New 1994 Twin Turbo Auto Trans, So Where to Start

[consol1]

I am looking for threads or advice from knowledgable members of this form. I just purchased 1994 twin turbo from it's original owner. I want to know what mods I should start with.

When it comes to projects this is not my first rodeo. There were some things I knew from the get go(due to my past project experiences).

First, I found a car that was completely stock and has always been serviced from a reputable toyota dealer. I have the complete history of the car and have confirmed it to be correct. Personally I never have enjoyed changing other peoples' personal project choices.

Second, I know the kind of role this car will play for me. A weekend driver! It should turn heads and make people go WOW sitting still or blazing by!!

Third, I know the mechanical role I want the car to produce.(the list is below)
1. As much WHP that can be produced on Supreme Fuel
2. As much WHP that is still useable and still dependable
3. Safe, dependable, fun, a throw your head back "Kick A Ride"!!!!
4. All the mods that make #1,#2, and #3 possible

So the problem is what is the mod list and the correct order of that mod list. I realize it will include systems that may not be related directly to the engine performance(breaks, suspension,electrical systems,etc)

Don't think about cost. I am not interested in money or cost here. I am interested in what works. In my experience people who chose a cheeper solution (because they are concerned about cost) are never truly satisfied nor does the solution work in the long run. That is not me.

I don't want people to advise me on what they have read or think would be cool. What they have seen in a mag or at a car show. I want to know from those who own, have done, and have learned what works... Please! You are the best source!!!!! You knowledge is the most valuable.

If you want to know anything about 1st Gen.Toyota 4runners, I am a guy that knows. I own 5 of them and have owned a total of 8. Built every one from the ground up. If you want to know about Cessna 172's 182's 210's 310's or Vans RV7, 8., 7A I am that guy also. I have owned, maintained and built many and still do. We all have our knowledge in different areas. I don't say this to brag but to give an example of who I want to answer this thread.

I realize there will be differing opinions and options. That is ok. I expect them and I am looking for them. I am capable of figuring out the one's that will work for me as long as people describe what they did, why they did it and what the results were.

If I have missed anything please ask. If you know of a thread that worked for you, please refer me to it. Thank you in advance for your knowledge, information, and experience.

Alan

[warmkop]

Pwpanas is the guy to ask he has help me alot with my build.
My thread is help making power 94tt.
Hopefully my car wil be dyno'd tomorrow after building 1 year.

[consol1]

Thanks! I read you thread. Good luck on the dyno. Hopefully he will see my thread and answer!

Couple of day's without a post from anyone. Maybe I got of on the wrong foot with everyone here. Sorry if I did that. I just have dropped into a new area of projects and I thought I could short cut and get to the point. Maybe my words were chosen poorly. I just want a little help of where to start with this car. Thanks

[warmkop]

The forum has been very still dont know why.Just wait a bit.
What sort off power are you looking at.
Start with a compression test

[consol1]

I am not sure. This car is completely stock with 113k miles on it with excellent maintenance history. It pulls pretty hard from 3.5 to 6.5 rpm. I am not sure where the stock power band is. I plan to take it out today and figure that out. I will take compressions tonight. I am not sure how to do a leak down test on it though. I saw a link on another thread but i couldn't find it. I know how to do that on my airplanes. and I have the calibrated gage for that. We us 80 psi which would be low for a car I am almost sure. Leak down is how you test compression for air worthiness on airplanes.

[pwpanas]

Originally Posted by consol1

Couple of day's without a post from anyone. Maybe I got of on the wrong foot with everyone here. Sorry if I did that. I just have dropped into a new area of projects and I thought I could short cut and get to the point. Maybe my words were chosen poorly. I just want a little help of where to start with this car. Thanks

No sorry I've been away on business. I'll post an answer tonight.

