I just pick my ne 2010 Evo yesterday and I've noticed a stuttering when slowly accelerating in 5th gear. Wondering if I should take it back.

Thats more than likely surge from the turbo try and keep out of the lower rpm's when in 5th gear.

Thanks I figured it might of been something I didn't know about the car. Thaks for putting my mind at ease.

Sorry double post caused by phone

ahhh saved me. i was gonna post the exact same thread.
5th gear, usually when going a littl uphill, 2100 and up starts stuttering like crazy.
figured it had to do with the turbo but didnt know if it was a fault or not.

Just like an automatic auto when your climbing a hill you don't want to be in overdrive, on a turbo car you want to stay in the higher RPM ranges.
Think of yourself on a 10 speed bike, would you rather be in a more free spinning gear the will have less pressure on your legs or the gear that you have to blow out a nut to push the pedals down? On hills keeps the rpms above 2700.

My car does the same. Gotta switch to 4th a lot of the times when I'm in a 45mph zone since that 2k-2500 range will shudder like that.

My 2010 GSR does the exact same thing! Under acceleration in 5th gear at approx. 2200 RPM, the car seems to choke and studder. I found that shifting from 4th to 5th at a higher RPM helps.

I can't remember a single time when I've been under 2500rpm in 5th gear.

If it's that low and stuttering that should be an indication to you to upshift into 4th, not that there is something wrong with your car.

should be an indication to you to upshift into 4th, not that there is something wrong with your car.

Normally aspirated cars don't shudder/buck like that at ANY rpm. It's not that the rpms are too low for the gear, either. The car will move along fine at 2k for miles and then you go to speed up and you'll get the shudder at some point.

I asked my tuner about it once and he had no idea since no boost is being produced at that RPM. Nice to know that it is a design issue.

Guys, read the thread. Hollywood already answered it. This is absolutely, 100%, beyond any doubt, without any question, completely normal with this car.

Thats more than likely surge from the turbo try and keep out of the lower rpm's when in 5th gear.

Just like an automatic auto when your climbing a hill you don't want to be in overdrive, on a turbo car you want to stay in the higher RPM ranges.
Think of yourself on a 10 speed bike, would you rather be in a more free spinning gear the will have less pressure on your legs or the gear that you have to blow out a nut to push the pedals down? On hills keeps the rpms above 2700.

In 5th gear pulling a hill you are most definitely making boost at 2000+ rpm.
This is probably even in the manual, you never want to bog a turbo car in any high gear.
Its also why you tune for 4th gear instead of the lower ones. In addition 1st gear is totally separate mapping. Turbo cars aren't meant to bog when you bog them you are killing them.

I can't remember a single time when I've been under 2500rpm in 5th gear.

If it's that low and stuttering that should be an indication to you to upshift into 4th, not that there is something wrong with your car.

Is the stuttering due to a relatively large turbo on the Evo X? My little Corsa OPC 1.6 turbo (http://sentinel.dk/trackdays/msr/2009-05-07/web/index.html) pulls smoothly in any gear (including 5. and 6. gear) on WOT from even as low as 1600 RPM. :shades: Can't say I do it often (due to my driving style) but it is certainly doable without any stuttering or anything like that.

... it is a design issue.

+1 Design issue.

Does it happen with stock cars as well as tuned ones?