What is the max speed in each gear for a carb zen

mtnrajdeep · 23rd March 2007, 14:15

Hi Guys

I was trying to push my zen to the max possible speed in second gear and was surprised when the speedo crossed 60 kmph as I thought that the max in 2nd would be around 40. Has anyone tried maxing their carb zen's in each gear? If so, what is the max speed in each gear for the carb version? and what is the difference in these speeds for the mpfi version?

Rajdeep

kpzen · 23rd March 2007, 15:49

1st can do 40kmph..!!
2nd gear can do 80kmph..!!!
But why do u want to do this ?

revtech · 23rd March 2007, 16:05

ive done ...

1st gear 40 kmph
2nd gear 80 kmph
3rd gear 110 kmph
4th gear 135 kmph

mtnrajdeep · 23rd March 2007, 17:15

Quote:

Originally Posted by kpzen

1st can do 40kmph..!!
2nd gear can do 80kmph..!!!
But why do u want to do this ?

The car does not cross 110-120 kmph in 5th gear on the highways....got everything checked at an authorised service center and it is fine. So checking out if the engine is able to reach the max speed in atleast every gear

moralfibre · 23rd March 2007, 17:36

Quote:

Originally Posted by mtnrajdeep

The car does not cross 110-120 kmph in 5th gear on the highways....got everything checked at an authorised service center and it is fine. So checking out if the engine is able to reach the max speed in atleast every gear

Which year model is this? Carb or MPFi?

navdeep · 23rd March 2007, 17:43

Quote:

Originally Posted by moralfibre

Carb or MPFi?

Title of the thread says *Carb*

mtnrajdeep · 23rd March 2007, 17:54

Quote:

Originally Posted by moralfibre

Which year model is this? Carb or MPFi?

It is a 98 model Carb Zen only!

kpzen · 23rd March 2007, 17:56

Quote:

Originally Posted by mtnrajdeep

The car does not cross 110-120 kmph in 5th gear on the highways....got everything checked at an authorised service center and it is fine. So checking out if the engine is able to reach the max speed in atleast every gear

A normal good zen carb engine should reach 110 easily....Time to get a good service i guess...
Try 4th gear at that speed..!!

mtnrajdeep · 23rd March 2007, 18:00

Quote:

Originally Posted by kpzen

A normal good zen carb engine should reach 110 easily....Time to get a good service i guess...
Try 4th gear at that speed..!!

I tried this immediately after a service only. I usually shift up to 5th at about 60kmph and then am only in 5th throughout. Havent tried being accelerating to higher speeds in lower gears till now. Will try to check this out sometime

humyum · 23rd March 2007, 18:28

4th gear have tried 130 in a battered zen with worn bearings/suspension+steering..so i m soo sure a good condition carb zen will atleast reach 140 as a top speed..!!

drifter · 23rd March 2007, 19:08

In 5th you will not achieve top speed, the gear is for cruising. Use 4th gear for top speed. You will notice, if you were doing 140, the minute you shift to 5th, your speed would drop.

Drifter

DCEite · 23rd March 2007, 19:13

Quote:

Originally Posted by drifter

In 5th you will not achieve top speed, the gear is for cruising. Use 4th gear for top speed. You will notice, if you were doing 140, the minute you shift to 5th, your speed would drop.

How is it different for a Diesel vehicle? For example I read somewhere that Swift VDi top speed is achieved in 5th gear, not in 4th.

drifter · 23rd March 2007, 19:27

Its got to do with the torque characteristics of diesels. They produce higher amount of torque than similar capacity petrols.

Yup you probably read it correct about the swift ddis. Even my accent crdi achieved its top speed in 5th gear.

Drifter

heavy_foot · 23rd March 2007, 19:58

have been doing 145kmph in 4th regurlarly on a stock carb zen...just waiting to see how she responds to basic mods.

SLK · 24th March 2007, 10:26

Quote:

Originally Posted by drifter

Its got to do with the torque characteristics of diesels. They produce higher amount of torque than similar capacity petrols.

Yup you probably read it correct about the swift ddis. Even my accent crdi achieved its top speed in 5th gear.

If I am not wrong, even the NHC does its top in 5th.... again b'coz the peak power comes in quite early at 5000rpm (more like diesel) though the revv limit remains at 6000rpm.

And about the zen in question here.... i don't think it would serve any purpose pushing the car in every gear, because it would always meet those benchmarks. As the case seems there is a marginal loss of power and it would be only evident in 4th and 5th gears.

Moreover, I assume this 110-120km/h in the 5th gear was done only with one person aboard, b'coz with something like 4-5 people 120km/h is ok for that car.

23rd March 2007, 14:15	#1
mtnrajdeep BHPian Join Date: Feb 2006 Location: Bangalore Posts: 953 Thanked: 403 Times View My Garage	What is the max speed in each gear for a carb zen Hi Guys I was trying to push my zen to the max possible speed in second gear and was surprised when the speedo crossed 60 kmph as I thought that the max in 2nd would be around 40. Has anyone tried maxing their carb zen's in each gear? If so, what is the max speed in each gear for the carb version? and what is the difference in these speeds for the mpfi version? Rajdeep
	() Thanks

23rd March 2007, 15:49	#2
kpzen Senior - BHPian Join Date: Oct 2004 Location: Faridabad Posts: 5,609 Thanked: 1,882 Times View My Garage	1st can do 40kmph..!! 2nd gear can do 80kmph..!!! But why do u want to do this ?
	() Thanks

23rd March 2007, 16:05	#3
revtech Senior - BHPian Join Date: Nov 2004 Location: Bombay Posts: 1,992 Thanked: 39 Times View My Garage	ive done ... 1st gear 40 kmph 2nd gear 80 kmph 3rd gear 110 kmph 4th gear 135 kmph
	() Thanks

23rd March 2007, 18:28	#10
humyum Senior - BHPian Join Date: Feb 2006 Location: Mumbai Posts: 2,824 Thanked: 5,848 Times	4th gear have tried 130 in a battered zen with worn bearings/suspension+steering..so i m soo sure a good condition carb zen will atleast reach 140 as a top speed..!!
	() Thanks

23rd March 2007, 19:08	#11
drifter Senior - BHPian Join Date: Sep 2004 Location: Bombay Posts: 1,488 Thanked: 75 Times View My Garage	In 5th you will not achieve top speed, the gear is for cruising. Use 4th gear for top speed. You will notice, if you were doing 140, the minute you shift to 5th, your speed would drop. Drifter
	() Thanks

23rd March 2007, 19:27	#13
drifter Senior - BHPian Join Date: Sep 2004 Location: Bombay Posts: 1,488 Thanked: 75 Times View My Garage	Its got to do with the torque characteristics of diesels. They produce higher amount of torque than similar capacity petrols. Yup you probably read it correct about the swift ddis. Even my accent crdi achieved its top speed in 5th gear. Drifter
	() Thanks

23rd March 2007, 19:58	#14
heavy_foot BANNED Join Date: Jun 2004 Location: Navi Mumbai/LDN Posts: 1,052 Thanked: 174 Times	have been doing 145kmph in 4th regurlarly on a stock carb zen...just waiting to see how she responds to basic mods.
	() Thanks