View Poll Results: 3VZFE or 5VZFE
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3VZFE vs 5VZFE... Debate!!!
I haven't seen one of these threads yet so I thought I'd start one up for good information sharing. I've read up on quite a bit of information concerning both of these units. Both seem great. However, if you were to choose one, which one would it be and why? What makes your choice of engine better over the other? Which one is better for boosting? Better for N/A? I'm at a crossroads between which one I'd go with Ultimately, it will be forged and boosted in the end. Your thoughts and opinions are deeply appreciated.
all the best,
Oooo that's a tough one..3VZ is cheaper and awesome, 5VZ the fact it came out of taco.
I'd go for the 5VZ!
Still not heraldo.
the 1mz because its a million pounds lighter and will make just as much power the most powerful v6 mr2 so far has been a 1mz powered car.. especially if you're rebuilding it with forged parts, theres no reason to use anything besides a 1mz. even the 5vz guys arent pushing those things hard enough to necessitate a stronger iron block.
The 5VZ has more potential either boosted or normally aspirated than the 3VZ. There's no replacement for displacement.
5psi S/C 3.0L < 5psi S/C 3.4L (substitute whatever you'd like)
this is going pretty good so far.......
this is what i'm coming down to. from my information digging, the 3vzfe seems to have a less fussy ecu and is pretty much "in-detonable". there isn't factual scientific data that says that the heads flow better on the 3vz but from what a lot of people are saying, they do flow better. the only downfall that i see with the 3vzfe is that the manifolds make it a pain in the ass to hook up a turbo system. as well, it's 0.4 liters less than the 5vz.
further, with the 5vzfe, it has more displacement- enough said. and, the exhaust manifolds are angled in such a way that the flanges are pointing towards the transmission casing; making it easier to hook up a turbo system like on node's cars. i don't see very many downfalls with this engine other than the internals being weaker and maybe the heads not flowing as much. yet, forged goodies would replace the internals and a good porting and polishing job should do the trick.
so as of now, i'm leaning towards the 5vzfe. not sure on the ecu situation of this engine but if i'm going to take this car that far, it will be going stand-alone... and as far as i know, weasy2k is hooked up with stand-alones from hydra.
a really big negetive about both engines... the intake manifolds look like crap and would have to be thrown out in place of a custom one like node's to make it more "turbo plumbing friendly".
wiring....odds and ends
3VZ because I have one already and it's affordable.
Depends which one is cheapest....
Nah just kidding.
This is a pretty tough question because all these units have plus points and negative points.
In the uk at least the 5v is an almost impossible unit to get cheaply or to even find, however if i could find one id have it just to take a look over but i think thats a little unlikely unless i have one shipped over, so for me its a toss up between the 1mz and 3vzfe.
Either of these will be capable of high outputs if treated in similar ways.
Manifolds on both are a p.o.s including the 1mz which has some wicked edges protruding into the gasflow from the ports....the 3vz's manifolds ( especially the rear bank) have two ports that virtually exhaust into each other, no wonder these engines are strangled.
Take off all the crap parts and replace them for superior ones and i dont think youd go far wrong with either of em.
Need a "stillonthefencesmiley".
I've got a 3VZ-FE.
I'm getting a 5VZ-FE that should hopefully smash the most powerful V6-in-an-MR2 record.
I'll be putting the 3VZ-FE into my Mk2 Spider - Well, Paul Woods will be doing it!
I vote for the 5VZ because coming from the 4runner background. The 3VZ have a lot of problem with HG, and it's sooo weak (at least in the 4runner). 5VZ is also almost indestructable, and the extra torque is always nice to help propel the MR2.
3vzFE wasnt in the 4runner iirc it was only the sohc 3vz. Chalk and cheese.
Originally Posted by Forrest Gump 9
5vz all the way. More displacement is always better. I still have a 1mz with a ported head sitting in the garage because I bought a 5vz.
It really depends on what you want to do and what you're willing to do with your engine.
If you only want a stock V6 that's going to be Toyota reliable for 200,000+ miles, then a 5VZ is a horrible choice. Low redline, low horsepower, all torque. A 3VZ is better from that standpoint, but then again, it's low horsepower and low torque compared to a 1MZ. Don't forget that cast iron weighs a crapload more than aluminum.. Stock for Stock, the 1MZ (or even 3MZ) is the best choice. It's the lightest and makes the most horsepower.
If you want to run a standalone EMS with cams and some kind of custom forced induction system, then take your pick. the 5VZ/3VZ are kind of pointless unless that's your goal, in my opinion. The Brits use 3VZs because they're a lot easier to come by over there. If they had 1MZs laying around like we do, I'm sure Paul would have used those instead.
All the same, you can get rods/pistons for a 1MZ and, like Tom said, nobody is really pushing enough power through these motors to find the weakness in the aluminum block anyway. If you're out to make 500hp, why not do it with the lighter engine?
Personally, I don't want to cope with the nightmare of all that custom work and tuning right from the start.. My stock 1MZ swap fired up on the first try and only threw one CEL (disconnected vacuum line). Purrs like a kitten, no random ignition problems (*cough*distributors suck*cough), no ghetto-rigged custom crap falling off the engine as I drive it.. no oil lines popping off turbos, etc. I might mod it later on to hit an easy 250wheel horsepower.. and that's probably more than enough.
The 5VZ mad scientist projects are fun to follow along.. but how many of them even run yet? 2 or 3 that we know of? They're a lot of work, a lot of parts, a lot of tuning and are totally unexplored territory. If you want to go down that path, you should consider that very seriously.
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For my aplication it was simple. the initial cost was less, parts are less and easier to find, wiring is more simple, and my opinion is that the 3vzfe's car powerband is more suited for my car than the 5vzfe's powerband for my car.
It should be more fun to drive now and i am not trying to make 800 hp
What is an MR2?
^ yep that is a perfect example of when i would put the 3vz-fe into a car...simple and cheap!
question... what about the opposite end of that. going for that 800hp car? is there a certain unit that you'd chose over the other and why?
Originally Posted by Weasy2k
thanks for your insight
3VZGTE..NEMESIS IS COMING
Idd go with 1MZFE, it makes good power and tho its a little bit of a hassle to wire in, i think its worth the extra time. but if i had to choose from the other two, idd go with the 3VZFE reasons: Price, Avalibility, Simple and sexy lookin.
Watch this space. 800bhp maybe not... 650, almost definately.
Originally Posted by hmong337