sky88

510 cc injector and big fuel pump can handle how many hp and boost.Please kindly let me know

beepy

510cc / 10.5 = 48.6 lb/hr.
48.6 lb/hr x 4 x 80% duty / .50 BSFC = 311 hp, conservatively.

If these are low impedance they can handle more than 80% duty, and if you have a FMU the power supported will go up in a ratio of (max fuel pressure- max boost pressure) / 44 psi. However if you are making enough boost to make this level of power, and are using 91 octane fuel, your BSFC may go up to .55 or even .6 to prevent detonation.

sky88

using 97 octane and with microtech ecu can it handle 400 hp?

sky88

bump

B18C1CYA

i think you should be ok my buddy made 352whp and his dsm 450s were at like 94%, thats higher than i would want it but i think you should be fine with proper tuning

sky88

thanks i am not sure a bout fuel pump do u think i can check the fuel pump ability through my microtech? I dunno what kind of fuel pump it is but it is definately better than the stock one,how can i get the info form the fuel pump

crazyitr

Why run such small injectors on a turbo car?
I had 550 injectors in a turbo GSR motor. 30 seconds in fifth gear melted my fully built motor to scrap. All it takes is a little more boost and you are toast.
Run 720's, you are much less likely to lean out or max out your injectors.

sky88

But my tuner told me 510 is all fine with tuning.How much is a 720 cost?

Turbo E

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crazyitr &raquo;</TD></TR><TR><TD CLASS="quote">Why run such small injectors on a turbo car?
I had 550 injectors in a turbo GSR motor. 30 seconds in fifth gear melted my fully built motor to scrap. All it takes is a little more boost and you are toast.
Run 720's, you are much less likely to lean out or max out your injectors.
</TD></TR></TABLE>

blame your tuner then.

crazyitr

With 550's I was maxed out at 375 hp. My turbo car was only running 12psi boost. The turbo was a Garrett super 50 and everything else was standard Drag 3 issue. When I made 15 psi in fifth, I am sure I was pushing over 400. Nothing any tuner would do would have saved my motor. I good tuner knows not to push a set of injectors past 80%. The duty cycle becomes too short and there is more chance of failure. The best question is how much does your turbo support. If your turbo supports 450 hp, then you should get injectors that handle that much hp like 720's. You also need to have your tuner tune your map out to higher level of boost, in case you have a boost spike. Boost controllers, waste gates are all subject to failure. You may run low boost day to day, but a boost spike is all it takes to destroy a built motor in seconds. I was mislead to think a built motor (sleeves, pistons, rods etc) makes it indestructible, not true.
My car should have had 720's. I bought the car with the 550's. Ignorance is what caused my car to blow up.
You live and learn
Learn from others mistakes
It's much cheaper that way

Turbo E

good advice. still your tuner should have accounted for boost spikes during tuning.

sky88

ok look here every one ,u guys are running 91 octane right ?but i am running 97 octane so do the 510 injectors can manage about 400 hp wothout any problem please kindly answer my question ,and i am using two fuel pump.One internal and one external.

beepy

Using 97 octane you can safely tune to a lower BSFC, but even at .5, you will be pushing the injectors to 102% duty. Not possible. 400 hp is not doable with 510cc injectors.

With 720cc injectors, you can make 400 hp at a conservative .55 BSFC and a safe 80% duty. But even then, if you have poor tuning, and have to compensate with more fuel, you will quickly run out of injector.

And here I am talking about Bhp. 400 Whp is not doable with either.

sky88

my tuner told me to add another injector if the 4 510cc injectors couldnt handle

JDMCRX

iTrader: (2)

Weird my tunner was saying at 256hp i was maxing my injectors out.

I was like i do not think so.

sky88

so whaT DO U THINK?