Will upgrading injectors on a bone stock LS1 make any difference?
waste of money. ls1 injectors are good unit you get to a decent size cam and light head work. the car will not benefit now by adding bigger injectors as the stockers werent maxed to begin with. not only that but any injectors you buy will require a dyno tune to not wash the cylinders with fuel
To further dive in to what these guys are saying, injectors don't make power on their own. They are a supporting mod, so if you're making alot of power other ways (forced induction, valvetrain work) then those would help deliver the required fueling for that power.
Sure a boosted application might gain power by switching to bigger injectors, but that is not necessarily because of the injectors creating more power...it's allowing the rest of the combo to work at it's full potential.
Sure a boosted application might gain power by switching to bigger injectors, but that is not necessarily because of the injectors creating more power...it's allowing the rest of the combo to work at it's full potential.
To further dive in to what these guys are saying, injectors don't make power on their own. They are a supporting mod, so if you're making alot of power other ways (forced induction, valvetrain work) then those would help deliver the required fueling for that power.
Sure a boosted application might gain power by switching to bigger injectors, but that is not necessarily because of the injectors creating more power...it's allowing the rest of the combo to work at it's full potential.
Sure a boosted application might gain power by switching to bigger injectors, but that is not necessarily because of the injectors creating more power...it's allowing the rest of the combo to work at it's full potential.
In short, the only notable difference it will make on a bone stock car is a reduction of the cash in your wallet.
Not to hijack, but its sorta the same question, how upgrading the stock injectors on a LQ4 to the SVO redtop injectors?
I'm getting ready to do a cam/springs swap but still use the truck intake and I thought about swapping out the injectors (yes i know about the rail heights and pigtail differences)
thanks,
I'm getting ready to do a cam/springs swap but still use the truck intake and I thought about swapping out the injectors (yes i know about the rail heights and pigtail differences)
thanks,
The hard part abut getting an engine to make power is moving air, fuel is the easy part. Don't need to worry about getting more fuel in till airflow has exceeded what the fuel system can feed. AIRFLOW is where power comes from. You pump excess fuel into an engine beyond what it needs and not only can you hurt power but you can wreck and engine is you get too stupid.
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Agree with everyone on here. Many guys run stock injectors on cam only, and even some heads/cam builds. Only time you need bigger injectors is if the engine requires more fuel because of added airflow/horsepower.
Staging Lane
Joined: Feb 2014
Posts: 92
Likes: 0
From: Seguin Texas
Definitely a waste of money. Unless you are making serious and I mean like 600+rwhp it's dumb plus they will fuel wash cylinders and cause a big headache. Plus as a side note most engines love to be starved of fuel. Don't mistake this for it being Ok with bad fuel components. It's just if you atomize fuel meaning a wide light spray your engine will run harder and make small et gains
This.
Additionally, my stock bottom end 346 with headers, aluminum intake manifold, and 228/236 112 comp cam were hitting 100% duty cycle at 5800 rpm, but that's with WOT afr at around 11.4 IIRC. Shouldn't have been tuned that rich. But, that gives you one example of how far stock injectors will take you in that scenario.
Additionally, my stock bottom end 346 with headers, aluminum intake manifold, and 228/236 112 comp cam were hitting 100% duty cycle at 5800 rpm, but that's with WOT afr at around 11.4 IIRC. Shouldn't have been tuned that rich. But, that gives you one example of how far stock injectors will take you in that scenario.
This.
Additionally, my stock bottom end 346 with headers, aluminum intake manifold, and 228/236 112 comp cam were hitting 100% duty cycle at 5800 rpm, but that's with WOT afr at around 11.4 IIRC. Shouldn't have been tuned that rich. But, that gives you one example of how far stock injectors will take you in that scenario.
Additionally, my stock bottom end 346 with headers, aluminum intake manifold, and 228/236 112 comp cam were hitting 100% duty cycle at 5800 rpm, but that's with WOT afr at around 11.4 IIRC. Shouldn't have been tuned that rich. But, that gives you one example of how far stock injectors will take you in that scenario.
If any of you have actually seen the duty cycle on an fbody with stock injectors and just headers you wouldnt be so quick to dismiss larger injectors. Of course it all varies on the WOT afr you are targeting, but anything over 85% can go wrong pretty quick. Esp with the failing fuel pressure in the upper RPMs of the stock pumps.
They may not make power on their own but they can sure help. Most people are building on a "budget" but alot of times that is not very realistic. Fuel is the main part that will make or break an engine/combo. Having a safety margin at the very least is alot better than riding the jagged edge. Resizing injectors is not very expensive. We have it done quite often.
They may not make power on their own but they can sure help. Most people are building on a "budget" but alot of times that is not very realistic. Fuel is the main part that will make or break an engine/combo. Having a safety margin at the very least is alot better than riding the jagged edge. Resizing injectors is not very expensive. We have it done quite often.
cospeed, are you talking about resizing my stock injectors? how large can you make my 99-26lbs ? at what rwhp should i do this? aprox how much do you charge ? do i have 2 mark my injectors to match them with the same cylinder when i get them back or are they interchangable? thx
They are flow matched so it will not matter which hole they go back in to. The charge depends on size and style of inj. We normally resize the ls1s to a 36# or 42#. That gives you plenty of room to work with. It is hard to say at what exact rwhp to upgrade them at as every individual car is different. We have seen header only cars need them and then we have seen some with a cam only still at a manageable duty cycle. We would recommend anything engine wise be accompanied by upgrading the fuel system. Either pump or injectors or both. With the youngest of the fbodies being 12 years old and the newer influx of ethanol blend fuels, they normally need a refresh anyway.
If you want more info you can shoot us an email.
Thanks
coloradoSPEED
If you want more info you can shoot us an email.
Thanks
coloradoSPEED