Perfect.disguise

What is the rule of thumb max Hp you can get using 42lbs injectors? Would it be the same with a turbo as the Heaton?

thatotherguy

Im guessing no more the 40 to 60 hp or maybe not even that much

Red2.4SS

It is not quite so simple, but I believe that those with 2.9" and smaller pulleys are upping it to 60#.

Correct me if I'm wrong.

I'm rolling 60# on mine with 260 WHP.

LamboW9

iTrader: (3)

ya always got the option of running nitro/meth injection

restonSS

meth is de best!!!

invisible

This man speaks the truth!

rrutter81

turbo would generate more hp since ur using hp to spin the heaton.

42s and the heaton is generally 40 hp /w a 3.0 pulley.

zinner

I have been using 42's and a 2.8 for 2 years now.

SSCobalt~SSZ24

2.9 with 42s i wouldnt go any lower personally

BRN169

Matt said my 42s were maxed out when he tuned my car. I'm on a Stage II pulley with an intake, custom tune, 1 step colder plugs and full exhaust. It made 262whp on a Mustang Dyno...

light'bolt

Try this site out, is this what you were looking for?

http://www.witchhunter.com/injectorcalc1.php4

mrniceguy8211

2.8 on 42's and stage 3, been this way most of it's life. 35K and still problem free ( knocks on wood )..

Area47

our base pressure is 58-61.

the general 43.5 doesn't apply. nor does the fact that we are a returnless system.

the most i got out of my 42's was 273 to the tire.

LamboW9

iTrader: (3)

Area so your saying if we had a return fuel line setup that we'd gain more fuel out of our 42lb injectors?...about how much would we gain?..is it cost effective?

Area47

not exactly.

base pressure of 58. do some calcs based upon this number. we. the stock returnless people. are cramming more fuel into the injector as it is.

the 42's basically work as 50's.

LamboW9

iTrader: (3)

so your sayin it'd just be better to drop a pulley size with a tune on 42's to get the best effect?...2.9 or 2.8?

just asking cuz with a 3.0 pulley i thought they were borderline going static...an a 2.9 through them static already

Area47

you're screwed out of the box. have fun with it.

Tomtwtwtw

There are too many variables to say how much hp you'll get out of the injectors, but one thing is certain, you'll get more out of a turbo than you will out of the s/c, because as said above, the s/c takes hp to spin.

i.e. 300 crank

300 hp - 40 to spin the blower = 260 for the drive drain - 15% drag loss ~ 221 at the wheels.

300 hp - 0 for the turbo - 15% drag ~ 255 at the wheels.

Blower losses will vary from person to person, but the general rule of thumb is that the higher the boost, the more energy required. If you drop the pulley down, but free up the airflow, you can get a cooler charge of air and lower the overall boost while increasing power and minimizing the blower loss.

I believe under ideal conditions, 42lb injectors (actually flowing at 42lb), are good for just over 300 crank hp. As also said, though, the fuel pressure of the ss/sc makes them flow more than 42lb/hr.

So many variables.

Perfect.disguise

Yeah, I was more interested with the turbo info of them over the S/C

restonSS

so much confusing stuff to think about!

Tomtwtwtw

My numbers are rough estimates, but you get the idea. I believe I read somewhere that on the ss/sc stock, the blower consumes 35 hp to make the 12 psi. So take your average whp dyno of around 200, add ~30 for drivetrain loss, and ~ 35 more for the blower, and your stock LSJ is doing roughly the same amount of work (hp) as the LNF. Except due to mechanical differences, you're getting less power to the tire, and consuming more fuel to do so.

Perfect.disguise

Is it safe to say if you can run 15 psi on the Heaton it's safe to run ~15psi on a Garrett T3 T4?I know turbo size don't create the same hp per lbs as some others..

Tomtwtwtw

Turbos compress air different than an s/c, and I don't know enough about them to give a good answer there. Sorry.

light'bolt

What's the number before the 300hp? You know the bare bones engine before adding the supercharger or turbo that'll really surprise you.

Tomtwtwtw

Those numers weren't supposed to represent any specific engine, and there's no real point in knowing that number anyway, as engines built for boost will generally make less n/a power than one not built for boost.