how would spool up difference between the spoolup between TO4S with 1.0 divided compared to TO4r with .96 divided ?



keep in mind that my ports are going to be huge

 

How much turbo lag do you think a Garret T3/T4 hybrid turbo with .70AR will have? Unlike those massive turbo's with turbo lag until like 4,500RPM and peak hp at like 8,500RPM...I'm looking more for spooling to happen at 3,500RPM at the latest and have a smooth powerband till 7,500RPM.. Any suggestions on a future turbo perhaps, if not the one I've got now?



How much hp do you think I can get out of this turbo of mine? I've got a Walboro 255 fuel pump, RC Engineering Blue-Printed and Balanced injectors, Vortech fuel-pressure regulator, G-Force tuned ECU (FCD of its own), and 3inch Racing Beat down-pipe, 3inch high-flow cat, and 3inch dual Racing beat exhaust...



According to the previous owner the car dyno'd at 287hp or so @ 14psi, using the stock TMIC, and just the electric fan that is installed to keep it cool. With upgraded intercooler and radiator, can't I push like 22psi on that turbo, SAFELY? Oh yeah, we're talking about a J-Spec S5 core motor with everything else off a J-Spec S4 motor...

 

oh yeah..... i want about 350lbs of torque before 4k rpm

 

that T3/T4 **** is for Honda's. If you don't want "lag" you should pick up a .84 T-04S. Dragon ran this on his car for awhile and man did it boost up fast.

 

update...... all manifolds are divided

 

i heard about some ballbearing turbo's in japan with ceramic impeller's and you can literally blow on them and they will spin very easily. they have no lag and are extremely expensive but only last a couple years cause they are so brittle.

 

If your going to boost 1.2 kgcm or less go with the S because it is cheaper and you won't get any benifit from the R until you go over that boost level. If your going to boost over 1.2 then definitly go with the R. I'd run the 1.0 ex housing on either turbo. There will be a little more lag on the bottom end, but not enough to make much diffrence, but you will have way better top end and the mid range power band will be much smoother and over a larger RPM area. This will make it pull harder threw out the power band while making the car much easier to control. It will also help you to not drop out of the power band during shifts.

 

Past 9psi on the stock s5 t2 hotside is choking....

14psi is about the limit on that turbo setup you have.

Don't expect it to last long at that psi either.

 

So what's the verdict martin?

 

Go with the stock twins, I hear they're awesome!