Injectors schooling needed please

IneedAZ · 08-15-2020, 07:01 AM

My build is so close to starting as just waiting for the last few parts to show, but I would like some input before the labor starts. I don't want to pay for labor twice, so I want input if I should install 30% Injectors while it's apart. I told the shop from the beginning that reliability is number one goal. I know others have done similar builds without Injectors, but I don't want to find that I'm on the edge.

The Build: Magnuson 2650 w/103 snout, NW103, Big Gulp, BTR stage 2 cam 38% fuel, Dsx aux pump, Lingenfelter high flow check valve, American racing 2 " Headers plus engine and trans tune. 93 octane and possibly a 100 octane tune for track days.

Lastly, if I do the 30% Injectors do I have to change the high side pump?

Thanks for your input!

Joshinator99 · 08-15-2020, 08:31 AM

I’d do the +30 injectors if you want to blend in some E. If you’re going to use 100 octane, you won’t need them yet, but you’re close.

With the +38 fuel lobe, LT4 HPFP is fine for now.

Both of those go out the window if you decide to really pulley the 2650 though...

closs2sx · 08-15-2020, 09:09 AM

I have xdi 60 over injectors in mine makes 880 wheel on 13lbs of boost with a whipple and similar mods that’s on my ss 1le on my zl1 1le I am about to put a 2650 on and I will be doing similar mods and will go 60 over again so I am not limited if I go bigger in the future. 60 over was only 300 more than 30 over its kinda like 33% over vs 38% on the cam. I would do the injectors if it’s in the budget while the supercharger is off or it will cost you at least 500 more if you do it later due to labor being done twice.

IneedAZ · 08-15-2020, 09:38 AM

Quote:

Originally Posted by closs2sx

I have xdi 60 over injectors in mine makes 880 wheel on 13lbs of boost with a whipple and similar mods that’s on my ss 1le on my zl1 1le I am about to put a 2650 on and I will be doing similar mods and will go 60 over again so I am not limited if I go bigger in the future. 60 over was only 300 more than 30 over its kinda like 33% over vs 38% on the cam. I would do the injectors if it’s in the budget while the supercharger is off or it will cost you at least 500 more if you do it later due to labor being done twice.

Did u do high side pump as well?

closs2sx · 08-15-2020, 11:38 AM

Quote:

Originally Posted by IneedAZ

Did u do high side pump as well?

I have the lingenfelter big bore hpfp on the ss 1le but I don't see an issue with the lt4 hpfp. The lt1 pump had to be changed.

closs2sx · 08-15-2020, 11:41 AM

i would do the jms voltage booster as well. It will keep the voltage consistent and reduce the duty cycle of the pump. I have the dsx low side and the jms voltage booster.

Juiced1 · 08-15-2020, 09:17 PM

If you want to maximize them a pump upgrade helps. Once that high side drops off it doesn't matter how big the injector is. That being said the injectors seem to max out before the pump really drops off so there is some room to operate.

IneedAZ · 08-16-2020, 07:16 AM

Quote:

Originally Posted by Juiced1

If you want to maximize them a pump upgrade helps. Once that high side drops off it doesn't matter how big the injector is. That being said the injectors seem to max out before the pump really drops off so there is some room to operate.

Thanks for the input

IneedAZ · 08-17-2020, 11:10 AM

is there much difference between brands? Performance and quality?

KingLT1 · 08-17-2020, 11:48 AM

I would get the +30 FIC, LPE DI pump, and get a JMS for the low side. You can then turn the High Side pressure down and utilize volume over pressure which will take some strain off the low side. Then you can run E60 instead of high dollar race gas.

I like what I am hearing about FIC because they supply good data.

IneedAZ · 08-17-2020, 01:15 PM

Quote:

Originally Posted by KingLT1

I would get the +30 FIC, LPE DI pump, and get a JMS for the low side. You can then turn the High Side pressure down and utilize volume over pressure which will take some strain off the low side. Then you can run E60 instead of high dollar race gas.

I like what I am hearing about FIC because they supply good data.

Yep, i just asked the shop doing my build about doing injectors. I told them i dont want to pay for labor twice, so if borderline, lets do it now.

IneedAZ · 08-18-2020, 04:55 AM

Why the bid difference in prices among injector brands? I was looking at these for $700 vs other brands are 2500-3200.
https://fuelinjectorclinic.com/IS300-1000H

IneedAZ · 08-18-2020, 05:10 AM

Is there a high side pump that offers more than 10% increase?

Joshinator99 · 08-18-2020, 06:09 AM

Quote:

Originally Posted by IneedAZ

Why the bid difference in prices among injector brands? I was looking at these for $700 vs other brands are 2500-3200.
https://fuelinjectorclinic.com/IS300-1000H

Those must be Gen II LT1/4 injectors...they’re not DI ones. Rated at 43.5 psi...not the 2500+ psi we need.

