wut can i rev to????????
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From: houston, tx, USA
wut can i rev to????????
wut can i safely rev to with this setup:
97 JDM B16A block
97 JDM B16A tranny
new clutch specialist
ITR shaved flywheel
custom intake manifold
98 GSR head port and polished
skunk2 springs
titanium retainers
ferrera valves
skunk2 short shifter
Jun 2 intake cam and ITR exhaust cam
skunk 2 cam gears
97 JDM B16A block
97 JDM B16A tranny
new clutch specialist
ITR shaved flywheel
custom intake manifold
98 GSR head port and polished
skunk2 springs
titanium retainers
ferrera valves
skunk2 short shifter
Jun 2 intake cam and ITR exhaust cam
skunk 2 cam gears
Joined: Jun 2003
Posts: 674
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From: DC2R
Re: wut can i rev to???????? (this guy 2fast)
Where does the engine stop making power?
What are the Specs on the Cams? Stiffer Springs should hold you SAFELY arounf 9-10k But I don't know with those Cams how much your engine is going to be breathing up in that range.
I am not sure but add 1330 rpms to the Stock B16 power peak and that might give you an idea where you're making power to, but since you have the GSR head I am not sure if that will apply here.
I would get another EX cam cause you are shooting your self in the foot with the extra duration you could set your timing just right that the vaccum from the exhaust stroke will pull more air into the chamber, but you have to get that exhaust out of there before more fresh air can occupy that space. Just a thought
Modified by Spoond TEG at 2:44 AM 8/25/2003
What are the Specs on the Cams? Stiffer Springs should hold you SAFELY arounf 9-10k But I don't know with those Cams how much your engine is going to be breathing up in that range.
I am not sure but add 1330 rpms to the Stock B16 power peak and that might give you an idea where you're making power to, but since you have the GSR head I am not sure if that will apply here.
I would get another EX cam cause you are shooting your self in the foot with the extra duration you could set your timing just right that the vaccum from the exhaust stroke will pull more air into the chamber, but you have to get that exhaust out of there before more fresh air can occupy that space. Just a thought
Modified by Spoond TEG at 2:44 AM 8/25/2003
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From: where civics tend to disappear, NC
Re: wut can i rev to???????? (advanracing62)
I can't believe people have these setups and still ask this same stupid question.
You just poured thousands into your engine, why don't you finish it with the REQUIRED last step and take it to a dyno.
You just poured thousands into your engine, why don't you finish it with the REQUIRED last step and take it to a dyno.
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Re: wut can i rev to???????? (CRX PAT)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX PAT »</TD></TR><TR><TD CLASS="quote">I can't believe people have these setups and still ask this same stupid question.
You just poured thousands into your engine, why don't you finish it with the REQUIRED last step and take it to a dyno. </TD></TR></TABLE>
yeah... the dyno is the only way to tell how high you need to rev it....... rev that ho till it stops making power. b16 can go 10k if you want
You just poured thousands into your engine, why don't you finish it with the REQUIRED last step and take it to a dyno.
</TD></TR></TABLE>yeah... the dyno is the only way to tell how high you need to rev it....... rev that ho till it stops making power. b16 can go 10k if you want
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From: Southern cali or boston
Re: wut can i rev to???????? (Furry in your eye)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Furry in your eye »</TD></TR><TR><TD CLASS="quote">
yeah... the dyno is the only way to tell how high you need to rev it....... rev that ho till it stops making power. b16 can go 10k if you want</TD></TR></TABLE>
lets take my old dyno graph for example
Why should I shift at 7800 RPM, thats my peak power... but then I fall out of vtec... If I take it to 8300, then I'd land at 600 RPM's higher, which with my tranny was 6300RPM instead of 5700 RPM...
so just curious, why should i shift at 7800 instead of 8300...
it makes sense to me, to look at a dyno graph, know your gear ratios and figure out the best place to shift on which RPM range will give you the MOST power.
It would even be better for me to shift higher then 8300, but with a b16 valvetrain and ITR cams, i dont want to risk it.
dont mind the untuned dyno graph
stock b16 ecu
yeah... the dyno is the only way to tell how high you need to rev it....... rev that ho till it stops making power. b16 can go 10k if you want</TD></TR></TABLE>
lets take my old dyno graph for example
Why should I shift at 7800 RPM, thats my peak power... but then I fall out of vtec... If I take it to 8300, then I'd land at 600 RPM's higher, which with my tranny was 6300RPM instead of 5700 RPM...
so just curious, why should i shift at 7800 instead of 8300...
it makes sense to me, to look at a dyno graph, know your gear ratios and figure out the best place to shift on which RPM range will give you the MOST power.
