View Poll Results: do you shift past redline
no, i do what mazda tells me to.
78
31.45%
yes, but just a little bit.
98
39.52%
heck yeah, redline="sugestion"
72
29.03%
Voters: 248. You may not vote on this poll
poll: who shifts past the stock redline?
12-29-03, 01:18 PM
#26
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Originally posted by andrew lohaus
youre power should be good till at least 8k unless you have an auto. is the vdi working.
youre power should be good till at least 8k unless you have an auto. is the vdi working.
oh, and I would rather be shot than own another auto
12-29-03, 03:45 PM
#27
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Originally posted by andrew lohaus
yeah i love how rotaries dont have redlines in the sense of "beyond this rpm your pistons generate a momentum/force in excess of your connecting rod's tensile strenght, therfore engine WILL go boom" we have more freedom to find a practical redline that fits one's mods/lack thereof
yeah i love how rotaries dont have redlines in the sense of "beyond this rpm your pistons generate a momentum/force in excess of your connecting rod's tensile strenght, therfore engine WILL go boom" we have more freedom to find a practical redline that fits one's mods/lack thereof
12-29-03, 04:53 PM
#29
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Originally posted by NZConvertible
or the flywheel or pressure plate that I personally have seen expode on half a dozen occasions due to excessive revs (destroying the engine and gearbox, and damaging other cars).
or the flywheel or pressure plate that I personally have seen expode on half a dozen occasions due to excessive revs (destroying the engine and gearbox, and damaging other cars).
oooh, did it take out any civics?
12-29-03, 05:54 PM
#31
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Originally posted by Rotorific
Any stock car S4 or S5 is not capable of clutch/flywheel shatter.
Any stock car S4 or S5 is not capable of clutch/flywheel shatter.
And you base this on what?
Sorry to disagree, seen it!
As a mater of fact I have seen this happen (or seen the end result) many times in many cars besides rotaries. One dumb *** downshifted his SUPERBIRD (kids IM me if you dont know what this is) from 4th to second at 120 mph trying to catch an exit he thought he was going to miss. Spent the rest of his days in a wheel chair with 2 stubs for legs.
Somewhere I have pic's of a s4 in a zillion pieces (stock) also have a chunk of a RX3 flywheel somewhere in the garage.
12-29-03, 06:02 PM
#32
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Re: poll: who shifts past the stock redline?
Originally posted by andrew lohaus
ok i know they call it redline for a reason, but i was just curious as to who gets power past redline and if so, do you shift past that point.
personally, my s5 makes good power out to about 8250 so i stay in it that far at least in first gear and sometines second (i know, my tranny loves me.
).
so if you are shifting beyond what mazda thought was appropriate what mods if any led you to that power band and hase this over revving led to any dissasters?
ok i know they call it redline for a reason, but i was just curious as to who gets power past redline and if so, do you shift past that point.
personally, my s5 makes good power out to about 8250 so i stay in it that far at least in first gear and sometines second (i know, my tranny loves me.
).so if you are shifting beyond what mazda thought was appropriate what mods if any led you to that power band and hase this over revving led to any dissasters?
12-29-03, 06:52 PM
#33
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in my defnese im not trying to advocate going out and putting your foot to the gas until something goes boom. and yes i aknwoledge that things can and will fail at high rpm. but it seams a little too conservative to me to assert that even a few few hundred rpm beyond what the tach says is redline will imeadiatly lead to a failed engine and fly-wheel amputated legs. when mazda designated a "red line" they were abviously considering the mechanical capabilities/limits of the mottor but they also needed to arive at a number that will essentialy gauranty zero percent chance of mechanical failure. in other words they definetly rounded down some from the rpm range where you begin to risk machical failure. and venturing just a little into the realm of statisticaly (although marginaly at first) higher odds of mechical failure seems like a reasonable trade off to land in your powerband after a shift.
call me crazy but i doubt my engine will boom at 8250.probobly at 9k+ but give me a break.
call me crazy but i doubt my engine will boom at 8250.probobly at 9k+ but give me a break.
12-29-03, 06:59 PM
#34
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Originally posted by Mr. Gadget
One dumb *** downshifted his SUPERBIRD from 4th to second at 120 mph trying to catch an exit he thought he was going to miss. Spent the rest of his days in a wheel chair with 2 stubs for legs.
One dumb *** downshifted his SUPERBIRD from 4th to second at 120 mph trying to catch an exit he thought he was going to miss. Spent the rest of his days in a wheel chair with 2 stubs for legs.
12-29-03, 07:15 PM
#35
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When mine hits fuel cut at 7250, I shift. The engine is ported and pulls up to that range pretty well, but I don't do it a lot. I don't like the stock flywheel.
12-29-03, 09:39 PM
#37
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rx7 are unique cars. they have the bell housing ahead of your feet and can be seen right underneth the hood in the fc. from what i have heard it is so you can really take it up in the rpms without having a blow-proof bell housing but of course not all people would be lucky with that. when i take my rx7 to the tracks i will usually take it up to 8000 with my fc but no more then that, when i drive on the streets i take it really easy i will only take it up to 3-3.500 so my secondary injectors dont kick in and give me **** poor gas mileage
12-29-03, 11:55 PM
#38
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I hate to go over 8k in my S5 because my warning buzzer is my horn. I don't care for it being so loud, except when I am in the 1/4 because it makes some people I race nerveas when the horn starts beaping.
