Top speed only 160km/h

[Awang]

I don't know why Mazda maintain the top speed only 160km/h. In the speedometer it self maximum speed was 220km/h and when I drove to maximum speed at 160km/h the RPM still at 4500 still far to go RedLine 6500. I feel ashame everytime I drove thru highway I was easily bypass by 1.3L cars even diesel cars like Nissan Sunny and Toyota Corolla. My car detail is Mazda 323 1.6GLX(A) BA, Engine Type: B6 DOHC 16 valves, Model 1996.

 

[Salmon_Rob]

do you have any mods? the car only has 78 whp

 

[SilverBulletES]

Oops. I guess you bought the wrong car Balki. (hah)

 

[Awang]

I ever try race with my friend Mazda 323 1.3 SOHC same model with me but manual. He bought early than me, I bought in 1999 original completely with bodykit + alloy rim 16". In acceleration I'm easily left him behind if we meet at traffic light but in long distance he will left me. Both are still in stock no modification. I guess may be his car was manual. He said his top speed was around 175km/h. About modification what are the best way to modify my car? Does it increase my speed? TQ for your suggestion.

 

[TheMAN]

sounds like there's something seriously wrong with your engine
the B6 should make plenty of power

 

[MazKid]

Hell, the B6 in my '88 323 SE auto pushes my car to 103mph at the redline in 3rd(into the redline in 3rd I should say, as the car will not shift to 4th under full throttle in any circumstance...).

 

[Awang]

I'm not sure there was problem in my engine. I think it is still ok. For your info our cars in Brunei are the same model with Singapore. I had read the Mazda catalogue for Mazda 2 1.5L auto had hp around 111 and top speed 170km/m while Mazda 3 1.6L auto either normal one or sports model had hp around 107 and the top speed only 166km/h. Correct me if I'm wrong, I think Mazda had set the speed limit for this car but don't know how they do it. I can push my car to 160km/h with 3rd gear when I press pedal to the floor and it will never shift to 4th gear if I don't release the pedal. Even though how hard I press the pedal in 3rd gear the speed remain at 160km/h and the gear keep changing between 3rd if I press to the floor and shift to 4th gear if I release pedal a bit.

 

[MazKid]

I'm not sure there was problem in my engine. I think it is still ok. For your info our cars in Brunei are the same model with Singapore. I had read the Mazda catalogue for Mazda 2 1.5L auto had hp around 111 and top speed 170km/m while Mazda 3 1.6L auto either normal one or sports model had hp around 107 and the top speed only 166km/h. Correct me if I'm wrong, I think Mazda had set the speed limit for this car but don't know how they do it. I can push my car to 160km/h with 3rd gear when I press pedal to the floor and it will never shift to 4th gear if I don't release the pedal. Even though how hard I press the pedal in 3rd gear the speed remain at 160km/h and the gear keep changing between 3rd if I press to the floor and shift to 4th gear if I release pedal a bit.

They effectively set a limiter by not allowing full throttle in 4th gear. I had my 323 up to ~103mph, let off til it went into 4th where it got up to ~104mph(going down a hill of course!), then I gave it more and more throttle but it then downshifted to 3rd just about at the rev limiter(6,300rpm).

The only fix for this? Manual swap.

 

[Falango]

If your engine dropped to third, that thing should have blown to bits!

 

[MazKid]

Nah, not with 75,000 miles completely cared for by a Mazda Master Tech(my dad) all of it's life. It is on the 2nd trans after reverse went out several years back(before I drove it). Super reliable. I never broke anything on the car during my time driving it, though I did get hit in it by a Dakota and am going to pay for it whenever we get the car back from the guy fixing it(who has had it for the past year).

The rev limiter on the 323 I believe is 6,400rpm. When it dropped to 3rd it was just shy of that. I bet I could make it drop past the limiter but not only do I not have the car right now, I don't think I need to make an experiment of a mechanically mint 323.

The thing about the B6 engine is that it runs out of power at about 5,700 RPM and struggles to accelerate past that. Late for school on a winter day 2 years back I gunned it like 30 seconds after starting and the transmission shifted slow to 2nd, making it run up near the rev limiter...never hit it but it hung there for like 3 seconds, just screaming along, until it shifted to 2nd.

Thinking about it, the B6's max torque is 92ft lbs at 2,500rpm, and max hp is 82 at 5,000rpm. In the middle it pulls pretty good, so I don't know why Awang's car wouldn't be able to atleast make it to 5,500rpm in 3rd. The gearing could be the reason.