Steve-O said:
Well turbo lag is almost a thing of the past these days. I would be extremely curious for someone to document the time it takes a turbo to spool up. For the kit, we are using a ceramic-ball bearing turbine, not the bushing type. This allows it to spool up faster than any other type of turbine. Even the safari turbo had a bushing turbine, anyone running this notice the lag? Dont worry LR_RESQ, I'm not saying your wrong, or trying to pick a fight, but I'm a turbo lover!
Well, this stuff is REALLY open to decades of debate...
Yes, in theory the ceramic coated ball-bearing turbine will spool up faster than the older plain old "floating" bearing. However, this really isn't demonstrable unless using high boost and the concurrent higher turbine rpms. So for a much smaller engine that you are really trying to work for maximum hp you'd naturally want to run the biggest turbo you could since it could produce the most boost. The downside is that it wouldn't fully spool up until you were way up in the engine's rpm range so you'd want to have the turbo spool up as fast as possible. Then you'd notice those ceramic ball-bearings. In the relatively tame boost range most people would ever want to run the 1fz (<10-lbs) this is pretty much moot. The one benefit would be that you could see is that IF you ever decided to start massaging it, the internals are already up to snuff.
The other point is that the Safari used a Garrett T-04E unit that is readily available with ceramic coated ball bearings, beefed up internals, and even a ceramic coated housing. Further, you can pay someone to rebuild and retrofit all of those guts into your existing T-04 housing for just about $1K. The standard rebuild for a Garrett using the standard inards is under $300.
Lastly, there is some evidence that the older design wears better and requires less frequent rebuilds. Unfortunately, this is highly subjective since the two are typically treated dramatically different as mentioned above.
So in the case of the 1fz it seems like the turbo being used isn't going to produce any dramatic differences alone. I think it will come down to controlling temps and fuel/air management. How well your intercooler works, how well your fuel delivery works, blah, blah, blah.
And for my two cents, I don't see how anyone with an auto tranny is ever going to detect turbo lag! Like eveyone has said before, these are relatively small turbos for this size engine displacement so they spool up by 1200 rpm or so. My slush box is still deciding what part of the drivetrain it wants to let moooooove
BTW, Steve - did you guys have the intake ported & polished? Yes, that engine looks very nice. Reminds me of when I saw the hi-po 2F.
Will your 3" exhaust have to follow the stock routing below the frame? How are you guys addressing the catalytic converters?
Oh well, it's Friday and your system looks like it is coming along great.
Cheers
Mike