I am currently running b20vtec stock block with arp headstuds. I installed my old sohc setup garret t3 super 60 turbo with tial 38mm wastegate and blowoff using hondata s300. I have only driven it up to the gas station never passing 3k rpm. I would like to make 300hp or close with this setup. The wastegate currently has a 6psi spring. How much psi should I do to make this power and not stress out the motor nor turbo?

 

That is something for your tuner to answer!

 

you can not judge hp by lbs of boost

 

thats why i posted the motor and turbo size. i want to know so when i get to the tuner i have the correct spring for what power i am looking to make. please, experienced people only chime in

 

Again. Call your tuner and ask. Some people can make a lot more or a lot less depending on the tune.

 

Closer to the Max efficiency of that turbo - probably 13-15psi... either way after 15psi it will start falling off efficiency map. It really does depend on the tuner though, and how much you want your tune to be on the edge.

 

im very experience sir! no matter what you have no one can say how much you can make until you hit the dyno. all i know is...itll be +1 of whatever you have now

 

Ok. Im going to just bring different weight springs with me to the dyno and see where it ends up while still staying on the safe side. thanks

 

lol
see sig

 

Wanting 300hp out of a straight t3 60 trim is pushing the turbo to its very limit.. don't be surprised if you don't make 300hp

 

You really need to figure your vacuum pressure at idle and go from there to determine what spring to start with otherwise you will be paying your tuner a lot of coin for things you could have done for free! Boost controller or just wastegate?

I don't have experience but I have read and read for the past two years to know what needs to be done. And I can guarantee the only thing my tuner with be charging for is a tune!

 

ive heard others say the same about my turbo. I know its on the small side. Im using just the wastegate.

 

...and it shows. What you stated is ONLY for the BOV and assumes you don't have an adjustable one.

OP - I already gave you your info. Get a 1 bar spring and take it with you. You will need it. If you rather listen to the peanut gallery then so be it, join them.

 

are you serious? sorry but your wrong.

we made 440whp on 16psi on a dynodynamics with a peakboost kit, 10.5:1 and crower cams.

 

Are you sure you mean T3/T04E 60 "trim" (52lbs/min)? THAT's about 440whp. Not the T3 "Super 60" (35lbs/min) wantboost is referring to.

Just trying to clear up any confusion between the two before it gets ugly..

 

lol. maybe. its just the cheap turbo that came with the peakboost kit. so yes i was talking about the t3/t4.

 

If you would have read the very first post in this thread there would have never been any confusion.

 

Atleast 30lbs of boost...... Just to be on the safe side.