It would even be better for me to shift higher then 8300, but with a b16 valvetrain and ITR cams, i dont want to risk it.
dont mind the untuned dyno graph
stock b16 ecu
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From: Lorton, VA
Re: wut can i rev to???????? (this guy 2fast)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by this guy 2fast »</TD></TR><TR><TD CLASS="quote">wut can i rev to????????</TD></TR></TABLE>
whatever you limiter goes to
whatever you limiter goes to
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From: Southern cali or boston
Re: wut can i rev to???????? (Furry in your eye)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Furry in your eye »</TD></TR><TR><TD CLASS="quote">shifting at peak power is normally useless unless you have a perfect tranny.. most of the time going 700-1200 pas peak will result in faster times b/c rember, torque is multiplied by the gear ratios... </TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Furry in your eye »</TD></TR><TR><TD CLASS="quote">
yeah... the dyno is the only way to tell how high you need to rev it....... rev that ho till it stops making power. b16 can go 10k if you want</TD></TR></TABLE>
1st u said rev till you stop making power, now ur saying rev 700-1200 past peak power...
Im forever confused about how a tranny is a torque multiplier
if you took different trannies, you will get differnet results on a dyno?
that doesnt make sense...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Furry in your eye »</TD></TR><TR><TD CLASS="quote">
yeah... the dyno is the only way to tell how high you need to rev it....... rev that ho till it stops making power. b16 can go 10k if you want</TD></TR></TABLE>
1st u said rev till you stop making power, now ur saying rev 700-1200 past peak power...
Im forever confused about how a tranny is a torque multiplier
if you took different trannies, you will get differnet results on a dyno?
that doesnt make sense...
Joined: Oct 2000
Posts: 4,440
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From: Surrey, BC, Canada
Re: wut can i rev to???????? (irev210)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by irev210 »</TD></TR><TR><TD CLASS="quote">
1st u said rev till you stop making power, now ur saying rev 700-1200 past peak power...
Im forever confused about how a tranny is a torque multiplier
if you took different trannies, you will get differnet results on a dyno?
that doesnt make sense...</TD></TR></TABLE>
No, it doesn't make sense, because a dyno uses gear calculations to remove the transmission's torque multiplier effects. It does this through correction factors... you could dyno in 1st gear, but the multiplier factor from the tranny is so high that the correction factor from the dyno is huge and it gets all your #s inaccurate. That's why some cars dyno in 3rd and some in 4th and some in 5th... dyno in whatever gear puts you closest to 1:1 ratio, so you minimize the correction factor.
But indeed transmission is a power multiplier. That's why 1st gear typically pulls like a ***** and 5th gear is slow and boggy.
1st u said rev till you stop making power, now ur saying rev 700-1200 past peak power...
Im forever confused about how a tranny is a torque multiplier
if you took different trannies, you will get differnet results on a dyno?
that doesnt make sense...</TD></TR></TABLE>
No, it doesn't make sense, because a dyno uses gear calculations to remove the transmission's torque multiplier effects. It does this through correction factors... you could dyno in 1st gear, but the multiplier factor from the tranny is so high that the correction factor from the dyno is huge and it gets all your #s inaccurate. That's why some cars dyno in 3rd and some in 4th and some in 5th... dyno in whatever gear puts you closest to 1:1 ratio, so you minimize the correction factor.
But indeed transmission is a power multiplier. That's why 1st gear typically pulls like a ***** and 5th gear is slow and boggy.
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From: DC2R
Re: wut can i rev to???????? (raene)
To over simplify things, the gearbox is no more than a complex lever. Taking off in first gear, the engine doesnft see the total mass of the car. It really sees the total mass divided by the total gear ratio. To illustrate, a Mini is roughly 1400lb without driver (wefll do this by remote control - I donft want any hate mail by different eweightf factions). Take a first gear ratio from a standard gearbox of 3.33, and multiply by final drive of said gearbox of 3.44. The over all ratio is 11.45. Now, the engine actually sees the weight of the car (1400lb) divided by the overall ratio in first gear (11.45) - so thatfs only 122-odd pounds. BUT it also sees the extra weight of the flywheel/clutch assembly and a few other drive train components - typically around 40lb. It now sees a total of around 162l
(Keith claver)
(Keith claver)
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Re: wut can i rev to???????? (Spoond TEG)
i didnt say rev it till it peaks... i said rev it till it stops making power....
when you get past peak far enough the power will fall off dramaticly
and yes different trannys can result in diff tq reading on a dyno. we use a dynapack, you have to enter the gear ratio for the car you have. it measuers actuall wheel tq and then calculates it to engine tq just as spoond teg said.
when you get past peak far enough the power will fall off dramaticly
and yes different trannys can result in diff tq reading on a dyno. we use a dynapack, you have to enter the gear ratio for the car you have. it measuers actuall wheel tq and then calculates it to engine tq just as spoond teg said.
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