Searched: Are L92 injectors the same as LS3?
No they're different. L92's are 31lb and LS3's are 41lb or 42lb I can't recall exactly but they are quite different in flow rates. Otherwise they are the same type of short injector. EV1 iirc is what they are called.
That blows. I guess it means that the L92 injectors I have hear are relatively worthless. Why would they increase the injector flow rate 33% when horsepower is only 8% more in the LS3?
exactly what I was wondering when I discovered that. If you go to performancetrucks.net there's lots of info on the L92 and that's where I found out about the injector differences. Who knows?
so there it is. Makes sense to me. My guess is that other trucks share the 30lbers and that's why the L92 gets them. I've also noticed that there's a lot of redundancy with some gm systems when crossing the truck/car platforms. I don't think the truck side of things commuinicate very well with the car division and vice versa. Seen a lot of these little differences when researching my L92 build
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Verdad Gallardo Very difficult to simply say x amount lb injector supports x amount of peak hp. The only way to know is to log the duty cycle of the injector once its running through a tuning suite like HPtuners or efilive etc.
That said as a ballpark? 30lb injectors will support 350rwhp pretty easy. Some guys get them to support over 400rwhp but it all depends on the comments noted above. There really is no other way to know.
If you follow the big engine builds that go on especially the boosted guys. Typically they go through a few sets of injectors before finding the perfect match for their system as picking the right size is a bit of a shot in the dark. One can "dumb down" this process like when you buy a complete turbo or supercharger kit that is designed to work well, but peak power is typically FAR below what can be had if you maximize the same components with all the supporting pieces and tune it accordingly.
That said as a ballpark? 30lb injectors will support 350rwhp pretty easy. Some guys get them to support over 400rwhp but it all depends on the comments noted above. There really is no other way to know.
If you follow the big engine builds that go on especially the boosted guys. Typically they go through a few sets of injectors before finding the perfect match for their system as picking the right size is a bit of a shot in the dark. One can "dumb down" this process like when you buy a complete turbo or supercharger kit that is designed to work well, but peak power is typically FAR below what can be had if you maximize the same components with all the supporting pieces and tune it accordingly.
If your running an L92 truck harness and then swapped to an L76/LS3 intake and shorty style injector then yes they plug right in
DING DING DING!!!!!!!!! CAM YOUR THE MAN
[/quote]Im glad someones a fan... I've been pissing off more people lately than putting smiles on their faces.
I feel like Tom Cruise against Col. Jessup sometimes when I question some info in other threads.... "You cant handle the truth!!!!" but it is simply the truth I seek. Plus i wanna keep as much of my dough in my pocket as I can hence why I search like mad, post like mad, hunt for every last detail of everything I do. Gotta pay one way or the other its time or money.
Plus I like to give back when I can. i wrote the sticky on how to swap LS1's into third gen Camaros over at thirdgen.org etc. No one payed me for it, I just did it because I could never have done the swap in the first place without the support from all the message boards!
So I made someones day. Maybe one day you'll do the same
Good luck on the build dude
Teching In
Joined: Mar 2009
Posts: 33
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From: prescott az
L92 injector swap ? Ok, so i am using, at least for now, the L92 manifold on a L92 with a cam change [ no VVT] and long tubes in a 2200 pound hot rod with TKO 600 tremic and am asking myself do I need to change the injectors. I am using a aftermarket harness with a MEFI Burn ecu and it starts and runs but has not yet been driven and I plan on a dyno tune. I have been told this combo should make 500---525HP at the crank and probably 20% less at the wheels. Sooo what do you think ? I am always curious as to what information I might learn, so let it fly.
well I'm no injector sizing expert but in my experience I'd say it's going to be close. The good news is go get the dyno tune with the stock injectors the tuner will be able to tune it with them and log the duty cycle. If they turn out to be too small it's a simple scaling adjustment to swap out to a bigger set afterwards. Only thing that would make this plan flawed is of it's difficult to reconnect with your tuner at another date to tweak te tune for the bigger injectors. I think I'd get LS3 injectors they're common and cheap. eBay etc
L92 and LS3 injectors are not physically the same size
https://ls1tech.com/forums/fueling-i...l#post18860871
I'm currently trying to swap in a set of LS3's into the shop Escalade (418/L92 ~600hp) and this thread popped up. Hopefully this saves someone else from thinking they are a direct swap as I was told from PCM of NC. Certainly not the case.
Anyone know FIRST HAND NOT INTERNET FORUM PARROTING what spacers I need?
https://ls1tech.com/forums/fueling-i...l#post18860871
I'm currently trying to swap in a set of LS3's into the shop Escalade (418/L92 ~600hp) and this thread popped up. Hopefully this saves someone else from thinking they are a direct swap as I was told from PCM of NC. Certainly not the case.
Anyone know FIRST HAND NOT INTERNET FORUM PARROTING what spacers I need?