08-15-2020, 07:01 AM	#1
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,111 View My Garage	Injectors schooling needed please My build is so close to starting as just waiting for the last few parts to show, but I would like some input before the labor starts. I don't want to pay for labor twice, so I want input if I should install 30% Injectors while it's apart. I told the shop from the beginning that reliability is number one goal. I know others have done similar builds without Injectors, but I don't want to find that I'm on the edge. The Build: Magnuson 2650 w/103 snout, NW103, Big Gulp, BTR stage 2 cam 38% fuel, Dsx aux pump, Lingenfelter high flow check valve, American racing 2 " Headers plus engine and trans tune. 93 octane and possibly a 100 octane tune for track days. Lastly, if I do the 30% Injectors do I have to change the high side pump? Thanks for your input! __________________ Sold 2012 2LT RS 12.3@112 old setup Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS. 2017 HyperBlue ZL1 A10 Born 3/17/17Delivered 4/08/17 2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. 807hp/762tq on 93 gas and 848hp/792tq on e47 Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver Daily Driver 2021 BMW M340i Xdrive

08-15-2020, 08:31 AM	#2
Joshinator99 Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 4,831	I’d do the +30 injectors if you want to blend in some E. If you’re going to use 100 octane, you won’t need them yet, but you’re close. With the +38 fuel lobe, LT4 HPFP is fine for now. Both of those go out the window if you decide to really pulley the 2650 though... __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion *1059 WHP/944 WTQ, 9.48@150*

08-15-2020, 09:09 AM	#3
closs2sx Drives: 1970 chevelle Join Date: Aug 2011 Location: Central NH Posts: 1,427	I have xdi 60 over injectors in mine makes 880 wheel on 13lbs of boost with a whipple and similar mods that’s on my ss 1le on my zl1 1le I am about to put a 2650 on and I will be doing similar mods and will go 60 over again so I am not limited if I go bigger in the future. 60 over was only 300 more than 30 over its kinda like 33% over vs 38% on the cam. I would do the injectors if it’s in the budget while the supercharger is off or it will cost you at least 500 more if you do it later due to labor being done twice. __________________ On Order 2018 ZL1 1LE Garnet Red Tint Coat Metallic MY Car 2015 Z06 Z07 Daytona Sunrise Orange Metallic Dads Car 2013 ZL1 vin 963 Crystal Red Tint Coat/Black Wheels Exposed Carbon Fiber Insert 6 Spd Manual

08-15-2020, 11:41 AM	#6
closs2sx Drives: 1970 chevelle Join Date: Aug 2011 Location: Central NH Posts: 1,427	i would do the jms voltage booster as well. It will keep the voltage consistent and reduce the duty cycle of the pump. I have the dsx low side and the jms voltage booster. __________________ On Order 2018 ZL1 1LE Garnet Red Tint Coat Metallic MY Car 2015 Z06 Z07 Daytona Sunrise Orange Metallic Dads Car 2013 ZL1 vin 963 Crystal Red Tint Coat/Black Wheels Exposed Carbon Fiber Insert 6 Spd Manual

08-17-2020, 11:10 AM	#9
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,111 View My Garage	is there much difference between brands? Performance and quality? __________________ Sold 2012 2LT RS 12.3@112 old setup Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS. 2017 HyperBlue ZL1 A10 Born 3/17/17Delivered 4/08/17 2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. 807hp/762tq on 93 gas and 848hp/792tq on e47 Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver Daily Driver 2021 BMW M340i Xdrive

08-15-2020, 09:17 PM	#7
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,663	If you want to maximize them a pump upgrade helps. Once that high side drops off it doesn't matter how big the injector is. That being said the injectors seem to max out before the pump really drops off so there is some room to operate.

08-17-2020, 11:48 AM	#10
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,826	I would get the +30 FIC, LPE DI pump, and get a JMS for the low side. You can then turn the High Side pressure down and utilize volume over pressure which will take some strain off the low side. Then you can run E60 instead of high dollar race gas. I like what I am hearing about FIC because they supply good data. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

08-18-2020, 04:55 AM	#12
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,111 View My Garage	Why the bid difference in prices among injector brands? I was looking at these for $700 vs other brands are 2500-3200. https://fuelinjectorclinic.com/IS300-1000H __________________ Sold 2012 2LT RS 12.3@112 old setup Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS. 2017 HyperBlue ZL1 A10 Born 3/17/17Delivered 4/08/17 2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. 807hp/762tq on 93 gas and 848hp/792tq on e47 Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver Daily Driver 2021 BMW M340i Xdrive

08-18-2020, 05:10 AM	#13
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,111 View My Garage	Is there a high side pump that offers more than 10% increase? __________________ Sold 2012 2LT RS 12.3@112 old setup Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS. 2017 HyperBlue ZL1 A10 Born 3/17/17Delivered 4/08/17 2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. 807hp/762tq on 93 gas and 848hp/792tq on e47 Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver Daily Driver 2021 BMW M340i Xdrive

User Name		Remember Me?
Password