twin turbos or single
 

Hey everyone i was just gonna get peoples opinions to see if it is beter to upgrade your two twin turbo or if it better to go a large single. and what would be the easiest way to make some hp

Cheers Dylan

It really depends on what u are looking for! Twins have a lot less spool time especially with the stock sequential. The beauty of that system is you use the rear turbo which is smaller up to a certain point and then the front bigger one kicks in for higher HP at high rpm with out "falling off" which for a daily driver that is a wicked setup. And they are quite durable compared to other stock turbos.

How much boost you looking to run?

A way to common mistake people make is over size there turbo and end up loosing HP they could be getting sooner due to added lag.

I personally like twins! But as u can see in my Sig on my 1j I'm running a 60-1 single. That is because 1j stock turbos are crap. And mostly cuz i drag race with the car. Also let's face it turbos are far from cheap. And if you only have to buy 1 as oppose to 2 well you get the idea

cheers for the help mate. i havnt actually got my car yet but towards the middle of the year i will be getting one. Im not actually sure how much psi to run. some people dont like to touch it and other people i have talked to have put the psi up. what would u reccomend for the size of a single turbo and how much would you run through yours. When im finished with it, it has to be able to beat a r32 gtr haha :) but i want a reliable every day car aswell

thanks

Actually both turbos are the same size. Common misconception. In fact, Toyota even produced some (incorrect) marketing literature stating that one of the two turbos is bigger. In fact, the two same-size turbos working together produces the increased amount of compressed intake airflow.

You run as much PSI as the fuel you're running will support. With 93 (R+M)/2 pump gas, that's about 16psi. Anything more will slowly damage your pistons (measurable via compression/leakdown test). With race fuel (eg C16, you can run 30psi or more).
To beat an R32, you'll need several mods, including wider tires, a fuel system with bigger injectors and multiple fuel pumps, a bigger turbo(s), and a fuel controller or aftermarket ecu. If you have an auto transmission on your Mkiv TT, you'll need to get that modded. With a 6spd, you'll need an aftermarket (eg. twin disk) clutch.

There's no good twin turbo upgrade kit I'm aware of that maintains the oem sequential operation. In general, your cheapest option ($ per hp) will be a single turbo upgrade.

Hey Phil. Can you take a look at this thread for me and give your opinion on it? I'd appreciate it.
http://www.toyota-supra.info/forums/...lp-please.html

ok cheers for the help guys. i was wondering how to beat a 32 because my brother has one haha and he rekons that i wont be able to get my power to the ground. after i get a bit more horse power (say 450hp) would it be very difficult to get my power to the ground or will it just do a huge skid

Dylan

Not with the right rims and tires. Have you ever tried MT drag slicks?

hey just read the thread, im new here and don't know if its too late but is it possible to put the two stock turbos from a 2jz-gte onto a n/a engine, as i have just bought a 94 supra and it would be good if i could do that. So is it possible and what kind of work would need to be done?