Toyota 4.0 1GR-FE Engine Single VVT-i vs Dual VVT-i

[ASAD.]

25 minutes ago, Rob S said:

@Zed Im listening . . . . . . but I have the Dual VVTi . . . . . .  Should I sell to @Frederic and get an older model? haha

Well There is one out there for the dual VVTi as well 🤦🏻

[Marek]

has anyone seen dyno numbers of stock dual vvti engine? I just had a pleasure to get mine tested in preparation for upcoming mods and I am confused with how low the stock output is. Not sure if this is a dyno chart processing error or the engine is simply so underpowered (230hp on the crank / 326Nm after applying SAE norms), which means approx 139whp. The same dyno showed my 3.8 tuned Pajero was little over 270hp with 285Nm.

Pajero was nowhere near as powerful when climbing as 4runner is... so numbers don't really translate well to climb performance.

[Zed]

1 hour ago, Marek said:

has anyone seen dyno numbers of stock dual vvti engine? I just had a pleasure to get mine tested in preparation for upcoming mods and I am confused with how low the stock output is. Not sure if this is a dyno chart processing error or the engine is simply so underpowered (230hp on the crank / 326Nm after applying SAE norms), which means approx 139whp. The same dyno showed my 3.8 tuned Pajero was little over 270hp with 285Nm.

Pajero was nowhere near as powerful when climbing as 4runner is... so numbers don't really translate well to climb performance.

230 on the crank is about right >>
https://www.4runners.com/threads/dyno-numbers-2020-4-0.29688/

 

[Zubail]

1 hour ago, Marek said:

has anyone seen dyno numbers of stock dual vvti engine? I just had a pleasure to get mine tested in preparation for upcoming mods and I am confused with how low the stock output is. Not sure if this is a dyno chart processing error or the engine is simply so underpowered (230hp on the crank / 326Nm after applying SAE norms), which means approx 139whp. The same dyno showed my 3.8 tuned Pajero was little over 270hp with 285Nm.

Pajero was nowhere near as powerful when climbing as 4runner is... so numbers don't really translate well to climb performance.

Don't you think that torque was helping your 4R to perform better on climbs?

[Marek]

torque defines the power curve across the rev range, so yea - "helps", but it also shows that the car has much more power in the mid range than the Pajero... but even with that - there are other factors (different gear ratios, weight, tires, so there is no clear 1:1 relation between power and performance here as I understand it).

anyways, this engine is healthy as it should be. And probably has the stock value. I am just having problems with "dynoing" it because of several aspects, including gearbox that can't be locked in gear (thank you Toyota), so you can't really floor it on fourth gear without kickdown and the speed limit kicking in at the rev limit on fourth gear, so just before reaching the max power you get a cutoff that is related to law-required speed limit in US (105mph?). I'll be comparing gains and focus on that, rather on looking to measure it this way.