Laybourn74
New member
I run a RCD 68 VGT and wanted input on what size injectors would be the best for all around use. I have 285/150 hybrids right now and going back to conventionals.
Best injector size?
- Thread starter Laybourn74
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slc dzl
Active member
I would say some good 190s, why the change back from your hybrids?
04stroker
New member
What are you doing with the truck?
Laybourn74
New member
Truck pulls and weekend driver. Just don't like the fact of making oil with the hybrids, and want something a little more street friendly.
Derkperk
Member
I run 180/75 with my RCD 68. It cleans them up and runs very well. Wishing I would have done a 205/75 like java mentioned.
slc dzl
Active member
When I ran the rcd 68with 205/100s it cleaned it up pretty good but I think 190s would make a better street setup
04stroker
New member
I would suggest 205/75. I have ran a set of 225/100 with a 68mm it ran great just a little warm and smokey for my taste.
Breaking Habits
New member
205/100 or 225/100 Brian. The modified HPOP's will be done shortly so you can hold ICP with 225's.
Ill let you know when they are ready to do. We are waiting on Innovative's testing results currently.
Jared
Ill let you know when they are ready to do. We are waiting on Innovative's testing results currently.
Jared
Tyler@Street Diesel Performance
New member
mind if i ask who's hybrids?
There is a lot that goes into picking an injector size and the best person to talk to would be your tuner and injector builder!
Different tuners use different amounts of pulse width which will greatly affect how it runs. I have some tuners that love and swear by 75% nozzles and others that would prefer to work with 100% nozzles... lol... also not all nozzles flow the same so it is hard to tell sometimes what you are really getting.
Another thing is that if you are using stock hpop and not going to be adding big oil then you do not want to go too big. You can actually lose power once your ICP goes down. It all comes down to tuning, nozzles size and brand, pulse width, etc...
most would say that for that particular turbo 190/75, 205/75, 190/100 or 205/100 would be a good option. I think that 190/50 and 205/50 would also be a good option but 50% nozzles are not very common and I could/would only say that after that particular nozzle has been flow benched.
For reference Jesse Warren dumped 240cc of fuel with 350/75s at 2.4ms and 4000 ICP. That means with the nozzles he uses, max ICP, and 2.4 ms of pulse width you should be able to dump 135, 155, 175, 190, 205, 215, 225, and 240 sized body injectors with a 75% nozzle as long as your tuner utilizes 2.4ms of pulse width and you can hold max ICP. But go with different tuning, different nozzles, etc and it might not work the same.
Hope that helps a little... lol
Different tuners use different amounts of pulse width which will greatly affect how it runs. I have some tuners that love and swear by 75% nozzles and others that would prefer to work with 100% nozzles... lol... also not all nozzles flow the same so it is hard to tell sometimes what you are really getting.
Another thing is that if you are using stock hpop and not going to be adding big oil then you do not want to go too big. You can actually lose power once your ICP goes down. It all comes down to tuning, nozzles size and brand, pulse width, etc...
most would say that for that particular turbo 190/75, 205/75, 190/100 or 205/100 would be a good option. I think that 190/50 and 205/50 would also be a good option but 50% nozzles are not very common and I could/would only say that after that particular nozzle has been flow benched.
For reference Jesse Warren dumped 240cc of fuel with 350/75s at 2.4ms and 4000 ICP. That means with the nozzles he uses, max ICP, and 2.4 ms of pulse width you should be able to dump 135, 155, 175, 190, 205, 215, 225, and 240 sized body injectors with a 75% nozzle as long as your tuner utilizes 2.4ms of pulse width and you can hold max ICP. But go with different tuning, different nozzles, etc and it might not work the same.
Hope that helps a little... lol
Laybourn74
New member
RCD 285/150 hybrids, they were flow tested and sealed back in October and pulled it once At RCD's pull and put away for winter.
Tim1216
Member
sub'd. im curious as well. i was lookin into goin with 190/100s or 205/100 from warren diesel
Its hard to quote hp with any certain setup because trucks, dynos, weather, elevation, etc can change it.
I can tell you with 175s and 190s and a KC 68mm vgt I have seen 589hp-633hp and they run super clean. I would venture that 205/75 should be just above that range and might run a little smokey at WOT. Probably 600-650hp range with the right supporting mods
STR8LINE
New member
How well did the 285/150 run on the street? And how did it do at the pull?? Did you ever dyno the truck?
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