I just installed aVORTECH SUPERCHARGER KIT: T-TRIM, V2-SQ and put on a set of simens 60lb injectors, the vehicle will not run just stalls, no tune yet, do i need to bleed the fuel line after changing the injectors, this was installed on a 2003 z06, thanks.

 

I have personally installed injectors and didn't bleed the fuel line. Make sure you let the key stay in the on position before you start the car for a few seconds so the pump can prime the system.

With that being said it couldn't hurt to let the pump build some pressure like I described and then bleed a little off.

Also check to make sure all of your clips are hooked up right. As long as the car is turning over then this is not a problem, but I have had a stuck open injector hydrolock a motor after an injector install. If that is the case pull the plugs so the fuel can get out and look for the bad injector.

 

The injectors are to big for the car to run without a tune. If it ran any at all it probably washed out the spark plugs so they will need to be changed. They will also wash the rings out and put a lot of gas in the oil. You'll have to put your stockers back in so you can get it to run and change them out when the car is strapped on the dyno.

 

Car isn't going to run with 60's without a tune.

 

maybe i should have it towed and have the pros tune it, i hate to take out the injectors out, what a pain, but will see, thanks!

 

That will work also, as others have said..The car will not run on the 60lb injectors w/o a tune. So a tow to tuner or swapping back in the stockers and driving conservatively to the tuner will resolve the problem.

 

!!!!

 

The car may not run with his injectors even with a tune, depending on the specific characteristics of the injectors he's installed. Many injectors of that size have a large offset (the time delay between the ECU command and the point at which the injector actually reaches full flow) and such slow-opening injectors typically don't work well in the Corvette engine if at all, especially at idle/low rpm.

I'd suggest identifying the specific injectors involved by manufacturer and part number, or alternatively checking their impedance (resistance) since the electrical characteristics to a great extent determine offset, and then consulting a tuner who can determine if the ECM can be programmed to work with them before just investing in a tune that may not "take".

 

 

Actually, if they are 60# injectors they are almost guaranteed to run, and quite well.

I just finished tuning my injectors (60# Mototrons, one of the few 60# injectors out there) and the key is in getting your volumetric efficiency right, then getting desired airflow right, and finally lowering your minimum pulsewidths. The OEM offsets are working fine although I suspect some fine tuning here would really help the car drive exactly like stock -- the only issue is there's no good way to setup the offsets with these injectors since I don't have the data or equipment to figure out what the offsets should be.

Changing the minimum pulsewidths really helped a ton, the PCM by default enforces some relatively large pulsewidth values since it's expecting injectors that don't flow a lot. So when you get into larger injectors in the low RPM/high vacuum portion of your fueling curves, the PCM won't let the injectors open/close as quickly as they should to give you proper fueling.

 

this is the info for the injectors: At the standard fuel pressure of the LS1 and LS6 engines, 58 psi (4 BAR), these injectors flow 60 lbs/hr at 43.5 PSI (3 BAR), and up to 85 lbs/hr at 87 PSI! In addition, these units are high-impedance; making them compatible with most ECUs including the GM factory PCM and ECM used on the LT1, LS1 and most other GM V8 applications.

Despite the high flow rate, these injectors provide a very linear flow rate even at low pulse widths allowing you to use a larger injector that normally possible without hurting idle and low speed driveability.

These injectors are able to function at high fuel pressures and don’t exhibit the high fuel pressure handling problems found with many other high flow high-impedance injectors. This makes these injectors very well suited to turbocharged and supercharged applications that see high fuel system pressures.

These injectors are the perfect upgrade for stock manifold & rail assemblies; replacing standard 75 mm packaged injectors. Also recommended for use in custom manifolds where optimum injector targeting requires more length.

Engine performance and running quality is enhanced through the optimized spray pattern of these injectors. Unlike many “pencil stream” high flow injectors, these high flow injectors utilize a multi-orifice tip providing a true 30 degree spray pattern for improved mixture preparation. This results in lower BSFC and better idle quality than many injectors of less flow.

Comes with high performance O-rings and inlet filter installed.

Custom O-rings and spacers are also available from LPE when using these injectors with the LS2 intake manifold. You will also need to change the injector connectors when using these injectors on vehicles normally equipped with USCar connector injectors such as the 2005 and newer C6 Corvette and 2005 and newer GTO.

Flow: 6.9-10.7 g/s @ 250-600 kPa
Impedance:12.5 Ohm
So will the injectors work on my car or not,

 

Injectors with the specs you describe should work perfectly in your car with the mods you've made, once the ECU is re-programmed to match.

 

Those sound like the Siemens/Mototron 60# injectors, which are the same ones I have. Trust me, these can be made to idle and drive perfectly fine, once you have a good tune on the car.

Who are you having tune the car? Some guys will just slap an IFR table in there and call it a day, but given the size of these injectors, they need to also edit the minimum and default pulsewidth tables.

 

Xtreme Motorsports in Tempe, Az tune is about $500, they put a rear end and tune in my 98 and did a great job!

 

I believe all you have to do is change the IFR (injector flow rate )in the comp to the size you are installing--60---Your car came with probably 26's or 28's----having a smaller # in the IFR table than what you actually have makes the engine rich--in your case 60 vs 26 ? horrible rich---adjusting the Flow rates should take care of all the pulse widths for you automatically--I agree--you really need a tune--I thought when you purchased a kit like yours, it came with a handheld programmer to give you a basic starting point tune---If not it should-