6G Celicas Forums

Trying to create even boost in all gears will destroy traction. Even with a dual clutch or in newer cases, a CVT still don't get consistent boost pressures. There's also external load contributors like road angle and wind resistance that you can only do so much about. Building on richees response. Turbo boost is based on the engines power band. The turbo won't spool up near as much in first because the duration is so short. 3rd gear is usually the best spool gear because the power band is long enough to feel full boost but short enough to feel the transmission torque. 4th gear output runs 1to1 with the engine (usually) so the transmission is less aggressive and the boost won't spool as fast.

It's water to air. That's why I was curious about it.

Also in theory is it possible to temporarily run the engine without the intercooler? Just pipe the manifold to the turbo?

I now have a non wiring question. I do appreciate the help so far guys even with how generic my questions have been. With the engine I got an st185 top mount intercooler. I don't have the external water pump or the sub radiator, is there anything else I need for that setup? And in addition to that my plan was to find universal sub radiator and pump because the stock ones are either very hard to find or they break my budget. The only sub radiators I can find are actually fmic. They aren't just radiators but I was wondering if I can still mount one to the front and run the coolant lines to my top mount? I assume I'll also need a reservoir for the system.

I have a flow chart setup with labeling. When I pulled the 22 pin from 5s harness didn't disconnect anything. I'm just going through 1 connector at a time

Sounds good. That's what steps I started tonight. I separated my 22 pin from the 5s harness and will plug it in and then follow it to both 3s harness and 5s harness to see which connector I will have to pull next. Longest part currently is finding the needed wiring diagrams. The labeling and marking for harness separation can be a pain but isn't near as time consuming. There are benefits and downsides to having the engine with the harness already attached. I didn't realize how much wiring there would be with the second gen or I would've pulled the harness before dropping the engine in.

Nee question however has come up. The 21 and 22 pin connector on the 3sgte ecu are +B and +B2 respectively. The 5sfe 22 pin connector I'm attempting to repin has a +B on pin 22. But no +B1 listed. How do I repin this?

I will have to spend more time in those threads. The wiring struggle has become a large one. I'm fine doing the work just figuring out what I need and what I don't out of two harnesses then combining them is. Interesting ha

Found a thread on exactly this problem sorry for the repeat post guys

As far as conversion, do you mean convert the current harness or work it together with the 22 pin for the third ECU plug?

I work at a shop with access to a couple of automotive sites such as all data which can be very helpful for tracking down information. If anyone needs a diagram found or pinout let me know and I will do my best to find and post it here

It is an st185. My only concern is wiring harness doesn't seem to be lining up. My coil and igniter end up centering on the firewall but all pictures I've seen they should be mounted near/above the brake booster

I started a 3sgte swap into my 98 celica just a few days ago. Everything has been going well so far, engine is in on 3 mounts ( fourth is poly filled drying currently) The problem I'm currently having iis being massively overwhelmed by the wiring. The harness was still on the engine when I bought it. Between coolant lines, vacuum lines and connectors I don't know where to start. I spent all day scouring through other forums and posts and haven't find anything as helpful as I'd like. 6 hours today looking at my engine bay and maybe two connectors plugged in. Any help or advice would be much appreciated