Thread: Have dyno tune today 358whp 348wtq at 18psi

cams external gate and intake manifold and your at 400hp but by the time you spend that would just go t3

lol

Its garrett 743347-2. 56 trim. .86 exhaust housing. 475 hp turbo. ebay tubular manifold. the timing look almost stock to me. Taking only 6 degrees of the last 3 row of last column. No knock at all. Inlet air temperature and backpressure, only people running map base system know their intake air temp. Hardly any of them tell what their temp is. Backpressure, I only know one guy, besides turbo engineer, who monitor exhaust preturbine backpressure.. I will chnge to t3 setup next year. T3 is the same price as t28. I just want to know what so hype about gt2871r. I know a lot of people on zilvia change from t3 to to t28.

the hype is the quicker response and still making good power.

I monitor backpressure on my setup. At 29 lbs of boost i was only seeing 15-17psi of backpressure. A little too efficient which more resulted in just plain out lag. You technically want to be as close to a 1:1 ratio as possible.

With T2 turbos when you start to push them hard and at the end of their efficiency you will see backpressures as high as double or more than the amount of boost your running. Definitely something you dont want especially if you have a bigger set of cams that have alot of overlap.

With a properly sized T3 you can still get a quick spool time, keep backpressure at or under a 1:1 and it will absolutely kick a t2's butt topend all while being able to run the same amount of power but on pump gas. Win-Win situation. I ditched T2 turbos a long time ago and have never looked back. They are fun for a beginner turbo setup but if you want to make good power safely and reliably, T3.

I took my GT2860RS and put a T3 turbine housing with a vband outlet on it

http://i211.photobucket.com/albums/bb110/nx2000det/car/SSL28206.jpg

The same thing can be done with the 71r.
What I like about the housing is the GTX28's use the same housings as the *60RS and *71R

Pretty soon I will know what the difference between a t25 and a comp turbo ct4-6062 feels like. I imagine there will be a very large difference over the entire powerband.

which jpipe/o2 housing are you running? running that turbo with a divorced o2 housing will help a ton. Running it external gate should pick up 30-40whp at the same boost level. I picked up 42whp at the same boost level when I changed my gt28rs over to external gate. You also would get the added benefit of better boost control. do you happen to have a boost plot from the dyno.

I am running divorced 02 housing. No boost plot yet. I am installing gm 3 bar map sensor right now using adc input. I will log my run.

One thing I notice between t3 and t28 is torque. T28 got more torque than t3. That's tire roasting, smoky burnout and sliding torque. No wonder t3 zilvia people switch to t28.