12-30-03, 12:45 AM
#39
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Originally posted by red_ricer
when i drive on the streets i take it really easy i will only take it up to 3-3.500 so my secondary injectors dont kick in and give me **** poor gas mileage
when i drive on the streets i take it really easy i will only take it up to 3-3.500 so my secondary injectors dont kick in and give me **** poor gas mileage
12-30-03, 02:06 AM
#41
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Originally posted by NZConvertible
The secondary injectors have zero effect on gas mileage.
The secondary injectors have zero effect on gas mileage.
12-30-03, 02:21 AM
#42
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the secondary injectors don't come on and suddenly dump shitloads of fuel in. I don't see what's hard to understand. Higher revs make for slightly worse fuel consumption, but if the ecu was tuned so the secondarys kicked in at 2500, it wouldn't make a difference.
12-30-03, 03:47 AM
#44
If you are driving really fast the secondaries do effect gas milage.
Back when I had my 88 vert (only 5speed FC with a 3.9 diff) I averaged 27 mpg on some legs of my trip to sevenstock 5. That was at 95 mph and 3600ish rpms.
On another leg of the trip. The crusing speed was around 105-110. RPMs at that speed were around 4k. Seconday injectors come on at 3800. gas milage was then around 19mpg on that leg of the trip.
Slowed down to 3700 rpms and walla! 27 mpg! I was amazed at the differece.
Just my experience.
Steve
Back when I had my 88 vert (only 5speed FC with a 3.9 diff) I averaged 27 mpg on some legs of my trip to sevenstock 5. That was at 95 mph and 3600ish rpms.
On another leg of the trip. The crusing speed was around 105-110. RPMs at that speed were around 4k. Seconday injectors come on at 3800. gas milage was then around 19mpg on that leg of the trip.
Slowed down to 3700 rpms and walla! 27 mpg! I was amazed at the differece.
Just my experience.
Steve
12-30-03, 10:58 AM
#45
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Originally posted by Mr. Gadget
And you base this on what?
Sorry to disagree, seen it!
As a mater of fact I have seen this happen (or seen the end result) many times in many cars besides rotaries. One dumb *** downshifted his SUPERBIRD (kids IM me if you dont know what this is) from 4th to second at 120 mph trying to catch an exit he thought he was going to miss. Spent the rest of his days in a wheel chair with 2 stubs for legs.
Somewhere I have pic's of a s4 in a zillion pieces (stock) also have a chunk of a RX3 flywheel somewhere in the garage.
And you base this on what?
Sorry to disagree, seen it!
As a mater of fact I have seen this happen (or seen the end result) many times in many cars besides rotaries. One dumb *** downshifted his SUPERBIRD (kids IM me if you dont know what this is) from 4th to second at 120 mph trying to catch an exit he thought he was going to miss. Spent the rest of his days in a wheel chair with 2 stubs for legs.
Somewhere I have pic's of a s4 in a zillion pieces (stock) also have a chunk of a RX3 flywheel somewhere in the garage.
12-30-03, 11:24 AM
#46
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Originally posted by NZConvertible
If this is true, then why do rotary engines still have redlines? Perhaps it's because there are components that will in fact go boom if you stupid enough to decide on your own redline? How about e-shafts that flex so the rotors contact the housings (destroying the engine), or the flywheel or pressure plate that I personally have seen expode on half a dozen occasions due to excessive revs (destroying the engine and gearbox, and damaging other cars).
If this is true, then why do rotary engines still have redlines? Perhaps it's because there are components that will in fact go boom if you stupid enough to decide on your own redline? How about e-shafts that flex so the rotors contact the housings (destroying the engine), or the flywheel or pressure plate that I personally have seen expode on half a dozen occasions due to excessive revs (destroying the engine and gearbox, and damaging other cars).
12-30-03, 04:12 PM
#47
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Originally posted by casio
please explain this in more detail as it seems to be a bit misleading.
please explain this in more detail as it seems to be a bit misleading.
When the transition is made from the primaries firing to all four firing, the injector pulsewidth is halved. This means the fuel flow rate immediately after the transition is exactly the same as before it. There's no sudden jump is fuel flow. That would result in rich mixtures and a loss of power.
Obviously the engine uses more fuel over 3800rpm than below it, but that's for the same reason the engine uses more fuel over 5000rpm than below it; it's simply revving higher and making more power. It has nothing to do with the fact that the secondaries are firing.
12-30-03, 05:29 PM
#48
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Originally posted by Mr. Gadget
Somewhere I have pic's of a s4 in a zillion pieces (stock) also have a chunk of a RX3 flywheel somewhere in the garage.
Somewhere I have pic's of a s4 in a zillion pieces (stock) also have a chunk of a RX3 flywheel somewhere in the garage.
im curious because if it wasnt that far off from the stock redline i might reconsider my stance on this subject.
