Hi, While driving my Evo today I noticed that from a stop the engine revs up kind of slow compared to my Mazda MX-6. Isn't the 4G63 in the Evo supposed to be really responsive?

BTW, I only have 75 miles on the car. (will it rev up faster after break-in?)

Could it be loose belts? My car was built in August and I got it yesterday.

 

99 views? cmon guys!

 

Sounds like you are describing turbo lag. Is this your first turbo car?

 

It is my first turbo car.

But does turbo lag effect revving at the lower RPM range? (1-2K rpm)

 

If you're talking about neutral revving then like mine it takes a split second for it to overcome rotating mass and rev. Solution: lighter flywheel. Works has one that sounds interesting enough to check out.

 

stock turbo engine!

 

Heavy flywheel, IMHO.

With all due respect there's a lot of misleading "comments" around.

Evo is supposed to be "responsive" relatively for a turbo car. Of course the comparison to its nemesis the STi comes to mind. 8.8CR vs 8.0CR, Evo is noticably better.

But don't expect too much; for the surreal free-revving experience, try a Honda S2000 or the NSX.

 

A turbo motor has lower compression so if you had built up boost it would rev faster so this is part of the problem. Once compression is built you can rev plenty fast. You don't want a motor to rev up blazing fast anyway. If it does you can actually hurt internals on a stock motor.

 

yes the rev seems relatively slow, how are you going about your break in period? as far as the slow rev once u get an exhaust and open air filter you'll see a big improvement

 

The WORKS Spin lightweight flywheel makes a huge difference in throttle response and helps in rev matching on downshifting to boot. It takes a little while to get the feel for driving with a lightweight flywheel, but the responsiveness of this set-up is more than worthwhile.

-- DavidV

 

Your EVOVIII does have a great throttle response compared to most turbo cars (esp. mine...ugh). The reason being there is a something blocking your exhaust path

With turbo cars, the car companies are more concerned with spool up time than throttle response. The header design is not optimal for throttle response, but is designed to get the turbine spinning as quickly and efficiently (gas velocities and temps) possible. Therefore, without a long technical doc, this is the simple reason why motor seems to have poor throttle response.

Go drive a 1.8t or 2.7tt motor and you'll feel much better about it

A lightweight flywheel will help, but there are some drawbacks, such as what I call "hanging revs". This is where you are lackadaisically shifting and the inertia of your flywheel keeps the revs high while you have the clutch in and are shifting, giving you a smoother shift. When you take away mass from the flywheel, it lowers the inertia allowing the mechanical losses of the motor to slow the motor more quickly. Daily driving becomes a PIA if you go too light. When the clutch disengages the RPMs drop like a rock if your not shifting quickly.

I'm not saying a LW flywheel is a bad thing, but you must be careful.

Have fun

 

When your car is broken in your car will rev like crazy after 3500 rpm.

 

you guys think you have bad throttle response? try a turbo rotary car