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420A turbo esi psi question

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langelg6

Proven Member
52
13
Nov 4, 2019
Hammond, Indiana
I know this as been answered a billion times and this probably isnt even the right forum so very sorry but unable to find info I need. I just bought a 95 talon esi with a new engine 81,xxx miles and am wondering about the results of a low boost set up 6-8 psi with stock internals. I do plan to buy forged pistons and rods for $800 specifically for the 420a and set of crower stage 2 cams for $350. Mods I already have include intake, headers, catback, tune. The car was sold to me from a family member for $400 and I witnessed the engine swap,no check engine, abs, etc, new tires, fresh oil change, most hoses/lines replaced and etc
 
Boost usually tells you very little about how an engine will fare (compared to what turbo you use), but 6-8 psi from any usable turbo would be safe on stock internals if the engine runs well and has good compression. Nobody can guarantee that your car will live if you use a cheap turbo setup, though. How is the car tuned? You'll be discarding pretty much all of your existing modifications if you want to turbocharge it.
 
You asked of the result with stock internals, and then you stated that you will be replacing the pistons. Are you replacing the rods too? What are all the things you will be replacing? And what parts are you concerned about?

He probably wants to run a low boosted engine for a bit. I imagine his rods/pistons plan is more long-term (i.e. when his car blows up or something).
 
The boost pressure is irrelevant. The stock internals are good for about 200wtq. A low boost setup can still be reliable on the stock internals, but people run into issues when they build cheap turbo kits with eBay parts. When their setup has issues with boost creep or their fuel system was not upgraded correctly is when the motor gets taken out.
 
You asked of the result with stock internals, and then you stated that you will be replacing the pistons. Are you replacing the rods too? What are all the things you will be replacing? And what parts are you concerned about?

My question was answered about stock internals but after hearing only 200wtq I would prefer to wait for the forged internals.

The parts I plan to replace/buy for the 420a before going turbo

forged pistons and rods/ $800
crower stage 2 cams/ $350
titanium valve springs and retainers/ $260
forged intake/exhaust valvles $60
60mm jeep throttle body/free
weapon r ported billet intake manifold $400
450cc injectors/ walbro 255lph fuel pump/ not sure on price

and some form of tuning software. Sorry for late reply extremely new to the dsm world and have been taking the time to do some research before asking dumb questions

now my biggest questions are what are my options for fuel management I have heard the term "smfu" I have no idea what that is but have read that "smfu" is junk if I plan on going over 8 psi of boost and that megasquirt would be a better option for fuel management... Where and what is the megasquirt thing, is it like an ecu? and how much is it??

2nd.. by going with a bigger cams with the crower stage 2s do I go about swapping them as I would with oem cams or is there something special I have to do with the heads?

also would reinforcing the valvesprings, valves and retainers alone allow me to rev higher or raise the rev limit safely to 8k rpm

lastly after how much horsepower/tq would I need to worry about the crankshaft so whats the power limit on 420a crank? and how would I go about reinforcing my plans for the talon are daily driving with very rare track usage and my goals for horsepower is about 400-500 whp with 25lbs of boost on forged pistons/rods, bigger cams, reinforced valvesprings and retainers, thicker head gaskest and arp head bolts
 
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