title basically says what im after. does anyone have any constructive advice for turbo shopping?

goals are 350hp on stock ports and quick spool

 

For 350hp you'd be better off with a 12A in the car

 

So I can be more like you?

 

^ LOL! For some reason when installing a 20b, the assumption has always been for it to make max power. Power isn't everything and I wish some people would get that through their heads. The stock twins will do just fine at that level. If you want quicker spool...then I would go with a GT35r. This would be an insane midrange turbo for a 20b with the potential for more later. Depending on A/R size they can still make up to 500WHP (maxed out) on a 13b. The larger displacement of the 20b will only make it spool faster. If 350 is all you really care about, then just get the smallest A/R available or stick with the twins.

 

But seriously, any refreshed twin rotor 12A or 13B will do that number at 10psi and 7000rpm.

That is stockport + highflow FC turbo territory. Not $20000 engine swap to be slower than a factory car

 

If he has 350whp then he wont be slower than the factory car.

 

It's never going to make financial sense if you only try to justify the swap and base it on cost vs hp. We all know it's much cheaper to do what your suggesting. But seriously, if that's what he wanted then this thread would be in the 1st or 2nd gen section. That's his choice! For what he wants it wont cost nearly that much if you do the swap yourself. Plus the potential is endless once the engine is actually in the vehicle.

 

this is the turbo that i am looking at. suggestions on the turbine housing though? .84 or 1.00 ar divided or i could get the .96 undivided.

http://www.atpturbo.com/mm5/merchant...Category_Code=

 

I shot you a PM, basically saying go with the .96 on the 20B as well as some other options.

~S~

 

I am right now in process of installing my 1.06 A/R GT35R on streetported 20B, hopefully will have some results soon, whenever it works or not....

Its for my driftcar and spool and low-end response is the reason for switching from 13B to 20B and keeping same turbo....

 

I can't wait to see how responsive that combo will be. Will you have dyno info? I wanna see how much torque will be made down low.

 

thats what im building it for too. drifting is my hobby, torque is my friend. post the numbers when you get done..

also as i read on, i missed a very critical component in my turbo selection.. this particular turbo is not water cooled. does anyone think that this will be an issue or do you guys know of any suitable and similar turbos that have a water cooled cartridge?

thanks again

 

Yes, i will try to get it dynoed, but it might be in 2011.
It will take me some time to break engine in and tune it.

 

The stock twins should easily make 350 bhp.. Give them around 15 psi boost and you will se that youre close to the 400bhp mark with the twins..

Singleturbo, go for the turbonetics t-66.. this is what i have in my racecar.. realy quick spool up.. i have full boost around 3k, and works great up to 8k when i starts to surge.. this will easily give you good 350 bhp's... and still good for around 500 if you want later..

 

rear turbo on the stock twins is hammered. compressor is full of oil.

how would a garrett gt4088 work out? im a little worried that the turbine side is a little big on it at 1.19 but there is a decent used one that is in my budget.

 

Never tried a garrett gt4088 before, but should be a lot better on the spool up than a gt42 that someone uses on those engines.. The turbo is better for outtakes around 500-600 hp i think. not for 350... the gt 35 with a bigg exhaust turbine might be the thing for you, but then you should have no smaller than a 60mm wastegate to contoll it.. anything else will be to small to be able to bypass the amount of exhaust from that engine...

 

I have the stock twins kicking around if you just decide to replace your bad turbo let me know. To start on my setup I have a t70 with a 1.15 at if I remember correctly. I should be getting back to this project shortly. Ill let you know how it works out if I finish anytime soon.

 

The stock twins will be the best for his setup.. 14psi with stock twins and you will have around 350-400 bhp

 

Just by optimizing the fuel/air/ignition maps in your standalone, the stock 20b twins at the stock 10psi should get you to 350 pretty easily. As most already know, a 300hp 20b is VERY underworked and 350 is still quite underworked too. For my build, a stable engine at the stock 10psi is the goal. With some luck, it'll be somewhere around 350hp and have torque to match. In one of the threads about getting them to work sequentially with a haltech, someone mentions that the FD twins can spool up to 15psi by 1700rpm when on a 13b, netting that FD around 350 at the wheels. I'd imagine that a 20b with its twins could spool up as quick or better.