2009 ZR1 Injector Values Inside

[RWTD]

Here's the injector values (attached in Excel format) from the 2009 ZR1, in case someone wants to use these injectors in their GM.

FYI, in the IFR table, GM has the 58 psi (aka 400 kPa) column listed at 56.43037 #/hr, which is basically the size of the injector.

Regards,

James

[eficalibrator]

Excellent reference info, James. Did you get a chance to look at the injectors and note the part number?

Once these become available, they can and should become one of the first choices for forced induction LSx street cars.

[Mike@G-Force]

Very Good Info!

[Redline MS]

Excellent reference info, James. Did you get a chance to look at the injectors and note the part number?

Once these become available, they can and should become one of the first choices for forced induction LSx street cars.

I hear that! AND we have all the correct injector data to go with it!

Howard

[LosLS2]

Hell yeah!!!! I just started a thread on LS1tech asking for this very information. I will link it.

[RWTD]

Hell yeah!!!! I just started a thread on LS1tech asking for this very information. I will link it.

And link us to that thread!

[69lt1bird]

LS9 and LSA use GM pn 12598646 and AC Delco pn 217-3350.
13* spray cone angle
391 g/min flow rate @ 400kPa
51.72 lb/hr @ 58 PSI

This is per the blueprint.

GMSPO has stock but not many. $90.26 list price each or cut that in half for dealer cost.

[slowcoder]

$46.94 from GM Parts Direct.

And I might just need new injectors for my LS1..

[RWTD]

51.72 lb/hr @ 58 PSI

That completely contradicts GM's IFR values for the ZR1 calibration. Go figure!

Thanks for putting up the part #s! Does the blueprint show the injector physical size specs in regards to external dimensions? It would be nice to have those, along with say the LS7 injector physical size specs.

[Blades]

Wonder if the offset vals would push me more towards accuracy with these SD injectors -

http://www.racetronix.com/M145FM2.html

Static Flow Rate @ 58.0PSI (400kPa): 53.7 lb/hr = 6.77g/s = 552cc/min (+/-3%)

Do you think that they flow tested using n-Heptane like racetronix? Are the values converted from n-Heptane?

[RWTD]

Nah, no way they are the same in regards to values.

[Mobile Chassis Dyno]

James,

Do you have a copy of a stock bin from a ZR1? I would to have a look at it.

[MECH-ENG]

Wonder if the offset vals would push me more towards accuracy with these SD injectors -

http://www.racetronix.com/M145FM2.html

Static Flow Rate @ 58.0PSI (400kPa): 53.7 lb/hr = 6.77g/s = 552cc/min (+/-3%)

Do you think that they flow tested using n-Heptane like racetronix? Are the values converted from n-Heptane?

Nah, no way they are the same in regards to values.

I thought the samething when i saw the flow rate as compared to the Siemens FI11351 or 04891574AD injectors. Has anyone had these flow tested or have good injector data for these injectors use on a GM LS2 or other motor. RWTD just curious what about the ZR1 data says they are not similar at all?

[DSteck]

So if these were put in a Z06, what's the proper way to edit the IFR vs. Manifold Vacuum table? For manifold vacuum of 0 (dead center in the table), I have 41.74 lb/hr. Would I take the ratio of the ZR1 injector at 58psi to the LS7 injector at 0 manifold vacuum, and multiply every value in the table by that?

Basically, 56.43047/41.74 = about 1.35195. So, would I multiply my whole IFR vs. kPa table by 1.35195?

[RWTD]

DSteck, no, don't ratio like that. Input them in properly. Lemme explain:

You have an '06, so your values are listed in kPa VAC, so you'll just need to convert them over to kPa Pressure Delta. Here, this should help:

VAC     80	70	60	50	40	30	20	10	0	-10	-20	-30	-40	-50	-60	-70	-80
RAP     480	470	460	450	440	430	420	410	400	390	380	370	360	350	340	330	320

You can easily do some math to make it exactly precise to match the factory values up. I'll work to build you a table later when I have some time (I can do it pretty quickly).

[DSteck]

I understand now. I'll have to convert to kPa, and then interpolate since the ZR1 values don't line up with my '06 Z06 values. Thank you, good sir!

[RWTD]

Yeuppers, you got it! You may not even have to use the interpolate function of HPT, but rather get it exactly precise. However, very minor variations won't really matter much, as you know. FYI, 1 psi = 6.894757 kPa.

Also, I'll add in the Metric labels up in my xls file above, as I only have the Imperial ones currently. That should help to make it a lil easier.

[DSteck]

Yeuppers, you got it! You may not even have to use the interpolate function of HPT, but rather get it exactly precise. However, very minor variations won't really matter much, as you know. FYI, 1 psi = 6.894757 kPa.

Also, I'll add in the Metric labels up in my xls file above, as I only have the Imperial ones currently. That should help to make it a lil easier.

To me, it'd be easier to just use Excel, fit a trendline, and use that equation to generate values at each cell. I can't imagine the error would be enough to make or break the calibration. Now if I can only convince my buddy to buy my stock LS7 injectors to offset the cost a bit...

I assume the LS9 injectors are the same physical size as the LS7 ones... can anyone confirm?

[eficalibrator]

To me, it'd be easier to just use Excel, fit a trendline, and use that equation to generate values at each cell.

New flow IFR_2 at Pressure #2 (P_2) can be solved using the Bernoulli equation based on a known reference flow (IFR_1) at a reference pressure (P_1), usually 400kPa or 58psi for GM vehicles:

IFR_2 = IFR_1 * SQRT[ (P_2/P_1) ]

[MyLS1Hauls]

The ZR1 offset values worked perfectly on my modified 52 lb/hr Bosch LS2 injectors from Fuel Injector Connection. I tried the stock LS2 offset, but they were still too low, and it only had accurate values where the stock engine would operate. I like the ZR1 table because it has proper numbers in the "boost" area, so if you're running a 2 bar MAP, you will still have accurate injector offsets while in boost.

RWTD, thanks for the data...it made tuning my injectors a breeze!