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| Engineering/ Technical Ask technical questions about cars. Do you know how a car engine works? |
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#1
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WHats up with the redline on the skyline?
I was reading banzi (british mag) rescently and it featured a GT-R that could rev to 11,000rpm. the owner said that he had put a pulley kit on it or something, to make it rev that high. This made me think of a couple of questions concerning rpms and speed.
1. I know that skylines have been famous for there ablity to withstand huge loads of power (1000bhp), but how do they do this? I want to know basically what makes it so different from other cars 2. excluding the pully thing, how are Skylines able to produce such a high red line in general and still have a realatively high top speed and incredable 0-60 time(high torque) together? is it just because they are 4 wheelers or what? I know the stroke is really small (something like 2.9) so how is this possible? 3. I want to own a 97 mustang cobra (and twin turbocharge it). is there anyway to jack up the redline as I am looking for better top end power right now (high rpm sounds so cool). I don't want to adjust the c.r. too much, as that can really F&%$ up an engine. besides its 3.7" (squared) so it will only change from quite big to regular big even if I modify it a lot Thanx in advance y'all by the way IMPORTS Rock and stangs too but unfortunetly not stang culture. I am a firm believer that there is a replacement for displacement- Its called BOOST just to make sure I'm correct about all this redline stuff for check me: assuming same displacement and cylinder # a low c.r. means that the end of the connecting rod must be closer to the crankshaft. This shortens the distance of the of the moment arm which directly effects the amount of force each cylinder is able to exert on the crankshaft (less torque). however at the same time this allows the crankshaft to turn at a faster rate which in turn leads to higher rpms. simply: a low compression ratio = higher redline than a high c.r. because the engine produces less torque Not to shaby for a 7teen year old, eh? |
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#2
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Re: WHats up with the redline on the skyline?
The skylines are more than likely balanced to be able to turn RPM numbers like that. If you want to rev a Cobra that high, lots of custom work in balancing and such. There are high compression motors that rev just as high.
My motor is balanced to run up to 8,000 rpm, but it'll never see that. I had my cam ground to be able to pass the CA smog test, so I'll never be able to rev that high....
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1993 Mustang GT Blue/Titanium 2tone, 5spd, 3.55s, JBA ceramic shorties, catted H-pipe, dumped Magnaflows, MSD goodies, FMS alum rad, Pro50, balanced/blueprinted forged 327 stroker (8.2 compression), AFR 185s, Performer RPM, 70mm TB, FTI custom cam, SFC, In-floor Subframes, Maximum Motorsports Torque Arm and Panhard Bar, H&R Springs, Bilsteins, MM CC plates, 5 Lug Conversion w/ Silver Bullitts. Full accessories including smog legal. 310rwhp 351rwtq Dyno Dynamics Dyno. Soon to be supercharged |
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#3
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Re: WHats up with the redline on the skyline?
Quote:
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Some things are impossible, people say. Yet after these things happen, the very same people say that it was inevitable. |
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#4
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thanks runningmole
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