My lightning is heavy modded JDM motor etc when should 50# injectors be installed am i over due thanks

 

never, go straight to 60#... If you are on a built motor, I think you should be really considering it.

 

How much HP Bro ?

50 should be all you need, and you can save a ton buying them.
I got mine Brand New for $325.00. The trick is to have enough, but not too big. Too big of an injector and you'll have drivability issues around town, I've seen many take 60's out and go smaller (Don Bolts is a good example)

Johnny L uses 50lb Injectors to run 9's
JJ uses them to run 10.5's
They're sure the hell good enough for me to run 11's
(and chase the 10 sec dream)

JDM site shows this:
50 Pound Injectors- For Lightnings that are making over 450 RWHP and up to 600 RWHP. That just about covers most L's

Remember most are using Nitrous once they get up and over 600HP, (and your injector size has NOTHING to do with that),
nitrous supplys it's own injector, (the nozzle)

 

I really don't agree with that statement but to each his own... A skilled tuner will have NO problem tuning for 60#, and all injectors cost about the same regardless of how much the flow... You may find some 50#'s lower, but that is just because everyone is dumping them if they have them in stock... 55# is about the lowest you will find on a built lightning now a days.

 

Ibelive my lightning is ready for 50# if i can find them for $325.00 new

 

Agreed. Sal recommended 60# injectors instead of 50# for my setup; and, I'm only performing around the 450 rwhp mark. I have the option of growing into them as the mod bug bites.

 

You bid on mine. they were as good as new. They ended at $317. 10's are possible are 50's, but I found tuning and consistent times better on 55's. We see in April what 60's hold.

 

Over the years I've tuned many vehicles with injectors from 16 pounders all the way to 160 pounders. Here is MY thoughts on the injectors being discussed...

50s - they aren't bosch injectors and can be a real PITA to tune, because they are very inconsistant set to set. They have a poor spray pattern. I've OHMed sets of 50s out anywhere from 10 to 15 ohms.

55s - we were one of the first tuners to start using the 55s when they came out, and ran them on our 01 test truck for a while. They performed flawlessly and tuned super easy. I have nothing bad I can say about the 55s.

60s - this is what we currently use and sell. These injectors have a great spray pattern for the large flow size. They perform well and can support a LOT of hp. They ARE a pain to tune for, but if you know what you are doing, it's not so bad. These injectors are rated at 60lb, but in my opinion, they are bigger than that.

So I don't use 50s because I feel they are not worth the money for the quality and little power range increase over the 42s. the 55s are great. But the 60s are only $20 a set more than the 55s, so there's really no reason to get the 55s when the 60s can support much more hp.

But like everything else, it's all in the tuning .

 

Thanks sal for the good info on injectors

 

Geee..........

this is the first time you think Rob is talking chit

 

Here Gator Gator .....

 

Careful what you wish for

You know exactly where Iam at. Just make sure your money is sent in, and then make the April 16th event

 

I agree with brother Rob, 50's (which I ran 10.87 on) will make well over 600 hp. My old built motor ran 630ish on them with a flat 12 A/F ratio!

However, There is nothing wrong with 60's either ( i run them now), They work fine on the street or track.

BTW, Don's Bolt didn't have 60's he had 55's that he didn't like...But it actually was a MAF problem that was causing driveability issues for him at that time.

IMHO, ask a tuner of your choice what parts and peices you should run and what he prefers to tune to...If you go mixing and matching a tuner might not be able to tune you combo to its potential!


Oh and Ron, I disagree with your statement that MOST of the 600+ club are running NOS!

I am 650+ all throttle no bottle as are most of JDM's built motors out of the box!

 

With all the talk of bigger injectors does anyone know what duty cycle you are currently running? That is one of the most important aspects in choosing the size of injectors. Duty cycle is a figure express in % of the injectors maximum flow. Example: 42LB injector at WOT 80% D/C. This exmaple has about a 20% cushion on flow. This is about ideal. Enough room to pad any potential tuning hiccups but not over kill. Take the same example truck and throw in a set of 60LB injectors and now your D/C may only be 60%. Looks like a bunch more padding on the max flow but it's just waste.

Now if your future plans do call for more power then maybe buying big the first time is the way to go.

My main point is to find out your D/C before you shop for injectors. You will need a decent scan tool to do it. Your Autozone code reader will not be able to do it.

 

what is the limit of rwhp that the 42# injectors handle??