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Fuel Delivery?

J

joncsfreak

New CEG'er
Joined
Sep 12, 2007
Messages
25
Location
Carson City, NV
I am running a turbo now.. What would be needed for 350 hp @ flywheel.
Nitrous very soon.

I dont want to run too lean.....40 lbs injectors?

needed regultor upgrade?

pump?

what are some sites for cheap parts? I dont like spending almost 100 bucks for 1 part each.
 
joncsfreak said:
I am running a turbo now.. What would be needed for 350 hp @ flywheel.
Nitrous very soon.

I dont want to run too lean.....40 lbs injectors?

needed regultor upgrade?

pump?

what are some sites for cheap parts? I dont like spending almost 100 bucks for 1 part each.
Click to expand...
honestly if you want good reliable power you will need to spend some money. you will also want a 255LPH pump. if you have a return style fuel system then you can upgrade the FPR but you cant with a returnless system.

this will show you how how big you need to go with the injectors
ButtonPuncher said:
(injectors size*number of injectors)/0.55=Crank Horsepower

19# Injectors=(19*4)/0.55=138HP
24# Injectors=(24*4)/0.55=175HP
30# Injectors=(30*4)/0.55=218HP
42# Injectors=(42*4)/0.55=305HP
50# Injectors=(50*4)/0.55=363HP
60# Injectors=(60*4)/0.55=436HP
61# Injectors=(61*4)/0.55=444HP
71# Injectors=(71*4)/0.55=516HP

Please keep in mind that these numbers are all for crank horsepower and that you never want to run an injector wide open. With a 90% duty cycle you would get the following...

19# Injectors=((19*4)/0.55)0.90=124HP
24# Injectors=((24*4)/0.55)0.90=157HP
30# Injectors=((30*4)/0.55)0.90=196HP
42# Injectors=((42*4)/0.55)0.90=275HP
50# Injectors=((50*4)/0.55)0.90=327HP
60# Injectors=((60*4)/0.55)0.90=393HP
61# Injectors=((61*4)/0.55)0.90=399HP
71# Injectors=((71*4)/0.55)0.90=465HP

Again, these numbers are all for crank horsepower. You would loose an additional 10-15% of your horsepower with a manual and 15-20% with an ATX.

You also want high impedance injectors that have Bosch (EV1) style connectors.
Click to expand...


Also 350BHP is going to require a lot of boost. what turbo are you running? do you have any pics of the car?
 
Well after a port and polish 10:2:1 compression pistons with valve reliefs turbo and new connecting rods I think 350 @ flywheel is in my liking.

I have a 12 psi T3 turbo - Next month is nitrous
 
joncsfreak said:
Well after a port and polish 10:2:1 compression pistons with valve reliefs turbo and new connecting rods I think 350 @ flywheel is in my liking.

I have a 12 psi T3 turbo - Next month is nitrous
Click to expand...
If you knew you were going FI why would Up the CR? 12PSI on a 10.2:1 static compression will take you to about 17-18:1CR. Now considering im running a T3 super60 at 10PSI with a 9:1 CR and i make ~200-220WHP, Your a long way from 350BHP.

BTW if your running a wet shot of nitrous you wont need injectors sized for it only for the turbo.


PICS OF THE CAR PLEASE.
 
When I'm done I will post lots of pictures :p

Well the question I had was what sizes?

and I wanted to make sure I had to replace it all so I dont lean out and screw the motor over.
 
But also note that that 350 (roughly) is a est. @ the flywheel I know I lose some power through the drive.

like a stock 5.0 mustang isnt 300hp its about 290 at the wheels.
 
joncsfreak said:
But also note that that 350 (roughly) is a est. @ the flywheel I know I lose some power through the drive.

like a stock 5.0 mustang isnt 300hp its about 290 at the wheels.
Click to expand...

and 350BHP is about 300WHP in a contour.

joncsfreak said:
When I'm done I will post lots of pictures :p

Well the question I had was what sizes?

and I wanted to make sure I had to replace it all so I dont lean out and screw the motor over.
Click to expand...


I gave you a chart showing what HP different size injectors will support.
 
Yeah, I know you just seemed slightly confused why I posted this.

I really do appriciate the time you put to post the chart for my benefit.

Thank you very much,
Jon

Thank you also for helping me with my turbo questions/ Rebuild.
 
Stock PCM with a custom XCal2 tune. 42# injectors fed by a walbro 255LPH pump. i also have a rising rate adjustable FPR and a lightning 90mm MAF
 
it may be a lot of money but it costs money to build a custom turbo system that performs well and is reliable.

BTW the total cost for those parts i listed was just over $1000 including the dyno time and tune. i can replicate my kit for about $3500 without the tune.
 
Last edited:
striker2 said:
it may be a lot of money but it costs money to build a custom turbo system that performs well and is reliable.

BTW the total cost for those parts i listed was just over $1000 including the dyno time and tune. i can replicate my kit for about $3500 without the tune.
Click to expand...

where did you get your fpr from?
 
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