oh really no boost lag? i didnt know that and i found a apexi boost controller on the classifieds pretty cheap i thought you could turn it down with the wastegate or something?


and if there isnt a boost controller then how did they turn it up from stock to 17 psi?

If the injectors are hitting 80% idc on a t25 @ 15psi, then a 16g sure as hell is going to hit > 80% @ 15psi...run wastegate pressure until you upgrade the fuel system.

You're most Likely to hit fuel cut at 17psi on a evo 3. I hit it at 16 with a t-28 (a little smaller) so I wouldn't push it past 13-14 psi until you have a wideband to keep an eye on your a/f

well i plan on turning it down my plans to get to 17 is 650 injectors wally 255 fpr wideband o2 sensor setup and safc i think thats it so far

Just fallow the upgrade path and you shouldn't have any problems. Your plan has a good start but you'll need all the basics to max that setup out. Do you have a boost gauge? Stock gauge is very inaccurate

yes and i have a oil temp gauge but needs to be installed

You should be good as long as you're up to date on your maintinance and keep the boost low until you have all the parts you listed

I suggest going straight to link not the safc if you plan on modding further just buy it once and you won't spend money twice and its well worth it just a suggestion.

well i honestly wasnt planing on going past 300 hp would i still need link or?

1997eclipse rs said:

well i honestly wasnt planing on going past 300 hp would i still need link or?

Click to expand...

you say that now...wait 'till 300 comes

I said the same thing just wait till you feel what 24psi feels like then that's it now I'm going to be building a 700hp motor. Iit happens to all of us link is still my best suggestion it'll help monitor everything and really get the most out of your setup trust me I wish link was the 1st thing I bought

For a 2g I would suggest flashable ecu.

With a evo 3 16g at 15-16psi I was seeing high 90% IDC's (injector duty cycles) and when i went to a 20g at 14psi I was seeing 112% idc by 7500 rpm. This was all with stock 2g 450cc injectors... I would recommend 14-15psi with your 16g, especially if you have no supporting fuel and intercooler mods

i probably will get link since everyone is saying since you make it there its addicting im spending a shit ton just to get this car runnning so i can have a boosted car

So I have a 1g awd talon with intake, exhaust, 20g, rewired walbro 255, and soon I'll have some 550cc injectors. I was just wondering how much boost can I safely run with those injectors?

Until it blows

I would log it, run as high as I can without knock.

I havent gotten to the point of installing my similar setup, but when I asked the same question a well known fellow tuner suggested no more than 18psi. Without all of the proper mods I wasnt planning on doing more than doing 15psi, until i could get everything else upgraded. You know youre going to "hear" that youll need a wideband and tuning device if you dont already have it.

What are you tuning with?

Yea I'll be getting link in a month or so, I was just wondering what I can do now.

I'm sure you can find a sizing calculator either on this site or from what brand injectors you own that would tell you the lbs of air per minute your injectors will support.
You can also look up the air flow capabilities of the 20g turbo to get a better idea.

http://www.dsmtuners.com/forums/articles-tuning-ecu/366003-injector-fuel-pump-supported-airflow.html
and for E85
http://www.dsmtuners.com/forums/articles-tuning-ecu/253452-e85-injector-max-lb-min-calculations.html

There may also be a couple threads on 20g turbos and set ups to run them.

I wouldnt go above 16

Tuning is better safe than sorry....

You won't be able to install the injectors until you have the tuning solution anyways. I'd keep it at wastegate level until you're ready to start logging and tuning. The amount of boost you run is setup and tune dependent. Without a tuning solution you will be running a stock 1g timing map which is actually quite aggressive, add a significant increase in boost to that and you will run into knock and potentially a blown engine. Take your time, do it right, reap the benefits!

my dreamt dsm said:

Until it blows

Click to expand...

Id go with this answer, .

Your gonna outflow those stock 450's relatively easy with a 20G, I would NOT go over 16-17psi.. Even there you'll be probably be near 100% IDC.