Wasn't trying to pick it apart at all. Just you didn't mention these items in your cost aspects. I just wanted to be thorough, for Jadstar's benefit.
At some point (and I don't know what that is), you have to worry about knocking too. The stock 3S-GTE engine had a compression ratio between 8.5:1 and 8.8:1 from 1986 thru 1999, which is proper for a positive pressure intake potential. Your 3S-FE has a 9.8:1 compression ratio. I believe all 3S-GTE's had knock sensors to retard timing at the onset of knock. I don't believe your 3S-FE engine has this knock sensing protection.
Lastly, your MAP sensor only spans from vacuum to atmospheric pressure. It can't read above 0 psig. So you won't get any more fuel through the injectors as you create positive intake manifold pressure. Higher volume of air without added fuel causes lean A/F ratios. This is where a turbo/supercharge based MAP sensor is needed, and a fuel map to correspond to it (i.e.; a different ECU). You may have these items already - maybe within your cost projection. Even the stock 5th Gen All-Tracs didn't go aboe 8 psig boost.
Again, I apologize if you think I'm picking someone apart - I am not. I'm trying to show the degree of change required going from a normally aspirated engine to a turbo engine. That's all. I couldn't do it for the cost you stated - and I do most of the same work myself too. You have much better access to lower cost parts than I do, however. Yes, having time/patience in the process to get the best cost helps a lot. You are demonstrating that. I just must not have had the same patience.
We have differing opinions, so let's just leave it at that. You are demonstrating that you can do things for far less cost that what I've been able to do. So it is possible then. Just a lot to it.
I didn't mean picking it apart as a bad thing, I apologize there. It is good to spread it open.
The stock 3sgte does indeed have a different compression ratio than the 3sfe. I will be using 3sgte pistons as part of my full rebuild, along with a 3sgte metal headgasket to further change my compression to handle the forced induction. As for a knock sensor, 3sgte does indeed have one but for my application it is not necessary. As for MAP sensor, you place the sensor before turbo in this situation. Due to how low boost I will be running, there is enough fuel delivered. The 3sfe fuel system is a tad wasteful in all honesty. If I was going higher I would require a fuel controller, which can be found for $100 to $400, give or take.
Stock PSI on second generation 3sgte (5th gen Alltrac/GT4) was 10-12 PSI. For a first generation 3sgte (4th gen Alltrac/GT4) was also 10-12 PSI. It was increased after that. I am going to be running 6-8 PSI, so close to half what the stock settings are.
We do have differing opinions however I can safely say this is something that I have been researching on, working on, and helping others on, for almost a decade now. As for my ability to do things cheaper than most, it has to do with patience and knowing exactly what I am looking for. A lot of people when they tune things take either the easy way or follow what someone else did without doing any research on parts. I am not saying you are wrong in any way shape or form and I have no problems explaining most of what I am doing.
Jadstar, the one thing you should take from the two of us going back and forth is that if you don't know what you are doing, this can get very expensive very quickly. Tuning any car requires a lot of patience and research. You COULD go the easy ebay turbo route like a lot of Honda's do, but even they do research and change parts out.
Funny enough, you will always get naysayers. But then when you show them, it usually blows their minds.
Not saying 93Celica is a naysayer, they are more of a realist.
