bigger injectors??

RPM427 · 07-15-2002, 10:08 AM

I am planning to install a Zex 125 dry kit on my friend's stang. His engine is making 275 HP N/A, with the 19 lbs injectors.

With the 125 shot, the engine will make about 400 hp. I put that through the fuel analyzer on this site and they said the injectors would require 100+ psi to fuel the engine. I know that going over 80 is bad. If I upgraded the injectors, then the car would be overinjected when its N/A, requiring about 29 psi. What do you guys suggest?

tireburner163 · 07-15-2002, 10:34 AM

I would rather have a over injected car than to go lean on the N2O.

WADS56 · 07-15-2002, 10:47 AM

You can run some 24# and it will not be over injected. The 93 cobra came with 24's and it was not making 275hp.
Wade

RPM427 · 07-15-2002, 11:40 AM

That is what I thought. The fuel analyzer on this site is very misleading. (no ofense

)

WADS56: What do you rev that 347 to? It must be high considering its N/A and a victor intake works in that combo.

WADS56 · 07-16-2002, 06:55 AM

Quote:

Originally posted by RPM427

WADS56: What do you rev that 347 to? It must be high considering its N/A and a victor intake works in that combo.

I take it to 6300RPM on the street, and 6600RPM on the track (when I raced it). I thought that the SystemaxII would be better for my combo but i was wrong. The victor feels like it has more down low, but there is no question that it is way better up top.

RPM427 · 07-16-2002, 08:22 AM

What FP should I run the 24 pounders at (285 N/A). The Feul analyzer says 29psi, but that seems low.

chris91LX · 07-16-2002, 09:35 AM

Quote:

Originally posted by RPM427
What FP should I run the 24 pounders at (285 N/A). The Feul analyzer says 29psi, but that seems low.

I have about the same numbers as you and I have it at about 35psi. The only way to truly know is to get you air/fuel ratio checked. I'm gonna dyno mine again and see where I'm at, I think I'm a little rich right now, but I'd rather be safe than sorry.

07-15-2002, 10:08 AM	#1
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	bigger injectors?? I am planning to install a Zex 125 dry kit on my friend's stang. His engine is making 275 HP N/A, with the 19 lbs injectors. With the 125 shot, the engine will make about 400 hp. I put that through the fuel analyzer on this site and they said the injectors would require 100+ psi to fuel the engine. I know that going over 80 is bad. If I upgraded the injectors, then the car would be overinjected when its N/A, requiring about 29 psi. What do you guys suggest? __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!

07-15-2002, 10:34 AM	#2
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	I would rather have a over injected car than to go lean on the N2O. __________________ 1987 Buick T-type 1998 HD Electra Elide

07-15-2002, 10:47 AM	#3
WADS56 gear banger Join Date: Aug 2000 Location: CHICAGO Posts: 1,144	You can run some 24# and it will not be over injected. The 93 cobra came with 24's and it was not making 275hp. Wade __________________ 79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor 93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe Ricer hater's club member #49

07-15-2002, 11:40 AM	#4
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	That is what I thought. The fuel analyzer on this site is very misleading. (no ofense ) WADS56: What do you rev that 347 to? It must be high considering its N/A and a victor intake works in that combo. __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!

07-16-2002, 08:22 AM	#6
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	What FP should I run the 24 pounders at (285 N/A). The Feul analyzer says 29psi, but that seems low. __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!

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