Fueling Advice Mag2650

scantone · 09-28-2020, 10:40 AM

I purchased a Mag2650 with the stock size pulley & a 103mm inlet/throttle setup the other day. My current setups as follows

DSX low side
RPM +32%cam
Lingenfelter Direct Injection High Flow Fuel Pump Check Valve
-6an from factory tank to Y
-6an from DSX pump to Y
-8an from Y to high side pump
Ported Heads
Valves, springs, retainers
Kooks 2" headers
Kooks Full Exhaust
No Cats
9.17 Lower Pulley
Standard Rotofab

While it's down, I figured add a RotoFab Big Gulp. My question is, should I add some injectors or any other fuel items while the chargers off? I'm not looking to set any records with this thing, just a fun street car (zl1 1le m6). I live in Florida, and IATs where a problem with the stock 1.7 charger. 93 octanes the goal, but I do have a station with e85 down the road from me.

IneedAZ · 09-28-2020, 10:54 AM

Guess will depend on your hp or track goals. Mine went into the shop today for similar mods except 38% fuel lobe cam. I will be doing 93 and 100 tunes. I have to believe that 800-875rwhp is more than enough and dependable for me.

IneedAZ · 09-28-2020, 10:55 AM

Where in Florida are u?

supersportss · 09-28-2020, 10:57 AM

Fuel supply line seems kinda small.

Joshinator99 · 09-28-2020, 11:03 AM

Quote:

Originally Posted by supersportss

Fuel supply line seems kinda small.

Two -6 feed lines to one -8 is plenty...

scantone · 09-28-2020, 11:05 AM

Quote:

Originally Posted by IneedAZ

Guess will depend on your hp or track goals. Mine went into the shop today for similar mods except 38% fuel lobe cam. I will be doing 93 and 100 tunes. I have to believe that 800-875rwhp is more than enough and dependable for me.

800 - 900 on 93 no meth id be extremely happy.

Tarpon Springs

Mines already in the 800 range (RPMs 865 kit plus lower pulley). I'm just trying to keep it a bit safer with the new charger.

IneedAZ · 09-28-2020, 11:13 AM

Quote:

Originally Posted by scantone

800 - 900 on 93 no meth id be extremely happy.

Tarpon Springs

Mines already in the 800 range (RPMs 865 kit plus lower pulley). I'm just trying to keep it a bit safer with the new charger.

Ok, I'm in Wesley Chapel. Your reason is exactly why I went 2650. With our hot humid weather I wasn't comfortable pushing the 1.7 very hard. Most who have done same build are 800-840 on 93 and 860-900 on 100.

KingLT1 · 09-28-2020, 11:51 AM

If you want to run E then +30 FIC injectors.

SFV1LE · 09-28-2020, 03:07 PM

I've heard that adding the DSX is not an adequate solution for a track car (circuit) due to fuel starvation. When the fuel level is under 1/2 tank and the car pulls high Gs on track, the DSX line may be unable to draw fuel as the fuel moves away from the pickup. At this point you only get fuel from the OEM pump.

Do you plan to use this setup in your ZLE on track?

scantone · 09-28-2020, 03:19 PM

Quote:

Originally Posted by SFV1LE

I've heard that adding the DSX is not an adequate solution for a track car (circuit) due to fuel starvation. When the fuel level is under 1/2 tank and the car pulls high Gs on track, the DSX line may be unable to draw fuel as the fuel moves away from the pickup. At this point you only get fuel from the OEM pump.

Do you plan to use this setup in your ZLE on track?

I've read that as well, but honestly, not a concern at this moment. I located the fitting as low as it could go and into the corner. You could always just add a second fitting and T the 2 together if you had this problem.........

SFV1LE · 09-28-2020, 03:48 PM

Quote:

Originally Posted by scantone

I've read that as well, but honestly, not a concern at this moment. I located the fitting as low as it could go and into the corner. You could always just add a second fitting and T the 2 together if you had this problem.........

Yes I like that idea. Another option may be to tap the tank with a fitting that has a male -6 AN end on the inside to connect another fuel line inside that side of the tank and connect a Holley Hydramat that covers most of the tank bottom--fewer lines and better coverage. I think both sides of the tank have an access port on top to reach inside for work like this. But I'm not sure about tank access.

