not happening...

 

For just runnin an extra set of injectors its really not that bad... you can even set it up to be boost referenced to make tuning even simpler... I had a similar setup on my RX-7 had a set of 1200cc for high boost... (526 whp 1.3 rotary) and 540 cc primary and 750cc secondary.
I forgot which one it was but maybe HKS has a add-a-injector setup I"m gonna attempt to use

 

I have actually been talking with a few people about switching and going with Big Stuff 3. Its a great setup friend has it on his Camaro and it is nice to work with and works well.

 

OK BD it's obvious you don't know anything about this motor.

Do some more research and listen to the people who know what they are talking about.

You haven't done either of those.

Listen to yourself....160lb injectors WTF?

60lb. injectors have a tough time maintaining idle in the 2.0

With a 2.5" pulley the IDC's are only around 65%

 

i know alot about this motor you have no clue what i have ordered

 

Dude........nevermind. I'm out of here. I could be here all day.

If you know so much tell me, what causes these idling problems with the 60lb injectors?

 

hey ctss/... I was hitting 82% idc with 60's a 2.5 and meth inj... I was also running a large amount of timing... but when it was in the high 30's one night I touched 82% at 7200 rpm at a 11.4:1 afr

 

Can anybody comment on those 50lbers that Edubs mentioned? Just wondering how those would do with a 2.79 pullley? What about idle quality? Tuning is still new to me.

 

so why don't you tell us? because not for nothing, when you talk about using 160#ers, it kinda makes you look like a moron...

 

Yeah Paul, that's with Meth and a 7,200rpm redline.

I'm talking straight 2.5" pulley and 60lb. injectors.

Either way my point is this 160lb injector talk is nuts.

 

yup agree there... also check you IDC formula... I think you may be off a bit cause just with the straight 2.5 and 11.4 afr I was still pushing around 76% IDC

 

im not saying i give up w/e the 50lbers dont have as constant a flow as the 60lbers do they will vary alot

 

ya'll are talking a bunch of fluff to me atm..but what does ordering parts have to do with knowledge of a motor? ya'll are bickering but nobody has said this?

just adding some gas to the flame

 

My point exactly, post #30.

I am officialy out of this thread. Later......

 

well, your question has been answered with the supplied information as best as possible... without knowing any other "top secret" info, there's nothing else anyone can do to help...

 

I'm new to this stuff; so, enlighten me. What's different between the 50 and 60 # injectors that makes the 50's not run consistant? Are they mechanically different? There is no sarcasm here, I am seriously asking these questions. I don't get why the 42# and 60# injectors work with tuning, but the 50# injectors are different. Thanks...

 

ok i have a 2.8 pulley from billet flow can i put that on to replace my 3.0 with out getting a check engine light>? by the way im running 42lbs per hour injectors?

 

as long as you retune for it... sure

 

I wouldn't unless you have a wideband set-up at the very least. Even with a wideband you won't be able to monitor IDC. The big fear is the injectors going static at high RPM's due to IDC of over 100%. That could cause serious issues if you are an unlucky person. I tell everyone the same thing, at the very least get the gauge, you'd be better off with tuning and the gauge; however, most will tell you tuning still won't solve the IDC issue unless you set the rev limiter lower.

I'm still waiting for someone to comment on my questions about the 50# injectors available.

 

I would say that it isnt a problem with the ecu but with the programing. 60lbs is not that big of an injector. I can see that the stock ecu does have its limits however they should be somewhat easy to get around. Especially if your running hptuners. Now as for idle big injectors are generally harder to control on any car. Most people just bump up the idle a tad. 50lbs unstable? Nope. Your going to have to tune to them but they should be more then fine as a stepping stone if you really want them. Personally if you think your going to push your car more in the future you might as well plan ahead and get the 60lb injectors. They are there for someone that is just leaning out slightly and wants a lil bump to stay in the comfort level 80% duty cycle. Something as simple as a safc neo piggy backed to the stock ecu with hptuners might be all that you need has anyone tried it? The only other thing that is close to being as cost affective to try out would be megasquirt. However not many people want to take the jump to the full standalone.

 

I have been looking into 50s for a few weeks now. They would be easier to tune your car with them as the PCM will be able to handle that size injector. As for how much they will be able to handle no one knows as I dont beleive anyone has tried them. There is no need to go to larger than 60s yet but im sure someone will need to eventually but till someone actually maxs the 60s whats the point and as far as going with someting like 95s or something that larger I dont think that will ever happen with these cars.

 

Does anyone know the Brake Specific Fuel Consumption. Im sure someone was on a dyno and has that number handy. I wouldnt run the 50lbers without some kind of tuning. Now would be a good time to get a tuning section on this site .

 

You have to tune for all size injectors you put into these things. If you dont they run pig rich well they run super rich from the factory anyway that will make it that much worse.

heres some injector claculators for people to play with.
http://www.rceng.com/technical.htm#WORKSHEET

 

Ok i just went with the standard .6 bsfc

These numbers are rough. Not exact
But say you want 400hp at 80% duty cycle.
At 58psi fuel pressure your going to need roughly 64lb injectors

280 42lb

300hp 50lb

375 65lb

400hp 65lb

475 75lb

525 85lb

575 95lb

1000 165lb

600 97lb

650 100lb


These are just generalized calculation please dont take them to heart. It can chanbe with each persons setup. And proper tuning and monitering should always be used.

 

ok nother easy question

will 42s work with a 2.8 pulley?

thanks