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Old February 18th, 2004, 08:45 PM   #1
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Talking Hypothetical 2004 Sienna w/various mods and "swaps" using CarTest software

This is a big shout out to everybody at www.siennaclub.org


So to those of you who traded in your musclecars for minivans, I feel for you but here is what your new Sienna could do with some various mods and swaps using CarTest software.

Step 1: Find some real-world performance data. Autosite.com has the C&D mag data for the Sienna up and the van already has some very impressive performance times of 0-60 in 7.80s and 1/4 mile in 16.20s! Not bad for a 4000+ pound van!

Step 2: Due to the lack of other real-world data, I'll just assume the above is accurate, so the next step is to get our software model of the van to match these numbers. To start off with we get a 0-60 in 8.04, and the 1/4 mile comes in at 16.43 @ 84.29, but with a miserable 2.52 60' time. Not too far off, but the van should certainly be capable of a better launch than that, especially with the torquey 3MZ-FE engine making lots of torque down low. No problem, we'll simply dial up the traction settings by 20-30%. With the increased traction, optimal launch is now calculated at an 1800 rpm brake torque, and now the software model predicts 0-60 in 7.82s and the 1/4 mile at 16.21 @ 84.39 with a much better 2.39 60' and our software model is matched.

Step 3: Lets mod this puppy and see what it can do.

5spd Manual Swap

The old Camry and Solara 1MZ-FE V6 did have a 5spd manual available back in the day and the 3MZ-FE is simply a bored out 1MZ (3.62in bore vs 3.44in with the same 3.27in stroke between them, and also the same 1.74:1 R:S ratio). So the tranny may just "bolt up" to the engine, although mounting and other manual swap issues may be another story alltogether in minivan but still within the realm of possibility, imho. The old 5spd ratios were 3.23, 1.91, 1.26, 0.92, and 0.73 with a 3.93:1 final drive. So changing out the van's 5AT for the 5MT and then dropping 60 pounds of weight (manuals are usually that much lighter), we get the following performance numbers with no other changes made to our baseline.

Optimal launch calculated as: 3000 rpm clutch dump

0-60 in 7.14s
1/4 mile: 15.70s @ 87.90 mph w/2.39 60'

As it turns out, that old 5spd gearing is nearly perfect for the Sienna. With the ratios and standard tires and the 3MZ's 5900 rpm redline, the 2-3 shift comes right at 61 mph for a good 0-60, and the 3-4 is at 94 mph. With the van trapping at nearly 88 mph, that means it can finish out the 1/4 mile still in 3rd and won't need an extra shift to 4th which costs time.


5spd manual *and* TRD Supercharger

It might be possible to figure out how to adapt the old 1MZ's TRD supercharger to the 3MZ also. Let's figure in a mild 25% increase in both power and torque. That brings the factory figures from 230hp/242tq up to 288hp and 303tq.

Optimal launch calculated: 1700 rpm clutch dump

0-60: 5.95s
1/4 mile: 14.71 @ 93.84 mph w/2.30 60'

Now we're talkin!

Just 5spd auto and TRD S/C

hmmmmmm.....

Optimal launch calculated: 1200 rpm brake-torque

0-60: 6.50s
1/4 mile: 15.19s @ 91.24 mph w/2.29 60'

That's as quick as my 5spd Maxima!


1GR-FE 4.0L 4Runner engine and 4AT swap

Not sure if this engine is a 60-degree or 90-degree design, but if it's a 60-degree it "might" fit under the hood. A 90-degree would most likely be too wide. Specs are 245hp @ 5200rpm which is not much more than the 3MZ, but torque is what matters here, and the 1GR has 282 lb-ft @ 3400 rpm. 4spd auto ratios are 2.80, 1.53, 1.00, and 0.70 with a 3.91 final drive.

