24 Lb Injectors

[NIKwoaC]

No offense, but I suggest you change professions with that kind of advice. There are hundreds if not thousands of guys running 19's and around 300 hp. 24's can easily support 325...

Jrichker posted this several times


Injector HP ratings: divide flow rating by.5 and multiply the result by the number of injectors. This uses a 100% duty cycle. These ratings are for naturally aspirated engines.

Example:
19/.5 = 38, 38 x 8 = 304 HP
24/.5 = 48, 48 x 8 = 384 HP
30/.5 = 60, 60 x 8 = 480 HP

The preferred duty cycle is about 85% maximum, so for a safety factor multiply the final figure times .85.

304 HP x .85 = 258 HP
385 HP x .85 = 326 HP
480 HP x .85 = 408 HP

Remember that the above ratings are at 39 PSI. Increasing the pressure will effectively increase the flow rating. Example: a 19 lb injector will flow 24 lbs at 63 PSI, and a 24 lb injector will flow 30 lbs at 63 PSI.

See http://users.erols.com/srweiss/ to get the calculators used in these examples.

If you don't know who he is, Decipha is a damn tuning wizard. There are ways to cheat undersized injectors, and people do it every day, but there are a lot of corners that people cut with these cars across the board.

Plus I think Decipha is talking rear wheel and you're talking crank.

 

[NIKwoaC]

Also, my $.02: anyone with non-stock heads should consider a wideband O2 sensor and gauge. They are kind of expensive, but without it, you're just guessing.

 

[f8tlfiveo]

Decipha is a damn tuning wizard.

Yeah, I have first hand experience, he tuned my last car. And as soon as I get my ass in gear he is gonna do my car again. Do your research before making assumptions.

 

[mikestang63]

If you don't know who he is, Decipha is a damn tuning wizard. There are ways to cheat undersized injectors, and people do it every day, but there are a lot of corners that people cut with these cars across the board.

Plus I think Decipha is talking rear wheel and you're talking crank.

If he's talking RWHP then yes, he is correct. Appreciate the clarification and again, no offense was being made and no assumptions either.

 

[JD1964]

If you find you are leaning out WOT you can cheat and dial the pressure up.

With regard to leaning out at WOT, are there symptoms that a driver would notice and if so, what would they be?

Otherwise, how would you determine of you are leaning out at WOT?

 

[stykthyn]

Popping and pinging at wot. Without a wideband or being strapped to a fund there is no real way to know for sure.

 

[srtthis]

Popping and pinging at wot. Without a wideband or being strapped to a fund there is no real way to know for sure.

do a wot pull and shut it off and coast. pull the plugs and look at them.
need fresh plugs to get a good reading.

 

[f8tlfiveo]

+1 for wideband..

 

[JD1964]

Tell ya what I'll do. I'll swap the heads (new TFS springs included) intake, TB and switch to the 1.7 roller rocker arms. I'll put it all back together with the 19lb injectors, give the setup some time to adjust then take it in for a dyno pull.

We'll see what the tuners data says and take it from there.

Merry Christmas everyone. Be safe out there whatever you're doing.

 

[JD1964]

I'm getting to like the wideband O2 idea. I'm the type that likes a hands on approach. The ability to see what's happening and make periodic adjustments to A/F ratio is something I'm interested in.

What are the recommended kits?

 

[srtthis]

im a fan of the fast dual wideband set up. that way you can watch each bank

 

[JD1964]

im a fan of the fast dual wideband set up. that way you can watch each bank

That sounds more expensive. Btw, how would you address each bank individually if they were unbalanced.

What is an entry level type kit that is viable and more on the affordable side?

 

[JD1964]

I mean, I expect to make various changes to setup over time. So being able to see what's going on and adjust is the idea.

Stuff like- ok, time to change injectors, or raise/lower fuel pressure.

 

[f8tlfiveo]

160-200$ on eBay.. I have an aem kit I got for 160$, and I had a innovate lc-1 i used on my last car I paid 190$ either will be fine. Your not driving a full blown race car

 

[NIKwoaC]

I use this guy. It works pretty well.

http://www.aemelectronics.com/wideband-air-fuel-systems-15/digital-wideband-air-fuel-gauge-25/

 

[JD1964]

This one looks affordable too.

Innovate Motorsports 3795 DB BLUE Complete Wideband Gauge Kit (2 1/16 52mm) with LC-1, O2 Sensor, Bung and Plug
http://amzn.com/B001QFH2RW

 

[srtthis]

That sounds more expensive. Btw, how would you address each bank individually if they were unbalanced.

What is an entry level type kit that is viable and more on the affordable side?

AEM FJO or the LC1

the fast is about 400 bucks

 

[f8tlfiveo]

This one looks affordable too.

Innovate Motorsports 3795 DB BLUE Complete Wideband Gauge Kit (2 1/16 52mm) with LC-1, O2 Sensor, Bung and Plug
http://amzn.com/B001QFH2RW

This is the one I had on my old car. Worked good

 

[f8tlfiveo]

I use this guy. It works pretty well.

http://www.aemelectronics.com/wideband-air-fuel-systems-15/digital-wideband-air-fuel-gauge-25/

Nice thing about this, does not need a free air calibration. The innovate does, and recommends one every year I think. Which requires you to unscrew it and put it out in the atmosphere to calibrate. Pain in the butt.

 

[Decipha]

I recommend the ntk afx, its the most accurate low priced wideband money can buy

A close second is the aem

be sure no matter which wbo2 you get that you get it with a DIGITAL gauge ONLY