[pwpanas]

Originally Posted by consol1

I am looking for threads or advice from knowledgeable members of this form. I just purchased 1994 twin turbo from it's original owner. I want to know what mods I should start with…

http://mkiv.com/93-98-twin-turbo-faqs-2/#bpu1

Originally Posted by consol1

1. As much WHP that can be produced on Supreme Fuel…

What is “Supreme Fuel”? If that’s pump gas, then you need to reconsider this criteria OR forget the idea of getting a Supra. A Supra only *really* performs with high boost from the turbo(s)…and high boost on pump gas detonates. You need to consider methanol injection or race fuel if you want to experience the true performance capabilities of a 3L turbocharged engine.

Originally Posted by consol1

…2. As much WHP that is still useable and still dependable…

Sorry that’s a catch-22. The more hp you squeeze out of it, the less reliable it will be. You have to decide on your pain threshold and what you’re willing to give up for more hp.

Originally Posted by consol1

…Don't think about cost. I am not interested in money or cost here. I am interested in what works. In my experience people who chose a cheeper solution (because they are concerned about cost) are never truly satisfied nor does the solution work in the long run. That is not me.

Ok.

Originally Posted by consol1

I don't want people to advise me on what they have read or think would be cool. What they have seen in a mag or at a car show. I want to know from those who own, have done, and have learned what works... Please! You are the best source!!!!! You knowledge is the most valuable. …

I’m the owner of a heavily modified Toyota Supra Turbo and I’ve done (and re-done, and re-done) most of the work on it myself.

As I linked to above, you can either start with “BPU”, which is a good, proven set of mods. You can spend a lot of time tweaking BPU to get incremental performance improvements, but your next jump won’t be till you dump the oem twins and the oem fuel injectors and install a mid-size (~67mm) single turbo. However, there’s a big jump in cost with this step because you need a fuel system, a turbo kit, and some electronics to control it all. I can get you pointed in the right direction if you post up your thoughts on not using “Supreme Fuel” (whatever that is), and whether you think you want to make the jump straight to single turbo or if you want to try out BPU.

P.S. Agreed – I hope you did a compression test on that Supra you bought.

Here's a vid on doing a leakdown test (sorry about the ad):
http://www.youtube.com/watch?v=WgrfT0LFMhc
(it gets interesting at about the 7 minute mark for compression test, and about 13 minute mark for the leakdown)

Here's another vid (a bit more concise):
http://www.youtube.com/watch?v=ofSiT...feature=fvwrel

[consol1]

Supreme Fuel in my world is pump gas/91 octane. Thank you for the leak down videos. Did the compressions last night all between 172 and 174. That seems pretty good to me. I am under the impression 185 is the stock box number. Timing belt was just changed 6k earlier(good maintenance records on this baby).

I am shooting for the 5 to 6 hundred + in WHP. I was thinking about buying a new stand alone programable ECU with more than on map. Put the bolt on parts needed to run race fuel or 91 octane with 2 different maps.

I assumed that means the following:
Complete New Fuel System(pump/injectors/etc)
New Single turbo/manifold/etc
New exhaust down piping and all, shoot for 4"(lose the cats)
Intercooler with all piping(750 to 1000 WHP range maybe)
New radiator
Bigger Brakes
Rebuild the stock auto trans

Hold off on cams, valve springs, guides, and other internals for now.

Shoot for low 500 with the 91 octane and high 5 to low 6+ with race fuel and more boost in the map. And if I get addicted to this thing and want more.... then all I should have to do is get a bigger turbo and buy a race fuel farm(hehehe)

I have done meth injection before and still do on my 4Runner(I dropped in a 3rz with a small turbo). Not that happy with that system to tell you the truth. I fill that it is kind of a mickey mouse bandaid in opinion(not that I really have your experience in this arena) it's just more of a gut feeling.

Borg Warner has a new turbo out(within in the last year and a half). I think it has a titanium fan and is suppose to spool up quicker. I am reading and hearing roomers that by 3k it has strong pull up to 5.5K Still looking into the truth about that turbo.

So that is my starting point. I still want to use this car to drive around town when I want too. I realize that I may have to sacrifice something but I want an all around street car with some get up and freaking go!

What do you think. How far off the mark am I here?