What happens after redline?
10-27-2003 | 11:11 PM
#26
Forum Vendor
Joined: Jul 2003
Posts: 1,223
Likes: 1
From: Edmonton, Alberta
Originally posted by red_rx8_red_int
The fuel does not cutoff. To those that have not yet hit the fuel cutoff, Mazda should not have called this a cutoff. The fuel flow does not stop! It just does not increase! You maintain power. They could not have regulated this with an ignition cutoff.
The fuel does not cutoff. To those that have not yet hit the fuel cutoff, Mazda should not have called this a cutoff. The fuel flow does not stop! It just does not increase! You maintain power. They could not have regulated this with an ignition cutoff.
I did not know this, and never checked.
I simply avoid redlining it to that point.
There is no reason to. This engine makes max horsepower at 8,500rpm, and falls off quickly after that point.
When you hear the buzzer it is time to shift.
10-28-2003 | 01:26 AM
#27
Prodigal Wankler
Joined: Nov 2002
Posts: 1,761
Likes: 2
From: Austin, TX
Originally posted by canzoomer
I simply avoid redlining it to that point.
There is no reason to. This engine makes max horsepower at 8,500rpm, and falls off quickly after that point.
When you hear the buzzer it is time to shift.
I simply avoid redlining it to that point.
There is no reason to. This engine makes max horsepower at 8,500rpm, and falls off quickly after that point.
When you hear the buzzer it is time to shift.
10-28-2003 | 02:11 AM
#28
Forum Vendor
Joined: Jul 2003
Posts: 1,223
Likes: 1
From: Edmonton, Alberta
Originally posted by eccles
Not quite true. While it's true that the HP tails off after 8500, it's also true that there is always more torque available at the wheels (and thus more acceleration available) all the way to the redline in each gear than at the same speed in the next higher gear. See this post for more detail.
Not quite true. While it's true that the HP tails off after 8500, it's also true that there is always more torque available at the wheels (and thus more acceleration available) all the way to the redline in each gear than at the same speed in the next higher gear. See this post for more detail.
While I am NOT the definitive drag racer, I ran some 1/4's on my RX-8.
This was during tuning tests on our fuel/air/ignition controller.
I got best time with shift point at under 9,000 than over.
Best time with fuel/air only, up 25HP was a 14.68
Best time stock was 14.93
Best time with fuel/air/advance, around 50HP up was a 14.36
When I tried running the last one with higher shift points I got about a 1/10th less performance.
For those who say my 1/4's suck, yeah, you are right, no 8K drops, and the reflexes of a 47 year old (me).
I am also at around 3,000 feet altitude.
But Hey, it could be my driving, I admit that.
10-28-2003 | 02:39 AM
#29
Alpha Powered
Joined: Jan 2003
Posts: 293
Likes: 0
From: VA
Originally posted by canzoomer
If you say so!
While I am NOT the definitive drag racer, I ran some 1/4's on my RX-8.
This was during tuning tests on our fuel/air/ignition controller.
I got best time with shift point at under 9,000 than over.
Best time with fuel/air only, up 25HP was a 14.68
Best time stock was 14.93
Best time with fuel/air/advance, around 50HP up was a 14.36
When I tried running the last one with higher shift points I got about a 1/10th less performance.
For those who say my 1/4's suck, yeah, you are right, no 8K drops, and the reflexes of a 47 year old (me).
I am also at around 3,000 feet altitude.
But Hey, it could be my driving, I admit that.
If you say so!
While I am NOT the definitive drag racer, I ran some 1/4's on my RX-8.
This was during tuning tests on our fuel/air/ignition controller.
I got best time with shift point at under 9,000 than over.
Best time with fuel/air only, up 25HP was a 14.68
Best time stock was 14.93
Best time with fuel/air/advance, around 50HP up was a 14.36
When I tried running the last one with higher shift points I got about a 1/10th less performance.
For those who say my 1/4's suck, yeah, you are right, no 8K drops, and the reflexes of a 47 year old (me).
I am also at around 3,000 feet altitude.
But Hey, it could be my driving, I admit that.
How did you launch the car?
Cheers,
D-san
10-28-2003 | 05:36 PM
#31
mostly harmless
Joined: Jun 2002
Posts: 3,440
Likes: 0
From: Greater Vancouver Area, BC
Originally posted by canzoomer
Best time stock was 14.93
it could be my driving, I admit that.
Best time stock was 14.93
it could be my driving, I admit that.
good job man. i'm sure it's better than i could do.
10-28-2003 | 10:07 PM
#33
Registered User
Joined: Jul 2003
Posts: 911
Likes: 1
From: NC
Originally posted by canzoomer
This engine makes max horsepower at 8,500rpm, and falls off quickly after that point.
When you hear the buzzer it is time to shift.
This engine makes max horsepower at 8,500rpm, and falls off quickly after that point.
When you hear the buzzer it is time to shift.
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