Enough Fuel for 500-540 hp?

[LOLZFWD]

I was just curious my car is making 467hp to the wheels now running a stock IM, stock TB, and a GM maf. Im upgrading the TB to Ported NA TB (65mm w half shaft n uber seals) speed density, and a port matched IM to my TB and head ports- and want to crack 500 whp...
Thing is, I'm wondering how my Precision 1250's are going to handle it, Im tuned for e85 right now and these ^^ are the only things Im changing currently, besides going from 30 PSI to 32-34 if need be just to get my goal.

Important Mods for this topic are:

Internals
Ross 2.0 pistons 9:1
Manley rods w/ARP 3/8 2000 caps
Eagle crankshaft
ACL chamfered bearings
HKS 272 cams
Supertech Dual valve springs and retainers
All ARP bolts and and hardware (standard)- main, rods, head
Fuel
Twin walbro 255 pumps (one in tank and one in line)
high flow fuel filter
Precision 1250cc injectors
-8/-10 steel braided Fuel lines
Fuel Lab FPR
Turbo
FP 3065 BB
2.5"-3" Stainless 02 housing
FP port matched exhaust manifold


What are your guys thoughts? Im leaning toward needing bigger injectors. Id also like to hear what in the 1250-2000 cc range injectors are good ones for street and tunability....want something really well mannered like the precision 1250's but bigger.

On another note would be nice to hear what other ppl made for power on similar setup/ internals capabilities.

 

[airmail96]

I haven't made that much power but for what you are looking to do on e85 I would suggest the hi z 1680s or 2150a

 

[bryanwheat]

What do your injector duty cycles currently look like? Also you would probably benefit more with a short runner manifold than you would by upgrading the throttle body.

 

[LOLZFWD]

Do not know what my duty cycle @ WOT is ...but currently I am running 10.5-10.6 afr's @ WOT 30PSI....room to grow a tad?? little conservative if u ask me...but it is E85...Im thinkin i should probably go bigger but wondering if it was necessary...i just dont wanna get in the 2000+cc range...streetability on those is iffy according. And i went with the bigger TB/Ported IM for the stock look...im not about flashy upgrades im about the hidden ones, like my FP mani and everything onmy car is basically tucked/hidden as much as possible. Thanks for the input tho

 

[Calan]

Do not know what my duty cycle @ WOT is ..

Injector Duty Cycle (IDC). You can view it ECMLink. Post up a WOT log.

...but currently I am running 10.5-10.6 afr's @ WOT 30PSI...

You're running those AFRs (on a gas scale) on E85?

If so, that is pig rich. You should be somewhere between 11.8 and 12.3 or so, under most conditions.

Im thinkin i should probably go bigger but wondering if it was necessary...i just dont wanna get in the 2000+cc range...streetability on those is iffy according.

That is mostly a myth from days gone by. ECMLink can handle as big a set of injectors as you want to throw at it. In fact, the FIC 2150's are some of the best injectors you can run with it.

The injector size you need is a function of airflow, pump pressure, and your IDCs. If you don't want to run large injectors for some reason, then you have to stay below the power level that requires them.

****

No disrespect intended, but based on your posts you need to do some reading and gain some knowledge before pushing much past where you are now.

 

[bryanwheat]

g. And i went with the bigger TB/Ported IM for the stock look...im not about flashy upgrades im about the hidden ones, like my FP mani and everything onmy car is basically tucked/hidden as much as possible. Thanks for the input tho

An aftermarket manifold isn't about being flashy, it is about matching your modifications to get results. Even a ported stock manifold is majorly holding you back. An aftermarket short runner manifold will raise your powerband and allow you to make power easier.

 

[LOLZFWD]

Injector Duty Cycle (IDC). You can view it ECMLink. Post up a WOT log.



You're running those AFRs (on a gas scale) on E85?

If so, that is pig rich. You should be somewhere between 11.8 and 12.3 or so, under most conditions.



That is mostly a myth from days gone by. ECMLink can handle as big a set of injectors as you want to throw at it. In fact, the FIC 2150's are some of the best injectors you can run with it.

The injector size you need is a function of airflow, pump pressure, and your IDCs. If you don't want to run large injectors for some reason, then you have to stay below the power level that requires them.

****

No disrespect intended, but based on your posts you need to do some reading and gain some knowledge before pushing much past where you are now.

Just because I'm a noob on the forum doesnt mean i'm a noob to 4g63's...IK Id sure like to have a WOT log, but i bought the car with ECM link V3 and didnt come with a cable/disc, need to get one, IK. I have an older version of dsm link 2.5 that works but is very limited to what i can see on there. And yes IK it is pig rich, that is the reason for the re-tune necessary, point being that if it runs so rich the way it is then at ~500whp I might get 11.8 (what i like to run @WOT) and be @ that power level already...And as far as 2150's being not streetable, My buddy has an evo fully built making 700whp full fuel mods similer to mine and its idle and stoplight driving sucks, but needless to say could be the tune, but another friend of mine has 2150's in his 1g w link and it was the same way....and i dont NEED that much fuel? DOUBLE what i have now, NO dont think so IMO.

