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Converting 4Cyl to 6Cyl

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Old 11-09-2011, 08:24 AM   #1
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Converting 4Cyl to 6Cyl

Is it possible to convert my 4x4 4cyl 5 speed to a v6? Just pull the engine and use the same transmission? It would be possible wouldnt it?
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Old 11-09-2011, 08:25 AM   #2
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why not just add 2 cylinders?
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Old 11-09-2011, 08:29 AM   #3
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Anything is possible. But it would be better(easier) to grab the trans out of the donor truck while you are at it.
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Old 11-09-2011, 08:29 AM   #4
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How involved is that and bout how much will it run me?
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Old 11-09-2011, 08:35 AM   #5
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Anyone know of a guide or heard of anyone else doing this?
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Old 11-09-2011, 08:37 AM   #6
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lol everything is going to depend on what parts you get and need for what price and what problems you run into, your going to have much better luck asking this on ttora as well, and I say stick with 4cyl. mpgs.
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Old 11-09-2011, 11:30 AM   #7
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Quote:
Originally Posted by yota14 View Post
Is it possible to convert my 4x4 4cyl 5 speed to a v6? Just pull the engine and use the same transmission? It would be possible wouldnt it?
You would not be able to use the same transmission. The 4cyl 3rz use a w56 model where as the v6 uses the r150f.
To make the v6 work you would need to use the r150f tranny with the v6 ecu and wiring.

As far as cost you are probably looking at 2k easy. It is all the little stuff that gets you; slave cylinder, clutch, flywheel, etc. As far as time, if you need a guide.....well plan on some(probably 3-4 weeks if dedicated) down time as it is not a plug and play operation.
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Old 11-09-2011, 04:09 PM   #8
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Toyota trucks have the reputation they do because of their legendary 4-bangers. Now why would you wanna go and throw that all away?
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Old 11-09-2011, 07:22 PM   #11
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You could Turbo it instead.

The 3rz motor's internal parts can withstand about 400hp

http://www.lceperformance.com/Street...-p/1071030.htm
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Old 11-09-2011, 07:36 PM   #12
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just weld on 2 more cylinders. problem solved
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Old 11-09-2011, 07:38 PM   #13
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Quote:
Originally Posted by BeerHat View Post
You would not be able to use the same transmission. The 4cyl 3rz use a w56 model where as the v6 uses the r150f.
To make the v6 work you would need to use the r150f tranny with the v6 ecu and wiring.

As far as cost you are probably looking at 2k easy. It is all the little stuff that gets you; slave cylinder, clutch, flywheel, etc. As far as time, if you need a guide.....well plan on some(probably 3-4 weeks if dedicated) down time as it is not a plug and play operation.
a R150F is a better transmission anyway.
the W56 is an OK transmission..but anything R series is win.
Especially R151..bigger output shaft and input shafts.

a stock 5VZ weighs in the vincinity of 460lbs,
a stock 3RZ weighs 370lbs.

3RZ- 150hp, 177lbs of torque
5VZ- 183hp, 217lbs of torque

For what you get, it's a small jump over a 3RZ..but not worth the hassle or time..
1UZ is a better swap IMO.

a stock 1UZ weighs about 385lbs..and it's a proven built motor.
261hp, 268lbs of torque

VVTI version: 290hp,300lb of torque

Not to mention those things will rev to 9K with the right valves,springs and lifters...not that you need to rev them to 9K. lol.
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Old 11-09-2011, 08:27 PM   #14
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just a quick note. the 3rz in the first gens use a w59 manual tranny, not a w56
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Old 11-09-2011, 08:31 PM   #15
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Quote:
Originally Posted by racerxtaco View Post
just a quick note. the 3rz in the first gens use a w59 manual tranny, not a w56
It's pretty much the same transmission to be honest.
2WD W59's are pieces of shit.

I've never dicked around with a 4WD version.
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Old 11-09-2011, 08:43 PM   #16
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Correct, w59 for early 4x4 tacos. I was thinking w56 with a w59 bellhousing to mate up gear driven tcases like i did on my 85 crawler. The two wheel drive is the w55 for hilux, w58 for 2wd tacos. As far as saying the w56/w59 is crap, is well.....crap. they are strong, and very logical choice for toy crawlers. Is as strong as a r151 turbo or v6 r150; obviously not, but the price to strength ratio doesn't really make the turbo/v6 more attractive. For using a stock tcase, w59 is fine.

Op, I would leave your 3rz in, it is a very tough motor and the performance gains for doing the swap to me is not worth it.
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Old 11-09-2011, 09:00 PM   #17
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that's why I have a broken w59 in my garage right?
the 2wd one's are PIECES of shit, as I stated in my previous post.

W56s are common uses,for toy pickups..but a r series is a better tranny IMO..w series are easy to find..
I have a W series currently actually..a 56 C, with a gear case..it's a great combo..but R series is definetely better, and a 151 has a 4.31 first gear..way better for your money.
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Old 10-05-2012, 12:16 PM   #18
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Glad I checked

Good thread, minus the BS. I was also considering a swap in my 97. I need to be able to pull something larger than a kiddie cart. I thought the 3.0 might work. The 2.7 is worn out and needs OH so I considered a swap instead but that is apparently too involved. Sounds like a vehicle swap is in the mix. I do so like the 3RZ mileage (until lately) though. 160K miles and only needed new exhaust valves @ around 110K because I pulled too large a load.
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Old 10-05-2012, 12:29 PM   #19
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Good thread, minus the BS.
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Old 10-05-2012, 12:32 PM   #20
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Quote:
Originally Posted by yota14 View Post
How involved is that and bout how much will it run me?
Not being a dick but, rule of thumb is usually that if you have to ask that question, then you really shouldn't try to do it yourself.

However if you can find someone who has done it before or knows exactly what they're doing, then I say go for it
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