I think you should be able to make around 390 at 8.5 psi depending on what else you do. Hey man I think you should do it. good luck with it and I cant wait to see it.

 

9 is the magic number for the S50/S52 block, it's very reliable on stock internals. I never said I wasn't building the engine.. I know it's got some miles on it so I'm going to replace the pistons with 8.5 CE ones, I'll leave the factory forged rods. My compression should be decent at this point, 222 to the wheels with intake/chip/exhaust generally implies a strong engine. With the pistons I should be able to run 14-15 in race trim, 9 or 10 on the street.
I'm looking at one of the cars on boostjunky.com right now (99 M3) that's making 404hp at 11psi on 91 octane. I think I'm in the ballpark. This was a 16psi run on another OBDII M3 http://www.boostjunky.com/carlos16psi.jpg 433hp and 440tq to the wheels.
Who knows.. it is exciting though. I don't know of a single estoril blue turbo M3 out there.

 

I should of kept your glasses and sold them on DragVA cause apparently you have money to spare.. Damn, I regret it now.

 

So with your build are you planning to use stock internals, and what sized turbo are you going to be using? ALso one more question, how much does a stock M3 like yours make to the wheels for me to have a basic idea here.

EDIT:just read what you wrote before. But again what size turbo do you plan to use? I think you could run stock internals on your car, just make sure you use a good standalone to tune it right and also tune a different map for when you go to the track and run high boost along with high oct race gas(can never be too safe with stock internals, if h22s could push out 400whp stock internals and race gas with a nice sized turbo i expect more then that outta you haha) . Just stick to like 9 or 10lbs for the street tuned on 93oct. That should be good enough.

 

I am still skeptical about 180RWHP with just a turbo set at such a small PSI level.

 

With the right sized turbo and the fuel and timing tables tuned agressivley enough it ccould be done. Just gotta be a firm believer thats all. hehe

 

Yea i agree your car could put down 330 to the wheels ball park with stock head and intake manifold ect... and even with the new pistons.. BUT... my question is for how long? how reliable is it? your block is not designed for boost.. YES you can turbo it and yes you could spray it yes you could even but a super charger on there.. but you have to come to realization that anyone can put a turbo or what ever on the car and drive it... but theres sooooo many hidden cost and extra exspences when it comes to putting boost on a car that did not come with it from factory. Now you gotta worry about reliability and how long is this motor gonna last? 20k maybe? 30-40 if ur lucky? Im just saying if you plan on boostin your car is this goes for ANY car.. just do it right build your motor to handle the stress before adding stress to it other wise sooner or later and more then likely sooner your boosted not built motor will not even work for you.. and id hate to see a m3 with a trashed motor. Im not tryin to dog you at all im just tryin to help. insted of just slappin on a turbo on ur car build ur motor first so when you do turbo it you can be reliable plus have the power your lookin for.

 

Reliability is all in the tuning. There are a bunch of cars all over Va that are running stock block GSRs and Prelude motors pushing that kind of power for like at least 2 years still on stock block. To me its all in the tuning, and by that i dont meant like running a SAFC. haha

 

Well you've gotta figure it's a fairly large engine to start with. Another thing to remember is that the OBDII robs the M3s of power. The 95 M3s are 3.0s, making 240 crank, the 96+ is 3.2 with 240. The ONLY difference is the OBD. I'm taking the old OBD and putting it on a car with .2L more, in addition to the turbo, which will either be a T60-1 hybrid or GT30R/GT35R.
Jason, the guys at AA know what they are doing, I've never heard of an AA tuned car blowing.. and many of their cars are using stock internals. You will not blow the shit up if you stay under 9 on stock internals.. I'm the 3rd owner of my car so I don't have that kind of faith in the engine, and frankly I dont want to be nervous every time I hit boost.. so I'm throwing in the forged pistons.
And you're wrong about me randomly deciding to turbo my car, I've been reading about it for 4+ years on the fourms. I know what I'm talking about (in the bimmer world anyways.) I'm also well aware of the hidden costs, which is why I said spring.. it's going to take me that long just to save up enough money.
I hear what you are saying about building the engine though, I'll probably do the opposite of most people and build the engine up this winter and add a stage 3 clutch/ltw flywheel before I even decide what turbo I'm going to run.

 

How much luck do guys have running forged pistons on stock sleeves in your bimmer engines? Im sure that could be fairly reliable on a good tuning sesson. Tune one map for the street ala 9 or 10 lbs, and another one for the track like 16 or 17lbs on race gas. What standalone do you plan on using?