This is probably asked alot but how much horsepower can the stock 4.6 2v block handle? and how much boost?

 

Stock block meaning no forged internals under 400 rwhp but it is all in the tune. I would keep in under 380 rwhp and at 8 psi. I was at 10 PSI aftercooled 400 rwhp and blew engine after 3,000 miles.

Higher boost = higher compression along with consist high reving rpms is not good for stock pistons meaning do not beat on it.

I recommend you go with 8 psi but add either LTs or Blower Cams to reduce your psi/compression on stock internals but you willl have more power with less strain on your pistons.

Note: Stock cast crank is good for 600 rwhp.

 

nope you are the first to ask, lol just kiddin. Triangle has good info up top there. Its all in the tune from what I have been told. I only have two fears... my wife beating me if mine ever goes ka-pow and the bill so I dont beat on it much. If you cant pay dont play!

 

I checked your garage and there was nothing there. I don't remember if you have an automatic or manual transmission. The tuners I've talked to all say not to go higher than 370-380 rwhp on a daily driver (manual transmission). That's approximately 435-450 hp at the crank. An automatic has more parasitic loss so the same setup on an automatic will get you about 350-360 rwhp.

Putting on PI heads will increase your compression ratio so you should limit the boost to 8 psi (intercooled).

 

Yeh mine is a 98 gt with a 5 speed and its the t-5 tanny, cause the way things are going i was looking at mmr because im going to tear the engine down in the summer anyway and im planning on going vortech with this car after the pi swap idk i guess it will all come in time