i need a turbo for my 20b and i herd between 40r and 42r are really good witch should i go with?

 

i think on a 20b theres no point on going with anything less than an 80mm turbo.. mabey a borg warner s480, or a 80mm GT42R.

What are you power goals with this engine? and at what PSI?

 

i want 500whp or more nothing less

 

72mm turbo @ 10psi will make 530RWHP

 

ok does anyone know how much boost i can run before something happens or apex seal go on me ??

 

that question depends on countless other factors.. but i wouldn't imagine before 20psi; which is plenty of power.

 

I'd go with a 40R. I have a 4202R and I'm not even really into its efficiency at 575whp. A 40R should spool faster and still make plenty of power

 

what is the difference between the 4202r and the 42r

 

dude you just asked that question in another thread.


If you are looking for a Big fat turbo that will still spool plenty fast, then go with a borg warner s475. They're 600 bucks.. you cant beat that really.

 

I wouldnt go with a divided housing turbo, so the 40R and 42R are definitely not my picks. Dumping exhaust from 3 rotors into 2 halves of a turbo is a mess and you could lose power or have longer spool time.

I would go with something like a Precision 71-76mm, or like Chaotic said, S475. The Precision turbines are a little smaller than the BW units but they will spool quick and make nice power. The BW stuff is much less expensive though.

The GT4202 IS a GT42R. There are 2 variants of the 42R, they are the 4294 and 4202. The difference is the compressor wheel.

 

oh ok cool... the 4202 has a 102mm compressor what does 4294 have ? which would be better ?

 

i have a holset hx52 for sale its the one on the top...one on the bottom (NOT FOR SALE) is a holeset h2e


the holset hx53 specs: the comp wheel is 67mm, the exhaust wheel is 70mm, and the housing is a 16cm^2.

 

how much power and what pounds of boost?

 

Measuring the exducer it has a 94mm compressor. I would recommend the 4202, its compressor is better for higher power because its more efficient at 15-25psi and higher airflow levels.

 

I've got the turbo for you.
Brand New
T6 flanged GT4202R
Ball bearing/water-oil cooled.

pm me if interested.

Sorry for the spam

 

how much man??