transamice

Running a stock setup ls1 2000 Firebird, looking for a good and easy to tune injectors for around 9 psi boost. Was thinking Bosch 42lb green giant but any input is appreciated.

Dimeomboost

My deka 60s were only good to 10psi 550 hp if u plan on going further at any time save yourself the hassle get 80s from the get go I had to send mine back to be made into ,84s plus added methanol

JoeNova

550 with Deka 60s? You were doing something very very wrong.

Dimeomboost

I haven't done anything don't know the first step to tuning I paid for all my dyno tuning he got it to 550 and said it's safe right now but get bigger Injectors and alky controls meth kit bring it back we can turn it up ??

JoeNova

You should be able to make 750whp with 60s.

Blazeracer

iTrader: (2)

Holley 120's are the best bang for the buck IMHO.

https://www.holley.com/products/fuel.../parts/522-128

However, I'm running Deka 60's right now and like em just fine, but I'm running N/A.

JoeNova

Deka 80s are easily the best bang for the buck. 1000 HP capable and they're $320 shipped for a set. You don't need something as large as the Holley injectors unless you're making serious power.

Dimeomboost

So are u saying this is a tuner issue or should I be looking into what's going on here I built this truck from nothing to what it is I'm just not tuner capable I have to rely that my money is going to someone that's got it figured out

robkin

You probably had the wrong settings for your deka 60s. Good luck finding the top secret data no one will share for deka injectors. I have tried every example of data I could find online and they just run like ****. I am actually considering decamping some stock ones. May just drop my dekas in the trash at this point, I have wasted so much time on them, I have already paid for a set of $1000 injectors in grief.

G Atsma

Robkin- This is a 7-year-old thread. I would think he solved it by now...

mk3cn4

iTrader: (3)

For what it's worth, since this old thread was revived... I'll throw this out there. I've had the same experience with Deka 60's.

With the SAME PSI and the SAME AFR and the SAME TIMING the Deka 60's just wouldn't produce the power that the 80's did.

I've spent HOURS tuning the Deka 60's and have tons of logs to demonstrate this. At the track, my runs were a full 3 tenths slower and when you look at the graphs of the runs for DEKA 60 versus DEKA 80 they were basically identical with 12PSI at the time, same AFR, same timing, but the Deka 60 just plain didn't have the power that the 80's did. Was also able to demonstrate using HPT acceleration maths. I tried many variances of Deka 60 injector data, and just figured I was doing "something" wrong. But I'd switch back to the 80's with slight tuning and the power was back. It's just harder to tune the IDLE on the 80's with my uncammed low breath 5.3 idling at 750rpm

It did not make sense how it's possible. X amount of fuel and Y amount of air should produce a static amount of power. Yet with the 2 different injectors, it was night and day. And yes I know this is totally illogical. But my Deka 60's are on a shelf ready to sell at a swap meet if/when I go. I would also question whether mine could reach 550HP, it'd need SO much boost/fuel in my application to get that high.

robkin

Do you have good settings data for the 80s in a gen 3 pcm? I have a friend who will sell me a set for a good price. Going to stop wasting my time with these 60s.

mk3cn4

iTrader: (3)

Nope I don't. All I did was grab others' tunes and test tinker with those and have it close but idle still sucks. Most of the injector data that is published didn't work too well for me for idling. But mine's very hacked up.

I tried going the decap route but the ones I selected were flex fuel ones (higher flowing) and also seemed to also have poor control with very narrow pulsewidth for idling. I think I should have done NON-flex ones and decapped those, if that's a thing I don't even know. But I was able to get maybe 15 of those (like $7 each LOL) and got 8 that balanced within 5% per bank. They flowed as high as the deka 80's if I recall on my crappy little 4-injector bench tool.

I think right now I'm using injector data from Sloppy Mechanics tunes of cars similar to my setup and it works but I still have trouble getting the 80's to idle well with my "low breathing uncammed stock 5.3" at 750rpm lol. I can post that injector data for you if you want but you should hunt out someone who has a build like yours. I'm boosted stock 5.3.

Ironically I could get the Deka 60's to idle much better using published injector data, they just didn't produce as much power in my tune/build. I too tried so many variations with the 60's that I honestly don't think it's my tune that's the problem. Spray pattern? Unclean cutoff? Counterfeit? I am like 99% sure they are not fake, did a lot of research into that too. No idea why mine don't have the power. DO YOUR RESEARCH on the Deka 80's, there are a LOT of counterfeits out there for those. Maybe more fake than real at this point LOL.