Toyota 4.0L Musings

Clutch

<---Pass
A good comparison of Tacoma vs. hilux would be a side by side picture of both trucks with the beds off to compare the frames and leaf packs.

Bet Plannerman is right, the rear half of the frame is only difference. [and spring pack] Wonder if they used the same gauge steel otherwise? (guess I could look it up...feeling lazy though)
 

Martinjmpr

Wiffleball Batter
I would imagine the Hilux probably has a steel bed, doesn't it? That's another difference vs. the Tacoma's composite bed.
 

Plannerman

Wandering Explorer
Yeah, but I don't think the bed material is a notable limit in cargo carrying capacity. If anything, the lighter composite allows more weight to be carried.
Like said above, comparing the rear frame assemblies would be very interesting. I occasionally see a Mexican registered Hilux at a neighbor's house. Next time I see it I will try to grab pics


Sent via fat thumb
 

Mrknowitall

Adventurer
Why would you want the lower rated engine in vehicles designed to tow greater loads? Emissions? Torque curve?

And then I started looking at GVWRs and GAWRs and found less clarity. So, for example, if the front end of the Taco, the later 4Runners, and the FJCs are largely the same, why do they have different front GAWRs? Why does the Taco have higher front and rear axle weight ratings, but a lower GVWR and net capacity?

OK- The main reason for the Tacoma to continue using the older engine is cost. The dual VVTi engine costs more. All the while Toyota is selling every truck for a very dear sum (lotsa profit margin)

The axle weight rating vs GVWR is from 2 things- springs and brakes. The Factory front springs are very stiff, so (while riding rougher) the front end can carry more weight than the FJ or 4Runner. With the tow package, the rear springs hold up more weight than the SUV rear axles as well. BUT.... there's always a but: The Tacoma has rear drum brakes, while the SUV have disks. All vehicles need to meet certain stopping requirements when loaded to GVW. the lesser braking system on the Tacoma can't stop as heavy a vehicle, thus lower GVW.

The next Hilux and Tacoma are supposed to share more components, including a diesel- an updated 1KD with SCR technology (yay DEF!) That, along with a DI V6 should come with the A760 transmission. Hopefully they'll keep Toyota T-case, instead of the BW unit now found in the Tundra.
 
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Martinjmpr

Wiffleball Batter
OK- The main reason for the Tacoma to continue using the older engine is cost. The dual VVTi engine costs more. All the while Toyota is selling every truck for a very dear sum (lotsa profit margin)

The axle weight rating vs GVWR is from 2 things- springs and brakes. The Factory front springs are very stiff, so (while riding rougher) the front end can carry more weight than the FJ or 4Runner. With the tow package, the rear springs hold up more weight than the SUV rear axles as well. BUT.... there's always a but: The Tacoma has rear drum brakes, while the SUV have disks. All vehicles need to meet certain stopping requirements when loaded to GVW. the lesser braking system on the Tacoma can't stop as heavy a vehicle, thus lower GVW.

The next Hilux and Tacoma are supposed to share more components, including a diesel- probably an updated 1KD with SCR technology (yay DEF!) That, along with a DI V6 should come with the A760 transmission. Hopefully they'll keep Toyota T-case, instead of the BW unit now found in the Tundra.

2nd gen Tacos have drum brakes? I didn't realize that. I guess I figured that since the 4runner and FJC have rear discs, they would too.
 

Plannerman

Wandering Explorer
Thanks Mrknowitall, very helpful. So, if the Tacoma had better breaks (front and/or rear) and improved springs, it would conceptually have a higher GVWR? I'm guessing the rear drums are also a cost-based decision? And what is the BW transfer case?
 
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robert

Expedition Leader
Probably, but it's another area where Toyota is lagging behind Nissan since the Nissans' have had discs for some time now.
 

86tuning

Adventurer
Number 3 does seem to make sense. I recall the Taco was initially introduced as a premium fuel vehicle, so perhaps early tests were based on high octane fuel.

Yes. That's the difference from what I was told. Same engine, same output, but the newer ones are rated on regular and not premium fuel.

As for the power difference between a Tacoma, FJ, and 4Runner with the same engines, I was told it is due to different exhaust. Not better or worse, just different. So a 'performance' exhaust could indeed make a few extra ponies, with the trade off being higher noise and harshness.
 

Plannerman

Wandering Explorer
Are there any reliable methods for increasing the braking capacity of the Tacos? Opinions are all over the place on Tacomaworld


Sent via fat thumb
 
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Clutch

<---Pass
Are there any reliable methods for increasing the braking capacity of the Tacos? Opinions are all over the place on Tacomaworld


Sent via fat thumb


I put crossed drilled and slotted rotors on mine, huge improvement for not too much coin. Braided lines will help with the feel too, since they don't expand like the stockers.

Could also do a disk brake conversion on the rear.

Tire choice also helps, my Cooper STT's stop better than the BFG AT and MT's did. Stickier tires tend not to last as long though. Getting roughly 40K out of the Coops...BFG's will go 60K+
 

Plannerman

Wandering Explorer
I put crossed drilled and slotted rotors on mine, huge improvement for not too much coin. Braided lines will help with the feel too, since they don't expand like the stockers.

Could also do a disk brake conversion on the rear.

Tire choice also helps, my Cooper STT's stop better than the BFG AT and MT's did. Stickier tires tend not to last as long though. Getting roughly 40K out of the Coops...BFG's will go 60K+

This is good feedback to hear. Front rotors are one the near term list, as are SS extended brake lines. There are several rear disc conversion kits, but I have found very mixed and limited feedback on effectiveness and function.
 

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