Im just working with what i have, I am a former EVO guy that has a bunch of DSM buddies and I just picked up this 2G bc it was the right price and wanted to make3 it a fun track car, with basically little money dumped into it much further with what i have if im able to.

I should clarify my fuel pressure is @45psi and i have everything modded for fuel besides bigger injectors, and AMS tuned the car with the GM maf and it does run rich, goes through plugs and is kinda breathing restricted esp. on intake side of things. But it is SO streetable right now its like a stock car on the street, and thats how i like it. I understand what you guys are saying about the IM, but all i want is a better tune, (11.8AFR's@WOT)speed density, and to better the restriction on the IM a tad, enough to get me ~30WHP at least...seems reasonable to me, But i do realize its hard to determine from the computer screen if my injectors are big enough, I guess I was just looking to see if anyone with similer setup has cracked 500WHP on 1250's? And safely? And if no then what in the 1600cc range injector is the best?

Sorry, But dont give me the noob card, no offense. It was simply just a thread to connect with someone else that may have input that has done it before/know it can be done or has a good rep with some ~1600cc injectors.

Sorry for the rant and unclearity, my fault. Currently doing a EVO Brembo swap on the 2G, and was jsut curious to opinions.

Thanks

 

[StarFawkes]

I remember a thread where someone made 800+ on a stock IM.

Edit: found it, http://www.dsmtuners.com/forums/dyno-talk/438871-holset-hx52-dsm-816hp-569tq-38psi.html

 

[My1GLaser]

Without knowing your IDC it is hard to say exactly. I am running about 80% IDC right now. 51lb/min airflow at 26 psi on an HX-35. I have 950s and I run 60% E-85. I am sure I will hit 55lb/min airflow when I turn it up past 30-32ish psi and I will probably go with 1450s to give myself some headroom.

FWIW, I just switched to a SMIM after running a stock IM for 5 years. There was so much noticeable improvement its was very shocking. I am getting the same airflow in lb/min at 25-26 psi as I was at 35-36 psi with the stock IM. My 70-90mph acceleration times are only about .2 sec slower also! Looking forward to 35 psi on it again I was at 95% IDC at that boost.

You can see everything necessary on V2.5 to determine if you need bigger inj. If you lean it out to 11.8 like suggested, it will drop your IDC and you might get away with those inj.

So you can't post a log?

 

[snowborder714]

There's an injector size calculator on this page that might help
E85 Global Calculator - DSMtuners

 

[Calan]

Just because I'm a noob on the forum doesnt mean i'm a noob to 4g63's...Sorry, But dont give me the noob card, no offense.

You have 11 posts and are asking about injector sizes. Not sure why we should "assume" you know what you are doing based on that, but my bad.

Good luck!

 

[bradikus7]

A lot of people go with the 2150's or 2000 ID injectors because there are part throttle and idle issues with injectors larger than 1250. I don't know the science behind them but for whatever reason those high impedence 2150's and 2000 are known to idle just like stock. Check out this video:
https://www.youtube.com/watch?v=RX1xIvOWcNk

That's proof of how well they work. FYI I'm at 95% IDC on my Hx35 E85 setup only at 26PSI. I'm installing the FIC 2150's mainly to not be maxing out my injectors (which is harder on them) and then so I will never have to upgrade them again. So I vote you get some FIC 2150's.

 

[LOLZFWD]

You have 11 posts and are asking about injector sizes. Not sure why we should "assume" you know what you are doing based on that, but my bad.

Good luck!

I see your point there and i cant say i wouldnt do the same.

Thnaks for the input guys Im ###### gunna end up going big anyways, makes for room to grow later i guess huh!

 

[My1GLaser]

There's an injector size calculator on this page that might help
E85 Global Calculator - DSMtuners

Thanks! I lost all my DSM bookmarks when my laptop crashed last year.

 

[crash89]

I know a guy who made 511 AWHP on 1000cc injectors on e85 on the hx35.. So, those are the least you should go with.. Id say 1250s would be just fine.. But, have to think about the future as well.. Are you planning on going bigger? If so go with a larger injector..

Also, on another note, my buddys 700+ awhp Talon drives perfectly fine on the street with his set of 2150s.. Even with his Kelford 272s it idles way smoother than my spyder.. Maybe its all the way your buddy has his evo set up that makes it run like ass on the street.. just my .02 there