My comment wasn't really directed at you, it was a general comment.

 

actually richer in the higher rpms, you will lose power. you want a smooth 13.5 throughout the powerband, unless your FI

 

damn tek, get that thing dyno'd on sat and post it up i am very curious.

 

This might have a lot to do w/ the butterfly not openning all the way, even close a little as the rpm increases (and same amount of fuel is being injected into the chambers?). The stock ECU is running the show.

So Tek, is it Saturday yet?

 

How does that dyno compare against a 5.5 gen?

 

You do NOT want to dyno a 5AT max in 5th gear, nor is the logic correct overall. For one thing, assuming there was no speed limiter you would need to hit about 210 mph in 5th to hit redline. I don't think most dynos will even measure up to speeds that high. The second problem is that 6g Maxs are limited to I think 140 or 145 mph. At those speeds, you would not even hit 5000 rpm in 5th gear. 4th could work and might be a bit better, but it might limit out at about 6000 rpm. So that would probably make 3rd gear the best.

The goal in dynoing is to have a nice load on the engine but not so much that it takes ages to accelerate such that by the time you're at high revs the engine will be so heat soaked that it'll probably be detonating and pulling timing and you're losing a lot of power. That's one extreme. You also don't want to run in a gear that's so short that acceleration is really high because then your inertial losses are a lot higher due to power being lost to spinning up the drivetrain very quickly. That's the other extreme. You want to find the middle ground and then dyno from there. And nowadays cars have all sorts of gearing setups. Some have really short gearing and very tall final drives, others have really tall gearing but incredibly short final drives. You can't just say 1.00:1 or bust. You need to look at the specific car, its specific gearing, its specific capabilities or limitations (electronic limiters) and then choose the proper gearing from there, and it very well might not be the one that's closest to 1.00:1.

Our Highlander also has a 1.00:1 top gear, and so do older BMW 5MTs. In place of a true overdrive gear, they use very tall differential ratios to give about the same final drive ratio. You wouldnt' want to dyno any of those in 1.00:1 either because it's too tall of a gear.