Anyone know where to find the Technical Specs of the GS350's 3.5?

I'm curious, the 2GR-FKS in the GS 350 is 311hp, 280 ft lbs of Torque. Compared to our meager 278/265, that's quite a jump. The compression ratio is unchanged at 11.8:1 per lexus's website but I'm curious to know if there are other tech specs (cam info?) where we might see differences that would have made for an increase in 33hp and 15 ft lbs. Are we possibly just a tune away from those same power levels? The only difference I'm seeing published on their basic specs pdf is that the Tacoma is obviously tuned for 87 whereas the GS is 91.

If it's really just the tune, I suspect there will be a hell of a market for whoever is first to develop a programmer with OTS map or tuning software.

 

I will gladly fill my truck with 91 or 93 octane if there is a tune available for giving me 33hp and 15 ft lbs. Given time there will be if they motor is the same? Keep digging to find out how the two engines are different please.

 

I smell transplant...subb'd

 

That's how them luxury cars squeeze out some more power. Tune/higher octane. Nothing really much more to it.

 

Squeezing to me would be 4 or 5 hp. Or even less. 33hp and 15ft pounds are pretty big numbers for just a tune and some gas. Thats like a mild supercharger

 

You'd be surprised.

I owned an Audi S5 with a 3.0L supercharged that was rated at 333 crank. The cheaper model in the UK, the A5, same exact engine but down tuned to 268 HP. In the US they used a 2.0L engine.

My point is, the Tacoma the engine is used for efficiency. The GS is for luxury performance. It's easy for them to down tune these things.

 

It does look though that the GS350 has acoustic control induction system. Which is similar to what some Porsche engines do. It varies the length of the intake manifold for various situations = mo powa

 

I suppose one more obvious reason for the power differences may be redlines.

Tacoma using 87 octane: 278 @ 6000 RPM, 265 @ 4600 RPM
Hilander user 87 octane: 295 @ 6600 RPM, 263 @ 4700 RPM
GS350 using 91 octane: 311 @ 6400 RPM, 280 @ 4800 RPM

So, same octane, making more power in the Hilander, but making it above what our redline is so it's possible that everywhere under redline in our trucks, the difference is negligible. The HP gap in the GS could again be greatly attributed to higher RPM, with the real net differences in tune being the torque increase. Having more horsepower above 6000 rpm is not really usable for us.

 

Well they're going to post the highest HP rating. If the Tacoma was tuned to make 311 HP, Toyota is going to post it as 311 HP @ 6400 RPM. The redline could be moved.

The RPM that it makes the most power isn't necesserially the redline.

 

Right, but ours makes peak power at redline, so it makes sense that it would continue making power if they'd chosen to increase it. Not sure why they'd have reduced the redline in our trucks...towing?

 

Honestly, do we really want to push the envelope in the name of extra power and torque if it means a diminished reliability?

I'd gladly keep my meager 278hp/256tq for having the engine go 500k miles+.

 

You just took the words out of my mouth. People get too hung up on peak hp/torque #s. It's where in the rpm range that those peak #s are generated that are important. On a truck....the lower the better

 

Well in the case of an 87 vs 91 octane tune, there isn't really a risk for diminished reliability. I'd gladly take the 91 tune to get an extra 15 ft lbs if that's what the real potential for gain is. An extra 5-10 bucks a week at the pump is just fine by me.

 

what's the point of accessing more power if it's still available only above 3500? i don't get it. i shift at 3500, 4k at about the highest.

if i want a tune of some kind (AND I DO!!) then i want more power lower, like the direct injection kick we get at 3500 down at say 1800rpm... holy cripes i'd be happy with that. this is the single complaint i have of the truck.

 

Could be that Toyota wants the taco to have less hp to not kill the Tundra sell?

 

Different intake, exhaust and front dressing (water and power steering pumps on Taco are probably heavier) would account for 33hp very easily. Plus lower redline in the Tacoma.