billbadass
Drag Racing Champion
- Location
- your moms house
I think EQT is 400-500rpm slower spool than is38, but there are things you can do to help improve the spool like turbo inlet and big downpipe etc and tuning tricks. on ethanol is totally different ball game though and I've seen EQT dyno charts of EQT Vortex turbos spooling on E blend fuels as fast as an is38 on standard, and Ed talk about how he could have spooled it even faster potentially but no reason to do so and put unnecessary stress on the bottom end.
seriously though the lag difference on any EQT Vortex vs an is38 doesn't matter at all, and it only is possible to feel it at <3k rpm in my own experience, above that any of these turbos light up almost instantly. my turbo also spools ~400rpm slower than an is38 and you notice it not at all, and the low end torque is still fantastic, and the slightly slower spool actually improves the traction materially
my turbo spools about the same as standard EQT Vortex and on E55 fuel mix I'm still making 400tq at the wheels at ~3,300rpm on Ed's dyno, and I'm making >300tq at the wheels at just 2,800rpm, and on the street spools even faster than it does on the dyno too.
all this talk about lag and slow spool and stuff is way overblown imo and only matters when you look at a dyno chart. floor your car at 3k rpm in 4th gear and try to time how long it takes for your tachometer to sweep through 400rpm
seriously though the lag difference on any EQT Vortex vs an is38 doesn't matter at all, and it only is possible to feel it at <3k rpm in my own experience, above that any of these turbos light up almost instantly. my turbo also spools ~400rpm slower than an is38 and you notice it not at all, and the low end torque is still fantastic, and the slightly slower spool actually improves the traction materially
my turbo spools about the same as standard EQT Vortex and on E55 fuel mix I'm still making 400tq at the wheels at ~3,300rpm on Ed's dyno, and I'm making >300tq at the wheels at just 2,800rpm, and on the street spools even faster than it does on the dyno too.
all this talk about lag and slow spool and stuff is way overblown imo and only matters when you look at a dyno chart. floor your car at 3k rpm in 4th gear and try to time how long it takes for your tachometer to sweep through 400rpm