Juiced1 · 09-28-2020, 10:21 PM

800-850 on 93 is pretty doable on the factory high side and injectors. We've done that a bunch. 900 on meth or 100 octane.

laynlo15 · 09-28-2020, 10:38 PM

Having had a 2650 and working for Magnuson in the past you made a good choice. I think you'll find that 800 to 850 is plenty. Once you've driven it with that much HP you may agree. I wouldn't run that much power on the street without a drag radial, lots want to run r888 but its not going to rein in that power.

Juiced1 · 09-29-2020, 08:57 AM

Quote:

Originally Posted by laynlo15

Having had a 2650 and working for Magnuson in the past you made a good choice. I think you'll find that 800 to 850 is plenty. Once you've driven it with that much HP you may agree. I wouldn't run that much power on the street without a drag radial, lots want to run r888 but its not going to rein in that power.

That's the truth. Just had a customer pick up his 900rwhp car and he had the stock street tires on there. I told him those are no longer safe as they wouldn't hook on anything under highway speeds with warm temps. I run a Toyo RR on the shop car and still spin them on a punch from 60. Yet they were still sticky enough to push through the front brakes (they were still locked) on a burn out the other day.

09-28-2020, 10:40 AM	#1
scantone Drives: 18 Z1E - 18 Raptor - 17 Jeep SRT Join Date: Dec 2019 Location: FL Posts: 82	Fueling Advice Mag2650 I purchased a Mag2650 with the stock size pulley & a 103mm inlet/throttle setup the other day. My current setups as follows DSX low side RPM +32%cam Lingenfelter Direct Injection High Flow Fuel Pump Check Valve -6an from factory tank to Y -6an from DSX pump to Y -8an from Y to high side pump Ported Heads Valves, springs, retainers Kooks 2" headers Kooks Full Exhaust No Cats 9.17 Lower Pulley Standard Rotofab While it's down, I figured add a RotoFab Big Gulp. My question is, should I add some injectors or any other fuel items while the chargers off? I'm not looking to set any records with this thing, just a fun street car (zl1 1le m6). I live in Florida, and IATs where a problem with the stock 1.7 charger. 93 octanes the goal, but I do have a station with e85 down the road from me.

09-28-2020, 10:54 AM	#2
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,110 View My Garage	Guess will depend on your hp or track goals. Mine went into the shop today for similar mods except 38% fuel lobe cam. I will be doing 93 and 100 tunes. I have to believe that 800-875rwhp is more than enough and dependable for me. __________________ 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

09-28-2020, 10:55 AM	#3
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,110 View My Garage	Where in Florida are u? __________________ 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

09-28-2020, 11:51 AM	#8
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,800	If you want to run E then +30 FIC injectors. __________________ 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

09-28-2020, 10:38 PM	#13
laynlo15 Drives: 2022 Lt1 A10 Join Date: Nov 2015 Location: clark, mo Posts: 8,860	Having had a 2650 and working for Magnuson in the past you made a good choice. I think you'll find that 800 to 850 is plenty. Once you've driven it with that much HP you may agree. I wouldn't run that much power on the street without a drag radial, lots want to run r888 but its not going to rein in that power. __________________ 2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff

09-28-2020, 10:57 AM	#4
supersportss Drives: 2019 SS Join Date: Apr 2020 Location: North Texas Posts: 259	Fuel supply line seems kinda small.

09-28-2020, 03:07 PM	#9
SFV1LE Drives: 2018 Hyper Blue ZL1 1LE Join Date: Dec 2018 Location: CA Posts: 1,360	I've heard that adding the DSX is not an adequate solution for a track car (circuit) due to fuel starvation. When the fuel level is under 1/2 tank and the car pulls high Gs on track, the DSX line may be unable to draw fuel as the fuel moves away from the pickup. At this point you only get fuel from the OEM pump. Do you plan to use this setup in your ZLE on track?

09-28-2020, 10:21 PM	#12
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,663	800-850 on 93 is pretty doable on the factory high side and injectors. We've done that a bunch. 900 on meth or 100 octane.

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