How many folks have ran a T4 turbo and how horrible was the spool? Im kind of on the fringe of needing to go to a T4 hotside due to how big of a turbo I need for my new goals With the 6262 and .63 housing I made full boost around 4300-4400rpm, Im just looking to see if anyone here has ran a T4, what were the specifics of the turbo, how much boost, and what rpm did it reach full boost? The car is running a 7600rpm limiter, so I would honestly be fine with it if it would make full boost by 5k, I just dont know if thats realistic or not, I havent really been able to find anyone who's used a T4 on the 2AZ.

 

Unrelated but what are you going to do with all of that power?

A Precision 6266 will make 725 and is available in a T3

 

Have fun with it lol The goal now is to make 700+, dont even really know why at this point, but I think ive found some things to make it work well for what I want, using boost by vss and boost by gear together on the ems I found I can bring the boost in close to perfect and manage wheelspin pretty well. With the M&H DOT tires I think itll be able to put down even more of the power. Before I tried to push it to far on limited injector, I had it out on Dunlap Star specs making some 60roll pulls with the highest boost level being 29psi making 610whp and it put it down nicely. It basically runs gate pressure (about 18.5psi) until 50mph, at 50mph in 2nd gear it ramps to 20psi at redline, in 3rd it ramps up to 25psi by 75 and full boost comes in around 95. This will never be a drag car or any type of organized racing car. Its just my fun toy I just love the thrill of driving it. Oh and in the south, theres alot of 600-1000+hp cars that love to roll race ;) Hell we even have legit airstrip events centered around 60 rolls

As for the turbo, after having to deal with Precision's customer service, I really dont want to run a Precision turbo, unfortunately other than something custom, it looks like theyre the only ones with a T3 hotside that would work for my power goals. In fact a dbb 6266 is exactly what I was looking at before all my bad experiences with Precision. Maybe there dbb turbos are more durable and dont burn oil like there journal bearing?

 

Wouldn't hold my breath.

 

I would consider having a stack of transmissions on hand for that power. I still don't see how people claim 500+ yet don't break transmissions!
Id stick with a Garrett, t3 foot http://www.atpturbo.com/mm5/merchant...Category_Code=

 

Big #'s there...we need a Dog Box!

 

2 years now at 500hp
70k miles total

 

I think its all about what you do with the car. Also the big keys are eliminating wheel spin and wheel hop as much as possible along with a tapered boost curve that prevents a large torque shock on the trans. The only time I had a trans go purely due to power was when I was making mid 500's and tried to drive the car on some ____ty street tires, it spun 3rd and 4th hard, in 4th it spun till like 7200rpm than hooked and the gear went boom from the torque shock

 

Also had no idea Garrett made a GT37 in a T3 hotside, that's seeming like a good option...

 

I would max the 6262 before upgrading. That turbo has a lot of potential.

 

What tires are you running now? Size?

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So i still have the 6262 but no matter what Ive done, the damn thing smokes. It has a 3/4" drain with no traps or kinks in it, plenty of crankcase ventilation, and its even been rebuilt by Precision once, at my expense I should add. So im pretty much giving up on it.

As for tires, the street tires (long dist trips, etc) are 225/45/17 Dunlap Direzza Star Specs. Funny thing is, they perform as well if not better than the BFG Drag Radials I ran before in the same size. They spin mildly in 3rd but very manageable making 24psi in 3rd. The only time the car has ever seen over 600whp is at 90+mph, which tends to hook fine. The key is the way the boost ramps in.

The fun tires will be M&H 235/60/15 DOT Street/Strip - I have them, but havent even had them mounted on my 15's yet. They prob wont be ran until next year. Honda guys have pretty good success getting these to hook large amounts of power even with as light as their fwd cars are. Well see once I get to play with them once the cars back together The goal is to hook close to 600whp in 3rd, a few cars I ran I feel I couldve beat when it was making 600 if I had more power on the hit.

 

what feed line are you using

 

At first it was a -4, but Ive since also tried it with a .065 restrictor, didnt make a difference either way.

 

Have you tried a -3

 

To be honest I havent, but I feel the -4 with a .065 restrictor should be close to the same.

 

Off topic quick question. thendawg, what socket do you use to remove the headstuds? The service manual calls for a 10mm Bi-Hexagon socket. Tried ordering one but Toyota is out of stock on them, which is amazing giving the cost of one.

 

You can get them at Autozone and Oreilley. Its called a 12 point internal wrench. Whats funny is although Toyota calls it a 10mm, in the sets you get from Oreilley or Autozone, its actually the 12mm one. Heres a link to one from autozone...

http://www.autozone.com/autozone/acc...fier=2357_0_0_

 

Cool thanks man.

 

Is the turbo ball or journal bearing? If ball bearing need an oil restricter.

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