Which to buy, 50# or 60# high imp injectors?

[2QUIK6]

Seems that alot of vendors are only carrying the 60# injectors now. I'm ready to upgrade 50s but it seems that everyone is selling 60#. 50's should be plenty big for my plans, but you never know.
My main question is, are there any down sides to 60#ers?
They seem to be fairly new and I don't like cutting edge stuff since it seems to fail the most, I prefer proven parts.

 

[d0n_3d]

we sell the 60's (or 65's as we call them) for $390 set of 6...I run them on my car every day and they are awesome...no ecm mods needed...PLENTY of fuel for even a 67 P-trim turbo...give me a call at 219-996-7832 and I will hook ya up!

 

[2QUIK6]

Don't worry Don, was planning to get them from PTE which ever set I decide on since ya'll flow match them, at least I assume PTE still does that on every set?
Another reason I'm undecided is I know 50# are very predictable and more linear than some other sizes, such as the 40#ers I have now when it comes to programming, I program my own. The 60# I have not heard how their programming characteristics are.
Low 11's is as fast as I'll ever go, got another project car for faster than that.

 

[2QUIK6]

...and nobody seems to be consistant on what they call them..some vendors call them 65#er while others call them 60#ers..what's up with that, if no one knows for sure what they flow why would I want them?

 

[Darth LC2]

I have 50 lbsinj. for sell. Check my post on the parts for sale.

 

[2QUIK6]

Originally posted by Darth LC2
I have 50 lbsinj. for sell. Check my post on the parts for sale.

Only looking for new flow matched ones, no used ones please

 

[2QUIK6]

ok, after having some time to research a little more, the 60#ers are starting to look like a good choice since they have 3 nozzles and a better spray pattern at idle and they would be more injector than I should ever need, looks like a lot of people have had good luck with them, haven't found anything negative. At 100% DC they flow a little more than 65, at 90% they flow 60. In order to be used in Marine applications they must flow very precise....hell thats why most inboard marine engines were still TBI in the mid 90's when every car motor was port injected.

 

[bruce]

I've been running 60s for almost 9 months now.
Notta problem.

Have even run them in batch fire mode, and still had a nice 750 RPM idle in gear.

And while folks are making various claims about size and accuracy, unless your running them at the max., don't get too obsessed with hype. If you've ever looked in a GN's intake plenum, you'll notice alot of fuel staining. The plenum is sort of a series of tornados, and mixes the discharge spray patterns all around. And at low engine speeds that pretty well evens things up. At high engine speeds the inherit air flow distribution problems raise their heads, and injector size matching ain't gonna cure that, in reference to the 60s, IMO.

 

[d0n_3d]

Originally posted by 2QUIK6
...and nobody seems to be consistant on what they call them..some vendors call them 65#er while others call them 60#ers..what's up with that, if no one knows for sure what they flow why would I want them?

To my knowledge, the reason WE call them 65's is because that's what the brand calls them (Mototron) and we have flowed them here at the shop and they flow between 63-66 lbs/hr static which is 100% duty cycle...since nobody wants to run that high of a duty cycle we tested them at 90% and they flowed near 60 lbs/hr...thus the name...same thing goes for all injectors

 

[2QUIK6]

Originally posted by d0n_3d
To my knowledge, the reason WE call them 65's is because that's what the brand calls them (Mototron) and we have flowed them here at the shop and they flow between 63-66 lbs/hr static which is 100% duty cycle...since nobody wants to run that high of a duty cycle we tested them at 90% and they flowed near 60 lbs/hr...thus the name...same thing goes for all injectors

Yep, that's what I found out about them in further readings. I'll be giving ya'll a call sometime this week Don, Thanks

 

[2QUIK6]

Hey Don, I called and talked to Brian I beleive and ordered a set, got them yesterday and was wanting to know how I interpret the numbers scribed onto each injector? Brian said they would scribe the flow rates on each injector but these numbers don't make sense to me, they are numbers such as 30157/24204 each one is different??
Or are they all just flow matched within a small percentage and it doesn't matter??

 

[Marc87GN]

I'm think of going with Siemens 57# inj. from Racetronix. I believe the injectors I have now have had it. I refuse to take steps by going 36, 42, 50 and so on. I plan to do it once and I was wondering if anyone is using these yet? I have an extender chip on the way so I can easily set it up for them without a problem while running the stock turbo.

 

[Racetronix]

Originally posted by Marc87GN
I'm think of going with Siemens 57# inj. from Racetronix. I believe the injectors I have now have had it. I refuse to take steps by going 36, 42, 50 and so on. I plan to do it once and I was wondering if anyone is using these yet? I have an extender chip on the way so I can easily set it up for them without a problem while running the stock turbo.

There are many people using the Siemens 3102 and 3172 injector as they have been around for many years. There is a wide selection of chips / calibrations available for the 3172's.

 

[Marc87GN]

Originally posted by Racetronix
There are many people using the Siemens 3102 and 3172 injector as they have been around for many years. There is a wide selection of chips / calibrations available for the 3172's.

Thanks for the reply, I noticed that the Extender chip mentioned that injector specifically as a choice when selecting injectors.