why is it that no one ever talks about the fact that the S14 and S15 have it and the S13 don't.....isn't this a good thing? if so why do people say that getting the S14 Sr20 not worth it cause it's not much better than the redtop.....
anyone got any info on VVT? and for the newbies it's Varible Valve Timing....
Vvt
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ItzGenX
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VVT - Continuous Intake Valve Timing. There is nothing special about this that there is to talk about. The reason for the VVT is because of the Low Intake port design used for the S14 and later SR20DETs. The Low Intake Port design is a shorter distance to the valves from the intake manifold, but must curve and go around the lifter supports. This in turn leads to less breathing due to the turbulence the intake air must go through before hitting the back of the valve. Also, being a Low Intake port design, the port literally can not contour to enter the cylinder at a good angle (and thus VVT to hold duration slighly longer to capture more air). The S13 high port design was literally a straight even path with light curvatures to get into the combustion chamber. The even amount of airflow and a good angle to enter the combustion chamber didn't need this VVT to get the even power as the S14 generation (S15 is stronger because of the turbo). Not only did the S13 motor match that of a S14, but it did everything the S14 could at a lower RPM. The change was made between the S13 and S14 motors because of the emissions standards from that of a long port. It was believed that a longer port had less "control" over emissions because of the length the air had to travel into the engine would be "delayed". With all that in mind, would you want to pay 1000 extra for something you didn't want? I personally like the High Port design of the S13 and don't need any of that other fancy stuff they changed. S13 SR20s also respond better to upgrades because of the port design takes it so well, especially turbo upgrades. Before I knew anything about the S14 and later motors, I thought they were the one to go with and the one I wanted, with a little bit of research and long chats with the Australians, you learn that VVT was sort of a cover up for Nissan having to change the port designs.
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I H8 UR DSM
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Redline240
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wow man thanks, i always thought the S14 and S15 SR's were better, especially since they boast a higher stock HP....but then again they do use a T28 instead of the T25 in the red top......looks like i'm gonna have to look into the S13 SR and the wiring needed to fit into a S14.....thanks for the info.....is either models block or internals stronger?
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I H8 UR DSM
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I H8 UR DSM
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but when you have a blacktop, and u open your hood, all the newbies, honduh and dsm boys think they can impress and always comment "oh, NICE, and S14 right!", and you say "Eh, no d***, its an S13 blacktop", and there usual response is "oh, i didnt know there was an s13blacktop..." d!kkkk's then they realise their Nissan newbiness : )
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I H8 UR DSM
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I H8 UR DSM
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I H8 UR DSM
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