, thin wiring is not doing you any favors. It is easy and affordable.

 

[Rock2610d]

Ok...Got a used EVO 9 fuel pump for $40. Will install this weekend along with my Small 16G. I will test the waters without a fuel pump rewire. If after I sell the left over s16G, 14B, and T25 turbos and get a Link I will be able to tell if there are issues.

I will run the vacuum line directly to turbo actuator, bypassing the boost solenoid for now, so it will not boost too high.

Thanks for all the help....