7 psi is safe to boost on a stock d-series motor
you might be running too much boost off of your turbo especially if youre running a stock turbo
If it hasn't got a turbo there's no place for it to get boost from.
The stock boost of a 1987 Toyota Supra Turbo is 6.8 psi/0.46884349504 bar.
any internal combustion engine can use a turbo or SC, the question is how much $$ and how long will motor last with the added stress. Which will be determined also by how much boost you choose to push.
yes all you need is a boost controller
No, they do not come turbo. Yes you can boost them though. I was running a KA on boost with stock internals just fine. Obviously do not turn the boost up to 20 pounds or something..
35 psi with stock turbo or 49 psi with stock head gasket.
6 pounds of boost is the safest without engine damage. the compression ratio of a type-s motor is 11:1.0 this is really high, and to add more pressure on the motor will simply cause engine damage. most turbo cars the come stock with turbo have a ratio of 9:1.0 or 9:5.0 having a boost controller is very important when adding a turbo or supercharger. at 6lbs of boost, you will have 50-60 hp more. and for the type-s its pretty good. anymore you will need motor work.
I believe it is in the ball park of 14 to 15 psi of boost. That is what my turbo talon run. Edit: A stock 1g DSM (Talon eclipse laser) has it set at 9-12 PSI. while the stock gauge says 14 sometimes it should not be trusted. get a aftermarket boost gauge and find out yourself
I think around 14-16 psi
Stock turbo can run close to 14 PSI...but you can increase as much as your turbo can. The engine will not last as long with higher boost. Upgrading internals such as pistons, rods, crankshaft, camshaft, and valves can allow much higher boost.
the turbo has nothing to do with blowing the motor it's the amount of boost you run the will blow it the bigger the turbo the longer it will take spool.