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Joined: Oct 2003
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Clos
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Clos
2000 Spectra Blue Toyota Celica
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2000 Toyota Celica

Joined: Oct 2003
Posts: 3,038
Alexandria, VA
Sep 7, 10:02pm - #269436 
lucky if you see this click on it

okay i have a question, i showed the video of you shifting at 8,600 rpm to a friend, and he asked me how come you do that, he was wondering if our engines still make power after red line, he said something like the engines should stop producing hp wen they reach the red line, is this true or false?

Joined: Oct 2003
Posts: 3,038
Clos
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Clos
2000 Spectra Blue Toyota Celica
Specialist
2000 Toyota Celica

Joined: Oct 2003
Posts: 3,038
Alexandria, VA
Sep 7, 10:03pm - #269437 
anyone else thats knows about this can help 2

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Posts: 10,123
VSGTS14
05 WRB
VSGTS14

05 WRB
2005 Subaru WRX STi

Joined: Jul 2002
Posts: 10,123
Milford, NJ
Sep 7, 10:03pm - #269438 
well he prob played with that power fc and made his engine go nutz


SUBARU TECNICA INTERNATIONAL
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genax
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genax
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2001 Toyota Celica GT

Joined: Oct 2003
Posts: 41
425,253
Sep 7, 11:16pm - #269439 
you canmake power with proper tuning butwhy risk bending a valve?


lifehappensevenwhileyourplanning
Joined: May 2003
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spaztikid
dikitzaps
spaztikid
dikitzaps
1974 Toyota Celica

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LA
Sep 7, 11:19pm - #269440 
power FC allows different maps to be made... allowing more power to be made at higher rpm's.

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Haulin_A_Doo
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Haulin_A_Doo
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Ontario
Sep 8, 12:17am - #269441 
Revs are limited by a computer, not because the engine can't make horse power above redline, but because the motor will not take the extreem punishment. As soon as you remove the rev limiter using power FC, even without tuning, the GTS will make power all the way past 9,000.

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Posts: 2,454
Elec-FuYu
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Elec-FuYu
2003 Silver Toyota Celica
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2003 Toyota Celica

Joined: May 2003
Posts: 2,454
B.C. Coquitlam
Sep 8, 12:27am - #269442 
" he said something like the engines should stop producing hp wen they reach the red line, is this true or false? "

true, to honda engines.

our GTS engine makes power till about 8600rpm (where redline is at 7800rpm). then it start to drop, but maintaining an average of 160whp until 9000rpm (where the cams, valves starts to vibrate, causing unstableness)

where as the vtec engines stops making power after redline (the cams, valves starts to vibrate, causing unstableness even b4 redline). the car actually slows down when you pull longer on a gear over redline.

this is on engine with STOCK blocks, cams, valves. Modded ECU is to be used to go pass redline. but the hardware of the eninge is remained STOCK.

there it shows the difference of the limits of the two engine.


I am a HID Maniac!!
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Illusive
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Illusive
Member

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Posts: 396
Southern California
Sep 8, 1:22pm - #269443 
holy moly thats a lot of incorrect information spineyes

basically the engine stops making power at around 8200 rpms.

when anyone finds a gts N/A that makes power to 9K rpms let me know wink

the next question,
why shift at 8600.
simple answer =lift
complex answer= in order to get the best possible acceleration you want to stay on the highest curve in the powerpand, on our cars with tuning on the pfc we can make peak power at 8200 rpms, but only loose about 5whp by 8600 rpms, if one were to shift at 8200 rpms (and still land in lift) you would be making less horse power at 6000-6500 rpms than if you held the gear till 8600 and then shifted and landed around 6600 rpms.
at 8600 rpms on our cars the engine makes the same power at 6600 rpms therefore that is the idea "sweat spot" you want to stay in for maximum acceleration.
gearing and tire size play a role in the shift point also, you do not want to shift 4th at 8600 rpms because 4th gear is so (numerically shorter) than 3rd gear, when you up shift 4th gear at 8600 rpms you rpms drop to about 68-6900 rpms, this would hinder acceleration because the sweet spot is right at 6600, so you would need to upshift 4th gear around 8200 rpms in order to stay in the engines sweet spot.

this is all with the apexi power FC of course.

btw tell your friend hes a tool, and redline doesn't mean the engine stops making power after that point, manufacturers put that there to stop the average idiot from blowing his engine(which is also why rev limiters are installed on production vehicles)


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