Hey guys me again, you may remember my small thread about finding engine info. Well now I've Found my specific engine but I can't find any specs online for it. I have found datasheets for tuning and debugging but I really want the specs of my engine. Where would I find this info, anyone know? If anyone wants to know it's a 3.4 L LNJ. Thanks!
The 3.4 L LNJ is a 204-cubic-inch (3,350 cc) modified version of the normal 3400 engine. It includes a modified intake manifold, oil pan, engine cover, and fuel system as well as electronic throttle control. It is built in China and imported to Canada for use in the Chevrolet Equinox and Pontiac Torrent. The LNJ makes 185 hp (138 kW) and 210 lb·ft (285 N·m).
What specs are you looking for? Kind of a vague question you're asking.
I'm looking to find the maximum pressure (psi) that my engine (stock) can take at the intake manifold, so the boost pressure it can take.
You won't find specs like that. In fact, even engines that run boost, I've never really found specs like that for them.
Should be able to handle as much boost as you can put in, until the bottom end or head gasket gives way. If not, then it's a horrible design for an engine. And being a GM 60-degree V6, I know that isn't the case.
Are you planning on turbocharging? If so, you're perfectly fine. I'd be more worried about what the bottom end could handle. Manifold pressure is pretty much whatever you can pump into it, if an intake manifold can't handle 10, 20, 30 or even up to 40 PSI of boost, I wouldn't really deem that safe to even use on a vehicle, seeing as how that's a fairly low number in comparison to other things, such as fuel pressure (Generally around 50PSI).
[editline]19th June 2011[/editline]
tl;dr, you're looking for a pointless spec. The intake can handle any boost you throw at it. Worry about your rods, pistons, sleeves, crankshaft.
3.4 L
185 hp
lol
[QUOTE=abcpea2;30557308]3.4 L
185 hp
lol[/QUOTE]
it's an SUV to boot.
[editline]19th June 2011[/editline]
[QUOTE=bradley;30557196]You won't find specs like that. In fact, even engines that run boost, I've never really found specs like that for them.
Should be able to handle as much boost as you can put in, until the bottom end or head gasket gives way. If not, then it's a horrible design for an engine. And being a GM 60-degree V6, I know that isn't the case.
Are you planning on turbocharging? If so, you're perfectly fine. I'd be more worried about what the bottom end could handle. Manifold pressure is pretty much whatever you can pump into it, if an intake manifold can't handle 10, 20, 30 or even up to 40 PSI of boost, I wouldn't really deem that safe to even use on a vehicle, seeing as how that's a fairly low number in comparison to other things, such as fuel pressure (Generally around 50PSI).
[editline]19th June 2011[/editline]
tl;dr, you're looking for a pointless spec. The intake can handle any boost you throw at it. Worry about your rods, pistons, sleeves, crankshaft.[/QUOTE]
Excellent, thanks! At the same time that gives me more open ends, for future reference how do I go about finding the limiting factors of my current setup?
[QUOTE=bradley;30557196]tl;dr, you're looking for a pointless spec. The intake can handle any boost you throw at it. Worry about your rods, pistons, sleeves, crankshaft.[/QUOTE]
Doesn't it depend a lot on what kind of compression it's running as well? Like if you were running 9:1 you can put it under more pressure than if you were running 12:1 for example? I'm probably wrong, just wondering.
Well, not entirely. If you talk to people, a lot will say low compression is better, a lot will say high compression is better. There's really no middle ground. I know if I was running boost I'm like to have under 10:1.
[editline]19th June 2011[/editline]
[QUOTE=Aw_Hell;30557363]it's an SUV to boot.
[editline]19th June 2011[/editline]
Excellent, thanks! At the same time that gives me more open ends, for future reference how do I go about finding the limiting factors of my current setup?[/QUOTE]
I'm not sure you understand entirely, the limiting factors you are looking for aren't limiting factors at all. You need to invest in forged rods and pistons, preferably dished. Have a valve job done on the heads, or replace the valves and springs with stronger ones. Find someone who makes a forged crank (if at all possible). Find someone who makes head studs.
If all else fails, find a shop that will sleeve your block. Stronger sleeves are the best way to go for forced induction, but when you get into stronger sleeves you're looking at boost in the 30-40 PSI range, so you definately won't be driving that on the street unless you're a master tuner and can keep it in control.
Basically, you're going to be spending tens of thousands getting any high power numbers out of that motor with turbocharging, so you're better off not doing it at all. If I'm correct there are companies that make cams, high performance valvetrain things, and various hotrod bits for the 3400.
Any way you look at it, you'll end up with 200-250 horsepower after spending a grand, two grand, maybe three. Really not the best "soup up" engine out there.
[QUOTE=bradley;30564266]Any way you look at it, you'll end up with 200-250 horsepower after spending a grand, two grand, maybe three. Really not the best "soup up" engine out there.[/QUOTE]
Yes, I agree. I would not waste the time and money for the maybe 50-100 hp increase.
For any GM engine, I don't recommend a turbo anywhere unless you do what Bradley said.
[QUOTE=Aw_Hell;30556999]I'm looking to find the maximum pressure (psi) that my engine (stock) can take at the intake manifold, so the boost pressure it can take.[/QUOTE]
Psi=/=airflow
Stop what you're doing and spray it, blow it up in a less expensive way
[QUOTE=edberg;30589055]Psi=/=airflow
Stop what you're doing and spray it, blow it up in a less expensive way[/QUOTE]
He didn't ask for airflow though, he's wondering how much boosts he can has before he blows the welds on his cast intake manifold.
He doesn't want his laptop flashing the "DANGER TO MANIFOLD" warning at him.
But yeah, what Edberg means is PSI isn't important, airflow is.
Also, yes please, just spray a 250 shot and kiss it goodbye. Do it on the dyno so we can see how much power it makes since it'll only do it once.
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