H/C Z06 - Injector Size? HPTuner data
Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,823
Likes: 43
From: East Aurora NY
H/C Z06 - Injector Size? HPTuner data
I did some research but haven't found exactly what I wanted so I'll post here. I'll be tuning my H/C Z06 this summer and the injectors wont support > 450 rwhp. Looking for some injectors that flow enough AND have the proper data for HpTuners (and I wont have to pay for it).
#42 injectors look about right, thoughts? Suggestions? Which brand?
Thanks
#42 injectors look about right, thoughts? Suggestions? Which brand?
Thanks
Pro
Joined: Mar 2008
Posts: 664
Likes: 6
From: Kearney Nebraska
I run the 30lb SVO red tops in my 460whp H/C/I C5Z. they are @ about 88% duty cycle @ 7000rpm
Ive tuned with H/C Trans ams with the Green Top SVO 42lb/hr as well. Have the data for both that worked well for me.
Both the Red top and Green top SVO's are Ford stuff.
I have data for the Lucas 42lb/hr as well. Havent tuned with them but I have a set waiting for install on my C5Z someday
Ive tuned with H/C Trans ams with the Green Top SVO 42lb/hr as well. Have the data for both that worked well for me.
Both the Red top and Green top SVO's are Ford stuff.
I have data for the Lucas 42lb/hr as well. Havent tuned with them but I have a set waiting for install on my C5Z someday
Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Tech Contributor
Joined: Sep 2005
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From: New Market AL
Have you checked your Injector Duty Cycle 
Keep in mind, the C5s had 2 injector sizes - 24# and 28#. My '99 had the 24# and they were over 100% DC after FAST 78 intake, headers, and 226* cam.
I am now running the Ford SVO red top 30# injectors at 467 rwhp with injector duty cycles in the upper 80s. Selecting injectors is one time when bigger isn't necessarily better. You want big enough to support WOT but the smaller injectors can give better idle control. Anywhere between 30# to 42# injectors will work fine, but no need to go big if your build doesn't need it. You wont make more power with oversized injectors.
Keep in mind, the C5s had 2 injector sizes - 24# and 28#. My '99 had the 24# and they were over 100% DC after FAST 78 intake, headers, and 226* cam.
I am now running the Ford SVO red top 30# injectors at 467 rwhp with injector duty cycles in the upper 80s. Selecting injectors is one time when bigger isn't necessarily better. You want big enough to support WOT but the smaller injectors can give better idle control. Anywhere between 30# to 42# injectors will work fine, but no need to go big if your build doesn't need it. You wont make more power with oversized injectors.
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Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,823
Likes: 43
From: East Aurora NY
Thanks for the input everyone. I am leaning towards Lucas 42lb/hr injectors since i can get them locally and flow matched. Sounds like those are on the high end but I should be ok. Also thinking about the Ford SVO injectors if I can't get Lucas data.
Last edited by nullpointer; Feb 24, 2012 at 11:37 AM.
Pro
Joined: Mar 2008
Posts: 664
Likes: 6
From: Kearney Nebraska
Get the Lucas 42's I have a set of SVO 30's and they are all right but the 42 data is much better than any of the SVO Red Top data out there. A bigger injector wont hurt anything and as long as you have good data for it, the street manners will be fine too. The most important part is the DATA!!
Racer
Joined: Aug 2005
Posts: 465
Likes: 16
Those of you that have ford and lucas injectors that work perfectly, do you run a wide band?
The ford injector data doesn't so easily relate to the GM parameters. I tried Ford green tops and some Lucas and I could get them to idle pretty good but they went way rich on decel.
On the other hand, the oem injectors resized, with only the injector flow data changed worked just like they did before being resized.
How about posting up the correct injector data for the fords and lucas for the ls1/ls6 PCM if you have it?
The ford injector data doesn't so easily relate to the GM parameters. I tried Ford green tops and some Lucas and I could get them to idle pretty good but they went way rich on decel.
On the other hand, the oem injectors resized, with only the injector flow data changed worked just like they did before being resized.
How about posting up the correct injector data for the fords and lucas for the ls1/ls6 PCM if you have it?
Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,823
Likes: 43
From: East Aurora NY
Pro
Joined: Mar 2008
Posts: 664
Likes: 6
From: Kearney Nebraska
the data is on HPTforum.com Check the Tune Repository
Greg Banish also supplies the data with the Calibrated success course.
Ive ran both the Lucas and the Ford Green Tops. The data works pretty damn well for both.
Didnt have much luck on the Banish Red Top data tho. Soooooo I found some other data that works okay.
Greg Banish also supplies the data with the Calibrated success course.
Ive ran both the Lucas and the Ford Green Tops. The data works pretty damn well for both.
Didnt have much luck on the Banish Red Top data tho. Soooooo I found some other data that works okay.
Pro
Joined: Mar 2008
Posts: 664
Likes: 6
From: Kearney Nebraska
Those of you that have ford and lucas injectors that work perfectly, do you run a wide band?
The ford injector data doesn't so easily relate to the GM parameters. I tried Ford green tops and some Lucas and I could get them to idle pretty good but they went way rich on decel.
On the other hand, the oem injectors resized, with only the injector flow data changed worked just like they did before being resized.
How about posting up the correct injector data for the fords and lucas for the ls1/ls6 PCM if you have it?
The ford injector data doesn't so easily relate to the GM parameters. I tried Ford green tops and some Lucas and I could get them to idle pretty good but they went way rich on decel.
On the other hand, the oem injectors resized, with only the injector flow data changed worked just like they did before being resized.
How about posting up the correct injector data for the fords and lucas for the ls1/ls6 PCM if you have it?
Tech Contributor
Joined: Sep 2005
Posts: 1,731
Likes: 82
From: New Market AL
One way to tell if your injector data in the tune is close to being correct is to compare your MPG reading on the DIC with actual calculated MPG. After some small changes to the "redtop" data in my tune, I now have the average MPG very close. When I first installed the redtops with the stock injector data, the DIC showed way high average MPG.
