Hey guys just bought this del sol off my friend, has a full greddy turbo kit with most of the necessary turbo upgrades like fuel lines, headers, intake , its at its lowest psi, i think its 6-7. I want to make this engine a reliable turbo engine, but not spend hella money. I have been doing some research and decided to get valve springs/retainers and arp headstudd. Rite now its around 200whp and i want to make it 250-270whp, would i be good with just valve springs and retainers with arp headstuds, and then increase the boost until i hit 250-270. Or would i have to get forged pistons rods, an new cams. Im new to the this turbo stuff, and info is much appreciated

 

You don't need anything like valve springs and retainers. Apr head studs aren't a bad idea

The stock greddy actuator limits how much boost you can run, even with a controller

The exhaust elbow off the turbo and the tiny downpipe are huge restrictions

People with an upgraded actuator (14psi and above) plus a complete 3" downpipe and exhaust are making 300hp and that's about the limit of the turbo on a b series

The greddy turbo is a Garrett/mistu hybrid. Cold side is all Mitsubishi parts and the chra (I think, might be mitsu) and the turbine wheel and housing are all Garrett

TheShodan can reply in greater detail

 

So get a new downpipe?

 

get a proper tune and eliminate the GREDDY "control box". With that current setup, THERE IS NO WAY you're making 200hp. I bet you $500 that if you take your car to a dyno, you will be lucky to make 165hp.

 

That too, the greddy blue box only works under factory boost levels. You need a chipped ecu, wideband and possibly larger injectors before going further.

And you can't buy a premade downpipe. You need to buy the components and have someone fit the and weld them. Things such as the turbine outlet flange, 3" piping, etc. Remember you're deleting greddys cast discharge elbow