400hp injectors

[droptopgst]

I am looking to get from 300whp to 400 on this 50 trim. I have denso 660s in here now and they are maxed out so its time to upgrade. I was thinking either 850's or 950's. What do you guys think would be the best decision? Here are a few other things I was wondering. I do have DSM Link to dial the injectors in.

1 what size injector would be the best size to go with if 400 whp is my goal, and will only be running 93 oct. (no race fuel)

2 is the 850's going to give me any better startup, idle, or cruze running conditions than 950's? (this is a daily driver)

3 Is any brand better than another or any to stay away from?

 

[CanadianTSi]

What makes you think your injectors are maxxed?

But since you have DSMLink you might as well go big so you don't have to upgrade again.

 

[illeffekt vr-4]

660 will be enough for what you're looking for. my best friends 1g gsx put down 414awhp with a 57 trim and 660. whats the base pressure set at? denso's are a bit underrated so they're more than fine.

 

[~laser_craver~]

Yes you should be able to make 400 hp on 660's if you tune right. Also stated before with a dsmlink just go big so you dont have to upgrade again.

 

[Eclipsei95cl]

you have a tre tranny? But I see an auto in your gallery.

You need to tune your car man is the main thing.

More boost and some cams should help among other things. Switching to bigger injectors wont give you a 100 hp it takes a lot more than that.

 

[GSTBlack95]

A good tune will get you were you need to go.

 

[droptopgst]

I think my injectors are maxed because on 43 psi my idc is showing 101-107% on the link and its getting lean.

I only have a 50 trim not a 57 and was your friend uesing race fuel? I will only use pump gas.

Yeah I put the tre tranny in a few months ago. (not worth the money, shifts almost the same as the stock one did). I did the a/t to m/t swap a few years ago, but have not changed the pics.

As for the tune I cant got more than 300 hp. My boost wont go above 22 psi on the dyno. On the street it will hit 25-26 psi, but when on the dyno for some reason I cant get the boost over 22 psi. But regardless, my idc is 100+ so that is telling me that the injectors are not big enough.

 

[dsm-onster]

Check for boost leaks. There is surely an issue. At 11.0:1 660s are good for 400 hp as they are only running at 80% IDC. See the DSM_Tuning_Sheet_v2.1_.xls.

Even at a stock 9.4:1 a/f ratio, 660s would give enough fuel at 80% IDC for approx. 350 hp. Conversely, running 100% IDC at a good tune (11.0:1 a/f), their could be enoguh fuel flow for up to 510 hp!

Obviously, there is another issue other than injector sizing. . .

 

[droptopgst]

No boost leaks, anyother suggestions for me to try?

 

[daren_p]

What air/fuel ratio are you running and what kind of airflow are you seeing (lb/min) ?

 

[scorpio87m1]

Sorry to pull this back up but will 650 give me 400hp also

 

[CanadianTSi]

I made 400AWHP on a Mustang Dyno on a mix of mostly 94+ some 110 although the Injectors were around 100% IDC

 

[2gGSX]

Sorry to pull this back up but will 650 give me 400hp also

Check for boost leaks. There is surely an issue. At 11.0:1 660s are good for 400 hp as they are only running at 80% IDC. See the DSM_Tuning_Sheet_v2.1_.xls.

Even at a stock 9.4:1 a/f ratio, 660s would give enough fuel at 80% IDC for approx. 350 hp. Conversely, running 100% IDC at a good tune (11.0:1 a/f), their could be enoguh fuel flow for up to 510 hp!

Obviously, there is another issue other than injector sizing. . .

On gas, it would be enough fuel.

 

[scorpio87m1]

cool cause thats all i need How about wheel power with a big16g

 

[pboglio]

I have no problems pulling 440 h.p. on 660cc injectors. That is with a fuel pump rewire though on my little Denso 150 LPH pump. Without the rewire I was running out of fuel real fast.

 

[scorpio87m1]

I just found out that the Super AFC NEO cant be use will 650cc is this true?

 

[2gGSX]

It can, but you will be pulling a lot of airflow and you'll end up with pretty aggressive timing.

 

[scorpio87m1]

what do u mean by "aggressive timing" And if that the case can i just go with 550 and get 400hp

 

[2gGSX]

The SAFC works by lowering the airflow that the ECU sees. When it does this, it will put you on lower fuel AND ignition maps. The car will think you have less load, and thus ramp timing to try to compensate. The problem is, you're actually flowing more air, and now you have more timing than you want, and will likely be knocking.

550's will generally not be enough for 400hp.

 

[Joshuah Stedman]

The SAFC works by lowering the airflow that the ECU sees. When it does this, it will put you on lower fuel AND ignition maps. The car will think you have less load, and thus ramp timing to try to compensate. The problem is, you're actually flowing more air, and now you have more timing than you want, and will likely be knocking.

550's will generally not be enough for 400hp.

Can you just turn down your base timing?

 

[toofast82]

Sorry to pull this back up but will 650 give me 400hp also

No, 660cc injectors were only capable of 400hp back in 2006, when the thread was started

 

[50trimmed1g]

What makes you think your injectors are maxxed?

But since you have DSMLink you might as well go big so you don't have to upgrade again.

Probably because of high duty cycles. My 50 trim at 22 psi cams, ect was maxing my denso 660s at 103% duty cycle. I recommend link and some 1000cc rc's or fics. If you plan on going the e85 route just get some 1000-1600s and you'll be cool. I am running 1000's right now and with the same setup my duty cycles are in the 70's I beleive but now I'm at 28psi and on link.