Injectors for our upgrade ?

Mustang_289 · 03-16-2006, 05:22 PM

We've got the motor broken in,and ready to install the Vortec T-trim (8lbs boost). We're upgrading the fuel system to an aeromotive kit. What size injectors will we need for the following combo? We've been looking at 60lb. Also, what are the best injectors to use UPR?

Engine specs:

Keith Kraft 331
Eagle crank
JE Pistons
CompCam intake lift .532 exhaust lift .544
AFR 185 61cc heads

We're looking for 600+ rwhp, any input is appreciated!

Dark_5.0 · 03-16-2006, 05:28 PM

42# injectors at a minimum. I would probably go one step above the 42#ers just to be safe.

Sounds like fun.

lx mike · 03-16-2006, 06:14 PM

is that on the stock block?

Mustang_289 · 03-16-2006, 08:13 PM

No forgot to mention we've got a DART block

Jeff Chambers · 03-16-2006, 08:30 PM

You won't make 600 on a T-Trim at 8 psi of boost. At 600rwhp though I'd be thinking nothing but 60# injectors. For your combination with 8 psi of boost, 42# injectors will be OK and you'll be looking at more like 450rwhp, maybe a little more.

Mustang_289 · 03-16-2006, 08:45 PM

Our goal is 600-650 RWHP. I've heard something about low impedence high impedence injectors. Haven't really pieced all this together yet. Something about > 42lb injectors you'll have to put some sort of impedence matching box between the injectors and the computer.

Mustang_289 · 03-16-2006, 09:37 PM

Also, my son just corrected me the T-trim is setup for 10lb of boost. This is truly a father son project.

Jeff Chambers · 03-17-2006, 07:38 AM

You'll want to stick with high impedence injectors...ala factory style. 60# injectors will support the HP level you're seeking. However, just as a point of reference, we finished a project not long ago with a 2004 Cobra, KB Blowzilla (2400 cfm) at 17 pounds of boost tuned out nicely at 577 RWHP. The T-trim at 1200cfm and 8 psi of boost on that 331 bottom end is going to net about about 450 at the wheels. 10 psi will get you in the 475range. You'll need 15 psi to crack the 500 level.

03-16-2006, 05:22 PM	#1
Mustang_289 Registered Member Join Date: Sep 2001 Posts: 512	Injectors for our upgrade ? We've got the motor broken in,and ready to install the Vortec T-trim (8lbs boost). We're upgrading the fuel system to an aeromotive kit. What size injectors will we need for the following combo? We've been looking at 60lb. Also, what are the best injectors to use UPR? Engine specs: Keith Kraft 331 Eagle crank JE Pistons CompCam intake lift .532 exhaust lift .544 AFR 185 61cc heads We're looking for 600+ rwhp, any input is appreciated!

03-16-2006, 05:28 PM	#2
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: Injectors for our upgrade ? 42# injectors at a minimum. I would probably go one step above the 42#ers just to be safe. Sounds like fun. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

03-16-2006, 06:14 PM	#3
lx mike Undescribable Join Date: Sep 1998 Location: Ft Myers Fla Posts: 1,539	Re: Injectors for our upgrade ? is that on the stock block? __________________ Rice Haters Club Member #101

03-16-2006, 08:13 PM	#4
Mustang_289 Registered Member Join Date: Sep 2001 Posts: 512	Re: Injectors for our upgrade ? No forgot to mention we've got a DART block

03-16-2006, 08:30 PM	#5
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Injectors for our upgrade ? You won't make 600 on a T-Trim at 8 psi of boost. At 600rwhp though I'd be thinking nothing but 60# injectors. For your combination with 8 psi of boost, 42# injectors will be OK and you'll be looking at more like 450rwhp, maybe a little more. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

03-16-2006, 08:45 PM	#6
Mustang_289 Registered Member Join Date: Sep 2001 Posts: 512	Re: Injectors for our upgrade ? Our goal is 600-650 RWHP. I've heard something about low impedence high impedence injectors. Haven't really pieced all this together yet. Something about > 42lb injectors you'll have to put some sort of impedence matching box between the injectors and the computer.

03-16-2006, 09:37 PM	#7
Mustang_289 Registered Member Join Date: Sep 2001 Posts: 512	Re: Injectors for our upgrade ? Also, my son just corrected me the T-trim is setup for 10lb of boost. This is truly a father son project.

03-17-2006, 07:38 AM	#8
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Injectors for our upgrade ? You'll want to stick with high impedence injectors...ala factory style. 60# injectors will support the HP level you're seeking. However, just as a point of reference, we finished a project not long ago with a 2004 Cobra, KB Blowzilla (2400 cfm) at 17 pounds of boost tuned out nicely at 577 RWHP. The T-trim at 1200cfm and 8 psi of boost on that 331 bottom end is going to net about about 450 at the wheels. 10 psi will get you in the 475range. You'll need 15 psi to crack the 500 level. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

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