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560 injectors for 20 PSI?

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carvinbassplyr

10+ Year Contributor
211
10
Dec 15, 2010
Waterford, Michigan
I have searched around here and found some inconclusive answers since they're not running same setup as I am/will be. I have a 14B turbo that is getting the 7cm(16G) hot-side upgrade. The turbo has no shaft play and spins very freely. I plan on working my way up to 20 PSI with a MBC, rewired 255 FP, better FPR and 560 injectors. With a tune, will 560 injectors have enough to keep up with 20PSI? I currently have a Hard UICP with stock SMIC...but plan on getting a FMIC.
 
I have searched around here and found some inconclusive answers since they're not running same setup as I am/will be. I have a 14B turbo that is getting the 7cm(16G) hot-side upgrade. The turbo has no shaft play and spins very freely. I plan on working my way up to 20 PSI with a MBC, rewired 255 FP, better FPR and 560 injectors. With a tune, will 560 injectors have enough to keep up with 20PSI? I currently have a Hard UICP with stock SMIC...but plan on getting a FMIC.

Enough? Maybe. But its definitely not recommended because your IDCs will be way too high and will wear the injectors out quickly. Just go bigger they can be found in the classifieds all the tine for a good price.
 
I would get 650s and a wideband. 20 psi 650s would be a great choice, watch your knock and air fuel ratios.
I was hoping that with a good tune knock and lean fuel mixture wouldn't be TOO much to worry about...am I wrong in thinking this?

OH, and also will the 1G BOV have enough to handle that kind of PSI?
 
Will this be getting me in the 350awhp arena?

Like everyone say's each car tunes different, with that said my ECMlink hp rate's my motor with a 14b 7cm hotside, 750cc injectors, FMIC and 3inch gm maf at 328.7 hp at 21 psi. So tune and see what you get and let me know.
 
Awesome, thanx for all the advice everyone!

I'm also assuming that a tune on 110 gas will help squeeze some more ponies out of the car?
 
Not unless you can tune it more aggressively to take advantage of the extra octane ... other wise just poring it in NO it won't....Also I see you saying with a "tune" But I don't see you mentioning how your going to do that? (Ie with what)

As far as your first question the only true way to know how much boost your going to be able to run is to Log IDC(IE Injector Duty) and see... Evey car is different you can get a general Idea but in the end it really depends on the individual setup... .
 
I had the same setup on my 1g all summer with evo 560's and a fmic running 22psi using an afc neo to tune.If i remember correctly my idc's were in the high 80% range with a 11.2afr. But as said every car/tune will be different so its kind of a gamble with the 560's. I did end up adding water/meth later on which helped,but for how cheap you can get some 650's id say get those for some breathing room.As for the bov my crushed 1g held just fine.
 
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No, you definitely will not make 350whp with a 14B.

not completely true.. a 14b can get you 350hp but it will take more than just injectors!
In order to get numbers like that our a 14b you must know a bit on what you are doing!

but i would just get 650's or 750's to make it save!
And if you want to run e85 you would need, IMO, atleast 850's!
 
I run 22 psi daily on a 14b with 650's and a 255. Car runs great but don't expect the 14b to last very long.

Sent from my PC36100 using Tapatalk
 
not completely true.. a 14b can get you 350hp but it will take more than just injectors!
In order to get numbers like that our a 14b you must know a bit on what you are doing!

but i would just get 650's or 750's to make it save!
And if you want to run e85 you would need, IMO, atleast 850's!

Honestly 850's will work for alot of people on e85...
But anyone planing on running a good amount of boost on a mid sized turbo is gonna want atleast 1050-1150cc Injectors
 
not completely true.. a 14b can get you 350hp but it will take more than just injectors!
In order to get numbers like that our a 14b you must know a bit on what you are doing!

but i would just get 650's or 750's to make it save!
And if you want to run e85 you would need, IMO, atleast 850's!

Show me a dyno sheet where someone has made 350AWHP on a 14B with boost alone.
The turbo doesn't support the airflow to make that number. Most people don't crack the 300whp mark.
 
560cc will work for you, but if you don't have them yet buy something bigger. If you are looking to get 350 whp you will be looking at 750cc injectors. These will have your IDC around 80%.

14b turbo can reach some good numbers. 11 sec in a 1/4 on a 14b is really good IMO. To get there you will need all the supporting mods too. How is your mod list looking? I have some 660cc laying around PM me if want them.
 
Your car may hold up and it may not dont think oh i can bet buy, get by and then some. Get the correct mods and parts for your car go boosting, and have that added bit of insurance especially since most injectors are around the same price, but the safc will only go so far, dont know about evoscan but im going link, then it wont matter how big.
 
Show me a dyno sheet where someone has made 350AWHP on a 14B with boost alone.
The turbo doesn't support the airflow to make that number. Most people don't crack the 300whp mark.

I'm not at all saying it's a realistic goal for a Newb or allot of people. but, I'm sure it can be done...

Although someone could make 270whp fairly easily with the right mods

here's a link to pneumo's dyno sheet he made 325 @ 25 psi and ran an 11.5@118 Not everyone can do this though...
 
SO here's what I'm thinkin...even though the 14B is in fantastic shape as far as shaft play and spin...9/10 chances are the weak 6cm housing has cracks in it. With that said I'd be spending at least $150 to get a 7cm housing and that's before shipping. I see there are some good shape MHI big 16g turbos goin for $250 for the complete setup so if I could talk em down to $200 I'd be spending very little more for a much nicer more reliable turbo system. Then I'd run the 255 fp, 660/680 injectors, FMIC, better FPR, MBC and get something to tune with or have the tunning done for me by one my fellow DSM friends (who will actually know what they're doing). Did I miss anything?
 
sounds like a good setup! I have the same thing..... a couple more bolt ons and a completely new shepard/fidanza drivetrain but it makes good power and a 20 psi the 16g really starts to come alive!! i like your setup but what did you say you were going to tune with? it cant be an afc if your going with that injector siz ### i believe it maxes out the afc at about 660's. if you haven't decided yet link is prob your best option. nice setup though and good luck!
 
i like your setup but what did you say you were going to tune with? it cant be an afc if your going with that injector siz ### i believe it maxes out the afc at about 660's. if you haven't decided yet link is prob your best option.

Well If 660's would cut it then I'd use those and try goin' with afc...but it seems the general consensus is 750's which seems rather large, but I don't want my motor to be knockin' like an angry b!tch at the front door either...
 
If you're going with an SAFC don't go larger than 720s. As for 20 PSI on 560s its possible to do it, I currently run 20PSI on 550s using a 16G. As the guys said, watch your knock and if you can go with 650s or 680s I would do that since you will have good room to expand tuning wise and be able to run slightly more boost to reach your HP goals.

Replace the SMIC before running 20 pounds though, they start heat soaking after 15 pounds or so. I'm not too sure if you will get to 350WHP but 275 if not a little more should be possible if tuned correctly.
 
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