k1114

(A note in advance: I am working out my own setup on paper - I am not interested in a kit, and I do understand the real costs involved)

I've been trying to work out the airflow requirements and turbo sizing for the 2AZ-FE. Here are the specs I have on the engine:

* 2362cc / 144.14 cubic inches
* 88.5mm (3.5") bore
* 96.0mm (3.8") stroke
* 9.8:1 compression ratio
* 6500 RPM redline
* Max HP at 6000 RPM
* Max torque at 4000 RPM

Now I've done the math by hand, and used a handful of online calculators, and everything seems to tell me this:

* The stock engine has a maximum airflow requirement of 217-228 CFM
* At 6 PSI and 220 HP (my goal), I need to provide a maximum of approximately 350-405 CFM (the calculations fluctuate a lot based on A:R and VE)

I've looked over TONS of compressor maps; both OEM turbos (my preference as I'd like something very reliable) and aftermarket performance minded models. So far everything is pointing towards a T3/T04E hybrid 50 trim. What other possible matches are there? Anyone built a lower boost setup with something else?


Edit: one more question - all the exhaust manifolds I've seen available for this engine are T3; anyone seen a different flange available?

GUNNIST14

iTrader: (1)

k1114 as you are I also prefer to build my own kit with all quality parts. Your calculations look correct. 6 psi is a preferred starting point for everyone here. The t3/t4 as they are referred to are decent and most can achieve 350hp with no sweat and are reliable.

You need to decide what A/R raitio you would like for the comp and turbine housings. 0.50A/R and 0.48A/R are quick spooling and great for low-end response. A 0.60A/R and 0.63A/R also spool decently but depending on your turbo manifold(LOG STYLE OR TUBULAR STYLE) will hit higher in the rpm range. Precision make 4834 or 4854 which are good for 360-385 hp. Every turbocharger can be reliable as long as you keep up with the maintenance and have a sound and solid setup.

T4 flanges obviously flow more air but on 1.8- 2.5 engines the boost response won't be good hence the hybrid T3/T4 quick spool and ability to create high horsepower.
Decide what A/R ratio's you prefer and then compare different turbos and make your choice.
Also your exhaust system needs to be at least 2.5 inch's from the downpipe to rear section of the exhaust any less and you will choke the turbo and loose performance.
Hope we helped out feel free to ask any other questions.

p.s. my personal turbo is a PTE 6169E 0.60A/R COMP SIDE AND 0.63A/R TURBINE SIDE this turbo is rated at 655hp respectively give or take. It's going on my stock engine soon so I can have an idea of how it performs and where is begins to build boost and how long it can maintain boost before I built a seperate engine with rods and pistons and etc... the horsepower rating is high but the A/R ratio is adequate for a good street turbo.