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Are Injectors necessary for EPS cam only 222/222 115 +3???

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Old 07-28-2011, 05:39 PM
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So let's just say soneone's injectors were maxed out,,,what would be a issue...if any? I'm a noob sorry.
Old 07-28-2011, 09:52 PM
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Originally Posted by Hardtop
You might want to check your duty cycle. I have the same cam and logged the car at the track. 99% duty cycle. Got my injectors re-sized by FIC. Will get them in the car soon. My car is a 2002 Z/28 that came with 28 lb injectors stock. I'm willing to bet you are out of injector.
Mine is at 85%
Old 07-28-2011, 11:14 PM
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SAE recommends a maximum of 80% duty cycle on injectors. And they are basically at that stock.
Old 07-29-2011, 12:52 PM
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My stock injectors were at 92% with EPS 226/230 and ported 241s. I just had them re-worked by FIC to 36# but I haven't checked the IDC yet. I would bet the OP would be fine with stockers.
Old 07-30-2011, 08:58 AM
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Originally Posted by jthunderz28
I personally talked to Geoff at EPS for over an hour and a half over two days and this is what he recommended even with stock manifolds considered. I'm sure I'll be fine.
Oh come on, Im in Commiefornia, and even my WIFE'S car has L/Ts!! Mine will again, when i have some cash too!!
Old 07-30-2011, 04:30 PM
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Idk why anybody would live in california if they wanted a fast modded car. I couldn't put up with alll the crap.
Old 07-31-2011, 01:46 PM
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Originally Posted by z99ls1
Idk why anybody would live in california if they wanted a fast modded car. I couldn't put up with alll the crap.
yea it sucks. and im not gonna pay 250 dollars for a smog like some do. im just building mine to pass smog and **** on all the cars that cant pass with bigger and badder setups. after my dd is good its time to build a track car anyways.
Old 08-02-2011, 01:15 PM
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Originally Posted by z99ls1
Idk why anybody would live in california if they wanted a fast modded car. I couldn't put up with alll the crap.
Well first off I don't base where I live on having a fast modded car, lol.

Second the weather in CA ***** on a lot of other states I've been to.

I can actually drive my car year round any month any day, lol. Sucks for people who live in heavy snow areas where they are totally handicapped by weather and have to put their car in storage come winter.
Old 08-02-2011, 01:22 PM
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Originally Posted by jthunderz28
Well first off I don't base where I live on having a fast modded car, lol.

Second the weather in CA ***** on a lot of other states I've been to.

I can actually drive my car year round any month any day, lol. Sucks for people who live in heavy snow areas where they are totally handicapped by weather and have to put their car in storage come winter.
Don't get me started on the weather subject Mr. Sunshine Oregon has finally just hit a nice stretch of weather. Feels good to be behind the wheel again!

I just got back from driving to San Fran and the through Calistoga and Napa. Napa and Calistoga was pretty awesome I must say. So amazing out there.
Old 08-02-2011, 05:46 PM
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Originally Posted by *02WS6TURK*
Don't get me started on the weather subject Mr. Sunshine Oregon has finally just hit a nice stretch of weather. Feels good to be behind the wheel again!

I just got back from driving to San Fran and the through Calistoga and Napa. Napa and Calistoga was pretty awesome I must say. So amazing out there.
LOL! at "Mr Sunshine", yeah Napa/Calistoga is pretty sweet to cruise through year round. We just did a cruise last year going through Napa.

Have you ever cruised through Monterey, some of the most prime real estate in all the land. EPIC!!

Highway 1 is nice too for a cruise, it's just always too damn crowded.
Old 08-02-2011, 06:55 PM
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Originally Posted by GoFastKid
So let's just say soneone's injectors were maxed out,,,what would be a issue...if any? I'm a noob sorry.
Wouldnt be able to provide enough fuel at high rpms, inj solenoids can get hot and weld themselves together and quit working (instant lean condition) causing a big boom. As mentioned here the ideal max duty cycle for most inj is 80%.
Old 08-02-2011, 07:48 PM
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Originally Posted by JRENIGAR
Wouldnt be able to provide enough fuel at high rpms, inj solenoids can get hot and weld themselves together and quit working (instant lean condition) causing a big boom. As mentioned here the ideal max duty cycle for most inj is 80%.
So you could blow your engine by not having enough injector? I just thought the car would die with not enough fuel to spark. I still have much to learn.
Old 08-03-2011, 07:30 AM
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Originally Posted by jthunderz28
LOL! at "Mr Sunshine", yeah Napa/Calistoga is pretty sweet to cruise through year round. We just did a cruise last year going through Napa.

Have you ever cruised through Monterey, some of the most prime real estate in all the land. EPIC!!

Highway 1 is nice too for a cruise, it's just always too damn crowded.
Never been to Monterey. Maybe I will check it out next time we make the drive.

My fiancee and I were in awe over the castles and winery's in Napa/Calistoga. So sick. San Fran was to much for me. There's no way I could drive my WS6 there.
Old 08-04-2011, 10:53 PM
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Results are in!!!! I just posted up everything in the Dyno Section.

Final results were 365 rwhp and 346 torque on stock injectors.

Looks like the injectors held up just fine with this cam.

http://www.youtube.com/watch?v=xi5BZiAvqM4
http://www.youtube.com/watch?v=vurTq...eature=related
Old 08-04-2011, 10:58 PM
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Nice results man! Stock manifolds too
Old 08-04-2011, 11:10 PM
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Originally Posted by *02WS6TURK*
Nice results man! Stock manifolds too
Thanks man. I think after I get it smogged in December, I'm gonna throw headers on there and retune it. Then I'll have 2 years of smog free fun

Who knows, maybe "Commiefornia" might pass the test only smog test and skip the visual inspection all together
Old 08-05-2011, 02:34 AM
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Originally Posted by Hardtop
You might want to check your duty cycle. I have the same cam and logged the car at the track. 99% duty cycle. Got my injectors re-sized by FIC. Will get them in the car soon. My car is a 2002 Z/28 that came with 28 lb injectors stock. I'm willing to bet you are out of injector.
+1 on that.

An LS1 with a smaller than 220 intake duration will go over 80% above ~5,500rpm.

Looks like the injectors held up just fine with this cam.
A two minute pull on a dyno isn't the same as holding sustained high rpm and load.

http://www.rceng.com/technical.aspx

Last edited by Sid447; 08-05-2011 at 02:41 AM.
Old 08-05-2011, 11:14 AM
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Originally Posted by Sid447
+1 on that.

An LS1 with a smaller than 220 intake duration will go over 80% above ~5,500rpm.



A two minute pull on a dyno isn't the same as holding sustained high rpm and load.

http://www.rceng.com/technical.aspx
Good point. I'm not doing any standing miles or anything but I will be running it at the 1/4 track in a couple of weeks.
Old 08-05-2011, 12:26 PM
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Man, all this talk is speculation.
Get it to a tuner and find out where your injectors are at. It wouldn't hurt monitoring fuel pressure as well.
Based on that info, then make a decision whether to upgrade or not.
I heard this, I read that is a lot of BS.



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