V6 and V8 TQ curves

[bulldog]

Thought you guys migh find it interesting to see the TQ curves of the engines. Unfortunately I have not been able to track down the V8 VVTi's curves yet. If anybpdy has it please post up or send it to me.

V6
http://www.toyota120.com/GenDocs/V6%20TQ%20curve.jpg

Non VVTi V8 (03-04 models)
http://www.toyota120.com/GenDocs/V8NonVVtiTQcurve.jpg

[Mikestang]

There's something inherently wrong with both those graphs... you couldn't measure HP and torque at low rpms & full throttle while in 4th gear (man.) or 5th gear (auto). They must be extrapolated down below like 3k. Cool none-the-less.

[Bluto]

For the 05 Tundra. Shouldn't the TQ and HP cross at 5250 rpm? I think Toyota plots the graphs to look nice.

[Mikestang]

What's special about 5250 rpms?

[Bluto]

(Torque x Engine speed) / 5,252 = Horsepower

If you expand and align the torque values and plot to match the HP, the two plots should cross at 5252.

[bulldog]

There's something inherently wrong with both those graphs... you couldn't measure HP and torque at low rpms & full throttle while in 4th gear (man.) or 5th gear (auto). They must be extrapolated down below like 3k. Cool none-the-less.

These are measured at the enigine directly, not a chassis dynometer. The most accurate way to determine what the engine gives you. With chasis dynos it is virtually impossible to get accurate readings for the low end.

[bulldog]

For the 05 Tundra. Shouldn't the TQ and HP cross at 5250 rpm? I think Toyota plots the graphs to look nice.
Thx, pretty much as I expected. The same till around 2k RPM and then slightly more TQ. The big difference is the more gradual drop off after 4k RPM thus the added HP. You can actually feel it if you drive the 2 different engines a lot.

[Mikestang]

These are measured at the enigine directly, not a chassis dynometer. The most accurate way to determine what the engine gives you. With chasis dynos it is virtually impossible to get accurate readings for the low end.

Ahh, gotcha, engine dyno.

[bulldog]

I just though it would be interesting for folks to see. Both engines have very good, low to mid range torque curves. What you need in a truck. Even the V6 has 220 lb-ft just over 1000 RPM.

[Vegas Runner]

That is very interesting. It is always hard to find torque curves. Where did you find these?

[bulldog]

I got the ones I posted from Toyota literature. Collected over time. The V8 was fromthe initial 4R launch material, while the V6 from the FJC launch m,aterial. The VVTi V8 I dunno.

[Bluto]

The VVTi V8 I dunno.

I have a couple of "TOYOTA TUNDRA — NEW FEATURES" pdfs. Got them on the internet somewhere.

[bulldog]

Just to add to the conversation.

Here are the Toyota specs for the 03-04 V8, 05 V8 and 03-05 V6. Also added is the appendix with the updated numbers due to new SAE standards from 06+.

Note in the appendix the altenator output, which translates to basically a 130A altenator for all models (checked older versions as well).

Hope you guys enjoy the info.

[AlexJet]

Thanks Andries. Useful information.

[Teotwaki]

Just to add to the conversation.

Here are the Toyota specs for the 03-04 V8, 05 V8 and 03-05 V6. Also added is the appendix with the updated numbers due to new SAE standards from 06+.

Note in the appendix the altenator output, which translates to basically a 130A altenator for all models (checked older versions as well).

Hope you guys enjoy the info.

Ooooh..... 130 Amps? That is kick butt. No need to ever upgrade. The stock alternator in my big old Bronco is 90 AMPs max.

[bulldog]

Ooooh..... 130 Amps? That is kick butt. No need to ever upgrade. The stock alternator in my big old Bronco is 90 AMPs max.

They state 1560 Watts for the altenator, so at 12V it is 130A. If they use 13.8V for the rating it is 113A and 14.8V it is 105A, none of these make a lot of sense. Teh Altenator fuse is 140A anyway. So I would say it is safe to bet 120-130A for the stock altenator.

[Teotwaki]

They state 1560 Watts for the altenator, so at 12V it is 130A. If they use 13.8V for the rating it is 113A and 14.8V it is 105A, none of these make a lot of sense. Teh Altenator fuse is 140A anyway. So I would say it is safe to bet 120-130A for the stock altenator.

Agreed! I had exactly the same train of thought.