Quote:

---

I've driven with both types...

I had (several) normal hybrids (broke three in less than 6 months)

Performance was pretty good while the units were running OK - boost was great in the midrange and tailed off at the top end (as you'd expect) They were cheap units (as in price AND quality) so didn't last very long, especially when decatted.

When I eventually got all my money back for the sub-standard hybrids, I shelled out on a GT28R.

I can now get 1 bar at 2,600 rpm, 1.4 bar at 3,000 rpm (although I accept that the "superspool" unit can give much earlier spool-up than this). However, I also get decent boost right the way to the redline (although again, I accept that this is significantly bettered by the GT28RS)

Basically, I find the GT28R is a perfect compromise between everyday drivability and early(ish) boost, and storming top end power. On my last three dyno runs, the power was still increasing when the car hit the rev limiter - a sure sign that the turbo is delivering good power. Remember that my car is a 25,000 mile a year commuter, as well as a Santa Pod / TOTB / trackday hack. Even my suspension and brakes are erring on the side of usability over outright performance.

If you can take a deep enough breath, get a roller bearing unit - you'll never go back to a journal bearing turbo.

---

thanks for that post Nigel.

cheers.

Quote:

---

There was an interesting post on the Unichip group buy yesterday about turbo cars having NA type power curves. I'm beginning to see the logic. I'm starting to question the wisdom of having big boost available at low revs as with a fast spooling turbo. For one it nukes your clutch and 2) the transition from off boost to on boost is very violent. It seems that one of the advantages of the GT28R is that it shifts the powerband higher and gives that real top end pull that the standard car is sadly lacking. Power at this end of the rev range is also much more clutch friendly. On the other hand that mid range grunt is what turbo cars are all about. It was an eyeopener two weeks ago to find my car had more mid range than a 911 but wind it up further and my car was history. I just wonder like Suba whether the GTI R hybrid would be a best of both worlds.

---

hi cosmo.

funny you should bring up this NA issue. Lately , I've
been messing around with a Nissan G35 Coupe (ie , the
new Skyline) and with its 3.5 liter V6 engine , produces
its power in a very different way when compared to my
mildly tuned coupe.

mid-range wise , I can get away from that car , without
much difficulty, but once that NA is up to speed , then
it will begin to use its torque spread to haul me back.

but at the end , its a 3.5 giving out an honest 300 bhp
versus our wrung-out 2.0s.

I hope to get better response and smoother power from
my 28R.

cheers.