Solid Speed Shop for Unusual Toyota Motor Work?

Discussion in 'FH Lounge' started by DeafPaul, Oct 6, 2017.

  1. DeafPaul

    DeafPaul New Member

    Previa.jpg I have a bitchin' (if I don't say so myself) restored '92 (non-SC) Previa Van that I suspect blew it's head gasket. It's still driveable, but I need to get the engine rebuilt, or swapped. Rather than have the same performance as OEM, I'd like to step it up a bit. OK, actually I want to step it up big time, cut out the center of the van and shove in a LS motor (Previa is mid-engined) but I don't think anybody on the islands has the know-how, and can do it at a reasonable price with decent reliablity/usability in the end. Besides there's a second shaft that goes out front to drive various pulleys/fans, etc so it's just... complicated.

    Sticking with a base Previa motor seems to be the smart thing to do, but I'd like to beef it up and see if I can't get an extra 20-30 naturally aspirated reliable solid HP/TQ out of it so it can be better hooned when the urge strikes me. Anybody know of a good shop that won't look at me funny like my regular mechanic did when I asked about improving the existing, or a second motor? Somebody that's honest and stands by their work. My mechanic does not want to touch this project at all, stating he knows too little about the 2TZ-FE engine, and he doesn't even use the internet, much less have an email address or a phone that texts...

    I figure a bore job, decent head work, improved valves/rods/pistons will do the trick. Assuming parts even exist for this motor. I'm not sure I'd want to change the cam - more power at the upper end is not going to do me much good with the automatic tranny, and it's a real-world power bump I'm looking for. I already have a high-reving mental MT car that looks, and sounds like a rocket ship for my speed/cornering/poser needs.

    My former speed shop became an disappointment in service quality after spending a few grand on a previous fast car with them so I'm looking.

    Recommendations?

    -Paul
     
  2. Grumpy

    Grumpy Administrator

    That's a very interesting project. Why not get the factory sc'd motor? I bought an sc'd Previa for my sister and I thought it was really peppy! I enjoyed driving it around. With an sc, you can probably get a smaller pulley to get a little more power out of the motor. However, I'm not sure how you would handle the intercoolers and DME.

    Btw, love the green geckos on the car. lol
     
  3. DeafPaul

    DeafPaul New Member

    If I had to start over, I would have waited longer for a supercharged version despite the premium gas needs/costs and the extra moving parts that could break/screw up, but after a year of waiting and NOT ONE SINGLE SC Previa showing up on CraigsList, I said, "Screw it" and bought a very basic, abandoned one from the junkyard with 19k miles (!!!), and restored that.

    I did look into swapping it out for a supercharged motor, but it turns out it's not that simple. There are many other parts required, especially on the electronic side of things that seem overwhelming to deal with. There's also something to be said for naturally aspirated motors and their immediate response/torque. Don't get me wrong, I love me some forced induction (in fact, I had a turbo system built for a GSXR-1000 motorcycle of mine to go after a record at one point) but it doesn't seem to make much sense to try to convert the van into a forced induction van using factory bits (and there's no aftermarket system that I know of)...

    -Paul
     
  4. Grumpy

    Grumpy Administrator

    Try and PM Speedtek. I'm pretty sure he still has an account here. He did lots of import mods back in the day, and I think lots of them Toyotas.
     
  5. kev/anton

    kev/anton Member

    look at the two geckos on the van lol.
    i don't have any input except that my 4 year old loves prfevia vans. it's rare that we see them on the road and he gets just as excited to see a previa as he does a maserati.
     
    DeafPaul likes this.
  6. DeafPaul

    DeafPaul New Member

    No luck finding a Speedtek using the member search function. Tried a few other similar name combinations with no success. Thanks tho - any other recommendations?

    -Paul
     

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