Optimal launch calculated: 1900 rpm brake torque

0-60: 7.62s
1/4 mile: 15.86 @ 85.83 mph w/2.40 60'

A nice boost in performance, but the 1GR engine is hobbled by the wider 4AT gearing with shift points of 42, 77, and 113 mph going up through the gears and definitely not worth it. Of course, this engine is setup longitudinally as is the tranny for it, so this is just a pipe dream anyways.

2UZ-FE 4.7L i-Force V8 and 5AT swap

Another pipe dream longitudinal engine and tranny combo, but what the hey.

235 hp @ 5200rpm, 320 tq @ 3400 rpm, and a 5AT with much tighter gear spacings. Ratios are 3.52, 2.04, 1.40, 1.00, and 0.71 with a 3.727 final drive.

Surprisingly, this combo isn't any faster.

Optimal launch calculated: 1300 rpm brake-torque

0-60: 7.77s
1/4 mile: 15.91 @ 85.38 mph w/2.29 60'

What happened is that the 4Runner gearset is designed for the big tall tires on that truck. The Sienna has relatively tiny tires in comparison and that throws the effective final drive ratio way out of whack and the engine spends more time shifting and wheezing in the top-end than it does accelerating hard through the mid-range. Shift speeds are 33, 52, 74, and 102. Definitely not optimal. Also, since a V8 is heavier ya gotta add say 100 pounds of extra curb weight, and that was factored in also.

Summary

Swap in a manual, or try to boost the 3MZ-FE engine. Although with a high 10.8:1 compression ratio it won't be very boost friendly, but it still should be able to handle some very mild boosting anyways.
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Old February 19th, 2004, 01:18 AM   #2
 
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Very nice numbers for a minivan with these modifications . Can you do the Odyssey with M/T next? .



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Old February 19th, 2004, 02:17 AM   #3
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alotta time on your hands huh? hahah
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Old February 19th, 2004, 09:22 PM   #4
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I reposted over there:
http://www.siennaclub.org/forum/inde...pic=2497&st=0&

I got tired of converting smileys, but I go most of em
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Old February 19th, 2004, 09:52 PM   #5
 
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Quote:
It might be possible to figure out how to adapt the old 1MZ's TRD supercharger to the 3MZ also. Let's figure in a mild 25% increase in both power and torque. That brings the factory figures from 230hp/242tq up to 288hp and 303tq.
SteVTEC:
So you're sure it is possible to put the old 1mz's supercharger onto the 1mz or 3mz...? I don't know if it's true or not but I've heard in toyotanation, they said the supercharger from the old 1mz won't fit onto the newer 1mz/3mz due to the fact that it has the vvt-i. However, I did see some 4 cyl vvti using the old version supercharger even though the supercharger isn't vvti compatible, so i wouldn't know how the outcome for that car would be.

Last edited by vvt-i; February 19th, 2004 at 11:00 PM..
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Old February 20th, 2004, 12:03 AM   #6
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Steve must've been extremely bored yesterday
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Old February 20th, 2004, 09:17 AM   #7
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Quote:
Originally posted by vvt-i on February 19th, 2004 at 11:52 PM

SteVTEC:
So you're sure it is possible to put the old 1mz's supercharger onto the 1mz or 3mz...? I don't know if it's true or not but I've heard in toyotanation, they said the supercharger from the old 1mz won't fit onto the newer 1mz/3mz due to the fact that it has the vvt-i. However, I did see some 4 cyl vvti using the old version supercharger even though the supercharger isn't vvti compatible, so i wouldn't know how the outcome for that car would be.
I have no clue. This is all just hypothetical how fast would it be if..... type of stuff. The i-Force V8 probably wouldn't fit either.

I know from the Maxima world that the VQ35 guys can't fit the VQ30 supercharger because the head design is a lot bigger due to the VVT-i (Nissan calls it CVTC but it's the same thing) and the S/C shaft won't clear the heads. Or something like that. There may be similar issues on the 1MZ/3MZ VVT-i vs non-VVT-i setup also. The ToyotaNation.com, SolaraGuy.com, or CamryMan.org would all be better places to get info regarding that.
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