7th Injector?

aflatau · 05-14-2012, 02:25 AM

Has any one ever thought about running a 7th injector to our car? Since our fuel system seems to have a limit with big power..

I have a few friends who have Cobolt SS' that have the GM's LNF motor. From what I have heard and minor research I have done.. These motors are some what similar to the n54. Direct Injection, cam driven fuel pump, turbo charged and etc.. They also have similar restriction's as we do - the biggest is the fuel system being tapped out. So what I've found out is they add a standard fuel 5th injector to there car right before the throttle body I believe.. correct me if I am wrong.

So if any one out there has any comments about this or theory how this might work.. post up.

zerep1 · 05-14-2012, 07:05 AM

yeah basically like meth injection but with fuel a cheap fix.. the right thing to do would be a new intake manifold with secondary port injection or figure out a way to upgrade the current pumps since i believe the current injectors are not maxed out yet

JamesM3M5 · 05-14-2012, 07:35 AM

HPF already has a manifold with 6 more port injectors if you want more than the 644RWHP of the Vishnu kit. Even there, the Vishnu single is still running with plenty of fuel with what we speculate is just a low pressure delivery pump upgrade on stock injectors and stock HPFP. Yes, he does run a good bit of methanol, but still under 1500cc/min for cooling of the intake charge. High IATs will kill a high boost motor just like high AFRs.

anerbe · 05-14-2012, 08:01 AM

wonder if such a 7th injector would help with the carbon build-up...

bryce · 05-14-2012, 09:30 AM

Quote:

Originally Posted by JamesM3M5

HPF already has a manifold with 6 more port injectors if you want more than the 644RWHP of the Vishnu kit. Even there, the Vishnu single is still running with plenty of fuel with what we speculate is just a low pressure delivery pump upgrade on stock injectors and stock HPFP. Yes, he does run a good bit of methanol, but still under 1500cc/min for cooling of the intake charge. High IATs will kill a high boost motor just like high AFRs.

great points

JamesM3M5 · 05-14-2012, 10:05 AM

Quote:

Originally Posted by anerbe

wonder if such a 7th injector would help with the carbon build-up...

That's what Lexus does on their DI motors - they have extra port injectors to wash the valves off under certain driving conditions. Or at least that's what I've heard.

aflatau · 05-14-2012, 10:12 AM

Great points every one , with the port injection - that sounds like a good idea. As far as meth - I am just trying to avoid the meth discussion and find an alternative more solid solution.

bryce · 05-14-2012, 10:38 AM

^e85

Jeff@TopGearSolutions · 05-14-2012, 10:48 AM

Quote:

Originally Posted by bryce

^e85

But E85 requires up to 30% more fuel, dont forget

bryce · 05-14-2012, 10:49 AM

Quote:

Originally Posted by Jeff@topgearsolutions

But E85 requires up to 30% more fuel, dont forget

read the latest vishnu e85 thread

Jeff@TopGearSolutions · 05-14-2012, 11:46 AM

Quote:

Originally Posted by bryce

read the latest vishnu e85 thread

I have but I'm not sure its relevant to someone looking to avoid hitting a fuel limit if they are already hitting a fuel limit on pump gas. It still doesn't get away from the fact that e85 alone requires up to 30% more fuel. So if one is hitting a fuel ceiling then e85 would not be the answer is all I'm saying as it requires more fuel then regular pump gas.

zerep1 · 05-14-2012, 11:51 AM

i havnt heard of anyone actually hitting a fuel ceiling

aflatau · 05-14-2012, 12:34 PM

lol I know all about the e85 stuff - use a 60/40 mix on my car.

