I have 2001 monte with 3.8L w\o supercharger. Upgraded cold air intake and alternator. Need new injectors. Best Recommendations? Stock i think is 217cc. I bought 525cc. Told that it isnt recommended. Looking for best injector to cut the lagg of v6. HELP??????

 

It isn't reccomended for a couple reasons:
-You can't just drop in larger injectors. The pcm needs to be re-tuned to enter the correct flow rate.
-There is no gain to be had as you dont really have any significant power adding mods and you aren't maxing your current injectors. If you're currently making 200 hp and the injectors are at 80% duty cycle, and you swap in double sized injectors, all you do is cut down the duty cycle of the injectors. The car will still make 200 hp, the injectors just won't open as long.

For replacements, I'd probably go down to your local junkyard if they still stock a good number of 3800 cars. Or I'd just go to rockauto / parts store for stock replacements.

What lag are you referring to? Is there something broken on the engine or are you just trying to add more power?

 

The only lag I can think of is that split second you have to wait for it to shift after stomping on the gas which can be remedied by a tuned PCM from ZZP or something.. I will say, that was quite annoying to me.

 

The lagg of power when going up hills. Traction and ABS light keep coming on...
My tuner doesn't recommend going to a 525cc injector.
I have bank 1 injector causing problems burning rich. Want to change them all with a better cc quality and tune it for a little extra power. Best known set for stock 3800 w/o supercharger.
Plan is to get ahold of a LS4 and swap. Just looking for maybe 30 hp gain . Slowing while going up hills isn't enjoyable 😂😂😂😂

 

The 3800 has more than enough torque to pull you up hills. I think you mean to say "lack" of power? Sounds like you may have an issue that needs to be addressed because what youre describing sounds like its bogging down under load. There is no better/worse quality CC. CC is the amount of fuel a particular injector can flow. For example, if you have a supercharger/turbo forcing more air into the combustion chamber then you need an injector that will flow more fuel to get the correct air to fuel ratio. Not having anything to force more air would mean a higher flowing injector will be pointless. The PCM will still give ONLY enough fuel for whats NEEDED for the amount of air the engine brings in. What mods do you have to warrant having a tuner?

I think you may be confused regarding the "bank 1 injector". I think you mean bank 1 o2 sensor which would cause a lean or rich issue. If youre having an injector problem, its either stuck open or closed or just not functioning properly which could damage the engine.

A 30hp gain is going to be a pretty big deal without forced induction which makes me ask again, what mods do you have now?

 

Thats not normal- it means something is broken.

Again, going to a higher cc flow will not gain you 1 single horsepower. Your tuner should've explained to you that your injectors are nowhere near static with your current mods. Theyve got headroom left to add more engine mods / make more power before they max out.

Just get OEM replacement injectors for the ones having the issue and be done with it. Plenty of examples of them going over 200k miles, it sounds like you just got an unlucky one.

I think something is broken if you're literally losing speed going uphill. Thats a problem with like 20-30 hp 1920s cars, not a 200 hp modern car. The code for the injectors and the flashing lights seem to reinforce that. Id get the issues fixed before you start modding it.

30 hp isn't a trivial amount of hp to add NA. The stock cam NA records are around 190 whp (which is about a 30 hp gain). But these guys had rockers, ported heads, and one even had raised compression (9.9:1).

IMO if your plan is a LS4 swap, just put all of your mod money into that bucket. NA 3800s just don't take well to mods.

 

Everything I have read, I concur, just get stock injectors. Going with bigger injectors will not net you any gains other than bragging rights for something you don't need. This struggle getting the car to travel up hill, reminds me of issues people talked about with clogged catalytic converters. Start with the easy issue, if you have any check engine codes, work to resolve those. Which sounds like you might have some codes. If you need advice about those codes, feel free to post the codes themselves. Outside of that, I stand by the recommendation, use factory spec injectors.

 

Traction and abs is from a hard missfire, and as everyone has said, upgrading will gain you nothing. If your heart is set on an upgrade, and plan to go ls4, buy 8 l67 injectors (36 lb about) and use 6 on this, and when you go ls4 you can transfer them over and use them+ the other 2. Get them from a good source no ebay or amazon. You will need to get adapters for the plugs.

 

One other thing to think about for your long term plans - what is your goal with the LS4 swap? If you're just shooting for stock LS4 power levels (or even bolt on ls4 power levels) a turbo kit for your current engine would easily get you there with a fraction of the cost / labor / headaches.

If that's the case, you could swap straight to 60# injectors now to start chipping away at the cost of that upgrade.

A bit of a tangent to the thread, but figured it was worth a mention.

 

Thank You All.. Will see about getting codes removed. Bought ABS Harnesses and Will return injectors to Fuel Injectors Clinic and get some regular injectors. Any Idea what the best size or CC ect injectors I should get for this Engine????? Thank you again. ( Told Abs and traction light would restrict the power from transmission and bank 1 burning rich i think could mess with the power and cause the idle change at cold start.??)