Oscar8404

Hello members, I'm about to purchase a 20B Motor and start the conversion process. Currently i have a Turbonetics T62-1 Turbo i would like to know if i may use this turbo on the 20B Single Turbo Conversion or would it be to small. Also i'm planning on doing either a streetport of bridgeport on the motor. So this will change the size of turbo that is needed. I do know that a lot 20B's are using T88 and such sized turbos. I'm farly new to posting so please be gental Well gang peace out.

Oscar

ReZ311

iTrader: (4)

What's the A/R trim on it?

MARTIN

nice car, looks like my IC.

t-von

iTrader: (8)

We need to know your hp goals. FIY Just because a lot of people run a t88 doesn't mean it's a good average choice for your application. Personally I'm going to run a turbo just large enough to reach my hp goals but at the same time small enough to give me the response I want in the low end. Lag sucks! I'll take a nice broad power band over peak power any day of the week.

Turbo 3

iTrader: (3)

what's your turbine A/R? You will need something around 1.15 or 1.32 even with a big turbo like a t-72,76, or GT45,60,70 series.

sillbeer

You won't need a bp 20b to spin up a greddy t88. Thats what I have on my 20b fc and there isn't such a thing as lag. I still have stock ports and the driveability is great however it does drink alot of gas.

-Destin

teachermechanic

iTrader: (4)

I have 62-1 with .70 and 1.15 A/R on my 20B (R.B. street port secondary only).
With this turbo it's not possible for me to make more then 5 Lbs. in first and second speed.

MARTIN

lol then obviously there is something wrong, either with your turbo or manifold design. I make about 8 psi in first and full boost as soon as I hit second.. 2 rotor, stock ports..On a full size t70

sillbeer

His turbo is to small. Thats whats wrong. His motor flows to much air for that turbine.

-Destin

MARTIN

Seeing the compressor map, this turbo flows 62lbs/min at 17psi. What does it have to do with him building boost?

sillbeer

He didn't post his compressor map or give any other specs on it.

-Destin

Oscar8404

Sorry for answering late just started school again. Where can i find the A/R i don't have the box iy came in. And i was always referred to the T62-1 no other info. When i bought it i was told the turbo is good for 750Hp. I'm not the much of a technical guy i usualy pay people to think for me in that aspect. My HP goals is over 600 but run low boost of about 400 or so and 600-750 on high boost. I will post pics or any other info you guys might need to help out. Thanks

Oscar

I found this hopefully it will help.

MARTIN

that turbo is 550max or according to that coleman guy, 480

MARTIN

he said 62-1, so I went with a garret one, which happens to be the one he posted.

teachermechanic

iTrader: (4)

It's possible for you, but for the 20B i thing the compressor wheel is to small. I need to spin more rapidly for go with rpm.
Or i check for put 1.00 A/R.
Anyway at 5Lbs. it same power with my 2 rotor at 12Lbs.

sillbeer

I would have to think that the 62-1 would be worse off on a 20b than the stock twins running parallel. And forget it if your thinking about porting the motor.

-Destin

ReZ311

iTrader: (4)

I'd do a T66 or T78. hotside trim in the 1.32. My personal pick is a T88.

sillbeer

Turbonetics or greddy? There is quit a bit of difference.

-Destin

ReZ311

iTrader: (4)

Turbonetics of course. I try to not use greddy products as they cut corners when the manufacture things.

Oscar8404

Well thank for all the info guys. But i belive that i get more of you guys trying to say to get a bigger Turbo. I do like turbonetics turbo's. But i would realy like to now any one with a street port or bridge port on a 20B. I mite have to due a poll to to LET THE PEOPLE DESIDE WHAT SIZE I SHOULD GO. Basically what would you like to have or what would you like me to get for my setup. Plus it would be in a FD so space is an issue when you go big. Well thanks for all and hope to here more info.

Oscar

ReZ311

iTrader: (4)

Why not start off with the stock seqentials and go from there? I would not bridgeport the 20B. A nice streetport would do just fine.

Oscar8404

ReZ311 thanks for the info i spoke with my engine builder and he highly encouraged me to do a Large Street Port. So that's what i'm going for. And for the sequential turbo's i pretty much want to build it to it's fullist and not have to worry about upgrading later. Plus to be honest i did not like to seq turbo's one turbo is good for me.

sillbeer

If you want to build this to it's fullest potential check out auto-illusions thread. He's building a 1000rwhp bridgeport 20b fd. Nothing on it seems to be left out. Is that what your looking for? I seriously doubt it'll be much fun to drive on a regular basis. With some more tuning i'll easily be over 600rwhp with a greddy t88. With a small streetport and a t76 you'll see over 700rwhp with ease.

-Destin

CCarlisi

A T76 and GT42R (large) are about the same size. I believe both will be good for 600+ at around 15psi. 700 sounds like a stretch -depending on what psi 'with ease' equates to

sillbeer

I believe red-rx7 was running a t76 and had estimated at over 700.

-Destin