05-14-2012, 02:25 AM	#1
aflatau First Lieutenant 54 Rep 327 Posts Drives: XM Join Date: Mar 2012 Location: Buffalo, NY iTrader: (1)	7th Injector? Has any one ever thought about running a 7th injector to our car? Since our fuel system seems to have a limit with big power.. I have a few friends who have Cobolt SS' that have the GM's LNF motor. From what I have heard and minor research I have done.. These motors are some what similar to the n54. Direct Injection, cam driven fuel pump, turbo charged and etc.. They also have similar restriction's as we do - the biggest is the fuel system being tapped out. So what I've found out is they add a standard fuel 5th injector to there car right before the throttle body I believe.. correct me if I am wrong. So if any one out there has any comments about this or theory how this might work.. post up. __________________ 24 XM(Current) 22 X540i(Sold) 21 M5 Comp(Sold) 07 Single Turbo 335i(one of the first, sold)
	Appreciate 0 Tweet Quote

05-14-2012, 07:05 AM	#2
zerep1 Lieutenant 40 Rep 462 Posts Drives: 335i E90, 328i F30, 230i G42, Join Date: Nov 2010 Location: Tampa, Florida iTrader: (1)	yeah basically like meth injection but with fuel a cheap fix.. the right thing to do would be a new intake manifold with secondary port injection or figure out a way to upgrade the current pumps since i believe the current injectors are not maxed out yet __________________ Irub
	Appreciate 0 Quote

05-14-2012, 07:35 AM	#3
JamesM3M5 Some dude 91 Rep 1,780 Posts Drives: E92 335i Join Date: Sep 2011 Location: Northern VA iTrader: (0)	HPF already has a manifold with 6 more port injectors if you want more than the 644RWHP of the Vishnu kit. Even there, the Vishnu single is still running with plenty of fuel with what we speculate is just a low pressure delivery pump upgrade on stock injectors and stock HPFP. Yes, he does run a good bit of methanol, but still under 1500cc/min for cooling of the intake charge. High IATs will kill a high boost motor just like high AFRs. __________________ RRT E92 335i/6MT with stuff and things
	Appreciate 0 Quote

05-14-2012, 08:01 AM	#4
anerbe Lieutenant Colonel 121 Rep 1,568 Posts Drives: Red E90M 6MT Join Date: Dec 2006 Location: BH, MI iTrader: (2)	wonder if such a 7th injector would help with the carbon build-up...
	Appreciate 0 Quote

05-14-2012, 10:12 AM	#7
aflatau First Lieutenant 54 Rep 327 Posts Drives: XM Join Date: Mar 2012 Location: Buffalo, NY iTrader: (1)	Great points every one , with the port injection - that sounds like a good idea. As far as meth - I am just trying to avoid the meth discussion and find an alternative more solid solution. __________________ 24 XM(Current) 22 X540i(Sold) 21 M5 Comp(Sold) 07 Single Turbo 335i(one of the first, sold)
	Appreciate 0 Quote

05-14-2012, 10:38 AM	#8
bryce Banned 103 Rep 3,177 Posts Drives: zhp 3-pedal Join Date: May 2010 Location: texas iTrader: (22) Garage List 2005 bmw 330ci zhp [7.34] 2008 bmw 135i- sold [6.00] 2007 bmw 335i- sold [7.14]	^e85
	Appreciate 0 Quote

05-14-2012, 11:51 AM	#12
zerep1 Lieutenant 40 Rep 462 Posts Drives: 335i E90, 328i F30, 230i G42, Join Date: Nov 2010 Location: Tampa, Florida iTrader: (1)	i havnt heard of anyone actually hitting a fuel ceiling __________________ Irub
	Appreciate 0 Quote

05-14-2012, 12:34 PM	#13
aflatau First Lieutenant 54 Rep 327 Posts Drives: XM Join Date: Mar 2012 Location: Buffalo, NY iTrader: (1)	lol I know all about the e85 stuff - use a 60/40 mix on my car. __________________ 24 XM(Current) 22 X540i(Sold) 21 M5 Comp(Sold) 07 Single Turbo 335i(one of the first, sold)
	Appreciate 0 Quote