Turbo Spool RPM's

[fritts]

I am still contemplating the turbo size to use and would like to see some figures on turbo size, spool rpm @ PSI, power and max power possible. I am reallying contemplating a smaller large AR T3 but am worried it won't produce much power at the flow rates we need for our engine. Any real life or speculated data would be great.

[TrunkMonkey]

what type of performance are you looking for?

-demetrius

[fritts]

250 WHP or so

[TrunkMonkey]

what i meant was, are you looking for low, mid range, or top end performance? a smaller exhaust a/r will give you excellent low and mid range power, but will choke off performance in the higher rpms. vice versa for a larger turbine. it will have more lag, but will produce more peak power.

imo, there is way to much emphasis placed on how fast a turbo will spool up. no one launches or races at 2000-3000 rpms, so why be concerned with boosting so low? the key is to find the least restrictive turbine for the power and boost you want to run.

-demetrius

[fritts]

Well the more and more I drive my 240, I wonder what will happen if I bought a t3/t4 .63 AR or so would I be in and out of the powerband the turbo would create. I am sure its not a terrible issue but an on rush of power could give me some drivability issues especially as this is my daily driver. I was thinking as long as I am not hitting full boost 5-8 psi after 3500 rpm or so it would still stay a fairly easy to drive car. I also wanted to know what type of difference a compressor makes for full spool 5-8 psi again between a T3-60 .63, T3/T4 .63, and a T04 .57. If there is a large difference in rpm of full boost I would opt for the smaller compressor but if the difference in rpm is not much between the two I would opt for the large T04, as it gives me more possibilities in the future.